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ordering information device temp range package mc44bs374t1d,r2 0c to +70c so16nb mc44bs374t1ad,r2 0c to +70c so16nb note: for tape and reel, add r2 suffix. so16nb package this document contains informati on on a product under development. freescale reserves the right to change or discontinue this product without notice. ? motorola, inc., 2003. all rights reserved. mc44bs374t1 mc44bs374t1a the mc44bs374t1 and mc44bs374t1a audio and video modulator are for use in vcrs, set-top boxes, and similar devices. these products are the next generation of the mc44bc374t1 with the following new features: ? tv output level 82dbuv typical for the mc44bs374t1a, 75 dbuv for the mc44bs374t1 ? 5v and 3.3v compatible i 2 c bus ? logic output port pin (pin 3) available figure 1 shows the pin connections. figure 1. mc44bs374t1 and mc44bs374t1a pin connections gndd vccd xtal gnd tvovcc audio gnd pllflt sda scl lop preem tvout vcca 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 splflt video so16 pin package advance information mc44bs374t1/374t1a rev. 1.2 11/2003 pll tuned uhf and vhf audio/video high integration modulator contents 1 features . . . . . . . . . . . . . . 2 comparing the mc44bs374t1/374t1a to the mc44bc374t1 . . . . . 2 pin descriptions . . . . . . . . 3 functional overview . . . . . 4 maximum ratings . . . . . . . 5 thermal ratings . . . . . . . . . 5 electrostatic discharge . . . 5 electrical characteristics . 6 i2c bit mapping . . . . . . . . . 7 i2c programming . . . . . . . . 8 modulator high frequency characteristics . . . . . . 10 video characteristics . . . 11 audio characteristics . . . 13 characterization measurement conditions 14 modes of operation . . . . . 20 high speed i2c compatible bus . . . . . . . . . . . . . . . . 24 pin circuit schematics . . 27 application diagrams . . . 28 evaluation board schematic and layout . . . . . . . . . . 29 packaging instructions . . 31 marking instructions31 f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information features 1 features the mc44bs374t1/374t1a is a pal/n tsc modulator with integrated vco. the channel is set by an on-chip high-speed i 2 c compatible bus receiver. a phase-locked loop ( pll ) tunes the modulator over the full uhf range. the modulator incorpor ates a sound subcarrier oscillator and uses a second pll to derive 4.5, 5.5, 6.0, and 6.5 mhz subcarrier frequencies. these frequencies are selectable by bus. the picture-to-sound ratio may be ad justed using the bus. in addition, an on-chip video test pattern generator can be switched on with a 1 khz audio test signal. the mc44bs374t1/374t1a have the following features: ? integrated on-chip programmable uhf oscillator ? no external varicaps diodes / inductor or tuned components ? extremely low external components count ? channel 21-69 uhf operation ? vhf range possible by internal dividers (30mhz-450mhz) ? boosted tv output level (82 dbuv typical) for the mc44bs374t1a ? tv output level of 75 dbuv typical for the mc44bs374t1 ? high speed read and write i 2 c-bus compatible (800khz) ? i 2 c-bus 5v and 3.3v compatible ? fixed video modulation depth (82% typical) ? peak white clip disabled by bus ? programmable picture/sound carrier ratio (12 db and 16 db) ? integrated on-chip programmable sound subcarrier oscillator (4.5 , 5.5, 6.0 and 6.5 mhz) - no external varicaps ? on-chip video test pattern generator with sound test signal (1khz) ? low-power programmable modulator standby mode ? transient output inhibit duri ng pll lock-up at power-on ? logical output port controlled by bus ? start-up on channel ?71? (871.25 mhz) ? esd protection, minimum 4 kv 2 comparing the mc44bs374t 1 and mc44bs374t1a to the mc44bc374t1 compared to the mc44bc374t1 de vices, the mc44bs374t1/374t1a ha s the following improvements: ? higher output level for the mc44bs374t1a (82 dbuv versus 74.5 dbuv) ? higher video signal to noise (+ 3 db) for the mc44bs374t1a ? i 2 c-bus 3.3v compatible ? lower power consumption in norm al and standby modes (-2 ma) f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
pin descriptions mc44bs374t1/374t1a advance information ? the device can be powered down without holding the i 2 c lines down ? switch between the two integrated vco?s controll ed directly by the frequency divider (@ 700 mhz) ? the external standby pin is no more required as the i 2 c lines are not hold down when the device is not powered up. ? the standby pin is replaced by the lop logic ouput port pin (pin 3) ? lower rf second harmonic spurious but higher th ird harmonic spurious. in the application it is easier to filter uhf third harmonics spurious than second harmonics as these frequencies are always out of the uhf band. unfortunatel y the second harmonic can fall ba ck into the same uhf band (for instance channel 21 second harmonic). for this reason it is almost impossible to have a good rejection of low uhf second harmonic with an ex ternal low pass filter. th is is the reason why the design has been optimized for a maximum second ha rmonic rejection in spite of an increase of the third harmonic. 3 pin descriptions table 1. so16 package pin descriptions pin number pin name description 1 scl i2c clock 2 sda i2c data 3 lop logical output port controlled by i2c bus 4 xtal crystal 5 gnd ground 6 preemp pre-emphasis capacitor 7 audio audio input 8 splflt sound pll loop filter 9 video video input 10 vcca main analog supply voltage 11 gnd analog ground 12 tvout tv output signal 13 tvovcc tv output stage supply voltage 14 pllflt rf pll loop filter 15 vccd digital supply voltage 16 gndd digital ground f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information functional overview 4 functional overview figure 2 shows a simplified block diagram of the mc44bs374t1/374t1a device. the mc44bs374t1/374t1a device has three main sections: 1. a high speed i 2 c-compatible bus section 2. a pll section to synthesize the uhf / vhf output channel frequen cy (from an integrated uhf oscillator, divided for vhf output) 3. a modulator section, which accepts audio and vi deo inputs, then uses them to modulate the uhf/vhf carrier an on-chip video test pattern generator with an audio test signal is included. the mc44bs374t1/374t1a operates as a multi-standard modulator and can handle the following systems using the same external circuit components: b / g, i, d / k, m / n. high frequency bicmos technology allows integration of the uhf ta nk circuit and certain filtering functions. figure 2. mc44bs374t1/374t1a simplified block diagram 8 13 1 2 6 11 14 9 4 12 7 3 10 15 16 tvovcc tvout lop video spllflt audio vcca gnd preem xtal pllflt gndd vccd scl sda bus section vco and pll section modulator section clamp peak white 31.25khz 4mhz xco ref divider /128 phase comp pll prog divider prescaler/8 vhf dividers video modulator lpf lpf rf sound modulator alc lpf prog divider audio amplifier sound oscillator and fm modulator sound pfd high speed i 2 c bus receiver uhf osc i 2 c bus i 2 c bus i 2 c bus i 2 c bus i 2 c bus 75 ? 5 gnd clip 31.25 khz fm f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
maximum ratings mc44bs374t1/374t1a advance information 5 maximum ratings 6 thermal ratings 7 electrostatic discharge electrostatic discharge ( esd ) tests are done on all pin s sym parameter value unit r thja thermal resistance from junction to ambient 102 c/w sym parameter min unit esd mm (machine model) - mil std 883c method 3015-7 400 v esd hbm (human body model) - mil std 883c method 3015-7 4000 v sym parameter value unit vcc supply voltage 6 v tamin minimum operating ambient temperature 0 o c tamax maximum operating ambient temperature +70 o c tstgmin minimum storage temperature -65 o c tstgmax maximum stor age temperature 150 o c tj junction temperature 150 o c this device contains protec tion circuitry to guard against damage due to high static voltage or electric fields. however, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high impedance circuit. for proper operation, input and output voltages should be constrained to the ranges indicated in the recommended operating conditions. note: maximum ratings are those values beyond which damage to the device may occur. for functional operation, values should be restricted to t he recommended operating condition. note: meets moisture sensitivity level 1, no dry pack required. f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information electrical characteristics 8 electrical characteristics ? a = 100% tested ? b = 100% correlation tested ? c = characterized on samples ? d = design parameter see characterization conditions sec tion for each c type parameter. 8.1 operating conditions unless otherwise stated: v cc =5.0 v, ambient temperture=25 o c, video input 1v p-p , 10-step grayscale. rf output into 75 ohm load. note: specifications only valid for envelope demodulation. table 2. operating conditions parameter min typ max unit notes type operating supply voltage range 4.5 5.0 5.5 v b total supply current 42 50 58 ma all sections active a total standby mode supply current 3 5 7 ma osc=0, so=1, att = 1 bus section active a test pattern sync pulse width 3 4.7 6.5 s b sound comparator charge pump current during locking when locked 7 0.7 10 1 12 1.5 a a a a rf comparator charge pump current 60 100 150 a a crystal oscillator stability-negative resistance 1 - - k ? d logic output port saturation voltage at i = 2 ma leakage current - - 160 - 300 1 mv a a a f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
i2c bit mapping mc44bs374t1/374t1a advance information 9 i 2 c bit mapping write mode bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 ack ca-chip address 1 1 0 0 1 0 1 0 ack c1-high order bits 1 0 so lop ps x3 x2 0 ack c0-low order bits pwc osc att sfd1 sfd0 0 x5 x4 ack fm-high order bits 0 tpen n11 n10 n9 n8 n7 n6 ack fl-low order bits n5 n4 n3 n2 n1 n0 x1 x0 ack read mode bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 ack chip address 1 1 0 0 1 0 1 1 ack r-status byte - - - - - y2 y1 oor - bit name description pwc peak white clip enable / disable osc uhf oscillator on / off att modulator output attenuated- sound and video modulators on / off sfd0, 1 sound subcarrier frequency control bits so sound oscillator on / off lop logic output port ps picture-to-sound carrier ratio tpen test pattern enable-picture and sound x5?x0 test mode bits-all bits are 0 for normal operation (see test mode tables, page 6 & page 7) except ?osc? bit (normal mode is ?1?) n0?n11 uhf frequency programming bits, in steps of 250 khz oor rf oscillator out-of-frequency range information y1, y2 rf oscillator operating range information f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information i2c programming 10 i 2 c programming write mode: test mode 1 and vhf range x2 x1 x0 state description 0 0 0 1.a normal operation 0 0 1 1.b rf frequency divided for low frequency testing or vhf range: rf / 2 0 1 0 1.c rf / 4 0 1 1 1.d rf / 8 1 0 0 1.e rf / 16 1 0 1 1.f dc drive applied to modulators: non-inverted video at tvout 1 1 0 1.g dc drive applied to modulators: inverted video at tvout 1 1 1 1.h transient output inhibit disabled (ie speed up mode) during this speed-up test mode, att=0 forces sound current source to 1 a, and att=1 forces it to 10 a. sound video sfd 1 sfd 0 sound subcarrier freq (mhz) 00 4.5 01 5.5 10 6.0 11 6.5 ps picture-to-sou nd ratio (db) 012 116 so sound oscillator 0 sound oscillator on (normal mode) 1 sound oscillation disabled (oscillator and pll section bias turned off) pwc peak white clip 0 peak white clip on (system b / g) 1 peak white clip off (system l) tpen test pattern signal 0 test pattern signal off (normal operation) 1 test pattern signal on (picture and sound) uhf standby mode logic output port osc uhf oscillator 1 normal operation 0 uhf oscillator disabled (oscillator and pll sections bias turned off) att modulator output attenuation 0 normal operation 1 modulator output attenuation (sound and video modulators sections bias turned off. osc so att combination of 3-bits 0 1 1 modulator standby mode lop description 0 pin 3 is low voltage 1 pin 3 is high impedance f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
i2c programming mc44bs374t1/374t1a advance information write mode: test mode 2 note: test modes 1 and 2 are intended for manufacturing test purposes only and cannot be used for normal applicatio ns, except for vhf range (states 1.b to 1.e). read mode x5 x4 x3 state description 0 0 0 2.a normal operation 0 0 1 2.b test pattern generator dc verification (test pattern dc test mode available) 0 1 0 2.c program divider test (uhf program divider on pllfilt pin and sound program divider on spllfil pin) 0 1 1 2.d reference divider test (uhf reference divider on pllfilt pin) 1 0 0 2.e uhf phase comparison, upper source on pllfilt pin sound phase comparison 10 a upper source on spllfil ( only valid during transient output inhibit. ) 1 0 1 2.f uhf phase comparison, lower source on pllfilt pin sound phase comparison 10 a lower source on spllfil ( only valid during transient output inhibit. ) 1 1 0 2.g sound phase comparison 1 a upper source on spllfil ( not valid during transient output inhibit. ) 1 1 1 2.h sound phase comparison 1 a lower source on spllfil ( not valid during transient output inhibit. ) oor description 0 normal operation, vco in range 1 vco out of range y1 description 0 vco out of range, frequency t oo low, only valid if oor=1 1 vco out of range, frequency too high, only valid if oor=1 y2 description 0 high vco is active 1 low vco is active f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information mc44bs374t1a high frequency characteristics 11 mc44bs374t1a high frequency characteristics unless otherwise stated: v cc =5.0 v, ambient temperture=25 o c, video input 1v p-p , 10-step grayscale. rf inputs / outputs into 75 ohm load. note: specifications only valid for envelope demodulation. table 3. high frequency characteristics parameter test conditions min typ max unit type tvout output level output signal from modulator section see figure 3 . see note 2 79 82 85 db v b uhf oscillator frequency 460 - 880 mhz a vhf range from uhf oscillator internally divided 45 - 460 mhz b tvout output attenuation during transient output inhibit, or when att bit is set to 1. see figure 3 . see note 2 65 75 - dbc b sound subcarrier harmonics (fp + n ? fs) reference picture carrier. see note 2 50 63 - dbc c second harmonic of chroma subcarrier using red ebu bar. see note 2 45 70 - dbc c chroma / sound intermodulation: fp + ( fsnd - fchr ) using red ebu bar.see note 2 65 82 - dbc c fo (picture ca rrier) harmonics 2nd harmonic: ch21 3rd harmonic: ch21 other channels: see figure 3 . see note 1. see note 2 - - 38 58 50 70 db v c out band (picture carrier) spurious 1 / 2 ? fo - 1 / 4 ? fo - 3 / 2 ? fo - 3 / 4 ? fo from 40 mhz to 1 ghz. see note 2 - - 10 db v c in band spurious (fo @ 5 mhz) no video sound modulation.see note 2 65 75 - dbc c note: 1: picture carrier harmonics are highly dependant on pcb layout and decoupling capacitors. note: 2: see ?characterization meas urement conditions? on page 15. f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1 high frequency characteristics mc44bs374t1/374t1a advance information figure 3. typical high frequency performance 12 mc44bs374t1 high frequency characteristics unless otherwise stated: v cc =5.0 v, ambient temperture=25 o c, video input 1v p-p , 10-step grayscale. rf inputs / outputs into 75 ohm load. note: specifications only valid for envelope demodulation. table 4. high frequency characteristics parameter test conditions min typ max unit type tvout output level for mc44bs374t1a output signal from modulator section see figure 3 . see note 2 75 db v b uhf oscillator frequency 460 - 880 mhz a vhf range from uhf oscillator internally divided 45 - 460 mhz b tvout output attenuation during transient output inhibit, or when att bit is set to 1. see figure 3 . see note 2 65 - dbc b tv output level 77 79 81 83 85 87 4 71 52 1 571 6 2 1 6 71 72 1 771 8 2 1 8 71 frequency (mhz) dbuv tv output attenuation 55 60 65 70 75 80 85 4 71 52 1 571 6 2 1 6 71 72 1 771 8 2 1 8 71 frequency (mhz) dbc 3fo harm onics 35 40 45 50 55 60 65 70 75 471 521 571 621 671 721 771 821 871 frequency (mhz) dbuv 2fo harm onics 35 40 45 50 55 60 65 70 75 4 71 52 1 571 6 2 1 6 71 72 1 771 8 2 1 8 71 frequency (mhz) dbuv maximum specification minimum specification maximum specification maximum specification minimum specification typical typical typical typical f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information mc44bs374t1 high frequency characteristics figure 4. typical high frequency performance sound subcarrier harmonics (fp + n ? fs) reference picture carrier. see note 2 50 63 - dbc c second harmonic of chroma subcarrier using red ebu bar. see note 2 45 70 - dbc c chroma / sound intermodulation: fp + ( fsnd - fchr ) using red ebu bar.see note 2 65 82 - dbc c fo (picture ca rrier) harmonics 2nd harmonic: ch21 3rd harmonic: ch21 other channels: see figure 3 . see note 1. see note 2 - - 32 52 46 64 db v c out band (picture carrier) spurious 1 / 2 ? fo - 1 / 4 ? fo - 3 / 2 ? fo - 3 / 4 ? fo from 40 mhz to 1 ghz. see note 2 - - 4 db v c in band spurious (fo @ 5 mhz) no video sound modulation.see note 2 65 75 - dbc c note: 1: picture carrier harmonics are highly dependant on pcb layout and decoupling capacitors. note: 2: see ?characterization meas urement conditions? on page 15. table 4. high frequency characteristics parameter test conditio ns min typ max unit type tv output level 77 79 81 83 85 87 4 71 52 1 571 6 2 1 6 71 72 1 771 8 2 1 8 71 frequency (mhz) dbuv tv output attenuation 55 60 65 70 75 80 85 4 71 52 1 571 6 2 1 6 71 72 1 771 8 2 1 8 71 frequency (mhz) dbc 3fo harm onics 35 40 45 50 55 60 65 70 75 471 521 571 621 671 721 771 821 871 frequency (mhz) dbuv 2fo harm onics 35 40 45 50 55 60 65 70 75 4 71 52 1 571 6 2 1 6 71 72 1 771 8 2 1 8 71 frequency (mhz) dbuv maximum specification minimum specification maximum specification maximum specification minimum specification typical typical typical typical f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
video characteristics mc44bs374t1/374t1a advance information 13 video characteristics unless otherwise stated: v cc =5.0 v, ambient temperature=25 o c, video input 1v p-p , 10-step grayscale. rf output into 75 ohm load. note: specifications only valid for envelope demodulation. table 5. video performance characteristics parameter test conditions min typ max unit type video bandwidth reference 0 db at 100 khz, measured at 5 mhz. see note 2 -1.5 -0.8 - db c video input level 75 ohm load - - 1 . 5 vcvbs d video input current - 0.2 1 a a video input impedance 500 - - k ? a peak white clip video modulation depth for video=1.4v cvbs 90.5 94 97.5 % b video s / n for the mc44bs374t1a no sound modulation,100% white video using ccir rec.567 weighting filter see figure 5 . see note 2 53 56 - db c unweighted. see note 2 48 53 - c video s / n for the mc44bs374t1 no sound modulation,100% white video using ccir rec.567 weighting filter see figure 5 . see note 2 53 56 - db c unweighted. see note 2 48 53 - c differential phase ccir test line 330, see note 2 - 5 - 5 deg c differential gain ccir test line 330, see note 2 - 5 - 5 % c luma / sync ratio input ratio 7 . 0 : 3 . 0 6.8 / 3.2 7.0 / 3.0 7.2 / 2.8 - b video modulation depth see figure 5 . see note 2 76 82 88 % b note: 2: see ?characterization meas urement conditions? on page 15. video signal to noise (w ith ccir weighting filter) 48 50 52 54 56 58 60 62 471 521 571 621 671 721 771 821 871 frequency (mhz) db minimum specification typical f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information audio characteristics figure 5. typical video performance 14 audio characteristics unless otherwise stated: v cc =5.0 v, ambient temperture=25 o c, video input 1v p-p , 10-step grayscale. rf inputs / outputs into 75 ohm load. note: specifications only valid for envelope demodulation. table 6. audio performa nce characteristics parameter test conditions min typ max unit type picture-to-sound ratio ps bit set to 0 ps bit set to 1 9 13 12 16 15 19 db b audio modulation depth using specific pre-emphasis circuit, audio input level = 205 mvrms - audio frequency = 1 khz fm modulation : fs = 5.5, 6 or 6.5 mhz 100% modulation = +/-50 khz fm deviation 76 80 84 % b fm modulation : ntsc fs = 4.5 mhz 100% modulation = +/-25 khz fm deviation 76 80 84 % b audio input resistance 45 53 61 k ? a audio frequency response reference 0 db at 1 khz, using specified pre-emphasis circuit, measure from 50 hz to 15 khz depends on loop filter components -2.0 - +2.0 db c audio distortion fm (thd only) at 1 khz, 100% modulation ( 50 khz ) no video - 0.2 0.8 % c audio s / n with sync buzz fm ref 1khz, 50% modulation (+/-25khz) ebu color bars video signal, using ccir 468.2 weighting filter 50 54 - db c note: 2: see ?characterization meas urement conditions? on page 15. pal video modulation depth 74 76 78 80 82 84 86 88 90 4 71 52 1 571 6 2 1 6 71 72 1 771 8 2 1 8 71 frequency (mhz) % typical maximum specification minimum specification f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
characterization measurement conditions mc44bs374t1/374t1a advance information figure 6. typical audio performance 15 characterization measurement conditions the following list shows the mc44bs374t1/374t1a default configuration unless otherwise specified. ? peak white clip enabled ? uhf oscillator on ? sound and video modulators on ? sound subcarrier frequency = 5.5 mhz ? sound oscillator on ? logic output port low ? picture-to-sound carrier ratio = 12 db ? test pattern disabled ? all test mode bits are ?0? ? frequency from channel 21 to 69 rf inputs / output into 75ohm load using a 75 to 50 ohm transformation. video input 1vpp. audio pre-emphasis circuit enabled. fm audio weighted signal to noise 46 48 50 52 54 56 58 4 71 52 1 571 6 2 1 6 71 72 1 771 8 2 1 8 71 frequency (mhz) db typical minimum specification f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information characterization measurement conditions table 7. measurement conditions device and signals set-up measurement set-up tvout output level video: 10 steps grey scale no audio measured picture carrier in db uv with the hp8596e spectrum analyzer using a 75 to 50 ohm transformation, all cables losses and transformation pads having been calibrated. measurement used as a reference for other tests: tvout_ref tvout output attenuation att? bit = 1 no video signal no audio signal measure in dbc picture carrier at att=1 with reference to picture carrier at att=0 sound subcarrier harmonics video: 10 steps grey scale no audio signal measure in dbc second and third sound harmonics levels in reference to picture carrier (tvout_ref). second harmonics of chroma subcarrier no audio video: a 700m vpp 100 khz sinusoidal signal is inserted on the black level of active video area. measure in dbc, in reference to picture carrier (tvout_ref), second harmonic of chroma at channel frequency plus 2 times chroma frequency, resulting in the following spectrum. picture carrier sound carrier sound +5.5mhz fo +11mhz +16.5mhz 2nd harm sound 3rd harm 700mv pk-pk frequency 100khz frequency 100khz 700mvpkpk picture carrier sound chroma 2nd +8.86mhz fo +4.43mhz +5.5mhz harmonic carrier chroma carrier f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
characterization measurement conditions mc44bs374t1/374t1a advance information chroma/sound intermodulation no audio signal video: 700m vpp 100 khz sinusoidal signal inserted on the black level of active video area.this is generated using a rohde & schwarz video generator saf and inserting the required frequency from a rf signal generator. measure in dbc, in reference to picture carrier (tvout_ref), intermodulation product at channel frequency plus the sound carrier frequency (+5,5 mhz) minus the chroma frequency (-4,43 mhz), resulting in the following spectrum. intermodulation product is at the channel frequency +1,07 mhz. picture carrier harmonics no video signal no audio signal measure in dbc, in reference to picture carrier (tvout_ref), second and third harmonic of channel frequency, resulting in the following spectrum . out of band spurious no video signal no audio signal measure in dbuv spurious levels at 0.25, 0.5, 0.75 and 1.5 times channel frequency, resulting in the following spectrum measure from 40mhz to 1ghz . in band spurious no video signal no audio signal measure in dbc, in reference to pi cture carrier (tvout_ref), spurious levels falling into video bandwidth starting from +/-100 khz from the picture carrier up to +/-5mhz. table 7. measurement conditions device and signals set-up measurement set-up 700mv pk-pk frequency 100khz frequency 4.43 mhz 700mvpp picture carrier chroma/sound +1.07mhz fo intermod. sound +4.43mhz +5.5mhz carrier chroma carrier picture carrier 3rd harmonic 3fo fo 2fo 2nd harmonic picture carrier fo*3/2 fo/2 fo/4 fo*3/4 fo spurious f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information characterization measurement conditions video bandwidth no audio video: 600mvpp sinusoidal signal inserted on the black level of active video area. the video signal is demodulated on the spectrum analyzer, and the peak level of the 100khz signal is measured as a reference. the frequency is then swept from 100khz to 5mhz, and then the difference in db from the 100khz reference level is measured. weighted video signal to noise video: 100% white video signal - 1vpk- pk. no audio signal this is measured using a rohde & schwarz amfs uhf demodulator in b/g (using a ccir rec. 567 weighting network, 100khz to 5mhz band with sound trap and envelope detection, and a rohde & schwarz uaf video analyzer. the video analyzer measures the ra tio between the amplitude of the active area of the video signal (700mv) and the noise level in vrms on a video black level which is show below. videos/n is calculated as 20 x log(700 /n) in db. unweighted video signal to noise same as above with ccir filter disabled. same as above. video differential phase video: 5 step grey scale- 1vpk-pk. no audio signal this is measured using a rohde & schwarz amfs uhf demodulator in b/g (using a ccir rec. 567 weighting network, 100khz to 5mhz band with sound trap, and envelope detection, and a rohde & schwarz uaf video analyzer. on line ccir 330, the video analyz er dp measure consists of calculating the difference of the ch roma phase at the black level and the different chroma subcarrier phase angles at each step of the greyscale. the largest po sitive or negative di fference indicates the distortion. the video analyzer method takes the worst step from the first 4 steps. table 7. measurement conditions device and signals set-up measurement set-up n noise level in vrms diff phase = * 100% the phase at position 0 the largest positive or negative difference f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
characterization measurement conditions mc44bs374t1/374t1a advance information video differential gain video: 5 step grey scale- 1vpk-pk. no audio signal this is measured using a rohde & schwarz amfs uhf demodulator in b/g (using a ccir rec. 567 weighting network, 100khz to 5mhz band with sound trap and envelope detection, and a rohde & schwarz uaf video analyzer. on line ccir 330 shown below, the video analyzer dg measure consists of calculating the differen ce of the chroma amplitude at the black level and the different amplit udes at each step of the greyscale. the largest positive or negative diff erence indicates the distortion. the video analyzer method takes the worst step from the first 4 steps. video modulation depth no audio signal video: 10 step grey scale this is measured using a hp8596e spectrum analyzer with a tv trigger option, allowing demodulation and triggering on any specified tv line. the analyzer is centred on the maximum peak of the video signal and reduced to zero hertz span in linear mode to demodulate the video carrier . the modulation depth is calculated as (a-b)/a x 100 in% picture to sound ratio no video signal no audio signal ps? bit set to 0 and 1 measure in dbc sound carrier in reference to picture carrier (tvout_ref) for ps? bit=0 (ps=12db typical) and for ps? bit=1 (ps=16db) , table 7. measurement conditions device and signals set-up measurement set-up 0 1 2 3 4 5 5-step greyscale w ith chroma subcarri er superimposed (not to scale), line ccir 330. diff gain = * 100% the amplitude at position 0 the largest positive or negative difference a ( 6-10mv) b (0.6 - 3mv) tv line demodulated by spectrum analyzer-bg standard a(mv) b(mv) picture carrier sound carrier +5.5mhz fo f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information characterization measurement conditions audio modulation depth video black level audio signal: 1khz, 205mvrms. this is measured using a rohde & schwarz amfs demodulator in b/g and a hp8903a audio analyzer at 1khz the audio signal 205mv at 1khz is supplied by the audio analyzer, and the fm demodulated signal deviation is indicated on the demodulator in khz peak. this value is then converted in% of fm deviation, based on specified standards. audio frequency response video black level audio signal: 50hz to 15khz, 100mv rms this is measured using a rohde & schwarz amfs demodulator in b/g and a hp8903a. the audio signal 1khz 100mv rms is supplied by the audio analyzer, demodulated by the demodulator and the audio analyzer measures the ac amplitude of this demodulated audio signal: this value is taken as a reference (0db). the audio signal is then swept fr om 50hz to 15khz, and demodulated ac amplitude is measured in db relative to the 1khz reference. audio pre-emphasis and de-emphasis circuits are engaged, all audio analyzer filters are switched off. audio distortion fm audio: 1khz, adjustable level video black level this is measured using a rohde & schwarz amfs uhf demodulator in b/g and a hp8903a audio analyzer at 1khz. the output level of the audio analyzer is varied to obtain a deviation of 50khz indicated on the demodulator. the input arms detector of the audio analyzer converts the ac level of the combined signal + noise + distortion to dc. it then removes the fundamental signal (1khz) after having measured the frequency. the output rms detector converts the residual noise + distortion to dc. the dc voltmeter measures both dc signals and calculates the ratio in% of the two signals. audio signal to noise audio: 1khz, adjustable level video: ebu color bars this is measured using a rohde & schwarz amfs demodulator in b/g and a hp8903a audio analyzer at 1khz. the output level of the audio analyzer is varied to obtain a modulation deviation of 25khz indicated on the amfs demodulator. the audio analyzer alternately turns on and off it's internal audio source to make a measure of the audio signal plus noise and then another measure of only the noise. the measurement is made using the internal ccir468-2 filter of the audio analyzer together with the in ternal 30+/-2khz (60db/decade) lowpass filters. the amfs demodulator uses a quasi-parallel demodulation as is the case in a normal tv set. in this mode the nyquist filter is bypassed and the video carrier is used without added delay to effectuate intercarrier conversion. in this mode the phase noise information fully cancels out and the true s/n can be measured. table 7. measurement conditions device and signals set-up measurement set-up a dist distorsion noise + () distorsion noise signal ++ () ? = asn db () 20 signal noise + () noise () ? log = f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
modes of operation mc44bs374t1/374t1a advance information 16 modes of operation 16.1 power on settings at power-on, the mc44bs374t1/374t1a is configured as follows: 16.2 power supply the three device vccs (pins 10, 13 and 15) must be ap plied at the same time to en sure all internal blocks are correctly biased. do not bias any other pin before vcc is applied to the mc44bs374t1/374t1a. when all vccs are switched to 0v, s da and scl pins are high impedance. 16.3 standby modes during standby mode, the modulator is switched to low power consumptio n. that is, the sound oscillator, uhf oscillator, and the video and sound modulato r section?s bias are internally turned off. the i 2 c bus section remains active. the mc44bs374t1/374t1a can be set to standby mode with a combination of 3 bits: osc=0, so=1 and att=1 16.4 transient output inhibit to minimize the risk of interference to other chan nels while the uhf pll is acquiring a lock on the desired frequency, the sound and video modulators are turned off during a time out period for each of the following two cases: ? power-on from zero ( i.e., all vcc is switched from 0 v to 5 v ). ? uhf oscillator power-on from off state ( i.e., osc bit is switched from 1 to 0 ) there is a time-out of 263ms until th e output is enabled. this lets the uhf pll settle to its programmed frequency. during the 263m s time-out, the sound pll current source is set to 10 a typical to speed up the locking time. after the 263ms time-out, the current source is switched to 1 a. use care when selecting loop filter components, to ensure the loop transient does not exceed this delay. table 8. power on settings write mode bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 ack c1-high order bits 1 0 0 0 0 0 0 0 ack c0-low order bits 0 1 0 0 1 0 0 0 ack fm-high order bits 0 0 n11 n10 n9 n8 n7 n6 ack fl-low order bits n5 n4 n3 n2 n1 n0 0 0 ack note: n0 to n11 are set to have uhf oscillator on channel 71 ( 871.25 mhz ). note: peak white clip is on. note: sound frequency is 5.5 mhz. note: logic output port is low voltage note: picture to sound ratio is 12 db. f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information modes of operation for test purposes, it is possible to disable the 263ms delay using test mode 1-state 1.h (this is called speed up mode). 16.5 uhf oscillator-vhf range the uhf oscillator is fully in tegrated and does not requir e any external components. for low frequency testing or vhf range operation ( test mode 1, states 1.b to 1.e ), the uhf oscillator can be internally divided by: 2, 4, 8, or 16. 16.6 uhf pll section the reference divider is a fixed divide-by-12 8, resulting in a reference frequency of 31 . 25 khz with a 4 . 0 mhz crystal. the prescaler is a fixed divide-by-8 and is permanently engaged. the programmable divider division-ratio is controlled by the state of control bits n0 to n11. the divider-ratio n for a desired fre quency f (in mhz) is given by: with: note: programming a division-ratio n=0 is not allowed. 16.7 logic output port (lop) the lop pin controls any logic function. the primary ap plications for the lop are to control an external attenuator or an external switch, between the antenn a input and tv output. a typical attenuator application with pin diode is shown in figure 7 . the lop pin switches the pin attenuator depending on the signal strength of the antenna inpu t. this reduces the risks of intermodula tion in certain areas. the lop can also be used as an off position bypass switch or for other logic functions in the application. figure 7. typical attenuator application with pin diode n f 8 --- 128 4 -------- - = n 2048 n 11 1024 n 10 4 n 2 2 n 1 n 0 + ++++ = lop pin vcc tv out antenna input f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
modes of operation mc44bs374t1/374t1a advance information 16.8 video sectio n - peak white clip the mc44bs374t1/374t1a requires the following for proper video functionality: ? a composite video input with negative going sync pulses ? a nominal level of 1 vpp this signal is ac-coupled to the video input where the sync tip level is clamped. the video signal is then passed to a peak white c lip (pwc) circuit. the pwc circuit function soft-clips the top of the video waveform, if the sync tip amplit ude to peak white clip goes too high. this avoids carrier over-modulation by the video. c lipping can be disabled by software. 16.9 test pattern generator the i 2 c generates a simple test pattern, which can be swit ched under bus control to permit a tv receiver to easily tune to the modulator output. the pattern consists of two white vertical bars on a black background and a 976 hz audio test signal. figure 8. test pattern generator 10 20 30 40 50 60 0 64 te1 24 28 44 time in s. 7/10 3/10 te2 f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information modes of operation 16.10 sound section the oscillator is fully integrated and does not require any external comp onents. an internal low-pass filter and matched structure provide very low harmonics levels. the sound modulator system consists of an fm modulator incorpor ating the sound subcarrier oscillator. the audio input signal is ac-coupled into the amplifier, which then drives the modulator. the audio pre- emphasis circuit is a hi gh-pass filter with an external cap acitor and an internal resistor ( 106 k ohms typical ). the recommended capacitor value for bg standard (with a time constant of 50 s) is 470 pf. the recommended capacitor value for m/n standard (with a time constant of 75 s) is 750 pf. to increase the audio bandwidth at low frequencies it is possible to change the sound pll loop filter. the recommended values are 220 nf and 22 nf. to incre ase the bandwidth at low frequencies (lower than 50 hz) it is possible to use larger loop filter capacitor valu es. this will give a lower cut off frequency. in this case it is necessary to calculate the ne w values of the loop filter according to the required q factor and loop bandwidth. this is described in the following figure: figure 9. sound pll loop filter calculation sound pll loop filter calculation loop filter equation : 1 * * c n kosc kpd o = , o c r q * 1 * 1 = , with : ? o = 3db cut off frequency ? kpd = 1ua : phase detector current ? kosc = 5mhz/v : sound oscillator slope (in fact kosc=40mhz/prescaler divider =8) this gives 5 mhz/v ? n = sound divider ratio ? q = quality factor c2, added to minimize glitches, is usually set to one tenth the size of c1. example : fref=31.25khz ? n=5.5mhz / 31.25khz = 176 assuming c1= 220 nf, then o = 360 rad, and fo= 57hz q depends on the desired frequency response ; choosing q = 0.7 as a starting point, then r= 18 k ? . the resistance acts directly on the factor quality and can be adjusted to create peaking on the low frequency range. it is recommended to adjust the value of r experimentally depending on the application and requirements. in the propose d application schematic a value of 15 k ? has been chosen. f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
high speed i2c compatible bus mc44bs374t1/374t1a advance information 17 high speed i 2 c compatible bus 17.1 specific ation conditions unless otherwise specified, vcc = 5.0 v, ta = 25 o c. 17.2 timing definitions figure 10. ssda/sscl timing electrical characteristics symbol min typ max unit type sda / scl output current at 0 v -5 -2 - a a sda / scl low input level v il - - 1.5 v b sda / scl high input level v ih 2.1 - - v b sda/scl input current for input level from 0.4v to 0.3vcc - 5 - 5 a c sda/scl input level 0 - vcc+0,3 v d sda/scl capacitance - - 10 pf c ack low output level (3 ma sinking current) - - 0.3 v c ack low output level (9 ma sinking current) - - 0.8 v c timing characteristics symbol min typ max unit type bus clock frequency 0 - 800 khz c bus free time between stop and start t buf 200 - - ns c setup time for start condition t su;sta 500 - - ns c hold time for start condition t hd;sta 500 - - ns c data setup time t su;dat 0 - - ns c data hold time t hd;dat 0 - - ns c setup time for stop condition t su;sto 500 - - ns c hold time for stop condition t hd;sto 500 - - ns c acknowledge propagation delay t ack;low - - 300 ns c sda fall time at 3ma sink i and 130pf load - - 50 ns c sda fall time at 3ma sink i and 400pf load - - 80 ns c sda rise time scl fall/rise time - - - - 300 300 ns ns c c pulse width of spikes suppressed by the input filter - - 50 ns c tbuf ssda ... ... ack thd;dat tsu;dat tsu;sto thd;sta tack:low start stop sscl scl sda tsu;sta chip address scl sda thd;sto start stop f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information high speed i2c compatible bus 17.3 level definitions sda/scl high and low levels are designed to be compatible with 0-5v and 0-3.3v sda / scl signals. figure 11. sda/scl levels 17.4 high speed i 2 c compatible bus format figure 12. i 2 c bus timing 17.5 i 2 c write mode format and bus receiver it the bus receiver operates the i 2 c compatible data form at. the chip address ( i 2 c bus ) is as follows. in write mode, each ninth data bit ( bits 9, 18, 27, 36, and 45 ) is an acknowledge bit (ack) during which the mcu sends a logic 1 and the modulator circuit answ ers on the data line by pulling it low. besides the chip address, the circuit needs two or four data bytes for operation. the following sequences of data bytes are the permitted incoming information: table 9. chip address (i 2 c bus) 1 1 0 0 1 0 1 0 (ack) = $ca ( hex ) in write mode table 10. permitted data bytes (incoming information) example 1 sta ca c1 c0 sto example 2 sta ca fm fl sto example 3 sta ca c1 c0 fm fl sto example 4 sta ca fm fl c1 c0 sto note: sta = start condition ca = chip address sda ... 0v vcc vih vil dead band 1 2 3 4 5 6 7 8 9 10 14 11 12 13 45 44 15 19 16 17 18 sta chip address ($ca) ack ack first data byte (c1 or fm) data ack stop scl sda f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
high speed i2c compatible bus mc44bs374t1/374t1a advance information after the chip address, two or four data bytes may be received. ? if three data bytes are receiv ed, the third one is ignored. ? if five or more data bytes are received, the fifth and following ones are ignored, and the last ack pulse is sent at the end of the fourth data byte. the first and third data bytes contain a function bit, which lets the ic distinguish between frequency information and control info rmation. if the function bit is a logic 1, the two following bytes contain control information. the first data byte af ter the chip address, may be byte co or byte fm. the two bytes of frequency information are preceded by a logic 0. 17.6 i 2 c read mode format the chip address ( i 2 c ) is: the incoming information consists of the read mode chip address byte. the device then answers with an ack followed by one byte containing three bits of stat us information. no acknowledge is answered by the modulator after this byte. fm = frequency information, high order bits fl = frequency information, low order bits c1 = control information, high order bits co = control information, low order bits sto = stop condition table 11. chip address (i 2 c read mode) 1 1 0 0 1 0 1 1 (ack) = $cb ( hex ) in read mode table 10. permitted data bytes (incoming information) f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information pin circuit schematics 18 pin circuit schematics figure 13. pin circuit schematics vccd 50 1/2 vccd vccd 25k 1/2 vccd 5k sda scl xtal spllflt ack 11.8k audio 10k prem 50k audio in video 500 tv out vcc 1.5k vcc 25k vcc vcc vcc vcc vcc tvovcc 75 vcc vcc 5k vcc 10k 10k lop vcc pllflt vcc 2k vcc 100 f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
application diagram mc44bs374t1/374t1a advance information 19 application diagram figure 14. proposed application schematic note: 1. cx value depends on crystal characteristics. cx = 27 pf on motorola application board. note: 2. rf pll loop filter components at pin 14 must be as close as possible to vccd at pin 15. note: 3. supply voltage decoupling capacitors must be as close as possible to ground. tvout o 2.2k 22nf 1nf 10nf 47nf vcc o this document contains information on a new product under development. motorola reserves the right to change or discontinue this pr oduct without notice. 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 scl sda 4mhz vcc pre-em o o o gndd vccd pllflt gnd video tvovcc spllflt sda scl lop tvout vcca audio o video lop o 10nf 100nf 220nf 100nf cx 22nf 470pf 75 xtal gnd preem audio 10nf o note 1 15k note 2 note 3 note 3 f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information evaluation board layout and schematic 20 evaluation board layout and schematic 20.1 evaluation board layout figure 15. evaluation board pcb layout f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
evaluation board layout and schematic mc44bs374t1/374t1a advance information 20.2 evaluation board schematic figure 16. evaluation board schematic f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a advance information packaging instructions 21 packaging instructions tape and reel packaging per 12mrh 00360a issue y with the following co nditions applicable for dual in- line sop (soic) package. figure 17. dual in-line sop (soic) component orientation: arrange parts with the pin 1 side closest to the ta pe's round sprocket holes on the tape's trailing edge. 22 marking instructions bar marked part way across pin 1 end of package. bar width 10 to 20 mils, length to be at least four times bar width. bar placement may extend across chamfer and dimple areas. pin 1 dot or dimple mcbs374t1 aw ly w w ? 1st line: mcbs374t1 (part number coded on 9 digits) ? 2nd line: assembly site code aw (2 digits) followed by the wafer lot code l (1 digit), year y (1 digit) and work week ww (2 digits) bar marked part way across pin 1 end of package. bar width 10 to 20 mils, length to be at least four times bar width. bar placement may extend across chamfer and dimple areas. pin 1 dot or dimple mcbs374t1a aw ly w w ? 1st line: mcbs374t1a (part number coded on 10 digits) ? 2nd line: assembly site code aw (2 digits) followed by the wafer lot code l (1 digit), year y (1 digit) and work week ww (2 digits) freescale semiconductor, i freescale semiconductor, inc. for more information on this product, go to: www.freescale.com nc...
23 case outline figure 18. so16nb package dim millimeters inches min max min max a 1.35 1.75 0.054 0.068 a1 0.1 0.25 0.004 0.009 d 9.8 10 0.385 0.393 e 5.8 6.2 0.229 0.244 e1 3.8 4 0.150 0.157 b 0.35 0.49 0.014 0.019 c 0.19 0.25 0.008 0.009 e 1.27 bsc 0.050 bsc l 0.4 1.25 0.016 0.049 h 0.25 0.5 0.010 0.019 q 0 o 7 o 0 o 7 o note: 1. dimensions and tolerances per asme y14.5m, 1994. note: 2. controlling dimension: millimeters. note: 3. dimension d and e1 do not include mold protrusion. note: 4. maximum mold protrusion 0.15 ( 0.006 ) per side. note: 5. dimension b does not include dambar protrusion. allowable dambar protrusion shall be 0.127 ( 0.005 ) total in excess of the b dimension at maximum material condition. f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
mc44bs374t1/374t1a f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .

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