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data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 1 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| features ? pt8a977p/977w works as encoder and pt8a978p/978lw works as decoder five pins for five control functions operating power-supply voltage: 2.5v to 5.0v (977p, 977w, 978p), 2.0v to 5.0v (978lw) auto-power-off if no press on any button in 8s or continuously press on any button over 4 minues press on any button as wake up (977p, 977w) manual-power-off with off button one output pin used for external power control (977p, 977w) on-chip oscillator with an external resistor on-chip reversing amplifiers (978p, 978lw) low operating current few external components needed package: 14-pin dip, 14-pin soic, 16-pin dip and 16-pin soic general description the pta977p (or 977w) and pt8a978p (or 978lw) provide a complete control functions to the remote- controlled toy. the pt8a977p/977w has five input pins corresponding with the five function buttons i.e, forward, backward, rightward, leftward and turbo. the encoding circuit in the pt8a977p/977w sends digital codes to the two output pins so and sc. the digital codes correspond to the definite function buttons or their combinations. the so and sc outputs are used in wireless and infra-red applications respectively. the pt8a978p (or 978lw) has five output pins corresponding with the five actions. the received signals are amplified by the three-stage amplifier, and then the appropriate amplified signals are sampled, fault-tolerantly checked and decoded to control the actions of the remote-controlled toy. there is an internal oscillator in the pt8a977p/977w and 978p/978lw respectively. by adding an external resistor conveniently, the oscillator will be constructed. the oscillator frequency can be adjusted by the external resistor. the relative error between the frequencies of the two on-chip oscillators in the pt8a977p/977w and pt8a978p/978lw must be less than 25%. the auto-power-off function is achieved by an internal counter. the pc output is used to control on/off state of the external power supply. pressing off button can also shut down the power supply. press on any function button will wake up the chip promptly. . o n t r a p. o n t r a p . o n t r a p . o n t r a p. o n t r a pe g a k c a pe g a k c a p e g a k c a p e g a k c a pe g a k c a p p 7 7 9 a 8 t pp i d n i p - 4 1 w 7 7 9 a 8 t pc i o s n i p - 4 1 p 8 7 9 a 8 t pp i d n i p - 6 1 w l 8 7 9 a 8 t pc i o s n i p - 6 1 ordering information .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 2 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| block diagram of 978p/978lw osci osco right turbo forward backward oscillator timing generator decoding circuit latch output circuit signal sample & fault-tolerant amp. amp. amp. si vi1 vi2 vo1 vo2 left ld rd control logic check pin configuration block diagram block diagram of 977p/977w osci osco right left turbo forward backward oscillator input circuit timing generator encoding circuit 4 minutes counter output circuit pc so sc off top view vi2 backward gnd forward turbo 1 2 3 4 5 6 7 14 13 12 11 10 9 8 right left osci osco ld v cc 15 16 rd vo2 si vo1 vi1 pt8a978p/978lw 16-pin dip/16-pin soic off backward gnd forward turbo test sc 1 2 3 4 5 6 7 14 13 12 11 10 9 8 right left osci osco pc v cc so pt8a977p/977w 14-pin dip/14-pin soic .com .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 3 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| pin description of 978p/978lw pin no. 1 2 5 6 4 7 8 3 9 10 11 12 13 14 pin name description 15 16 vi2 vo2 si osci osco ld rd right left backward forward turbo v cc vi1 vo1 gnd input pin for the amplifier 2 output pin for the amplifier 2 input pin of the encoding signal oscillator input pin oscillator output pin with pull-up resistor, leftward function disabled if this pin connected to gnd. with pull-up resistor, rightward function disabled if this pin connected to gnd. rightward output pin leftward output pin backward output pin forward output pin turbo output pin positive power supply input pin for the amplifier 1 output pin for the amplifier 1 negative power supply pin description pin description of 977p/977w pin no. 1 2 5 6 4 7 8 3 9 10 11 12 13 14 pin name off backward gnd forward test turbo sc so v cc pc osco osci left right description with pull-up resistor, this pin is used to shut down the external power supply. with pull-up resistor, backward function selected if this pin connected to gnd. negative power supply with pull-up resistor, forward function selected if this pin connected to gnd. with pull-up resistor, turbo function selected if this pin connected to gnd. with pull-up resistor, leftward function selected if this pin connected to gnd. with pull-up resistor, rightward function selected if this pin connected to gnd. with pull-up resistor, this pin is used for testing mode. output pin of the encoding signal with carrier frequency output pin of the encoding signal without carrier frequency positive power supply power control output pin oscillator output pin oscillator input pin .com .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 4 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| code format (w1 is used for function codes, w2 for start codes) word format start code: 4w2 function co de: n w1 1 word encoding and decoding timing w2, w2, w2, w2, (n)xw1, w2, w2, w2, w2, (n)xw1, w2, w2, w2, w2, (n)xw1, w2, w2, w2, w2, (n)xw1, w1 w1: 1khz 50% duty cycle typical w2 w2: 500hz 75% duty cycle typical 1st word 2nd word last word encoding output from pt8a977p/977w 1 2 3 14 15 function codes end codes press any button on pt8a977p/977w 9ms 9ms decoding output from pt8a978p (or 978lw) .com .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 5 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| encoding input and decoding result turbo number of function codes (n) w1 4 10 16 22 28 34 40 46 52 58 64 decoding results end code forward (pulse) forward (high level) forward (high level) & left forward (high level) & right backward backward & right backward & left left right pc output timing of 977p/977w note: pins 1, 4, 5, 6 and 14 are high. 8s 8s v cc off pc pc v cc off v cc press function buttons pc 8s 8s 4 minutes .com .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 6 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| maximum ratings (above which the useful life may be impaired. for user guidelines, not tested) storage temperature ........................................................ -25 o c to +85 o c ambient temperature with power applied ...................... -10 o c to +40 o c supply voltage to ground potential (inputs & v cc only) .... -0.5 to +6.0v supply voltage to ground potential (outputs & d/o only) -0.5 to +6.0v dc input voltage ................................................................ -0.5 to +6.0v dc output current ........................................................................ 20ma power dissipation ....................................................................... 500mw note: stresses greater than those listed under maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other condi- tions above those indicated in the operational sec- tions of this specification is not implied. exposure to absolute maximum rating conditions for ex- tended periods may affect reliability. dc electrical charateristics dc electrical charateristics of 977p/977w note: over the operating rating, 0c t a 70c, v cc = 4v dc electrical charateristics of 978p/978lw 2.5 4.0 5.0 v parameters description test condition min. t ype max. units i cc supply current output unloaded 100 ua v il input low voltage guaranteed logic low level 0.8 v i il input low current -60 ua i oh output high current i ol output low current v out = 3.5 v -1.0 ma v out = 0.5 v 150 ua v cc operating voltage i stb stand-by current off state 5 ua v ih input high voltage guaranteed logic high level 3.0 v i ih input high current pin 1, 4, 5, 6, 13, 14 v ih = 4v, on state 10 ua pin 1, 4, 5, 6, 13, 14 v il = 0v, on state pin 7, 8, 10 pin 11 v out = 3.5 v -200 - 800 ua note : over the operating rating, 0c t a 70c, v cc = 4v pin 6, 7, 10, 11, 12 2.5 4.0 5.0 v parameters description test condition min. t ype max. units i cc supply current output unloaded 1 ma v il input low voltage guaranteed logic low level 0.8 v i il input low current -60 ua i oh output high current i ol output low current v out = 3.5 v -200 - 850 ua pin 1, 5, 15 v out = 0.5 v 200 850 ua v cc operating voltage - 978p i stb stand-by current off state 10 ua v ih input high voltage guaranteed logic high level 3.0 v i ih input high current pin 8, 9 v ih = 4v, on state 10 ua pin 3, 8, 9 v il = 0v, on state pin 1, 5, 15 pin 6, 7, 10, 11, 12 v out = 3.5 v -500 ua v out = 0.5 v 2 ma operating voltage - 978lw 2.0 5.0 v i i input current pin 12 v ih = 0 ~ 4v, on state 10 ua input high current pin 3 v ih = 4v, on state 60 ua i i input current pin 14, 16 v ih = 0 ~ 4v, on state 10 ua .com .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 7 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| ac electrical characteristics ac electrical characteristics of 977p/977w note : over the operating rating, 0c t a 70c, v cc = 4v * the relative error between the frequencies of the two on-chip oscillators in the pt8a977p (or 977w) and pt8a978p (or 978lw) must be less than 25%. ** when adjust the external oscillator resistor, the auto-power-off time will vary relevantly. ac electrical characteristics of 978p/978lw note : over the operating rating, 0c t a 70c, v cc = 4v * the relative error between the frequencies of the two on-chip oscillators in the pt8a977p (or 977w) and pt8a978p (or 978lw) must be less than 25%. parameters description test condition min. type max. units f osc oscillator frequency * t fun cycle time of function code t sta t off cycle time of start code carrier frequency of sc pin time of auto-power-off ** t a = 25c, r = 200 k w 1 0 2 1 2 8 1 5 4 k h z f osc = 102 to 154 khz 0 . 8 1 1 . 2 ms f osc = 102 to 154 khz 1.6 2 2.4 ms f osc = 102 to 154 khz 51 64 77 khz pins 1, 4, 5, 6 and 14 are high. 6 . 4 8 9.6 s f csc any of pins 1, 4, 5, 6 or 14 is low. 3 . 2 4 4.8 min. oscillator frequency fluctuation - 977p/977w t a =25c, v cc = 2.5 ~ 5v 1 5 k h z f max -f min parameters description test condition min. type max. units f osc oscillator frequency * t fun cycle time of function code t sta cycle time of start code f osc = 128 khz 0 . 7 5 1 1 . 2 5 ms f osc = 128 khz 1.5 2 2.5 ms t a = 25c, r = 200 k w 1 0 2 1 2 8 1 5 4 k h z v si si pin receive sensitivity (v pp ) guaranteed effective decoding 300 mv oscillator frequency fluctuation - 978p oscillator frequency fluctuation - 978lw t a =25c, v cc =2.5 ~ 5v 1 5 k h z f max -f min t a =25c, v cc =2.0 ~ 5v 1 0 k h z .com .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 8 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| application circuits typical application of pt8a977p/977w for transmit circuit with 9v battery s1 s2 s3 s4 s6 r7 200k r9 330 c12 .01u c11 4.7u c8 .02u r3 220k l1 2.2u b1 9v r4 6.8k r5 33k c9 68 c3 47 r1 100 c6 .02u l2 2.2u r2 4.7k c4 150 c2 150 c1 100 a1 antenna cr1 27.145 r6 100 c7 68 l4 6.8u s5 v4 4.7v v7 4148 v3 led r10 1k r8 3.9k r12 1om r11 10m l3 rightb 1 testb 2 gnd 3 back 4 for 5 tu rbo b 6 sc 7 so 8 vd d 9 pc 10 osco 11 osci 12 off 13 leftb 14 pt8a977p power off v1 9014 v2 9014 v5 8550 v6 9013 left so v cc pc osco osci off right sc turbo forward backward gnd test .com .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 9 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| typical application of pt8a978p/978lw for receive circuit with five functions v7 9013 v6 8050 v5 8550 v4 8550 v3 8050 v2 9013 vd1 4.2v c14 .01u c13 4.7u c12 100u c11 1000 c10 30 c6 18 c5 .02u c4 4.7u c3 3000 c2 47 v1 c1815 c1 4 a1 c7 .1u c8 470 c9 .1u m1 m2 v1 1 9013 v1 2 8050 v1 3 8550 v1 4 8550 v1 5 8050 v1 0 9013 v8 9013 v9 8550 c16 .02u c17 .02u c15 .01u 9v 12v s1 l1 2.2u l2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 pt8a978p r1 1k r2 180k r3 2.2k r4 2.2m r5 2.2k r6 2.2m r7 2.2k r8 200k r9 330 r10 4.3k r11 10 r12 510 r13 220 r14 220 r15 330 r16 100 r17 100 r18 330 r19 330 r20 100 r21 1k r22 1k r23 1k r24 1k r25 1k c18 100u c19 .1u ld rd backward left forward right turbo osco v cc osci vi1 si vo1 gnd vi2 vo2 9 10 11 12 13 14 15 16 8 7 6 5 4 3 2 1 .com .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 10 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| mechanical diagram of 14-pin soic .com .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 11 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||| mechanical diagram of 16-pin soic .com .com .com .com .com 4 .com u datasheet
data sheet pt8a977p/977w/978p/978lw 5-function remote controller pt0074(10/01) ver:1 12 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| notes pericom technology inc. email: support@pti.com.cn w eb site: ww w .pti.com.cn , www.pti-ic.com
china : no. 20 building, 3/f, 481 guiping road, shanghai, 200233, china tel: (86)-21-6485 0576 fax: (86)-21-6485 2181 asia pacific : unit 1517, 15/f, chevalier commercial centre, 8 wang hoi rd, kowloon bay, hongkong tel: (852)-2243 3660 fax: (852)- 2243 3667 u.s.a. : 2380 bering drive, san jose, california 95131, usa tel: (1)-408-435 0800 fax: (1)-408-435 1100 pericom technology incorporation reserves the right to make changes to its products or specifications at any time, without noti ce, in order to improve design or performance and to supply the best possible product. pericom technology does not assume any responsibility fo r use of any circuitry described other than the circuitry embodied in pericom technology product. the company makes no representations that circuitry described herein is free from patent infringement or other rights, of pericom technology incorporation. .com .com .com .com 4 .com u datasheet

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