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overview the LC7233N-8818 is a single-chip electronic tuning microcontroller that supports control of an electronic tone/volume control ic (the lc7538jmd) and handles detachable front panel products based on the lc75853e/w keyed lcd driver. it is designed for automotive use and incorporates a pll-based receiver that can receive all major worldwide radio transmissions. features supports detachable front panel products. system chips: lc7233n, lc75853e/w and lc7538jmd supports anti-theft led flashing and reminder to remove panel alarm functions. supports control of an electronic tone/volume control ic (the lc7538jmd). functions: bass, treble, balance, fader muting function (with key, out and electronic tone controls) supports two color illumination control (dual systems). reduced lcd display output pin count achieved by operating at 1/3 duty and 1/3 bias drive using the lc75853e/w. up to 36 stations can be stored in preset memory: 6 stations for each band (fm1, fm2, fm3, vf, mw (mw1) and lw (mw2)). previous station function also supported. auto preset memory function radio monitor output: operates during tape ff/rew. cd function (with key, in, and out) tape function (flashing direction display supported when ff and rew signal inputs are provided.) rich selection of double function keys for use with tape players tape character display supports use of electronic power switch. twenty diode matrix settings supports radio reception throughout the world. supports am stereo reception in the usa and japan. package dimensions unit: mm 3159-qfp64e preliminary contents 1. pin assignment ........................................................ 2 2. electrical characteristics .......................................... 3 3. radio reception frequencies ................................... 5 4. key matrix (lc75853e/w), diode matrix (dimrx) ............................................ 6 5. pin functions ............................................................ 7 6. diode matrix (dimrx) select ................................ 9 7. lcd display pattern (1/3 duty, 1/3 bias) ............... 11 8. display examples ................................................... 13 9. key functions ........................................................ 15 10. power connection .................................................. 26 11. state transition diagram ....................................... 26 12. timing .................................................................... 28 13. initial states ............................................................ 34 14. tracking point frequency ...................................... 34 sanyo:qip64e 72895th (ot) no. 4743-1/36 cmos lsi ordering number : en * 4743a LC7233N-8818 sanyo electric co.,ltd. semiconductor bussiness headquarters tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan single-chip pll and controller with lcd driver [LC7233N-8818]
pin assignment specifications absolute maxim um ratings a t t a = 25 c, v ss = 0 v no. 4743- 2 /36 LC7233N-8818 parameter symbol conditions ratings unit maximum supply voltage v dd max ?.3 to +6.5 v input voltage v in 1 hold, stereo, tape, sd, dir, panel in ?.3 to +13 v v in 2 inputs other than v in 1 ?.3 to v dd + 0.3 v output voltage v out 1 beep, amute, aout ?.3 to +15 v v out 2 output other than v out 1 ?.3 to v dd + 0.3 v i out 1 beep, amute 0 to 5 ma i out 2 ce, clk, di, do (lc75853e/w), cdin, dkin, skin, 0 to 3 ma output current ff-rew i out 3 t0, t1, t2, t3, t4, res 0 to 1 ma i out 4 aout 0 to 2 ma allowable power dissipation pd max ta = ?0 to +85 c 400 mw operating temperature topr ?0 to +85 c storage temperature tstg ?5 to +125 c
allo wab le operating rang es a t t a = ?0 to +85 c, v dd = 3.5 to 5.5 v electrical characteristics f or the allo w a b le oper a ting rang es no. 4743- 3 /36 LC7233N-8818 parameter symbol conditions ratings unit min typ max v dd 1 cpu and pll operation 4.5 5.5 v supply voltage v dd 2 cpu operation 3.5 5.5 v v dd 3 memory retained 1.3 5.5 v v ih 1 tape, sd, dir, panel in 0.7 v dd 8.0 v v ih 2 hold 0.8 v dd 8.0 v input high level voltage v ih 3 stereo 2.5 8.0 v v ih 4 k0, k1, k2, k3 0.6 v dd v dd v v ih 5 do (lc75853e/w), cdin, dkin, skin, ff-rew 0.7 v dd v dd v v il 1 tape, sd, dir, panel in 0 0.3 v dd v v il 2 hold 0 0.4 v dd v input low level voltage v il 3 stereo 0 1.3 v v il 4 k0, k1, k2, k3 0 0.2 v dd v v il 5 do (lc75853e/w), cdin, dkin, skin, ff-rew 0 0.3 v dd v f in 1 xin 4.0 4.5 5.0 mhz input frequency f in 2 fmin:v in 2, v dd 1 10 130 mhz f in 3 amin (lw, mw):v in 3, v dd 1 0.5 10 mhz f in 4 hctr:v in 4, v dd 1 0.4 12 mhz v in 1 xin 0.50 1.5 vrms input amplitude v in 2 fmin 0.10 1.5 vrms v in 3 amin 0.10 1.5 vrms v in 4 hctr 0.10 1.5 vrms parameter symbol conditions ratings unit min typ max power down detection voltage v det 2.7 3.0 3.3 v i ih 1 hold, tape, sd, dir, panel in, stereo: 3.0 a vi = 5.5 v i ih 2 xin: v i = v dd = 5.0 v 2.0 5.0 15 a input high level current i ih 3 fmin, amin, hctr: v i = v dd = 5.0 v 4.0 10 30 a i ih 4 k0, k1, k2, k3: v i = v dd = 5.0 v 50 a i ih 5 cdin, dkin, skin, ff-rew, do (lc75853e/w): 3.0 a v i = v dd = 5.0 v i ih 6 ain: v i = v dd 0.01 10 na i il 1 hold, tape, sd, dir, panel in: v i = v ss 3.0 a i il 2 xin: v i = v ss 2.0 5.0 15 a input low level current i il 3 fmin, amin, hctr: v i = v ss 4.0 10 30 a i il 4 cdin, dkin, skin, ff-rew, do (lc75853e/w): 30 a v i = v ss i il 5 ain: v i = v ss 0.01 10 na input floating voltage v if k0, k1, k2, k3 0.05 v dd v pull-down resistance r pd k0, k1, k2, k3: v dd = 5 v 75 100 200 k i offh 1 eo: v o = v dd 0.01 10 na i offh 2 t0, t1, t2, t3, t4, res, cdin, dkin, skin, 3.0 a ff-rew, do (lc75853e/w): v o = v dd output off leakage current i offh 3 beep, amute: v o = 13 v 5.0 a i offl 1 eo: v o = v ss 0.01 10 na i offl 2 t0, t1, t2, t3, t4, res, cdin, dkin, skin, 3.0 a ff-rew, do (lc75853e/w): v o = v ss continued on next page.
continued from preceding page. note: * k0, k1, k2, k3, tape, sd, dir, panel in, do (lc75853e/w) all ports other than those specified above are left open. figure 1 i dd 2 in hold mode no. 4743- 4 /36 LC7233N-8818 parameter symbol conditions ratings unit min typ max v oh 1 t0, t1, t2, t3, t4, res: i o = ? ma v dd ?2.0 v dd ?1.0 v dd ?0.5 v v oh 2 ce, clk, di (lc75853e/w): i o = ? ma v dd ?1.0 v v oh 3 eo: i o = 500 a v dd ?1.0 v v oh 4 xout: i o = 200 a v dd ?1.0 v output high level voltage band1, band2, mode, fmlow, ce, clk, di (lc7538jmd), loud, ifcnt, mo/st, loc, v oh 5 power, cdout, nr1, nr2, mtl, aps, v dd ?1.0 v mute, dkout, ledflsh, t5, t6, t7: i o = ?.1 ma v oh 6 com1, com2: i o = 25 a v dd ?0.75 v dd ?0.5 v dd ?0.3 v v ol 1 t0, t1, t2, t3, t4, res: i o = 50 a 0.5 1.0 2.0 v v ol 2 ce, clk, di (lc75853e/w): i o = 1 ma 1.0 v v ol 3 eo: i o = 500 a 1.0 v v ol 4 xout: i o = 200 a 1.0 v band1, band2, mode, fmlow, ce, clk, output low level voltage di (lc7538jmd), loud, ifcnt, mo/st, loc, v ol 5 power, cdout, nr1, nr2, mtl, aps, 1.0 v mute, dkout, ledflsh, t5, t6, t7: i o = 0.1 ma v ol 6 aout: i o = 0.5 ma, ain = 1.3 v 0.5 v v ol 7 com1, com2: i o = 25 a 0.3 0.5 0.75 v v ol 8 beep, amute: i o = 5 ma 0.75 (150 ) 2.0 (400 ) v output intermediate level voltage v m com1, com2: v dd = 5 v, i o = 20 a 2.0 2.5 3.0 v i dd 1 v dd 1: f in 2 = 130 mhz 15 20 ma i dd 2 v dd 2: (hold mode: see figure 1.) 1.5 ma supply current i dd 3 v dd = 5.5 v, oscillator stopped, ta = 25 c 5 a (backup mode: see figure 2.) i dd 4 v dd = 2.5 v, oscillator stopped, ta = 25 c 1 a (backup mode: see figure 2.)
note: all ports other than those specified above are left open. figure 2 i dd 3 and i dd 4 in backup mode radio reception frequencies note: 1. in europe, the diode matrix shift setting is used for if selection. 2. the step size ?9)?refers to the step size in auto-tuning mode when if counting is not performed. no. 4743- 5 /36 LC7233N-8818 frequency range fref. step if if count diode matrix area band (fm, sw: mhz am: khz) (khz) (khz) fm (mhz) tolerance (1: on 0: off) am (khz) (khz) b2 b1 b0 lw2 lw1 shift fm a 87.5 ?107.9 25 200 10.7 10 0 0 0 0 0 0 u.s.a mw a 530 ?1720 10 10 450 3 fm b 87.5 ?108.0 25 100 10.7 10 0 0 0 1 0 0 mw a 530 ?1720 10 10 450 3 southeast fm c 87.5 ?108.0 25 50 10.7 10 0 0 0 1 1 1 asia mw h 531 ?1629 9 9 450 3 fm c 87.5 ?108.0 25 50 10.7 10 mw c 531 ?1620 9 9 450/459 3 0 1 0 0 0 0/1 lw a 153 ?279 1 1 (9) 10.7 0.6 0 1 450/459 fm d 87.5 ?108.0 12.5 25 10.7 10 mw c 531 ?1620 9 9 450/459 3 1 0 0 0 0 0/1 lw a 153 ?279 1 1 (9) 10.7 0.6 0 1 europe 450/459 fm c 87.5 ?108.0 25 50 10.7 10 mw c 531 ?1620 9 9 450/459 3 0 1 0 0 0 0/1 lw b 146 ?290 1 1 (9) 10.7 0.6 1 0 450/459 fm d 87.5 ?108.0 12.5 25 10.7 10 mw c 531 ?1620 9 9 450/459 3 1 0 0 0 0 0/1 lw b 146 ?290 1 1 (9) 10.7 0.6 1 0 450/459 japan fm e 76.0 ?90.0 25 100 ?0.7 10 1 0 1 0 0 0 mw e 522 ?1629 9 9 450 3 saudi arabia fm b 87.5 108.0 25 100 10.7 10 1 0 1 0 0 1 mw f 531 ?1602 9 9 450 3 south africa fm f 87.5 108.0 25 100 ?0.7 10 1 0 1 0 1 0 mw g 531 ?1602 9 9 450 3 65.0 74.0 5 30 10.7 10 east europe fm g 87.5 108.0 25 50 10.7 10 1 0 1 1 0 0 mw c 531 ?1620 9 9 450 3
k e y matrix (lc75853e/w) diode matrix (dimrx) momentary switch diode matrix no. 4743- 6 /36 LC7233N-8818 in out ki1 ki2 ki3 ki4 ki5 ks1 m1 m2 m3 m4 m5 mtl dnr aps ks2 m6 loud/rmon mo/st up/t-up down/t-down ks3 band/ill1 power v-sel v-up v-down ks4 ps/amem vf scan up seek up seek down ks5 loc display cd mute k0 k1 k2 k3 s s s s t0 b0 b1 b2 ifshift s s s s t1 fmb0 fmb1 lw1 lw2 s s s s t2 if count0 if count1 colon clock s s s s t3 double function 0 double function 1 double function 2 fm only s s s s t4 fader evr on/off vf autoretune power off clock on s s s s t5 nr c priority power sw vf select s s s s t6 auto500 cd select rmon ff/rew am stereo sel s s s s t7 ?0 db acc off mw2 sel led flash sel alarm sel
pin functions no. 4743- 7 /36 LC7233N-8818 pin name i/o allocation active function handling when unused 1 xin i 2 test2 i 3 pg3 i tape l connect directly to v dd . 4 pg2 i sd h 5 pg1 i dir h/l connect directly to v ss or v dd . 6 pg0 i panel in l connect directly to v ss . 7 ph3 o beep l open (alarm) 8 ph2 o amute l must be used. 9 pf3 o ce h must be used. 10 pf2 o cl h/l must be used. 11 pf1 o di h must be used. 12 pf0 i do h must be used. 13 pe3 i cdin l connect to v ss . 14 pe2 i dkin l connect to v dd . 15 pe1 i skin l connect to v dd . 16 pe0 i ff-rew h connect to v ss . 17 pc1 o res l open 18 pc0 o t4 h open 19 pb3 o t3 h open 20 pb2 o t2 h open 21 pb1 o t1 h open 22 pb0 o t0 h open 23 pa3 i k3 h open 24 pa2 i k2 h open 25 pa1 i k1 h open 26 pa0 i k0 h open 4.5 mhz crystal oscillator connection ground connection tape input detection signal that reports station reception during auto tuning tape direction display: the ?symbol is displayed on a high input, and the ?symbol on a low input. detachable panel in/out detection: low indicates in, high indicates out. a 250 ms chatter rejection period is provided. outputs a 50 ms 4.4 khz pulse when a key is pressed. in vf mode, if the skin signal was high for 25 seconds (checked at approximately 25 ms intervals), this pin outputs an alarm signal and the LC7233N-8818 starts an auto up search for a low skin signal when a diode matrix vf select setting of 0 is used. since this pin uses an open drain output circuit, connect a pull-up resistor to this pin. audio mute out. when low, the LC7233N-8818 sends a 79 db?data message to the lc7538jmd. this pin is low when hold is low (clock enabled). connect a pull-up resistor to this pin since it uses an open drain output. connect to the lc75853e/w ce pin. connect to the lc75853e/w clock pin. connect to the lc75853e/w di pin. connect to the lc75853e/w do pin. when this pin goes low, the LC7233N-8818 turns on the cd display, switches to cd mode, and sets the cdout pin high. if the cd key is pressed again in this state, the LC7233N-8818 turns off the cd display and sets cdout low. similarly, if the cdin pin goes from low to high, the LC7233N-8818 turns off the cd display and sets cdout low. note that the cd state cannot be switched with only the cd key if cdin is high. the cd has the highest priority, with the total priority order being: cd > tape > radio. in products for the european market, when the LC7233N-8818 is in vf mode and either tape or cd mode, the LC7233N-8818 will switch to radio mode allowing ari broadcasts to be received if a low level is input to this pin (more precisely, if this signal is low three times in a row at 25 ms intervals). also, after an sk seek, 250 ms after skin is determined to be low the LC7233N-8818 performs a dk determination. if this signal goes low in fm mode with the diode matrix vf select setting set to 1, the sk display is turned on. this does not depend on the on/off state of the key. when the key is pressed the LC7233N-8818 starts a search for a low skin signal. the lc7233n- 8818 checks the signal about 375 to 500 ms after an sd is determined to exist, and if low, that channel is held. thereafter, if a high level continues for 25 seconds (checked every 25 ms) the LC7233N-8818 starts an auto-retune operation. the LC7233N-8818 checks the skin signals in m1 to m6, skipping over channels with high skin signals and stopping at the first channel with a low skin signal. if this pin goes high when the LC7233N-8818 is in tape mode, the LC7233N-8818 switches to radio monitor mode. also at this time, the currently displayed scan display flashes at a 1 hz rate. the LC7233N-8818 remains in tape mode while this pin is low. connected to the lc75853e/w res pin diode scan out diode scan out diode scan out diode scan out diode scan out diode scan in diode scan in diode scan in diode scan in vf vf continued on next page.
continued from preceding page. no. 4743- 8 /36 LC7233N-8818 pin name i/o allocation active function handling when unused 27 s23 o t5 h open 28 s22 o t6 h open 29 s21 o t7 h open 30 s20 o ledflsh h open 31 s19 o dkout h open 32 s18 o mute h open 33 s17 o aps h open 34 s16 o mtl h open 35 s15 o nr2 h open 36 s14 o nr1 h open 37 s13 o cdout h open 38 s12 o power h open 39 s11 o loc h open 40 s10 o mo/st h open 41 s9 o ifcnt h open 42 s8 o loud h open 43 s7 o di h open 44 s6 o cl h/l open 45 s5 o ce h open 46 s4 o fmlow h open 47 s3 o mode h/l open 48 s2 o band2 h/l must be used. 49 s1 o band1 h/l 50 com2 o 51 com1 o diode scan out diode scan out diode scan out outputs a high level for 0.25 second and a low level for 0.75 second when panel in goes high. however, the LC7233N-8818 only performs this operation when the diode matrix led flash setting is 0. outputs a high level when dkin goes low. inverted by the mute key. when high, the volume level display flashes at a 1 hz rate. valid when hold is high and main power is on. in tape mode, outputs a high level when the aps display is lit, and a low level when that display is off. valid when hold is high and main power is on. in tape mode, outputs a high level when the mtl display is lit, and a low level when that display is off. valid when hold is high and main power is on. in tape mode when the diode matrix nr setting is 1 (i.e., when dnr- c is selected), outputs a high level when the dnr display and the c in the preset ch digit are lit, and a low level when that display is off. valid when hold is high and main power is on. in tape mode, outputs a high level when the dnr display and the b in the preset ch digit are lit, and a low level when that display is off. valid when hold is high and main power is on. cd source switch (see the cdin pin description.) outputs a high level when the power is on (when the diode matrix power sw setting is 1 and the key is on). outputs low when power is off. in radio mode when the loc display is lit, outputs a high level only during seek or scan when a seek or scan is started. outputs low when display is off. valid when hold is high and main power is on. in radio mode during fm reception (including vf and radio monitor), outputs a low level when the st display is lit, and a high level when that display is off. however, note that this output is enabled for the us and japanese mw band when the diode matrix am st sel setting is 0. outputs a low level in other modes, i.e., tape or cd mode, and when hold is low (clock enabled). this signal switches the if counter buffer on and off. outputs a high level only when there is an sd during auto search, otherwise outputs a low level. outputs a high level when the loud display is lit, and a low level when that display is off. valid when hold is high and main power is on. connected to the lc7538jmd data pin. connected to the lc7538jmd clock pin. connected to the lc7538jmd ce pin. outputs a high level when the fm band is from 64.0 to 74.0 mhz, and a low level when the fm band is from 87.5 to 108.0 mhz. outputs a high level in radio mode, including when dk is on, and outputs a low level in tape and cd modes. outputs a low level when hold is low and panel in is high. these signals change as shown in the table below when the band key is pressed. note: 0 = low, 1 = high these pins are left open in normal operation. power band band1 band2 note mw 0 0 including tape and cd modes lw 0 1 fm 1 0 vf 1 1 including times when dk is on continued on next page.
continued from preceding page. diode matrix (dimrx) select 0: without diode, 1: with diode no. 4743- 9 /36 LC7233N-8818 pin name i/o allocation active function handling when unused 52 hold i hold l must be used. 53 adi i v ss connect directly to v ss . 54 hctr i hctr connect directly to v ss . 55 sns i stereo l connect directly to v dd . 56 v dd 57 fmin i connect directly to v ss . 58 amin i connect directly to v ss . 59 v ss 60 eo o must be used. 61 ain i connect directly to v ss . 62 aout o connect directly to v ss . 63 test1 i 64 xout o detects the external power switch on/off state. when hold goes from high to low: when the clock is enabled: the oscillator is not stopped and the clock continues to count. (hold mode; i dd = 1.5 ma typ) when the clock is disabled (when the diode matrix led flash setting is 1): the oscillator is stopped and the LC7233N-8818 enters low power mode. (backup mode; i dd = 5 a max) connected to v ss . inputs the fmif and amif signals. input an ac coupled signal of 100 mv rms or over. see the description of the diode matrix ifcount0 and ifcount1 settings. tolerance: fm 10 khz, mw 3 hz, lw 0.6 khz when hold is high, the display is turned on 500 ms after a low level input in radio mode (fm or vf) only. display starts 500 ms after hold goes from low to high. however, this function is also enabled in mw mode in products for the us and japanese markets when the diode matrix am st sel setting is 1. +5 v input fm local oscillator input input an ac coupled signal of 100 mvrms or over. am local oscillator input input an ac coupled signal of 100 mvrms or over. connected to ground. phase comparator output: connected to the lpf input. lpf amplifier input lpf amplifier output connected to ground. 4.5 mhz crystal oscillator connection diode matrix on/ function name off clock function enabled. 0 12 hr: usa, japan, saudi arabia, south africa, southeast asia clock 24 hr: europe, east europe 1 clock function disabled. 0 cd function disabled. cdin disabled. the cdout pin outputs a low level. connect cdin to v dd . cd select 1 cd function enabled. when cdin is low cdout will be high, and when cdin is high cdout will be low. the cd key is also enabled. (see the item on the cdin pin.) b0 b1 b2 see the reception frequency table. ifshift lw1 lw2 fmb1 fmb0 number of preset fm stations fmb0 0 0 fm1, fm2, fm3 (18 stations) fmb1 0 1 fm1, fm2 (12 stations) 1 0 fm1 (6 stations) 1 1 illegal value 0 the fm, mw, and lw bands are enabled. fm only 1 only the fm band is enabled. the band key is disabled. the number of fm bands depends on the diode matrix fmb0 and fmb1 settings. continued on next page.
continued from preceding page. 0: without diode, 1: with diode note: * the seek for a manual up or down jumps in 9 khz steps. no. 4743- 10 /36 LC7233N-8818 diode matrix on/ function name off 0 dnr c is disabled. the nr key switches noise reduction between off and nr b. dnr is displayed. dnr c is enabled. the nr key switches noise reduction from off to nr b to nr c to off. nr c 1 the mode is displayed in digit 5. power sw 0 the power is turned on and off using the hold pin. see section 9, "power connection examples." 1 the power is turned on and off using the power key. see section 9, "power connection examples." priority 0 clock display takes priority. when the clock function is enabled (the diode matrix clock setting is 0). 1 frequency, tape, or cd display takes priority. ifcount1 ifcount0 enabled/ hctr pin note disabled ifcount0 0 0 enabled fmif/amif for use with fmif/amif single pin tuner ics. ifcount1 0 1 enabled fmif only 1 0 enabled amif only 1 1 disabled connected to gnd. lw seek is performed in 9 khz steps. * colon 0 the clock colon display is always lit. 1 the clock colon display flashes at 1 hz. vf 0 in vf mode, the LC7233N-8818 retunes if skin is high continuously for 25 seconds. however, note that an alarm is output. autoretune 1 in vf mode, the LC7233N-8818 does not retune even if skin is high continuously for 25 seconds. note that no alarm is output. vf select 0 vf mode disabled. 1 vf mode enabled. power off 0 the clock is not displayed when the main power is turned off. clock on 1 the clock is always displayed when the main power is turned off. evr on/off 0 an electronic volume function is built in. 1 an electronic volume function is not built in. nor is it displayed. 0 a fader function is built in. the v-sel key switches the fader as follows. fader 1 no fader function is built in. m1, m2, and m3 can be independently selected with the radio mode and tape mode double function keys as shown in the table below . a ?entry indicates that there is no double function. double function 0 function 1 function 2 0 the LC7233N-8818 switches to radio monitor mode regardless of the state of the radio monitor key when a high level is input to rmon the ff-rew pin. the rmon display flashes at a 1 hz rate. ff/rew 1 the LC7233N-8818 switches to radio monitor mode when the rmon key is on, the rmon display is lit, and a high level is input to the ff-rew pin. the rmon display flashes at a 1 hz rate. invalid when the rmon display is off. 0 the up/down keys perform manual up/down tuning operations. auto500 1 the up/down keys function as t-up/t-down keys. if one of these keys is pressed for less than 500 ms, a manual tuning operation is performed, and if pressed for more than 500 ms, a seek tuning operation is performed. key on off nr b nr c display (digit 1) off ?nr ?nr pin nr1 l h l nr2 l l h function2 function1 function0 m1 m2 m3 0 0 0 0 0 1 mtl 0 1 0 nr 0 1 1 mtl nr 1 0 0 aps 1 0 1 mtl aps 1 1 0 nr aps 1 1 1 mtl nr aps volume bass treble balance fader volume bass treble balance continued on next page.
continued from preceding page. 0: without diode, 1: with diode lcd displa y p attern (1/3 duty , 1/3 bias) 1. digit position no. 4743- 11 /36 LC7233N-8818 diode matrix on/ function name off am st sel 0 the mo/st key is disabled in the mw band when japan or usa is selected. 1 the mo/st key is enabled in the mw band when japan or usa is selected. 0 when the mute key is pressed and the mute output goes high, a ?9 db data item is sent to the electronic volume control ic. ?0 db 1 when the mute key is pressed and the mute output goes high, a data item for only ?0 db less than the current volume is sent to the electronic volume control ic. 0 when the LC7233N-8818 enters the acc off state (when hold is low) a panel removal reminder alarm is not output from the alarm pin. when the LC7233N-8818 enters the acc off state (hold is low) a panel removal reminder alarm will be output from the alarm pin. the alarm signal frequency is about 4.4 khz, and lasts for about 20 seconds. acc off alarm sel 1 0 there is no mw2 band, and only the mw band is displayed. mw2 sel 1 when there is no lw band, the mw2 band is added, and these bands are referred to as mw1 and mw2. the display for mw1 is ?w i? and the display for mw2 is ?w ii? 0 a pulse (high for 250 ms, low for 750 ms) is output from the ledflsh pin in the acc off state (hold is low) when panel in led flash is high. 1 the ledflsh pin remains low when the LC7233N-8818 enters the acc off state (when hold goes low) and panel in is high. at this time the LC7233N-8818 enters backup mode if the clock function is disabled.
lc75853 lcd pattern layout note: 1. i(l) refers to the left side. i(r) refers to the right side. 2. it is possible to display only the mw segment when only mw1 is enabled. 3. c2 is shared between the clock colon and the frequency dp. 4. r is shared between the rear and light displays. 2. segment pattern no. 4743- 12 /36 LC7233N-8818 com3 com2 com1 s14 i ii fm s15 i (l) * 1 i (r) * 1 mw * 2 s16 st lw s17 rmon vf loc s18 1bc f sk s19 2f 2e 2d s20 2h 2g 2i s21 2a 2b 2c s22 3f 3e 3d s23 c1 3g 3i s24 3a 3b 3c s25 4f 4e 4d s26 4h 4g 4i s27 4a 4b 4c s28 5f 5e 5d s29 c2 * 3 5g r * 4 s30 5a 5b 5c s31 l +, s32 am pm loud s33 6f 6e 6d s34 ch 6g s35 6a 6b 6c s36 dnr aps s37 l10 l11 metal s38 l7 l8 l9 s39 l4 l5 l6 s40 l1 l2 l3
3. common pattern displa y examples 1. tape 2. volume 3. balance no. 4743- 13 /36 LC7233N-8818
4. bass 5. treble 6. fader 7. cd 8. fm vf no. 4743- 14 /36 LC7233N-8818
9. mw 10. clock (12 hrs) 11. clock (24 hrs) k e y functions 1. m1 to m6 radio mode in radio mode, these keys are used for writing to and reading from preset memory. when one of the m1 to m6 keys is pressed, if it is released within 1.5 seconds, then the corresponding memory contents are recalled. if it is held down for over 1.5 seconds, then the currently displayed frequency is stored in the corresponding memory. tape mode in tape mode, the m1, m2, and m3 keys function as tape control keys. the function of these double function keys can be selected by changing diode matrix settings. vf mode in vf mode, the m1 to m6 keys have tuning functions during tape and radio operation. no. 4743- 15 /36 LC7233N-8818
2. up/t-up, down/t-down when the diode matrix auto500 setting is 0. each time one of these tuning keys is pressed the frequency is increased or decreased by one step. if a tuning key is held down for over 500 ms, the frequency is advanced rapidly at about 70 ms per step. when the frequency changes from band edge to band edge, the LC7233N-8818 pauses for about 500 ms. when the diode matrix auto500 setting is 1. when these keys are held down for less than 500 ms they function as manual tuning keys, and when held down for over 500 ms, the LC7233N-8818 enters seek mode. both of these functions are valid when hold is high, panel in is low and main power is on. in vf mode, these keys function as seek up and seek down keys. 3. display + up/t-up when the time is displayed, pressing these keys at the same time adjusts the minutes setting. each time these keys are pressed and held down for less than 500 ms the time setting is advanced by one minute, and if they are held down for over 500 ms, the time setting is advanced at eight minutes per second. these operations reset the seconds setting to zero. 4. display + down/t-down when the time is displayed, pressing these keys at the same time adjust the hour setting. each time these keys are pressed the time setting is advanced by one hour, and if they are held down for over 500 ms, the time setting is advanced at four hours per second. the minute and second settings do not change due to this operation. 5. seek up, seek down these keys automatically search for a station broadcast and lock onto the received station. if the scan key is pressed during a seek, the LC7233N-8818 switches to scan mode. therefore, if the scan up key is pressed during a downward seek, an upwards scan is started. also, during a seek up (down), if seek down (up) is pressed, a seek down (up) operation is started. the search mode is cleared by pressing the same key a second time. when the frequency changes from one band edge to another, the LC7233N-8818 pauses for 500 ms. the search speed is 50 ms/step for fm and 70 ms/step for am. these functions are valid when hold is high, panel in is low and main power is on. 6. scan up the scan function automatically searches for the next station, and when a station is found holds that station for 5 seconds (with amute at the high level) and flashes the channel display. pressing this key once more during that interval causes the LC7233N-8818 to hold at that station. if no user action occurs during that 5 second interval, the search resumes. pressing the seek down key during a scan starts a downward seek operation. scan mode is cleared by pressing the scan up key a second time. when the frequency changes from one band edge to another, the LC7233N-8818 pauses for 500 ms. the search speed is 50 ms/step for fm and 70 ms/step for am. this function is valid when hold is high, panel in is low and main power is on. no. 4743- 16 /36 LC7233N-8818
7. band/ill1 this key switches the band as shown below when released within 1.5 seconds. this function is valid when hold is high, panel in is low and main power is on. holding this key down for more than 1.5 seconds inverts the output of the lc75853e/w s1 pin from low to high or from high to low. its initial state is the low level. this function is valid when hold is high, panel in is low and main power is on. 8. vf pressing this key in radio mode switches the LC7233N-8818 to fm band radio mode regardless of which band was previously selected. the vf display is turned on and the band1 and band2 outputs go high. the sd pin is checked 375 ms later (500 ms later if the previous band was the am band) and after another 375 to 500 ms the skin input is checked. if the input was low, the current frequency is held, and if high, an automatic sk station search is started. when the input goes low, that frequency is held. (see the state transition diagram on page 18.) the sk display is lit if skin is low, the mode is fm, and the LC7233N-8818 is set for european reception. note: * the state from the previous band. pressing the vf seek key causes the LC7233N-8818 to perform the operation shown in the table below based on the vf mode and the skin signal state. in tape or cd mode (when vf mode is off), the operation shown in the table below is performed based on the skin and dkin signal states. fm1 (fm2) (fm3) mw lw no. 4743- 17 /36 LC7233N-8818 key display state output state band1 band2 vf vf lit h h off * * when the vf key is when the seek key is when, during a seek, when the vf key is vf skin pressed pressed the seek key for the same pressed during a seek. (vf mode) direction is pressed vf mode is turned on and a normal station search the LC7233N-8818 stops vf mode is turned on and off h an sk station search is started. at the frequency where an sk station search is is started. pressed. started. a normal station search the LC7233N-8818 stops vf mode is turned on and off l vf mode is turned on. is started. at the frequency where an sk station search is pressed. started. vf mode is turned off and on h/l vf mode is turned off. an sk station search is the seek continues. the LC7233N-8818 returns started. to the state prior to entering vf mode. skin dkin operation when vf mode is switched from off to on by pressing the vf mode key in tape or cd mode the LC7233N-8818 displays the frequency and starts an skin signal h h seek up operation. the display reverts to tape or cd when a low level tape mode skin signal frequency is found. if dkin is low, operation a below is cd mode performed. the display remains in tape or cd display mode. if dkin is low, operation a below is performed. l h if the diode matrix vf autoretune setting is 0, a retune operation is tape mode performed if skin had been low for 25 seconds (checked every 25 ms). cd mode the frequencies in m1 to m6 are checked for a high skin signal, and if none is found, a seek up operation is performed. a l l the frequency is displayed and an ari broadcast is started. vf mode
when the radio monitor function is on and vf mode is switched from off to on, the radio monitor function is cleared and operation or is performed. during power on (hold switching from low to high), skin is checked for 25 seconds, and a retune operation is started if it was high. the frequencies in m1 to m6 are checked for a high skin signal, and if none is found, a seek up operation is performed. this function is valid when hold is high, panel in is low and main power is on. vf mode is cleared by pressing the vf or band keys. however, the band key will not work when the tape signal is low, cd mode is on, or the radio monitor function is on. the figure below shows the state transition diagram for vf mode. note: 1. the radio monitor function is cleared at this time. 2. keys are indicated in boxes. 3. when vf mode is switched from on to off the radio monitor function is cleared if it was enabled. no. 4743- 18 /36 LC7233N-8818
9. ps/amem pressing this key for under 2 seconds invokes the preset scan function, and pressing it for over 2 seconds invokes the auto store memory operation. this function is valid when hold is high and main power is on. ps operation pressing this key starts a preset channel search in increasing channel number order starting with the channel following the currently displayed channel number. when no channel number is being displayed, the search starts at channel number 1. if a station is being received, the amute (which is high) is cleared for 5 seconds. the loc/dx switch is set to dx regardless of its current setting state, and the channel number display flashes at a 1 hz rate during the preset channel search. this function is cleared by pressing the ps key a second time. the keys listed below will also clear this functions. ps/amem, seek up, seek down, scan, up, down, m1 to m6, power, band, vf furthermore, it is also cleared by the hold signal going from high to low, or by the LC7233N-8818 entering tape or cd mode. the preset scan direction operates as shown below depending on the diode matrix fmb0, fmb1 and b0 to b2 settings. fm mode mw mode auto memory (amem) operation when this key is held down for over 2 seconds, the LC7233N-8818 starts the auto memory operation. this operation is performed in two cycles, the first in local mode (with the loc pin high) and the second in dx mode (with the loc pin low). the search starts from the low end of the band and stores the stations found in order from m1 to m6. if all memories were not filled in local mode, it proceeds to the second cycle. fm band [fm1, fm2 and fm3 selected] (diode matrix fmb0 and fmb1 set to 0 and 0) : when started from the fm1 band stations are stored from fm1 m1 to fm1 m6 ................. six stations : when started from the fm2 band stations are stored from fm2 m1 to fm2 m6 ................. six stations : when started from the fm3 band stations are stored from fm3 m1 to fm3 m6 ................. six stations [fm1 and fm2 selected] (diode matrix fmb0 and fmb1 set to 1 and 0) : when started from the fm1 band stations are stored from fm1 m1 to fm1 m6 ................. six stations : when started from the fm2 band stations are stored from fm2 m1 to fm2 m6 ................. six stations [only fm1 selected] (diode matrix fmb0 and fmb1 set to 0 and 1) : when started from the fm1 band stations are stored from fm1 m1 to fm1 m6 ................. six stations [vf selected] (diode matrix vf select set to 1) : when started from the vf band stations are stored from vf m1 to vf m6 ......................... six stations mw (1) (mw2) fm1 (fm2) (fm3) no. 4743- 19 /36 LC7233N-8818
mw and lw bands initially the loc pin is set high, and stations are stored in local mode starting at m1. if stations were not stored through m6, the loc pin is set to low, and storing continues in dx mode. when the lw band is not supported, i.e., the diode matrix mw2 sel is set to 1 (bands mw1 and mw2 provided) : when started from the mw1 band stations are stored from mw1 m1 to mw1 m6 ............. six stations : when started from the mw2 band stations are stored from mw2 m1 to mw2 m6 ............ six stations during the auto memory operation, whatever band is selected, the channel number is displayed flashing at a 1 hz rate. when the operation completes, the LC7233N-8818 executes a ps search operation if any stations were stored in memory. if no stations were found, the contents of memory channel m1 are recalled. the following keys will cancel this operation. ps/amem, power, band, vf, cd furthermore, this operation is also cleared by the hold signal going from high to low, or by the lc7233n- 8818 entering tape or cd mode. 10. cd when the cdin signal is low, pressing this key switches the LC7233N-8818 to cd mode. the cd display is lit and the cdout signal is set high. if this key is pressed again cd mode is cleared, the cd display is turned off and cdout is set low. when the hold input is high, this key switches the LC7233N-8818 to cd mode with the highest priority. cd mode is not cleared by switching the hold signal from high to low and back to high again. nor is it cleared by switching the power from on to off and back on again. this operation is valid when hold is high and system power is on. no. 4743- 20 /36 LC7233N-8818 key display state output state cd lit h off l
11. display when the clock function is enabled, i.e, the diode matrix clock setting is 0, this key is used to switch the display with that for the current mode, e.g. between clock and frequency display, clock and tape display, and clock and cd display. this operation is valid when hold is high and main power is on. this operation is valid when hold is high and main power is on or off. 12. loc when this key is pressed in radio mode the loc display is turned on. if the seek key or the scan key is pressed in this state, the loc pin goes high and a local search is performed. when the seek or scan function is cleared the loc pin goes low. (see section timing-4.) this operation is valid when hold is high and main power is on. no. 4743- 21 /36 LC7233N-8818 mode dimrx ?riority?= 0 (clock display takes priority) dimrx ?riority?= 1 display clock display frequency display clock display display off after 5 seconds frequency display * radio key five seconds after operation complete radio * key ps/amem , seek up , seek down , scan , up , down m1?6 , power , band , vf , loc display clock display tape display clock display display off after 5 seconds ?during tape input, tape display is performed for 5 seconds. display clock display cd display clock display display off after 5 seconds ?during cd input, cd display is performed for 5 seconds. frequency display tape or cd display after 5 seconds clock display dk on after 5 seconds skin = ? dk off sk search display clock display frequency display display off after 5 seconds frequency display however, note that if a radio key is pressed during clock display, the LC7233N-8818 returns to frequency display even if the 5 seconds have not elapsed. display clock display display off after 5 seconds tape display tape display display clock display display off after 5 seconds cd display cd display frequency display tape or cd display dk on skin = ? dk off sk search radio mode tape mode cd mode vf mode during tape or cd input key display state normal operation output state search operation output state loc loc lit l h off l l
13. loud/rmon when pressed for less than 1.5 seconds: pressing this key turns on the loud display and sets the loud pin to the high level. pressing the key again turns off the loud display and sets the loud pin to the low level. this operation also turns on and off the loudness function implemented in the lc7538jmd. this operation is valid when hold is high and main power is on. when pressed and held down for over 1.5 seconds: 1. when the diode matrix rmon ff/rew setting is 0: this key operation has no effect. when the ff-rew pin goes high, regardless of the state of this key, the LC7233N-8818 enters radio monitor mode temporarily. the rmon display flashes at a 1 hz rate and radio reception becomes possible. 2. when the diode matrix rmon ff/rew setting is 1: when this key is pressed the rmon display lights. when the ff-rew pin goes high in this state, the LC7233N-8818 enters radio monitor mode temporarily. the rmon display flashes at a 1 hz rate and radio reception becomes possible. pressing this key again clears radio monitor mode and returns the LC7233N-8818 to the previous mode. operations 1 and 2 are both possible in vf mode even in the dk wait (standby) state. this operation is valid when hold is high and main power is on. 14. power (when the diode matrix power sw setting is 1) this key is used when the tact key in the key matrix controls the power. when this key is pressed the power pin goes high and furthermore, the LC7233N-8818 switches to tape mode if there is tape input or to cd mode if cd is on, i.e., if the cdin pin is low. 15. mo/st when the LC7233N-8818 is in an fm radio mode (including vf mode), pressing this key turns on the st display. pressing this key again turns off the st display. however, note that this operation is valid for both the fm and mw bands in products for the us and japanese markets when the diode matrix am st sel setting is 1. this setting can be specified independently for the fm and mw bands (but not for each of the fm1, fm2, fm3, mw1 and mw2 bands). no. 4743- 22 /36 LC7233N-8818 key display state output state loud loud lit h off l key display state output state mo/st st lit l off h key display state (setting state) ff-rew l h rmon lit (enabled) lit blinking at a 1 hz rate off (disabled) off rmon
16. v-sel when this key is pressed, a cyclic operation is started from the bass setting, which is the next item in the cycle. five seconds after the key is released, the LC7233N-8818 automatically returns to the volume control position and the seven segment character display returns to frequency, tape, or cd display. however, if the v-up or v-down key is pressed within 5 seconds, then five seconds after that key is released, the LC7233N-8818 automatically returns to the volume control position and the seven segment character display returns to frequency, tape, or cd display. note: * when the diode matrix fader setting is 1. when this key is first pressed, the cycle always starts from the volume position. 17. v-up and v-down these keys increase or decrease a level setting in 2 db steps each time they are pressed. when dk is on, the volume can be increased up to ?0 db. when the volume is ?0 db or over, it remains at that level. volume mode when the v-up or the v-down key is held down for over 500 ms, the level setting is increased or decreased at a 150 ms/db rate. when the value falls under the value listed in the table, the display shifts to the next point. bass/treble mode volume bass treble balance fader * no. 4743- 23 /36 LC7233N-8818 display point 1 2 3 4 5 6 7 8 9 10 11 volume (db) ?0 ?2 ?4 ?6 ?8 ?2 ? ? ? 0
the bass or treble is shifted at a 150 ms/step rate when the v-up or v-down key is held down for over 500 ms. balance mode the balance is shifted at a 150 ms/db rate when the v-up or v-down key is held down for over 500 ms. no. 4743- 24 /36 LC7233N-8818 display point 1 2 3 4 5 6 7 8 9 10 11 step value 1 2 3 4 5 6 7 8 9 10 11 display point 1 2 3 4 5 6 7 8 9 10 11 volume difference (db) ?0 ? ? ? 0 ? ? ? ?0
fader mode the fader is shifted at a 150 ms/db rate when the v-up or v-down key is held down for over 500 ms. 18. mute when the diode matrix ?0 db setting is 0, pressing this key sets the mute pin high and the amute pin low, and when the diode matrix ?0 db setting is 1, pressing this key sets the mute and amute pins high. when the key is pressed again the changed pins are returned to their previous state. the lc75853e/w volume setting is set to ?9 db by this operation. additionally, the volume level display (not including the + or ?indicators) flashes at a 1 hz rate. in the initial state the mute pin is low. 19. ill2 port (the lc75853e/w pin 2) the state of the lc75853 s2 changes depending on whether the LC7233N-8818 is in radio mode or tape mode. valid when panel in is low. this is optimal for two-color illumination control based on the mode when a cc is on (i.e., main power is on). no. 4743- 25 /36 LC7233N-8818 display point 1 2 3 4 5 6 7 8 9 10 11 volume difference (db) ?5 ?0 ?4 ? ? 0 ? ? ?4 ?0 ?5 radio tape or cd when hold is low, or in the initial state s2 (2 pin) h l l
p o wer connection 1. power key systems (when the diode matrix power sw setting is 1) 2. external power switch systems (when the diode matrix power sw setting is 0) state t ransition dia gram 1. normal mode, clock disabled no. 4743- 26 /36 LC7233N-8818
2. normal mode, clock enabled 3. vf mode, clock disabled note: the radio monitor transitions have been omitted. no. 4743- 27 /36 LC7233N-8818
4. vf mode, clock enabled note: 1. keys are indicated in boxes. however, note that when ff-rew is high (+ is on: based on the diode matrix rmon ff-rew setting) the LC7233N-8818 goes to radio monitor mode. 2. on operates identically when cdin is low. 3. if vf is switched from off to on during radio monitor mode, radio monitor mode is cleared and the LC7233N-8818 switches to vf m ode. 4. if dkin goes low during radio monitor mode, radio monitor mode is cleared and sk broadcast begins. timing 1. t-up/down, seek, scan note: 1. if count tolerance 2. an sd check is performed for 10 ms if if count is enabled, and for 15 ms if if count is disabled. cd rmon no. 4743- 28 /36 LC7233N-8818 fm 10.7 mhz 10 khz mw 450 khz 3 khz lw 450 khz 0.6 khz
2. manual up/down (both fm and am) 3. vf auto-retune the LC7233N-8818 retunes with the following timing if a high level on skin continues for more than 25 seconds in vf mode. note: 1. the timing for the vf preset memory search technique is shown in the figure below. 2. if there is no sd in a vf preset memory, a normal vf seek up operation is performed with timing identical to (1) above. no. 4743- 29 /36 LC7233N-8818
4. loc pin control seek, scan, amem and vf auto-retune operations when the loc display is lit. 5. skin check timing when vf mode is switched from off to on 6. audio mute (amute) ? key chattering rejection time (40 ms) - audio mute lead time and beep output (50 ms) ? pll data and display update processing (30 to 50 ms) audio mute trailing time band and m1 to m6 keys, and a vf on to off transition vf off to on transition (except for times when dk is disabled, tape or cdin are low, or cd is on) note: item a includes checking the skin signal. no. 4743- 30 /36 LC7233N-8818
up, down ps (preset scan) amem, t-up/down, seek, scan vf auto retune note: amute is not output for (a) through (f) when dk is disabled, tape or cdin is low, or cd is on. however, amute is output during a band switch in (a). 7. mode changes for each mode, when: radio on radio monitor on/off tape in/out on/off cdin = ?? ? ?? ? ? cd no. 4743- 31 /36 LC7233N-8818
vf off to on (tape and cd in modes) 8. allowable scan direction display timing sk display based on skin and st display based on stereo in fm radio also valid in am radio mode when the diode matrix amst sel setting is 1 and vf modes. 9. alarm output (vf mode) if a high level skin signal continues for 25 seconds, an alarm signal (the sum of (approximately) 4.4 khz and (approximately) 2 hz signals) is output, and a seek up operation is started. (when the diode matrix vf autoretune setting is 0.) no. 4743- 32 /36 LC7233N-8818
10. beep output a beep is output for keys that have two functions (m1 to m6, loud/rmon, up/t-up, down/t-down, v-up, v-down, band/ill1 and ps/amem) so that the user can recognize which key was pressed. the beep is output once (for presses less than 0.5, 1.5 or 2.0 seconds) or twice (for presses longer than 0.5, 1.5 or 2.0 seconds). one beep two beeps 11. hold mode when the clock is enabled and hold pin goes from high to low, inputs from the fmin, amin and hctr pins are disabled. the LC7233N-8818 enters a state where only the clock operates. this is referred to as hold mode. 12. backup mode when the clock is disabled and the hold pin goes from high to low, inputs from the fmin, amin and hctr pins are disabled, the 4.5 mhz crystal oscillator is stopped, and the LC7233N-8818 enters low power mode. this is referred to as backup mode. no. 4743- 33 /36 LC7233N-8818
13. timings when detached note: display data is transferred twice when the LC7233N-8818 is first brought up, and thereafter only when changed by some op eration. when a power key is used, i.e., the diode matrix power sw setting is 1 if the panel is removed and replaced in the power on state, the power is turned off. when an external power switch is used, i.e., when the diode matrix power sw setting is 0 if the panel is removed and replaced in the power on state, the power remains on. initial states t rac king p oint frequenc y note: 1. fm2, fm3 and mw2 load the lower band edge. 2. in eastern europe, fm2 and fm3 load 87.5 mhz. no. 4743- 34 /36 LC7233N-8818 radio mode tape mode power on, hold = ??(panel in = ?? volume setting ........... ?0 db cd off loud ........................ off radio monitor .......... off mute off ................... ? ill1 ........................... ? ill2 ........................... ? band .......................... fm1 (low band edge) mo/st ....................... stereo vf .............................. off loc ........................... dx (off) nr b, nr c ............... off aps ........................... off mtl ........................... off area band m1 m2 m3 m4 m5 m6 last channel fm a, b 87.5 90.1 98.1 106.1 87.5 87.5 87.5 usa mw a 530 600 1000 1400 530 530 530 mw b 530 600 1000 1400 530 530 530 southeast fm c 87.5 90.0 98.0 106.0 87.5 87.5 87.5 asia mw h 531 603 999 1404 531 531 531 fm c, d 87.5 90.0 98.0 106.0 87.5 87.5 87.5 europe mw c 531 603 999 1404 531 531 531 lw a 153 160 200 260 153 153 153 lw b 146 160 200 260 146 146 146 japan fm e 76.0 78.6 83.0 86.6 76.0 76.0 76.0 mw e 522 603 999 1404 522 522 522 saudi arabia fm b 87.5 90.1 98.1 106.1 87.5 87.5 87.5 mw f 531 603 999 1404 531 531 531 south africa fm f 87.5 90.1 98.1 106.1 87.5 87.5 87.5 mw g 531 603 999 1404 531 531 531 east europe fm g 65.0 74.0 87.5 94.0 65.0 65.0 65.0 mwc 531 603 999 1404 531 531 531
no. 4743- 35 /36 LC7233N-8818 LC7233N-8818 detac hab le system
ps no. 4743- 36 /36 LC7233N-8818 this catalog provides information as of july, 1995. specifications and information herein are subject to change without notice. n no products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. n anyone purchasing any products described or contained herein for an above-mentioned use shall: accept full responsibility and indemnify and defend sanyo electric co., ltd., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on sanyo electric co., ltd., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. n information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. sanyo believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.

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