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data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 1 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| features ? pt8a977b works as encoder and PT8A978B/ 978bl works as decoder ? five pins for five control functions ? operating power-supply voltage: 2.5v to 5.0v (978b), 2.0v to 5.0v (978bl), 1.8v to 5.0v(977b) ? auto-power-off and oscillation-off if no press on any button (977b) ? press on any button to wake up (977b) ? one output pin used for external power control (977b) ? on-chip oscillator with an external resistor ? on-chip reversing amplifiers (978b, 978bl) ? low operating current ? few external components needed ? package: 14-pin dip, 14-pin soic, 16-pin dip and 16-pin soic general description the pt8a977b and PT8A978B (or 978bl) provide complete control functions to the remote-controlled toy. the pt8a977b has five input pins corresponding with the five function buttons i.e, forward, backward, rightward, leftward and turbo. the encoding circuit in the pt8a977b 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 PT8A978B (or 978bl) 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 pt8a977b and 978b/978bl 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 pt8a977b and PT8A978B/978bl must be less than 25 %. the auto-power-off function is achieved by an internal counter (977b). the pc output is used to control on/ off state of the external power supply. press on any function button will wake up the chip promptly. part no. package pt8a977bp 14-pin dip pt8a977bw 14-pin soic pt8a977bde die form PT8A978Bp 16-pin dip PT8A978Blw 16-pin soic PT8A978Bde die form ordering information
data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 2 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| block diagram of 978b/978bl 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 977b 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 PT8A978Bp/978blw 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 pt8a977bp/977bw 14-pin dip/14-pin soic osci osco right left turbo forward backward oscillator input circuit timing generator encoding circuit output circuit pc so sc off
data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 3 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| pad location pt8a977bde 1245 m m 1160 m m die_no right left off osci osco pc v cc so sc turbo forward backward gnd test x y pad coordinates pad name x coordinate y coordinate pad name x coordinate y coordinate right 1048.5 388 so 96 469.5 test 1033 100 v cc 96 714 gnd 903 100 pc 270 918.5 backward 773 100 osco 510.5 937.5 forward 643 100 osci 1048.5 790.5 turbo 513 100 off 1048.5 658 sc 269.5 115 left 1048.5 523 note: substrate is connected to v cc
data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 4 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 1 335 m m 1520 m m die_no right left osci osco turbo forward b ackward si x y gnd vo2 vi2 vo1 vi1 ld v cc rd pad coordinates pad name x coordinate y coordinate pad name x coordinate y coordinate vo2 174.5 623 ld 1322 328.5 gnd 174.5 759 b ackward 1292 99.5 si 157 896.5 forward 991.5 100.5 osc i 443 1123 t urbo 703.5 100.5 osco 1007 1123 vcc 470 101.5 r ight 1253 1131 vi1 174.5 204 left 1322 853 vo1 174.5 338 rd 1322 618.5 vi2 174.5 489 note :substrate is connected to v cc pad location PT8A978Bde
data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 5 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| pin/pad description of 978b/978bl pin no. 1 2 5 6 4 7 8 3 9 10 11 12 13 14 pin/pad 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/pad description pin/pad description of 977b pin no. 1 2 5 6 4 7 8 3 9 10 11 12 13 14 pin/pad 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
data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 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 977b note: over the operating rating, 0 o c t a 70 o c, v cc = 4v dc electrical charateristics of 978b/978bl 1.8 4.0 5.0 v parameters description test condition min. type 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, 14 v ih = 4v, on state 10 ua pin 1, 4, 5, 6, 14 v il = 0v, on state pin 7, 8, 10 pin 11 v out = 3.5 v -500 ua note : over the operating rating, 0 o c t a 70 o c, v cc = 4v pin 6, 7, 10, 11, 12 2.5 4.0 5.0 v parameters description test condition min. type 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 ua pin 1, 15 v out = 0.5 v 200 ua v cc operating voltage - 978b 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, 15 pin 6, 7, 10, 11, 12 v out = 2.5 v -600 ua v out = 0.5 v 1 ma operating voltage - 978bl 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 pin 5 v out = 0.5 v 500 ua v out = 3.5 v -500 ua pin 5
data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 7 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ac electrical characteristics ac electrical characteristics of 977b ac electrical characteristics of 978b/978bl 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 carrier frequency of sc pin t a = 25 o c, r = 200 k w 102 128 154 kh 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 f csc oscillator frequency fluctuation t a =25 o c, v cc = 1.8 ~ 5v 15 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 0.75 1 1.25 ms f osc = 128 khz 1.5 2 2.5 ms t a = 25 o c, r = 200 k w 102 128 154 k h z v si si pin receive sensitivity (v pp ) guaranteed effective decoding 300 mv oscillator frequency fluctuation - 978b oscillator frequency fluctuation - 978bl t a =25 o c, v cc =2.5 ~ 5v 15 k h z f max -f min t a =25 o c, v cc =2.0 ~ 5v 10 k h z note : over the operating rating, 0 o c t a 70 o c, v cc = 4v * the relative error between the frequencies of the two on-chip oscillators in the pt8a977b and PT8A978B (or 978bl) must be less than +25%. note : over the operating rating, 0 o c t a 70 o c, v cc = 4v * the relative error between the frequencies of the two on-chip oscillators in the pt8a977b and PT8A978B (or 978bl) must be less than +25%.
data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 8 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| application circuits typical application of pt8a977b for transmit circuit q2 c945 q1 c945 d1 4.7v c2 0.1u c1 10u 9v s1 l3 12t r2 330 right 1 test 2 gnd 3 backward 4 forward 5 turbo 6 sc 7 so 8 v cc 9 pc 10 osco 11 osci 12 off 13 left 14 pt8a977b r3* r4 100 r5* r6 100 c3* c4 47p c5 47 c6 103 c7 47p c9* l4 2.2uh x1* l1* c8* l2* a1 c10 0.01u r7 1k led1 r1 200k l r b f frequency c3* c8* c9* r3* r5* l1* l2* x1 27mhz 47p 180p 47p 120k 15k 2.2uh 2.2uh 27.145mhz 49mhz 22p 100p 30p 68k 22k 1uh 1uh 49.860mhz
data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 9 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| typical application of PT8A978B/978bl for transmit circuit frequency c1* c2* c3* c4* q1* r1* r2* l1* l2* 27mhz 10p 47p 47 p 3300p c1815-y 150k 680 7t 8.2uh 49mhz 5p 25p 10p 2200p c380-o 180k 820 5t 3.3uh q3 9014 q7 8050 q5 8550 q4 8550 q6 8050 q2 9014 d1 3.3v c12 0.1u c11 100u c10 4700p c3 10p c6* c5 4.7u c4* c2* q1* c1* a1 c7 0.1u c8 470p c9 0.1u m1 m2 q8 9014 q12 8050 q10 8550 q11 8550 q13 8050 q9 9014 c13 104 c14 104 6v s1 l2* l1* vo2 1 gnd 2 si 3 osci 4 osco 5 right 6 left 7 rd 8 ld 9 backward 10 forward 11 turbo 12 vcc 13 vi1 14 vo1 15 vi2 16 PT8A978Bp r2* r1* r4 2.2k r5 2.2m r6 2.2k r7 2.2m r8 2.2k r9 200k r3 3.9k r10 330 r17 220 r18 220 r13 100 r14 100 r15 1k r16 1k r11 1k r12 1k
data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 10 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| mechanical diagram of 14-pin soic mechanical diagram of 16-pin soic
data sheet pt8a977b /978b/978bl 5-function remote controller pt0085(02/04) ver:5 11 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| notes pericom technology inc. email: support@pti.com.cn web site: www.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 notice, in order to improve design or performance and to supply the best possible product. pericom technology does not assume any responsibility for 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.

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