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Data Sheet PT8A971AP/972AP 5-Function Remote Controller
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Features
* The PT8A971AP works as the encoder and the PT8A972AP works as the decoder * Five pins for five control functions * Operating power supply voltage: 2.5 to 5.0V * Auto-power-off if no press on any button in 8s or continuously press on any button over 4 minutes (971AP) * Press on any button to wake up * Manual-power-off with OFF button (971AP) * One output pin used for external power control * On-chip oscillator with an external resistor * Low operating current * Few external components needed * Package: 14-pin DIP (971AP) and 16-pin DIP (972AP)
LSIs designed to provide a complete control functions to remote-controlled toy. The PT8A971AP has five input pins corresponding with the five function buttons - forward, backward, right, left and turbo. The encoding circuit in the PT8A971AP sends digital codes to the two output pins SO and SC. The digital codes correspond to the definite function buttons and their combinations. The SO and SC outputs are used in wireless and infrared applications respectively. There is an internal oscillator in the PT8A971AP and PT8A972AP respectively. The oscillator frequency can be adjusted by the external resistor. The relative error between the frequencies of the two on-chip oscillators in the PT8A971AP and PT8A972AP must be less than 25%. The auto-power-off function is achieved by internal counters. Pressing OFF button can also shut down the power supply. Press on any function button will wake up the chip promptly.
General Description
The PT8A971AP and PT8A972AP is a pair of CMOS
Block Diagram
Block Diagram of PT8A971AP
OFF
OSCI Oscillator OSCO Timing Generator 4 Minutes Counter PC
Right Left Turbo Forward Backward Input Circuit Encoding Circuit Output Circuit SO SC
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Data Sheet PT8A971AP/972AP 5-Function Remote Controller
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Block Diagram of PT8A972AP
ON/OFF
OSCI Oscillator OSCO Timing Generator 5 Minutes Counter Power Control PC
SI
Amp.
Sig. Sample & Fault-Tolerant Check VO1
Decoding Circuit Right Left Output Circuit Latch Turbo Forward Backward
VI1
Amp.
VI2
Amp.
VO2
Pin Configuration
PT8A971AP 14-Pin PDIP OFF Backward GND Forward NC Turbo SC 1 2 3 4 5 6 7 14 13 12 11 10 9 8 Top View Top View Right Left OSCI OSCO PC VCC SO VI2 VO2 SI OSCI OSCO PC ON/OFF Right PT8A972AP 16-Pin PDIP 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 GND VO1 VI1 VCC Turbo Forward Backward Left
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Data Sheet PT8A971AP/972AP 5-Function Remote Controller
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Pin Description
Pin Description of PT8A971AP
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Na me O FF
Backward GND Forward NC Turbo SC SO VCC PC O SC O O SC I Left Right I O O P O O I I I
Type
I I GND I
De s cr ipt ion Cuts off external power supply to the PT8A971A when Low. Backward function selected if this pin connected to GND, with pull- up resistor. Ground Forward function selected if this pin connected to GND, with pull- up resistor. No Connection Turbo function selected if this pin connected to GND, with pull- up resistor. Output pin of the encoding signal with carrier frequency Output pin of the encoding signal without carrier frequency Power supply Power control output pin Oscillator output pin Oscillator input pin 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.
Pin Description of PT8A972AP
Pin No 1, 14 2, 15 3 4 5 6 7 8 9 10 11 12 13 16
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Pin Na me VI2, VI1 VO2, VO1 SI O SC I O SC O PC ON/OFF Right Left Backward Forward Turbo VCC GND
Type I O I I O O I O O O O O P GND Input pins of amplifiers 1 and 2 Output pins of amplifiers 1 and 2 Input pin for encoded signal Oscillator input pin Oscillator output pin Power Control output pin On/Off pin Right output pin Left output pin Backward output pin Forward output pin Turbo output pin Power supply Ground
De s cr ipt ion
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Data Sheet PT8A971AP/972AP 5-Function Remote Controller
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Code Format
(W1 is for function codes and W2 for start codes)
W1
W1: 1kHz 50% Duty Cycle (Typical)
W2
W2: 500Hz 75% Duty Cycle (Typical)
Word Format
Start Code: 4 x W2 1 Word
Function Code: n x W1
Encoding and Decoding Timing
Encoding String: W2, W2, W2, W2, (n)xW1, W2, W2, W2, W2, (n)xW1, W2, W2, W2, W2, (n)xW1, ... ...
Press Any Button on PT8A971AP Encoding Output from PT8A971AP 1st word 2nd word last word Function Codes
1
2
3
14 15
End Codes
Decoding Output from PT8A972AP 9ms 9ms
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Data Sheet PT8A971AP/972AP 5-Function Remote Controller
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Encoding Input and Decoding Result
Number of Function Codes (n) W1 41 10 1 16 1 22 1 28 1 34 1 40 1 46 1 52 1 58 1 64 1 End Code Forward (Pulse) Forward (High level) Turbo Forward (High level) & Left Forward (High level) & Right Backward Backward & Right Backward & Left Left Right Decoding Results
PC Output Timing
PC Timing of PT8A971AP
VCC OFF PC 8s VCC OFF PC 8s
Note: Pins 2, 4, 6, 13 and 14 are High.
VCC Pins 2, 4, 6, 13, 14 PC 8s 8s 4 min
PC Timing of PT8A972AP
VCC ON/OFF SI PC 5 minutes
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Data Sheet PT8A971AP/972AP 5-Function Remote Controller
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested) Note: Storage Temperature ........................................................ -25oC to +85oC Stresses greater than those listed under MAXIMUM Ambient Temperature with Power Applied ...................... -10oC to +40oC RATINGS may cause permanent damage to the Supply Voltage to Ground Potential (Inputs & VCC Only) .... -0.5 to +6.0V device. This is a stress rating only and functional Supply Voltage to Ground Potential (Outputs & D/O Only) -0.5 to +6.0V operation of the device at these or any other condiDC Input Voltage ................................................................ -0.5 to +6.0V tions above those indicated in the operational secDC Output Current ........................................................................ 20mA tions of this specification is not implied. Exposure Power Dissipation ....................................................................... 500mW to absolute maximum rating conditions for extended periods may affect reliability.
DC Electrical Characteristics
DC Electrical Characteristics of PT8A971AP
Sym V CC I CC ISTB VIH VIL IIH IIL IOH IOL Description Operating Voltage Supply Current Stand-by Current Input High Voltage Input Low Voltage Input High Current Input Low Current Output High Current Output Low Current Pins 7, 8, 10 Pin 11 Pins 7, 8, 10 Pin 11 Test Condition Output Unloaded Guaranteed Logic High Level Guaranteed Logic Low Level VIN = VCC VIN = GND VOUT = 3.5V VOUT = 3.5V VOUT = 0.5V VOUT = 0.5V -1 -0.2 0.5 0.2 1 -1 3.5 0.5 10 -60 Min 2.5 Type 4.0 Max 5.0 300 10 Units V uA uA V V uA uA mA mA mA mA
Note: Over the Operating Rating, 0C TA 70C, VCC = 4V DC Electrical Characteristics of PT8A972AP
Sym V CC I CC ISTB VIH VIL IIH Description Operating Voltage Supply Current Stand-by Current Input High Voltage Input Low Voltage Input High Current Pin 3 Pins 1, 4, 7, 14 Pin 7 IIL Input Low Current Pin 3 Pins 1, 4, 14 IOH IOL Output High Current Output Low Current * In OFF state Guaranteed Logic High Level Guaranteed Logic Low Level VIN = VCC VIN = VCC VIN = GND VIN = GND VIN = GND -4 -0.2 0.5 0.2 0.5 -1 -10 3.5 0.5 20 10 -60 -20 -10 Test Condition Min 2.5 Type 4.0 Max 5.0 1.5 30 Units V mA uA V V uA uA uA uA uA mA mA mA mA
Pins 6, 8, 9, 10, 11, 12 VOUT = 3.5V VOUT = 3.5V Pins 2, 5, 15 Pins 6, 8, 9, 10, 11, 12 VOUT = 0.5V Pins 2, 5, 15 VOUT = 0.5V
Note: Over the Operating Rating, 0C TA 70C, VCC = 4V * Output unloaded; 2.2MW feedback resistors for two reversing amplifiers; 200kW external resistor for on-chip oscillator.
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Data Sheet PT8A971AP/972AP 5-Function Remote Controller
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AC Electrical Characteristics
AC Electrical Characteristics of PT8A971AP
Sym fOSC tFUN tSTA Description Oscillator Frequency * Cycle Time of Function Code Cycle Time of Start Code Carrier Frequency of SC Pin Time of Auto-Power-Off ** Test Condition TA= 25C, R = 200 kW fOSC = 102 to 154 kHz fOSC = 102 to 154 kHz fOSC = 102 to 154 kHz Pins 2, 4, 6, 13 and 14 are High. Any of pins 2, 4, 6, 13 and 14 is Low. Min 102 0.8 1.6 51 6.4 3.2 Type 128 1 2 64 8 4 Max 154 1.2 2.4 77 9.6 4.8 Units kHz ms ms kHz s min
fCSC
tOFF
Note: Over the Operating Rating, 0C TA 70C, VCC = 4V * The relative frequency error between two on-chip oscillators of the PT8A971AP and PT8A972AP must be less than 25%. ** Adjusting the external oscillator resistor will cause the auto-power-off time change. AC Electrical Characteristics of PT8A972AP
Sym fOSC VSI tFUN tSTA tOFF tDEC Description Oscillator Frequency * SI Pin VPP Receive Sensitivity Cycle Time of Function Code Cycle Time of Start Code Time of Auto-Power-Off ** Decode time for function code Decode time for end code Test Condition TA= 25C, R = 200 kW Guaranteed effective decoding fOSC = 128 kHz to 154kHz fOSC = 128 kHz to 154kHz fOSC = 102 to 154 kHz fOSC = 128 kHz fOSC = 128 kHz to 154kHz Min 102 300 0.75 1.5 4 45 7 9 1 2 5 1.25 2.5 6 153 11 Type 128 Max 154 Units kHz mV ms ms min. ms ms
Note: Over the Operating Rating, 0C TA 70C, VCC = 4V * The relative frequency error between two on-chip oscillators of the PT8A971AP and PT8A972AP must be less than 25%. ** Adjusting the external oscillator resistor will cause the auto-power-off time change.
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Data Sheet PT8A971AP/972AP 5-Function Remote Controller
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Application Circuit
Typical Application of PT8A971AP for Transmit Circuit With 9V Battery
B1 9V
A1 ANTENNA
R11 10M 1M
6.8u
V5 8550
R8 3.9K
L3
C2 150
C1 100
L4
V6 9013
L2 2.2u
C4 150
V3 LED
R2 4.7K
V1 9014
C8 .02u
C3 47
C9 68 R10 1K R4 6.8K C7 68
R5 33K
R1 100
C6 .02u
R9 330
CR1 27.145M
2.2u
L1
V4 4.7V
C11 4.7u
V7 4148
8 9
PT8A971AP
SO VCC PC OSCO OSCI Left Right SC Turbo NC Forward GND Backward OFF
R3 220K
7 6 5 4 3 2 1
C12 .01u
V2 9014 S1 S2 S3 S4
R12 1OM 1M
10 11
R7 200k
12
S5
13 14
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S6
R6 100
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Data Sheet PT8A971AP/972AP 5-Function Remote Controller
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Typical Application of PT8A972AP
C15 .01u A1 C2 47 C1 4 V1 C1815 R2 180K C6 18 R10 4.3K C12 100u L2
C13 4.7u
C14 .01u
R28 1M
R12 510
V17 8550
VD2 4148 R20 100
VD1 4.7V
C18 100u V9 8550 V5 8550
C19 .1u 12V R11 10 9V
L1 2.2u C3 3000
V8 9013
R16 100 V2 9013 V4 8550
C16 .02u M1
R17 100 V7 9013 R27 3.9K
C4 4.7u R1 1K
C5 .02u R3 2.2K C7 .1u R4 2.2M
R23 1K
R24 1K
R15 330
V3 8050
V6 8050
R18 330
R25 1K
V16 9013 C8 470
R5 2.2k
14 11 13 16 15 12 10
VI1 VI1
Turbo Tu rb o
FForward o rw ard
GND GND
P T8 A 9 7 2 A P
C9 .1u
ON/OFFFBBackward O N / O F ack w ard
VDVCC D
VO 1 VO1
LLeft eft
R22 1K R14 220 V10 9013
9
OSCO O SCO
R13 220 V11 9013
O SCI OSCI
VI2 VI2
PC PC
2.2K
1 2 3 4 5 6 7 8
S SII
R5
Rightt R ig h
VO 2 VO2
V13 8550
C17 .02u M2
V14 8550
C10 30
R6 2.2M R7 2.2K R26 1K C11 1000 R8 200k
R21 1K R9 330
V12 8050
V15 8050
R19 330
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Data Sheet PT8A971AP/972AP 5-Function Remote Controller
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Notes
Pericom Technology Inc.
Email: support@pti.com.cn China: Asia Pacific: U.S.A.: Web Site: www.pti.com.cn, www.pti-ic.com No. 20 Building, 3/F, 481 Guiping Road, Shanghai, 200233, China Tel: (86)-21-6485 0576 Fax: (86)-21-6485 2181 Unit 1517, 15/F, Chevalier Commercial Centre, 8 Wang Hoi Rd, Kowloon Bay, Hongkong Tel: (852)-2243 3660 Fax: (852)- 2243 3667 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. PT0066(28/08/01)
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