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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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Features
* PT8A977B works as encoder and PT8A9781 works as decoder * Four control functions * Operating power-supply voltage: 1.8V to 5.0V(977B) 1.0V to 1.5V (9781) * Auto-power-off and oscillation-off if no press on any button (977B) * Press on any button to wake up (977B) * On-chip oscillator with an external resistor (977B) * On-chip oscillator with an external resistor and capacitor (9781) * On-chip amplifiers (9781) * Low operating current * Few external components needed
General Description
The PT8A977B and PT8A9781 provide a complete control functions to the remote-controlled toy. The PT8A9781 has four output pins corresponding with the four actions i.e, forward, backward, right, left. 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 PT8A9781. By adding an external resistor and capacitor conveniently, the oscillator will be constructed. The external resistor and capacitor can adjust the oscillator frequency. The relative error between the frequencies of the two onchip oscillators in the PT8A977B and PT8A9781 must be less than 25%.
Package 14-pin DIP 14-pin SOIC Die Form 16-pin SOIC Die Form
Ordering Information
Part No. PT8A977BP PT8A977BW PT8A977BDE PT8A9781W PT8A9781DE
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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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Block Diagram
Block Diagram of 977B
OFF OSCI OSCO
Oscillator
Timing Generator
PC
Forward Backward Left Right Turbo
Input Circuit
Encoding Circuit
Output Circuit
SO
SC
Block Diagram of 9781
OSCI OSCO
Oscillator
Timing Generator Signal Sample & Fault-Tolerant Check
Latch
Output Circuit Voltage Booster
SI
Amp
Decoding Circuit
Right Left Backward Forward FOUT
VI1
Amp
VO1
VI2
Amp
VO2 VR
Voltage Reference
Pin Configuration
PT8A977BP/977BW 14-Pin DIP/14-Pin SOIC
Right Test GND Backward Forward Turbo SC 1 2 3 4 5 6 7 14 13 12 11 10 9 8 Left OFF OSCI OSCO PC VCC SO VO2 SI GND OSCI OSCO Left FOUT Forward
PT8A9781W 16-Pin SOIC
1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VI2 VR VO1 VI1 VCC NC Right Backward
Top View
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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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Pad Location
PT8A977BDE
Test Right GND Left OFF OSCI
Die_No
Backward
Forward OSCO
Turbo
SC SO
V CC
PC X Y
1160 m
Pad Coordinates Pad Name Right Test GND Backward Forward Turbo X Coordinate 1048.5 1033 903 773 643 513 Y Coordinate 388 100 100 100 100 100 Pad Name SO V CC PC OSCO OSCI OFF Left X Coordinate 96 96 270 510.5 1048.5 1048.5 1048.5 Y Coordinate 469.5 714 918.5 937.5 790.5 658 523
SC 269.5 115 Note: Substrate is connected to V CC
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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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Pad Location
PT8A9781DE
SI AGND
VO2
VI2
VR VO1
DGND VI1
1240um
OSCI
AVDD DVDD
OSCO
RIGHT Forward Backward
Die No.
LEFT FOUT
1140um
Pad Coordinate File Pad Name X Coordinate Y Coordinate 451.4 451.4 313 192.6 40.8 -227.7 -373.7 -451.3 -451.3 Pad Name Backward Right DVDD AVDD VI1 VO1 VR VI2 X Coordinate 127.3 398.9 398.9 398.9 398.9 398.9 280.9 160.7 Y Coordinate -451.3 -354.4 -234 -88 26.6 178.4 451.4 451.4 VO2 8.9 SI -105.7 AGND -398.9 DGND -398.9 OSCI -398.9 OSCO -398.9 Left -398.9 FOUT -188 Forward 2.7 Note: Substrate is connected to GND
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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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Pin/Pad Description
Pin/Pad Description of 977B Pin No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 Pin/Pad Name Right Test GND Backward Forward Turbo SC SO Vcc PC OSCO OSCI OFF Left Description With Pull-up resistor, rightward function selected if this pin connected to GND. With Pull-up resistor, this pin is used for testing mode. Negative power supply With Pull-up resistor, backward function selected if this pin connected to GND. 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. 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 With Pull-up resistor, this pin is used to shut down the external power supply. With Pull-up resistor, leftward function selected if this pin connected to GND.
Pin/Pad Description of 9781 Pin No.
1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 Pin/Pad Name VO2 SI AGND GND OSCI OSCO Left FOUT Backward Forward Right VCC VI1 VO1 VR VI2 DVDD AVDD DGND Description Output pin for the amplifier 2 Input pin of the encoding signal Analog ground, bonded to DGND as GND Digital ground, bonded to AGND as GND Oscillator input pin Oscillator output pin Leftward output pin Output pulse with 50% duty cycle, fequency is about 64kHz. Backward output pin Forward output pin Rightward output pin Digital power supply, bonded to AVDD as VCC Analog power supply, bonded to DVDD as VCC Input pin for the amplifier 1 Output pin for the amplifier 1 Amplifier bias voltage Input pin for the amplifier 2
Note: additional VCC may be needed for on-chip analog circuit.
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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested) Storage Temperature ..............................................................-25oC to +85o C Ambient Temperature with Power Applied ..........................10oC to +40o C Supply Voltage to Ground Potential (Inputs & VCC Only) (977B) .................................................. -0.5 to +6.0V Supply Voltage to Ground Potential (Outputs & D/O Only) (977B) .............................................. -0.5 to +6.0V DC Input Voltage (977B) .......................................................... -0.5 to +6.0V Supply Voltage to Ground Potential (Inputs & VCC Only) (9781) .................................................. -0.5 to +5.0V Supply Voltage to Ground Potential (Outputs & D/O Only) (9781) .............................................. -0.5 to +5.0V DC Input Voltage (9781) .......................................................... -0.5 to +5.0V 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 conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
DC Electrical Charateristics
DC Electrical Charateristics of 977B
Parameters VCC ICC ISTB VIL VIH IIL IIH II IOL IOH Description Operating Voltage Supply Current Stand-by Current Input Low Voltage Input High Voltage Input Low Current Input High Current Input Current Output Low Current Output High Current Pin 7, 8, 10 Pin 11 Pin 1, 4, 5, 6, 14 Pin 1, 4, 5, 6, 14 Pin 12 Test Condition Output unloaded OFF State Guaranteed Logic LOW level Guaranteed Logic HIGH level VIL = 0V, ON state VIH = 4V, ON state VIH = 0 ~ 4V, ON state VOUT = 0.5 V VOUT = 3.5 V VOUT = 3.5 V 150 -1.0 -500 Min. 1.8 Type 4.0 Max. 5.0 100 5 0.8 3.0 -60 10 Units V uA uA V V uA uA uA uA mA uA
10
Note: Over the Operating Rating, 0OC TA 70OC, VCC = 4V
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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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DC Electrical Charateristics of 9781
Sym VCC I CC V OH1 VOL1 V OH2 VOL2 IOH1 I OL1 IOH2 I OL2
Description Operating Voltage Supply Current Output High Level1 Output Low Level1 Output High Level2 Output Low Level2 Output High Current1 Output Low Current1 Output High Current2 Output Low Current2
Test Conditions Output load * Forward,Backward, (I OH1 =-150uA) Forward,Backward,(I OL1=4mA) Left, Right, FOUT, (IOH2=-1mA) Left, Right, FOUT, (IOL2=150uA) Forward,Backward, ( VOUT=V CC0.2V) Forward,Backward, (VOUT =0.2V) Left, Right, FOUT ( VOUT=V CC0.2V) Left, Right, FOUT(V OUT=0.2V)
Min. 1.0 V CC-0.2 V CC-0.2 -150 4 -0.8 150
Type 1.2 -
Max. 1.5 3.0 0.2 0.2 -
Unit V mA V V V V uA mA mA uA
TA = 10~40 V cc = 1.0V~1.5V C, * 2.2M feedback resistors for the two reversing amplifiers; 9.1k external resistor and a 180pf capacitor for the on-chip oscillator.
AC Electrical Characteristics
AC Electrical Characteristics of 977B
Parameters fOSC fmax -fmin tFUN tSTA fCSC Description Oscillator Frequency * Oscillator Frequency Fluctuation Cycle Time of Function Code Cycle Time of Start Code Carrier Frequency of SC Pin Test Condition TA= R = 200 k TA=25OC, VCC= 1.8 ~ 5V fOSC = 102 to 154 kHz fOSC = 102 to 154 kHz fOSC = 102 to 154 kHz 25OC, Min. 102 0.8 1.6 51 Type 128 1 2 64 Max. 154 15 1.2 2.4 77 Units z kz ms ms kHz
Note: Over the Operating Rating, 0OC TA 70OC, VCC = 4V * The relative error between the frequencies of the two on-chip oscillators in the PT8A977B and PT8A9781 must be less than 25%. AC Electrical Characteristics of 9781
Sym fOSC fFOUT D FOUT VSI TFUN TSTA
Description Oscillator Frequency* Frequency of FOUT Duty Cycle of FOUT SI Pin Receive Sensitivity Cycle Time of Function Code Cycle Time of Start Code
Test Conditions R=9.1k, C=180pf, VCC = 1.0 ~ 1.5V
Min. 119.04 45
Type 131 65.5 50 1 2
Max. 136.96 55 300 1.25 2.5
Unit kHz kHz % mV ms ms
Guaranteed Effective Decoding -
0.75 1.5
TA = 10~40C, Vcc = 1.0V~1.5V * The relative error between the frequencies of the two on-chip oscillators in the PT8A977B and PT8A9781 must be less than 25%.
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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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Application Circuits
Typical Application of PT8A977B For Transmit Circuit
9V
L4 2.2uH
A1
L3 12T
S1
C8*
C9*
C10 0.01u
LED1
47p Q2 C945
L2*
C7
R7 1k
R5*
47p
Q1 C945 X1*
L1*
C3*
C4
C5 47
R6 100 PT8A977B
8 9 10 11 12 SO VCC PC SC Turbo Forward 7 6 5 4 3 2 1
C6 103 L R BF
R2 330
C1 10u
C2 0.1u
D1 4.7V
OSCO Backward OSCI OFF Left GND Test Right
R1 200k
13 14
Frequency 27MHz 49MHz
C3* 47p 22p
C8* 180p 100p
C9* 47p 30p
R3* 120k 68k
R3*
R5* 15k 22k
L1* 2.2uH 1uH
R4 100
L2* 2.2uH 1uH
X1 27.145MHZ 49.860MHz
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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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Typical Application of PT8A9781 For Receive Circuit
ANTENNA A1 C2* C1* L1* Q7* L2* R1* C12* R2* C4 C8 R4 2.2K R19 1M C17
PT8A9781
Notes Accuracy of R8 is 1%. : 1. 2. Accuracy of C5 should be <= 10%. 3. All 8550 and 8050 transistor's Hfe >= 200.
1.2V C16 104 C18 10UF R17 270 VCC R16 20* R3 2.2K C7 R18 1M Q2 8550 C9 104 M1 A + Q1 8550
C3*
R9 3.3K
1.2V B1 1.2V C10 104 R10 30* Q4 8050 Q3 8050 R11 30*
C6*
C13 47UF
R6 2.2M 104 C11 470P VCC R13 20* R12 20*
104
16 15 14 13 12 11 10 9
4.7UF
X1 1.2V R14 20* Q5 8050
VO2 SI GND OSCI OSCO Left FOUT Forward
R7 2.2M
VI2 VR VO1 VI1 Vcc NC Right Backward
X2 Q6 8050
C14 104 R5 2.2K C15 332 R8 9.1k C5 180p
1 2 3 4 5 6 7 8
R15 20*
* Consult factory for details
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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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Mechanical Diagram of 14-pin SOIC
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Data Sheet PT8A977B/9781 5-Function Remote Controller for 1V Micro Cars
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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. PT0118(02/04)
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