SC9012

SC9012 SILAN | Alldatasheet

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Technical content

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 INFRARED REMOTE CONTROL TRANSMITTER

DESCRIPTION

SC9012 is an infrared remote control transmitter utilizing CMOS Technology specially designed for use on infrared remote control applications. It is capable of controlling 32 function keys and 6 double keys. Each system has a maximum of 8 commands; thus, SC9012 can provide up to a total of 256 commands. The pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantage. SC9012 is housed in a 20- pins SO package.

FEATURES

• CMOS Technology * Low Power Consumption * Built-in Oscillation Circuit * Least External Components * 32 Function Keys /G2c8 8 Customer Codes/G2c4 Up to 256 Commands/G2c5 * 6 Double Function Keys * LED Indication of Transmission SOP-20 /G3

ORDERING INFORMATION

APPLICATIONS

• Infrared Remote Control Transmitter Equipment * Television Remote control Equipment * VCR Remote control Equipment * VCD, Audio Equipment PIN CONFIGURATION BLOCK DIAGRAM KI0 KI1 KI2 KI3 D OUT VDD NC OSCO OSCI Vss SEL KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7 LMP SC9012 8 9 OSC Circuit Frequency Division Circuit Timing Generation Customer Code Latch Circuit Key Input Scan Circuit 1 2 3 4 Output Circuit Carrier Generation Circuit Control Circuit Digital Circuit 19 18 17 16 15 14 13 12 Key Output Scan Circuit 5 11 NC OSCI D OUT LMP VSS VDD KI0 KI1 KI2 KI3 KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7 SEL OSCO

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 ABSOLUTE MAXIMUM RATING (Tamb=>25 °C /Gc Characteristic Symbol Value Unit Supply Voltage V DD -0.3 ~ 5.0 V Input Voltage With Respect To Vss VIN Vss-0.3~ VDD +0.3 V Output Current I OUT(REO) -20 mA Power Dissipation Pd 300 mW Storage Temperature Tstg -40 ~ +125 °C Operating Temperature T OPR -20 ~ +75 °C ELECTRICAL CHARACTERISTICS (Tamb=25°C,VDD =3V)/G3 Parameter Symbol Test conditions Min Typ Max Unit Operating supply Voltage V DD All Function Operating 2.0 -- 4.0 V Operating Supply Current I DD fOSC =455 kHz -- -- 1 mA Stand-By Current ISB All Keys Off Stops. Oscillation Output Floating. 1 µA Output High Level Current (Dout) IOH VOH =1.5V, VDD =3V -10 -- -- mA Output Low Level Current (LMP) IOL VOL =1.5V, VDD =3V 5 -- -- mA Input High Level Voltage (KI) V IH VDD =3V 0.7 V DD VDD V Input Low Level Voltage (KI) V IL VDD =3V 0 0.3 V DD V Oscillation Frequency fosc -- 400 455 600 kHz Input Pull-down Resistor (KI) R ON VDD =3V 100 300 500 kΩ PIN DESCRIPTION Pin No. Symbol I/O Description 1~4 KI0~KI3 I Key Scan Input Pins. Each pin has a built-in pull-down resistor 5D OUT O Infrared LED Driving Output Pin 6V DD -- Positive Power Supply 7 NC -- No Connection. (When used, Suggest to connected with V DD )

8 OSCO O Oscillator Output Pin

9 OSCI I Oscillator Input Pin

10 V SS -- Negative Power Supply

11 LMP O LED Display Output Pin

12~19 KO0~KO8 O Key Scan Output Pins

20 SEL I Custom Code Selection Pin

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 FUNCTIONAL DESCRIPTION 1. OSCILLATION CIRCUIT An oscillator circuit may be constructed by connecting a 480kHz or 455kHz Crystal Resonator and two capacitors between OSCO and OSCI. Please refer to the follow diagram. Unless the keys are being operated, the oscillation is normally stopped. Thus, power consumption is considerably reduced. OSCOOSCI 100pf100pf 9 8 SC9012 455kHz 2. OSCILLATION FREQUENCY The oscillator frequency is 455kHz, passed by a 12 division frequency circuit, can get a 37.9 ~ 39.2 frequency; 1/3 duty carrier. In addition, The oscillator frequency divided by 256, can get the basic system work time (1.78kHz). The relation of carrier frequency (fc), internal work time period (Tm) and oscillator frequency (fosc) is given below: fc = /G2c4 1/12/G2c5 × fosc /G2c4 duty/G2d6 1/3/G2c5/G2d7 Tm = 256 / fosc/G1c4/G2c4 Tm /G2d6 the width of a high level pulse/G2c5 . 3. KEY MATRIX Key Inputs -- KI0~KI3 of SC9012 have built-in pull-down resistors, which combined 32 keys matrix with Key Outputs --KO0~KO7. Except the stated 6 double keys, Pressing other keys that are NOT intended for the double key operation do NOT generate any output. Please refer to the follow diagram for the keys input matrix of SC9012. 51 139 2117 2925 62 1410 2218 3026 73 1511 2319 3127 84 1612 2420 3228 KI0 KI1 KI2 KI3 KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 4. CUSTOMER CODE There are 8 customer codes, can be selected by using the SEL pin connected with any pin of “KO0 ~ KO7”. Please refer to follow diagram: Connected with SEL System Code (S2 S1 S0 /G2c5 K O 0 000 K O 1 001 K O 2 010 K O 3 011 K O 4 100 K O 5 101 K O 6 110 20 19 18 17 16 15 14 13 12 SEL KO 0 KO 1 KO 2 KO 3 KO 4 KO 5 KO 6 KO 7 KO 2 connected with SEL, the value of S2, S1, S0 is 0,1,0 /G3 K O 7 111 The Custom Code/G3 consists of 8 bits/G1d S0 S1 S2 S3 S4 S5 S6 S7 Among these, S0, S1, S2 can be selected with SEL Pin and any pin of“KO0 ~ KO7 ”; Bit S3 has a fixed value of“1”; B i t sS 4~S 7h a v eaf i x e dv a l u eo f“0”. 5. TRANSMISSION CODE S0 S1 S2 S3 S5S4 S6 S7 D0 D1 D2 D3 D4 D0 D1 D2 D3 D4 D5 D6 D7D5 D6 D7 Leader Code Custumer Code Customer Code Key Data Code Key Data Code S0 S1 S2 S3 S5S4 S6 S7 Refer to the above diagram, the transmission code consists of leader code, customer code, and key data code.; The leader code consists of a 4.5 ms carrier waveform followed by a 4.5 ms OFF waveform. The 8-bits customer code transmitted two times; The 8-bits key data code transmitted two times also, first is the origin code; second is the inverse code. The code uses the PPM (Pulse Position Modulation ) Method, with“0”and “1”differentiated by the time between pulses.

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 The waveforms of leader code, bit“0”and bit“1”refer to follow diagram: 4.5ms 4.5ms Tm Tm Tm=0.56msTm 3Tm Leader Code Bit“0” Bit“1” 6. DOUBLE KEY OPERATION There are 6 double keys operation, such as K21 connected with K22 ~ K24; K25 connected with K26 ~ K28, refer to the follow table: The Primary Key The Secondary Key D0 D1 D2 D3 D4 D5 D6 D7 K 2 2 10101100 K 2 3 01101100K21 K 2 4 11101100 K 2 6 10011100 K 2 7 01011100K25 K 2 8 11011100 When any of the double or multiple key combinations are pressed, except the 6 keys mentioned above, there is no output. In addition, Double Key Operation is useful for tape deck recording operation. Press the K21 or K23 key at the first then followed by the secondary key such as K22~K24; K26~K28. Please refer to the follow diagram: 1. Double Key Operation available K21(K25) Key Code Transmission T>126ms K21 (K25) K22~K24 K26~K28 K22~K24+D 5(1) Key Code Transmission (K26~K28+D5(1))

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 2. Double Key Operation disable/G3 K21(K25)K21(K25) K21(K25) K22~K24 K26~K28 K21(K25) K22~K24 K26~K28 K22~K24 K26~K28 K21(K25) Case One Case Two Case Three Transmission Disable K21(K25) Key Code Transmission No transmission T>126ms -36ms<t<36ms 36ms<t<126ms No transmission 7. REMOTE OUTPUT WAVEFORMS /G3 64Tm A word Transmission Another word Transmission when pressed continuos 192Tm192Tm Customer Code Key Data Code 8Tm 8Tm 16Tm 4Tm 2Tm Tm 8Tm 8Tm 16Tm Tm 4Tm S0=1 4Tm /G2d6 Tm=256/fosc =0.56ms(fosc=455kHz) Key Pressed Data Transmission Wavefroms Leader Code Customer Code 8Tm 8Tm 16Tm Tm 2Tm S0=0 2Tm /G2d6 Key Data Code

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 8. SC9012 DATA CODE The Keys Data Code is given in the table below. Connection Data Code Key No. K0 K1 K2 K3 KI/O D0 D1 D2 D3 D4 D5 D6 D7 K1 • 00000000 K2 • 10000000 K3 • 01000000 K4 • KO0 11000000 K5 • 00100000 K6 • 10100000 K7 • 01100000 K8 • KO1 11100000 K9 • 00010000 K10 • 10010000 K11 • 01010000 K12 • KO2 11010000 K13 • 00110000 K14 • 10110000 K15 • 01110000 K16 • KO3 11110000 K17 • 00001000 K18 • 10001000 K19 • 01001000 K20 • KO4 11001000 K21 • 00101000 K22 • 10101000 K23 • 01101000 K24 • KO5 11101000 K25 • 00011000 K26 • 10011000 K27 • 01011000 K28 • KO6 11011000 K29 • 00111000 K30 • 10111000 K31 • 01111000 K32 • KO7 11111000

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 TYPICAL APPLICATION CIRCUIT 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 KI0 KI1 KI2 KI3 D OUT VDD NC OSCO OSCI Vss SEL KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7 LMP SC9012 100pf 100pf 455kHz 1K/Ga1 radiation diode 47/Gad F VDD =3V 2/Ga1 Indication LED Select Customer Code Key Matrix 270/Ga1 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 CHIP TOPOGRAPHY /G3 1819201234 89 1 0 /G3 /G3 Size: 1.25 x 1.47 mm2 PAD COORDINATES (Unit:µm) No. Symbol X Y No. Symbol X Y 1 P1 -2.5 550.2 11 P11 438.6 -674.0 2 P2 -142.3 550.2 12 P12 432.7 -455.3 3 P3 -282.1 550.2 13 P13 432.7 -315.2 4 P4 -422.4 550.2 14 P14 432.7 -175.6 5 P5 -564.0 -208.0 15 P15 432.7 -35.7 6 P6 -564.0 -348.0 16 P16 432.7 107.7 7 P7 -564.0 -488.3 17 P17 432.7 243.8 8 P8 -554.7 -671.2 18 P18 438.9 550.2 9 P9 -178.8 -671.2 19 P19 278.7 550.2 10 P10 -39.9 -671.2 20 P20 137.4 550.2 Note: The original point of the coordinate is the die center.

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 PCB WIRE LAYOUT SCHEMATIC: Transmitting tube output ground line The transmitting tube ground line and IC ground line should layout separated or overstriking ground line. The above IC only use to hint, not to specified. Note:/G2d6 * In wire layout, the power filter capacitor should near to IC. * In wire layout, should avoid power line and ground line too long. * Recommended infrared transmit unit and IC ground line should layout separated, or overstriking lines. * The emitter of triode connect 1/Ga1 resistor at least. * Recommended triode use 9014.

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 PACKAGE OUTLINE SOP-20-300-1.27 UNIT: mm 7.8 /G66 0.4 5.3 /G66 0.3 7.62(300) 12.70/G66 0.25 11.43 1.27 0.45/G66 0.10 2.25MAX 0.15/G66 0.05 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3 /G3

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 2.1 2002-02-28 /G3 Attach

Revision History

2001.11.12 2.0 2002.02.28 2.1 Add the“Ordering information” Modify the“Typical application circuit” Add the“PCB wire layout schematic” Modify the“Package outline” /G3