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Silan Semiconductors
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 20pins SO package.
SC9012
SOP-20
FEATURES
* CMOS Technology * Low Power Consumption * Built-in Oscillation Circuit * Least External Components * 32 Function Keys 8 Customer Codes Up to 256 Commands
ORDERING INFORMATION
SC9012 SOP-20 Package
APPLICATIONS
* Infrared Remote Control Transmitter Equipment * Television Remote control Equipment * VCR Remote control Equipment * VCD, Audio Equipment
* 6 Double Function Keys * LED Indication of Transmission
PIN CONFIGURATION
BLOCK DIAGRAM
OSCO
8
OSCI
9
DOUT
5
LMP
11
KI0 KI1 KI2 KI3 DOUT VDD NC OSCO OSCI
1 2 3 4 5 6 7 8 9
20 SEL
OSC Circuit Output Circuit Carrier Generation Circuit Control Circuit
10 VSS 6 VDD
19 KO0 18 KO1 17 KO2 16 KO3
NC 7 Timing Generation Frequency Division Circuit
SC9012
15 KO4 14 KO5 13 KO6 12 KO7 11 LMP
SEL 20
Customer Code Latch Circuit
Digital Circuit
Key Input Scan Circuit
Key Output Scan Circuit
Vss 10
1
2
3
4
19
18
17
16
15
14
13
12
KI0 KI1 KI2 KI3
KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
1
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ABSOLUTE MAXIMUM RATING (Tamb=>25C
Characteristic
Supply Voltage Input Voltage With Respect To Vss Output Current Power Dissipation Storage Temperature Operating Temperature
SC9012
Symbol
VDD VIN IOUT(REO) Pd Tstg TOPR
Value
-0.3 ~ 5.0 Vss-0.3 ~ VDD+0.3 -20 300 -40 ~ +125 -20 ~ +75
Unit
V V mA mW C C
ELECTRICAL CHARACTERISTICS (Tamb=25C,VDD=3V)
Parameter
Operating supply Voltage Operating Supply Current Stand-By Current Output High Level Current (Dout) Output Low Level Current (LMP) Input High Level Voltage (KI) Input Low Level Voltage (KI) Oscillation Frequency Input Pull-down Resistor (KI)
Symbol
VDD IDD ISB
Test conditions
All Function Operating fOSC=455 kHz All Keys Off Stops. Oscillation Output Floating.
Min
2.0 --
Typ
---
Max
4.0 1 1
Unit
V mA A
IOH IOL VIH VIL fosc RON
VOH=1.5V, VDD =3V VOL=1.5V, VDD =3V VDD =3V VDD =3V -VDD =3V
-10 5 0.7 VDD 0 400 100
---
--VDD 0.3 VDD
mA mA V V kHz k
455 300
600 500
PIN DESCRIPTION
Pin No.
1~4 5 6 7 8 9 10 11 12~19 20
Symbol
KI0~KI3 DOUT VDD NC OSCO OSCI VSS LMP KO0~KO8 SEL
I/O
I O --O I -O O I
Description
Key Scan Input Pins. Each pin has a built-in pull-down resistor Infrared LED Driving Output Pin Positive Power Supply No Connection. (When used, Suggest to connected with VDD) Oscillator Output Pin Oscillator Input Pin Negative Power Supply LED Display Output Pin Key Scan Output Pins Custom Code Selection Pin
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
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FUNCTIONAL DESCRIPTION
1. OSCILLATION CIRCUIT
SC9012
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.
SC9012
OSCI OSCO
9
100pf 455kHz
8
100pf
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 = 1/12 x fosc duty 1/3 Tm the width of a high level pulse .
Tm = 256 / fosc
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.
KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7
KI0 KI1 KI2 KI3
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
17 18 19 20
21 22 23 24
25 26 27 28
29 30 31 32
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
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4. CUSTOMER CODE
SC9012
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
SEL 20 KO0 19 KO1 18 KO2 17 KO3 16 KO4 15 KO5 14 KO6 13 KO7 12
System Code (S2 0 0 0 0 1 1 1 1 S1 0 0 1 1 0 0 1 1 S0 0 1 0 1 0 1 0 1
KO0 KO1 KO2
KO2 connected with SEL, the value of S2, S1, S0 is 0,1,0
KO3 KO4 KO5 KO6 KO7
The Custom Code consists of 8 bits 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"; Bits S4 ~ S7 have a fixed value of "0".
5. TRANSMISSION CODE
S0 S1 S2 S3 S4 S5 S6 S7 S0 S1 S2 S3 S4 S5 S6
S7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
Leader Code
Custumer Code
Customer Code
Key Data Code
Key Data Code
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.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
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The waveforms of leader code, bit "0" and bit "1" refer to follow diagram:
Leader Code
4.5ms 4.5ms
SC9012
Bit"0"
Tm Tm Tm=0.56ms
Bit"1"
Tm 3Tm
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 K22 K21 K23 K24 K26 K25 K27 K28 D0 1 0 1 1 0 1 D1 0 1 1 0 1 1 D2 1 1 1 0 0 0 D3 0 0 0 1 1 1 D4 1 1 1 1 1 1 D5 1 1 1 1 1 1 D6 0 0 0 0 0 0 D7 0 0 0 0 0 0
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 K21 (K25) K22~K24+D5(1) Key Code Transmission (K26~K28+D5(1))
T>126ms
K22~K24 K26~K28
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
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2. Double Key Operation disable
K21(K25) Key Code Transmission K21(K25) 36msSC9012
K21(K25) Case Three K22~K24 K26~K28 T>126ms No transmission
7. REMOTE OUTPUT WAVEFORMS
Key Pressed
64Tm
A word Transmission
Another word Transmission when pressed continuos
192Tm
192Tm
Data Transmission Wavefroms Leader Code Customer Code Customer Code Key Data Code Key Data Code
8Tm
8Tm 16Tm
4Tm 2Tm Tm
Tm=256/fosc =0.56ms(fosc=455kHz)
8Tm
8Tm 16Tm
Tm
8Tm
8Tm 16Tm
Tm
4Tm
S0=1 4Tm
2Tm
S0=0 2Tm
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
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8. SC9012 DATA CODE
The Keys Data Code is given in the table below. Key No. Connection Data Code
SC9012
K0
*
K1
*
K2
K3
KI/O
D0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
D1
0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1
D2
0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
D3
0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
D4
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
D5
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
D6
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
D7
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 K12 K13 K14 K15 K16 K17 K18 K19 K20 K21 K22 K23 K24 K25 K26 K27 K28 K29 K30 K31 K32
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
KO0
KO1
KO2
KO3
KO4
KO5
KO6
KO7
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
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TYPICAL APPLICATION CIRCUIT
SC9012
Key Matrix
Select Customer Code
20
SEL
19
KO0
18
KO1
17
KO2
16
KO3
15
KO4
14
KO5
13
KO6
12
11
KO7 LMP
SC9012
KI0 KI1 KI2 KI3 DOUT VDD NC OSCO OSCI Vss
Indication LED
1K
1
2
3
4
5
6
7
100pf
8
9
100pf
10
455kHz 47F
VDD=3V
radiation diode
270 2
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
8
Silan Semiconductors
CHIP TOPOGRAPHY
SC9012
3 2 1 20 19 18
4
17 16 15 5 6 7 8 9 10
2
14 13 12
11
Size: 1.25 x 1.47 mm
PAD COORDINATES (Unit: m)
No. 1 2 3 4 5 6 7 8 9 10 Symbol P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 X -2.5 -142.3 -282.1 -422.4 -564.0 -564.0 -564.0 -554.7 -178.8 -39.9 Y 550.2 550.2 550.2 550.2 -208.0 -348.0 -488.3 -671.2 -671.2 -671.2 No. 11 12 13 14 15 16 17 18 19 20 Symbol P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 X 438.6 432.7 432.7 432.7 432.7 432.7 432.7 438.9 278.7 137.4 Y -674.0 -455.3 -315.2 -175.6 -35.7 107.7 243.8 550.2 550.2 550.2
Note: The original point of the coordinate is the die center.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
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Silan Semiconductors
PCB WIRE LAYOUT SCHEMATIC:
SC9012
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: * 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 resistor at least. * Recommended triode use 9014.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
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Silan Semiconductors
PACKAGE OUTLINE
SC9012
UNIT: mm
SOP-20-300-1.27
0.4
5.3B
0.15B0.05
1.27 12.70B0.25 0.45B0.10
2.25MAX
11.43
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
11
7.62(300)
7.8B
0.3
Silan Semiconductors
Attach Revision History
Data
2001.11.12
SC9012
REV
2.0
Description
Add the "Ordering information"
Page
1 8 10 11
2002.02.28
2.1
Modify the "Typical application circuit" Add the "PCB wire layout schematic" Modify the "Package outline"
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
12

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