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Silan Semiconductors
FOR INFRARED REMOTE CONTROL TRANSMITTER
DESCRIPTION
The SC9148B is CMOS LSI developed for use on the infrared remote control transmitter. This LSI has 18 functions, and total 75 commands can be transimitted : 63 commands by the continuous keys of multiple keyings is possible and 12 commands by the single shot keys.
SC9148B
SOP-16
FEATURES
* Wide operating voltage range(VDD=2.2V ~ 5.0V) * CMOS structure assures extremely low power dissipation * Mulitiple keying is possible * Less external parts * Adaptable to other Models as Code Bits are available * An oscillator can be constructed only by connecting an LC or Ceramic Resonater as the oscillation circuit is housed.
DIP-16
ODERING INFORMATION
SC9148B SC9148S
Advanced version. All functions same as SC9148. DIP-16 package. Advanced version. SOP-16 package.
BLOCK DIAGRAM
GND 1 XT XT 2 3 Decoder OSC Devider VDD 16
Hold/Single pulse signal generator
Output Synthesizing Circuit
15
Tx OUT
K1 K2 K3
4 5 6 Key Input Circuit Timing Signal generating circuit 7 K4 8 K5 9 K6 10 T1 11 T2 12 T3 Code Bit signal Generating Circuit 13 CODE
14
TEST
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Rev: 2.1 2002.09.10.
1
Silan Semiconductors
ABSOLUTE MAXIMUM RATINGS
Characteristic
Supply Voltage(Pin 16) Input/Output Voltage Power Dissipation Operating Temperature Storage Temperature
SC9148B
Symbol
VDD VIN,VOUT PD Tamb Tstg
Value
6.0 Vss-0.3V ~ VDD+0.3V 200 -20 ~ +75 -55~+125 VDD=3.0V,Unless otherwise specified)
Unit
V V mW C C
ELECTRICAL CHARACTERISTICS(Tamb=25C
Parameter
Operating Supply Voltage Operating supply current Quiescent Current comsuption K1~K6 Input "H" Level CODE Voltage "L" Level K1~K6 Input "H" Level Current "L" Level CODE Input "H" Level TEST Current "L" Level T1~T3 Output "H" Level Current "L" Level Input Termianl Output Terminal Tx Output "H" Level Current "L" Level
Symbol
VDD IDD IDS VIH VIL IIH IIL IIH IIL IOH IOL IOH IOL Rf fOSC
Test conditions
All function operation Key ON, without load All key OFF stop of OSC
Min
2.2
Typ
Max
5.0 1.0 1.0 3.0 0.5 60 1.0 1.0 60
Unit
V mA A V V A A A A A A mA mA
VIH=3.0V VIL=0V VIH=3.0V VIL=0V VOH=2.0V VOL=3.0V VOH=2.0V VOL=3.0V
2.0 0 20 -1.0 -1.0 20 -500 50 -0.1 1.0
30
30
OSC Feedback resistor Oscillation frequency
400
500 455
600
k kHz
PIN DESCRIPTION
Pin No.
1,16 2,3
Symbol
GND,VDD XT, non-XT
Terminal
Termial for OSC
Function/operation
Supply Voltage Terminal Terminal for OSC, and used for connecting a 455kHz ceramic resonater etc. (with a built-in feedback resistor) Key input Terminal for key matrix. 18 keys can be connected at T1~T3 x K1~K6 (with a built-in pull-down resistor) Digit timing output terminal for key matrix. Terminal for matching code between transmitting and receiving Keep this terminal open Transmitting signal output. Modulation is made by 12 bits 1 cycle and 38kHz carrier wave.
4~9
K1~K6
Key Input terminal
10~12 13 14 15
T1~T3 CODE Non-TEST Tx Out
Timing Signal Output Terminal Code bit input Terminal Test terminal Transmitting output terminal
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Rev: 2.1 2002.09.10.
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Silan Semiconductors
FUNCTIONAL DESCRIPTION
1. OSCILLATION CIRCUIT
SC9148B
As the self-bias type amplifier by means of CMOS inverter has been housed, the oscillation circuit can be constructed when LC or ceramic resonater is connected. When oscillation frequency is set at 455kHz, carrier wave of transmitting signal is set at 38kHz, oscillation of the oscillation circuit is kept stopped unless the keys are operated, thus reducing power consumption.
Rf
Rf
2
C1
3
C2 C1 C1=C2=50~150pF
2
3
C2
2. KEY INPUT
18 keys can be connected by key input K1~K6 and 6 x3 matrix by means of timing signal T1~T3 . Multiple keying is possible for the keys connected to T1 line up to sextet , and all key inputs are output . (Output becomes continuous pulses .) Between the timing signal lines , priority has been decided in order of T1, T2 , T3 . The keys connected to T2 and T3 lines have priority and input is made through more than 2 keys , single signal is preferentially output in order of K1~K6 . Further , the keys connected to T2 and T3 lines are for single and not second signal is transmitted unless input is made again after the key is released once.
T1 K1 K2 K3 K4 K5 K6 1 2 3 4 5 6 (H)
T2 7 8 9 10 11 12 (S1)
T3 13 14 15 16 17 18 (S2)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Rev: 2.1 2002.09.10.
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Silan Semiconductors
KEY MATRIX Key No.1~6
Continuous key output with it pressed, and multiple keying is possible.
SC9148B
Key No.7~18
These keys are the single-shot keys and when input is made, signal is output only one time.
3. TRANSMISSION COMMAND
Transmission command is in one word 12-bits configuration. C1~C3 are code bits adaptable to many models, H,S1 and S2 continous signal and single-shot signal codes ,and D1~D6 are Key input data codes in 6-bits. C1 C2 C3 H S1 S2 D1 D2 D3 D4 D5 D6
4. DATA CODE
DATA Key No. H S1 S2 D1 D2 D3 D4 D5 D6 1 2 3 4 5 6 7 8 9
Output Form
DATA Key No. H S1 S2 D1 D2 D3 D4 D5 D6 10 11 12 13 14 15 16 17 18 010000100 010000010 010000001 001100000 001010000 001001000 001000100 001000010 001000001
Output Form
Single-shot Single-shot Single-shot Single-shot Single-shot Single-shot Single-shot Single-shot Single-shot
1 0 0 1 0 0 0 0 0 Continuous 1 0 0 0 1 0 0 0 0 Continuous 100001000
Continuous
1 0 0 0 0 0 1 0 0 Continuous 1 0 0 0 0 0 0 1 0 Continuous 1 0 0 0 0 0 0 0 1 Continuous 0 1 0 1 0 0 0 0 0 Single-shot 0 1 0 0 1 0 0 0 0 Single-shot 0 1 0 0 0 1 0 0 0 Single-shot
As the multiple keying is possible , key No .1~6 are capable of output 63 commands through a combination of D1~D6 data . Key No . 7~18 are the single-shot keys for output 12 commands , and 75 commands can be output through a combination of continuous key (multiple keying is possible ) and single-shot key .
5. CODE BITS(C1,C2,C3)
Code bit can be made at one terminal with diodes connected through T1 ~ T3 timing terminals . CODE BIT C1 C2 C3 C2 0 1 1 CODE BIT "0","0" CAN NOT BE USED
13 CODE
12 T3
(C3)
11 T2
(C2)
10 T1
(C1)
9
C1,C2 IS FOR SC9150A C2,C3 IS FOR SC9149A
1 0 1
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Rev: 2.1 2002.09.10.
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Silan Semiconductors
SC9148B
Data of C1 , C2 and C3 code bit become "1" when diodes are connected to CODE Terminal through Timing Signal Terminals T1 ~T3, and `0' when not connected . (In the above diagram , C1 , C2 and C3 are "1" , "1" and "1" data . ) The SC9148P has 3 code bits . However , the SC9149P that is a receiving IC ( DIP 16 PIN ) and the SC9150P (DIP 24 PIN ) are able to use only C2 and C3 , and C1 and C2 2 code bits , respectively . Therefore , diodes must be connected so that code bit data of the SC9148P agreement with the receiving IC . Note : For C3 and C1 code bit data not used on the SC9150P and SC9149P , it is necessary to transmit `1' and diodes must be so connected .
6. TRANSMITTING WAVEFORM 6.1 BASIC TRANSMITTING WAVEFORM (at fosc=455kHz) C1~C3: CODE BIT READER H,S1,S2: HOLD/SINGLE PULSE READER K1~K6: KEY INPUT READER C1 C2 C3 H S1 S2 K1
K2
K3
K4
K5
K6
a 3a 48a
Basic transmitting waveform is 12-bits serial data in configuration as shown above. The time of each bit " a" is decided as shown below by oscillation frequency fosc by means of XT and non-XT. a=(1/fosc)x192(sec)
6.2 DISTINCTION OF BIT "0" AND "1"
a BIT "0" 3a BIT "1" 0 1 0 1 0 0 1 0 0 1 0 0
One word of the above transmission command is in the configuration of (010100100100).
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Rev: 2.1 2002.09.10.
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Silan Semiconductors
6.3 SINGLE-SHOT SIGNAL
SC9148B
Single-shot KEY ON
60a
48a
80a
48a
Tx OUT
When any one of the single-shot keys is depressed , the above single-shot signal is transmitted in 2 cycles, and the transmitting output ends.
6.4 CONTINUOUS SIGNAL
Continuous KEY ON 60a 48a 80a 48a 208a 48a 80a 48a
Tx OUT
When any one of the continuous keys is depressed, the above continuous signal is 2 cycles output, repeatedly output 208a pause and 2 cycles is 2 pause of 208a.
6.5 CARRIER WAVE
About 50~100mA current is normally applied through an infrared LED in order to extend an infrared ray reaching distance. Therefore, if a time, when LED is ON, is shortened as could as possible , it leads to reduction in power consumption. On this IC, when single-shot or continuous signal is transmitting, each bit is switching by a carrier of duty 1/3, output after the pulse modulated. Carrier(fc) is decided by oscillation frequency fosc by means of XT and non-XT, fc=fosc/12(Hz), fc=38kHz at fosc=455kHz.
Transmitting Signal Pulse Modulated Transmitting Signal
"1"
"0"
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Rev: 2.1 2002.09.10.
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Silan Semiconductors
APPLICATION CIRCUIT
SW
2SA1015
SC9148B
VDD=3V
2SC1815 TLN105
F
47
10k
IN4148
16
VDD
15
TEST
10
14
13
12
T3
11
T2
10
T1
9
K6
Tx OUT CODE
SC9148B
GND XT XT K1 K2 K3 K4 K5
1
100pF
2
3
100pF
4
100pF
5
100pF
6
100pF
7
100pF
8
100pF 100pF
K1~K6 KEY MATRIX
1 7 13
2 8 14
3 9 15
4 10 16
5 11 17
6 12 18
T1~T3
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Rev: 2.1 2002.09.10.
7
Silan Semiconductors
PACKAGE OUTLINE
SC9148B
UNIT:mm
2.54
DIP-16-300-2.54
0.25
6.35B
1.52 +0.3 -0 19.55B0.3
7.62
15 degree
0.5MIN 3.00MIN
0.46B0.08
SOP-16-225-1.27
1.80MAX
4.36MAX
1.27MAX
0.4
0.3
6.0B
3.9B
1.27
10.15B0.25
0.4B0.1
0.2 +0.05 -0.02
8.89
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Rev: 2.1 2002.09.10.
8
5.72
0.25B
0.05
UNIT:mm
Silan Semiconductors
Attach Revision History
Data
2000.12.31 2002.05.27 2002.09.10
SC9148B
REV
1.0 2.0 2.1 Original
Description
Modify the "SC9148A" to "SC9148B" Modify the "PACKAGE OUTLINE" Modify the "APPLICATION CIRCUIT"
Page
8 7
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Rev: 2.1 2002.09.10.
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