Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
1
INFRARED REMOTE CONTROL
TRANSMITTER
DESCRIPTION
The SC6122 is a remote control transmitter utilizing CMOS
Technology specially designed for use on infrared remote control
applications. It is capable of controlling 64 function keys and 3
double keys. SC6122 is housed in a 24-pins SO package.
FEATURES
* CMOS Technology
* Low Operating Voltage (V
DD
=2.0~5.5V)
* Using SEL pin, SC6122 can support 128+6 function codes
* Customer Code can be selected
APPLICATIONS
* TV and VCR
* Audio Equipment
* Air Conditioner
* VCD and DVD ROM/Player
* Moniputer/Multi-Media Personal Computer System
SOP-24
ORDERING INFORMATION
SC6122-001
SC6122-002
ROM Content=0
Custom Version
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
KI2
KI3
KI4
KI5
KI6
KI7
REM
V
DD
SEL
OSCO
OSCI
V
ss
KI1
KI0
CCS
KI/O0
KI/O1
KI/O2
KI/O3
KI/O4
KI/O5
KI/O6
KI/O7
LMP
SC6122
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
2
BLOCK DIAGRAM
Key
Input
Scan
Circuit
OSC Circuit
Timing
Generation
&Control Circuit
Code Generation Circuit
Key Input/Output Scan Circuit
Optput
Control
Circuit
KI0
KI1
KI2
KI3
KI4
KI5
KI6
KI7
KI/O0 KI/O1 KI/O2 KI/O3 KI/O4 KI/O5 KI/O6 KI/O7
CSS
LMP
REM
SEL
OSCI
OSCO
V
DD
Vss
24
23
2
1
4
3
6
5
10
11
8
12
7
9
22
13
20
21
18
19
16
17
14
15
ABSOLUTE MAXIMUM RATING
(Tamb=25
C,
unless otherwise specified)
Characteristic Symbol Value
Unit
Supply Voltage
V
DD
6.0
V
Input Voltage
V
IN
-0.3~VDD
V
Power Dissipation
Pd
250
mW
Storage Temperature
T
stg
-40~+125
C
Operating Temperature
T
opr
-20~+75
C
RECOMMENDED OPERATING CONDITIONS
(Tamb=25
C,
unless otherwise specified)
Characteristic Symbol
Min.
Typ.
Max.
Unit
Supply Voltage
V
DD
2.0
3.0
3.3
V
Oscillation Frequency
fosc
400
455
500
KHz
Input Voltage
V
IN
0
--
V
DD
V
Custom Code Select Pull-Up
Resistance
Rup
--
100
--
K
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
3
ELECTRICAL CHARACTERISTICS
(Tamb=25
C,
V
DD
=3.0V,unless otherwise specified)
Parameter Symbol
Test
conditions
Min
Typ
Max
Unit
Supply Voltage
V
DD
2.0
3.0
5.5
V
Current Consumption 1
I
DD1
Fosc =455KHz
0.1
1.0
mA
Current Consumption 2
I
DD2
Fosc =STOP
1.0
A
REM High Level Output Current
I
OH1
Vo=1.5V
-5.0
-8.0
mA
REM Low Level Output Current
I
OL1
Vo=0.3V
15
30
A
LMP High Level Output Current
I
OH2
Vo=2.7V
-15
-30
A
LMP Low Level Output Current
I
OL2
Vo=0.3V
1
1.5
mA
KI High Level Input Current
I
IH1
V
IN
=3.0V
5
30
A
KI Low Level Input Current
I
IL1
V
IN
=0V
-0.2
A
KI High Level Input Voltage
V
IH1
0.7 V
DD
V
DD
V
KI Low Level Input Voltage
V
IL1
0
0.3 V
DD
V
KI/O High Level Input Voltage
V
IH2
0.7 V
DD
V
DD
V
KI/O Low Level Input Voltage
V
IL2
0
0.4
V
KI/O High Level Input Current
I
IH2
V
IN
=3.0V
2
7
A
KI/O Low Level Input Current
I
IL2
V
IN
=0V
-0.2
A
KI/O High Level Output Current
I
OH3
Vo=2.5V
0.5
1.5
mA
KI/O Low Level Output Current
I
OL3
Vo=1.7V
1.5
2.5
mA
CCS Low Level Input Voltage
V
IH3
1.1
V
CCS High Level Input Current
I
IH3
Pull Up V
IN
=3.0V
0.2
A
CCS Low Level Input Current
I
IL3
Pull Up V
IN
=0V
-3
-15
A
CCS High Level Input Current
I
IH4
Pull Down V
IN
=3.0V
5
30
A
CCS Low Level Input Current
I
IL4
Pull Down V
IN
=0V
-0.2
A
PIN DESCRIPTION
Pin No.
Symbol
I/O
Description
23,24,1~6
KI0~KI7
I
Key Input Pin Nos. 0~7
7
REM
O
Data Output Pin
8
V
DD
--
Power Supply
9
SEL
I
Select Pin
10
OSCO
O
Oscillator Pin
11
OSCI
I
Oscillator Pin
12
Vss
--
Power Supply
13
LMP
--
Output LED Indicator
21~14
KI/O0~KI/O7
I/O
Key Input/Output Pin Nos.0~7
22
CCS
I
Custom Code Scan Input Pin
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
4
FUNCTIONAL DESCRIPTION
1. TRANSMISSION CODE
The transmission code consists of a leader code, 16-bits custom codes, and 8-bits data codes. The inverse
code of the data code is also sent simultaneously. The following diagram shows this one frame construction.
C0 C1 C2 C3
C5
C4
C6 C7
D0 D1 D2 D3 D4
D0 D1 D2 D3 D4 D5 D6 D7
C0'
C0
C0'
C1
C0'
C2
C0'
C3
C0'
C4
C0'
C5
C0'
C6
C0'
C7
D5 D6 D7
Leader
Code
Custom Code
8 bits
Custom Code'
8 bits
Key Data
8 bits
Key Data
8 bits
The leader codes consist of a 9ms carrier waveform followed by a 4.5ms OFF waveform. It is used as the leader
for the following code. Thus, when reception is configured by a microcomputer, the time relationship between the
reception detection and other processes can be managed efficiently. The code uses the PPM (Pulse Position
Modulation) Method, with "0" and "1" differentiated by the time between pulses. Each code consists of 8 bits, and
simultaneous transmission of the inverse code allows configuration of a system with an extremely low error rate.
2. KEY INPUT MATRIX
The Key Input Matrix of SC6122 if given below:
5
1
13
9
21
17
29
25
6
2
14
10
22
18
30
26
7
3
15
11
23
19
31
27
8
4
16
12
24
20
32
28
37
33
45
41
53
49
61
57
38
34
46
42
54
50
62
58
39
35
47
43
55
51
63
59
40
36
48
44
56
52
64
60
KI0
KI1
KI2
KI3
KI4
KI5
KI6
KI7
KI
/
O
0
KI
/
O
1
KI
/
O
2
KI
/
O
3
KI
/
O
4
KI
/
O
5
KI
/
O
6
KI
/
O
7
3. KEY INPUT
A total of 64 keys can be connected by SC6122 Key Input Pins--KI0~KI7 and the Timing Signal Output Pins
KI/O0~KI/O7.
Double Key Operation is possible for only Key No.21 in combination with other keys connected to the KI/O5 line
namely: Key No.22,23 or 24.thus, only the following key combinations may be used for the double key operation:
1. Key Nos.21 and 22 ;
2. Key Nos.21 and 23 ;
3. Key Nos.21 and 24
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
5
Pull-down resistors are connected between the Key Input and Vss Pins. When more than one key (except the
double key combinations:K21+22, K21+23, K21+24) are pressed simultaneously, the transmission output stops.
Two key inputs are regarded as being pressed simultaneously when the time interval between these two key
entries is less than 36ms.
The order of priority given to two key inputs with a time interval of more than 36ms is on a First-Pressed-First-
Served or Longer-Pressed-First-Served Basis.
When a key is pressed, the custom and data codes are read. 36ms later, the Remote (REM) Output is activated.
When the key is kept depressed during this 36ms, one transmission is outputted. If the key is depressed for more
than 108ms, then the only the leader code is transmitted continuously.
4. DOUBLE KEY OPERATION
Double Key Operation is useful for operations such as tape deck recording. The following table shows the Key
Data corresponding to the double keys pressed. Also refer to the Key Input Section.
The Double Key operation forms are as follows:
Key D0 D1 D2 D3 D4 D5 D6 D7
K21+K22
1
0
1
0
1
1
0
0/1
K21+K23
0
1
1
0
1
1
0
0/1
K21+K24
1
1
1
0
1
1
0
0/1
Note: D7=1 when SEL is connected to V
SS
, or D7=0 when SEL is connected to V
DD
.
K21
K22 to 24
t >126ms
K21 Transmission
D5+K22 to 24
Transmission
OPERATION
K21
K22 to 24
push
push
36ms< t <126ms
K21 Transmission
No Transmission
NO OPERATION
K21
K22 to 24
-36ms< t < 36ms
No Transmission
NO OPERATION
K21
K22 to 24
t >126ms
NO OPERATION
K22 to 24 Transmission
No Transmission
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
6
5. REMOTE OUTPUT WAVEFORMS
The Remote Output Waveforms are given in the diagram below:
Ex. fosc=455KHz
Min.
36ms
58.5 to 76.5ms
108ms
108ms
9ms
4.5ms
Custom Code
8bits
Custom
Code
Data Code
8bits
Data Code
8bits
13.5ms
Leader
Code
18ms to 36ms
27ms
58.5ms to 76.5ms
9ms
4.5ms
13.5ms
2.25ms
0
0
0
1
1
1
1.125ms
0.56ms
9ms
11.25ms
0.56ms
2.25ms
8.77
s
26.3
s
9ms to 0.56ms
Carrier Frequency---Fc=fosc/12=38KHz
1
2
3
1
2
3
Carrier
Key ON
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
7
SC6122 KEYS DATA CODE
The Keys Data Code is given in the table below.
Connection Data
Code
Key
No.
KI0 KI1 KI2
KI3 KI/O
D0
D1
D2 D3 D4 D5 D6 D7
K1
0
0
0
0
0
0
0
0/1
K2
1
0
0
0
0
0
0
0/1
K3
0
1
0
0
0
0
0
0/1
K4
KI/O0
1
1
0
0
0
0
0
0/1
K5
0
0
1
0
0
0
0
0/1
K6
1
0
1
0
0
0
0
0/1
K7
0
1
1
0
0
0
0
0/1
K8
KI/O1
1
1
1
0
0
0
0
0/1
K9
0
0
0
1
0
0
0
0/1
K10
1
0
0
1
0
0
0
0/1
K11
0
1
0
1
0
0
0
0/1
K12
KI/O2
1
1
0
1
0
0
0
0/1
K13
0
0
1
1
0
0
0
0/1
K14
1
0
1
1
0
0
0
0/1
K15
0
1
1
1
0
0
0
0/1
K16
KI/O3
1
1
1
1
0
0
0
0/1
K17
0
0
0
0
1
0
0
0/1
K18
1
0
0
0
1
0
0
0/1
K19
0
1
0
0
1
0
0
0/1
K20
KI/O4
1
1
0
0
1
0
0
0/1
K21
0
0
1
0
1
0
0
0/1
K22
1
0
1
0
1
0
0
0/1
K23
0
1
1
0
1
0
0
0/1
K24
KI/O5
1
1
1
0
1
0
0
0/1
K25
0
0
0
1
1
0
0
0/1
K26
1
0
0
1
1
0
0
0/1
K27
0
1
0
1
1
0
0
0/1
K28
KI/O6
1
1
0
1
1
0
0
0/1
K29
0
0
1
1
1
0
0
0/1
K30
1
0
1
1
1
0
0
0/1
K31
0
1
1
1
1
0
0
0/1
K32
KI/O7
1
1
1
1
1
0
0
0/1
(to be continued)
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
8
(continued)
Connection Data
Code
Key
No.
KI4 KI5 KI6
KI7 KI/O
D0
D1
D2 D3 D4 D5 D6 D7
K33
0
0
0
0
0
0
1
0/1
K34
1
0
0
0
0
0
1
0/1
K35
0
1
0
0
0
0
1
0/1
K36
KI/O0
1
1
0
0
0
0
1
0/1
K37
0
0
1
0
0
0
1
0/1
K38
1
0
1
0
0
0
1
0/1
K39
0
1
1
0
0
0
1
0/1
K40
KI/O1
1
1
1
0
0
0
1
0/1
K41
0
0
0
1
0
0
1
0/1
K42
1
0
0
1
0
0
1
0/1
K43
0
1
0
1
0
0
1
0/1
K44
KI/O2
1
1
0
1
0
0
1
0/1
K45
0
0
1
1
0
0
1
0/1
K46
1
0
1
1
0
0
1
0/1
K47
0
1
1
1
0
0
1
0/1
K48
KI/O3
1
1
1
1
0
0
1
0/1
K49
0
0
0
0
1
0
1
0/1
K50
1
0
0
0
1
0
1
0/1
K51
0
1
0
0
1
0
1
0/1
K52
KI/O4
1
1
0
0
1
0
1
0/1
K53
0
0
1
0
1
0
1
0/1
K54
1
0
1
0
1
0
1
0/1
K55
0
1
1
0
1
0
1
0/1
K56
KI/O5
1
1
1
0
1
0
1
0/1
K57
0
0
0
1
1
0
1
0/1
K58
1
0
0
1
1
0
1
0/1
K59
0
1
0
1
1
0
1
0/1
K60
KI/O6
1
1
0
1
1
0
1
0/1
K61
0
0
1
1
1
0
1
0/1
K62
1
0
1
1
1
0
1
0/1
K63
0
1
1
1
1
0
1
0/1
K64
KI/O7
1
1
1
1
1
0
1
0/1
Note: D7=1 when SEL is connected to V
SS
, or D7=0 when SEL is connected to V
DD
.
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
9
TYPICAL APPLICATION CIRCUIT
SC6122
47
F
1
IR LED
470
LED
V
DD
455KHz
200pF
200pF
IN41
48
IN41
48
IN41
48
IN41
48
IN41
48
IN41
48
IN41
48
IN41
48
100K
100K
100K
100K
100K
100K
100K
100K
For Custom
Code Selection
V
DD
V
DD
KI0
KI1
KI2
KI3
KI/O0
KI/O2
KI/O3
KI/O4
KI/O5
KI/O1
KI/O6
KI/O7
CCS
V
SS
SEL
REM
LMP
V
DD
OSCO
OSCI
3
4
5
6
11
10
8
13
7
22
12
9
21
20
19
18
17
16
15
14
23
24
1
2
KI4
KI5
KI6
KI7
VDD
0.1
F
47
F
270
Note:1. Two capacitance connect with Vcc should as near as possible.
2. The line between two capacitance and Vcc and ground should as short as possible.
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
10
CHIP TOPOGRAPHY
Size: 1.84 x 1.46 mm
2
PAD COORDINATES
(Unit:
m)
No. Symbol
X
Y
No. Symbol
X
Y
1
P1
-602.80
-322.10
13
P13
605.70
217.90
2
P2
-602.80
-452.10
14
P14
542.00
452.00
3
P3
-350.70
-452.10
15
P15
403.50
452.00
4
P4
-220.90
-452.10
16
P16
160.40
452.00
5
P5
-89.50
-452.10
17
P17
12.50
452.00
6
P6
41.00
-452.10
18
P18
-230.30
452.00
7
P7
171.40
-452.10
19
P19
-361.30
451.90
8
P8
347.90
-452.10
20
P20
-602.50
451.90
9
P9
477.80
-452.10
21
P21
-607.50
252.40
10
P10
608.00
-452.10
22
P22
-602.80
68.50
11
P11
607.20
-176.00
23
P23
-602.80
-61.20
12
P12
607.20
-44.60
24
P24
-602.80
-191.50
Note: The original point of the coordinate is the die center.
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
11
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:
* 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.
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
12
PACKAGE OUTLINE
SOP-24-375-1.27
Unit: mm
10
.
2
B
0.
4
7.
6
B
0.
3
9.
525
(
375)
15.34
B
0.25
13.97
1.27
0.40
B
0.1
3.10MAX
0.
2
5
B
0.05
Silan
Semiconductors
SC6122
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
13
Attach
Revision History
Data
REV
Description
Page
2000.12.31
2.0
Change name of company in page footer
2001.12.12
2.1
2002.03.01
2.2
Modify the "Typical application circuit"
Add the "PCB wire layout schematic"
Modify the "Package outline"
9
11
12
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