SILAN SC6122-001, SC6122-002 Datasheet

Silan
Semiconductors

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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
* 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

PIN CONFIGURATION

=2.0~5.5V)

DD

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KI2

KI3

KI4

KI5

KI6

KI7

REM

V

DD

SEL

OSCO

OSCI

V

ss

1
2
3
4
5
6
7
8

9
10
11
12

SC6122

24
23
22
21
20
19
18
17
16
15
14
13

SC6122

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ORDERING INFORMATION

SC6122-001
SC6122-002

KI1

KI0

CCS

KI/O0

KI/O1

KI/O2

KI/O3

KI/O4

KI/O5

KI/O6

KI/O7

LMP

ROM Content=0
Custom Version

SOP-24

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HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.2 2002-03-01

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Semiconductors

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BLOCK DIAGRAM

KI0

23

KI1

24

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OSCI OSCO V

1011 8 12

OSC Circuit

SC6122

DD

Vss

SEL

9

KI2

KI3

KI4

KI5

KI6

KI7

1

Key

2
3

Input
Scan

Circuit

4
5
6

Timing

Generation

&Control Circuit

Code Generation Circuit

Key Input/Output Scan Circuit

Optput

Control

Circuit

13

22

REM

7

LMP

CSS

2021 1819 1617 1415

KI/O0 KI/O1 KI/O2 KI/O3 KI/O4 KI/O5 KI/O6 KI/O7

ABSOLUTE MAXIMUM RATING

(Tamb=25°C, unless otherwise specified)

Characteristic Symbol Value Unit

Supply Voltage V
Input Voltage V
Power Dissipation Pd 250 mW
Storage Temperature T
Operating Temperature T

DD

IN

stg
opr

6.0 V

-0.3~VDD V

-40~+125

-20~+75

°C
°C

RECOMMENDED OPERATING CONDITIONS

(Tamb=25°C,unless otherwise specified)

Characteristic Symbol Min. Typ. Max. Unit

Supply Voltage V
Oscillation Frequency fosc 400 455 500 KHz
Input Voltage V
Custom Code Select Pull-Up
Resistance

DD

IN

Rup -- 100 --

2.0 3.0 3.3 V

0--VDDV

KΩ

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.2 2002-03-01

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ELECTRICAL CHARACTERISTICS

Parameter Symbol Test conditions Min Typ Max Unit

Supply Voltage V
Current Consumption 1 I
Current Consumption 2 I
REM High Level Output Current I
REM Low Level Output Current I
LMP High Level Output Current I
LMP Low Level Output Current I
KI High Level Input Current I
KI Low Level Input Current I
KI High Level Input Voltage V
KI Low Level Input Voltage V
KI/O High Level Input Voltage V
KI/O Low Level Input Voltage V
KI/O High Level Input Current I
KI/O Low Level Input Current I
KI/O High Level Output Current I
KI/O Low Level Output Current I
CCS Low Level Input Voltage V
CCS High Level Input Current I
CCS Low Level Input Current I
CCS High Level Input Current I
CCS Low Level Input Current I

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
8VDD-- 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

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DD1
DD2
OH1
OL1
OH2
OL2

OH3
OL3

IH1
IL1

IH2
IL2

IH3
IL3
IH4
IL4

(Tamb=25°C,VDD=3.0V,unless otherwise specified)

DD

Fosc =455KHz 0.1 1.0 mA

Fosc =STOP 1.0

Vo=1.5V -5.0 -8.0 mA
Vo=0.3V 15 30
Vo=2.7V -15 -30
Vo=0.3V 1 1.5 mA

VIN=3.0V 5 30

VIN=0V -0.2

IH1
IL1
IH2
IL2

VIN=3.0V 2 7

VIN=0V -0.2
Vo=2.5V 0.5 1.5 mA
Vo=1.7V 1.5 2.5 mA

IH3

Pull Up VIN=3.0V 0.2

Pull Up VIN=0V -3 -15

Pull Down VIN=3.0V 5 30

Pull Down VIN=0V -0.2

SC6122

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2.0 3.0 5.5 V

µA

µA
µA

µA
µA

0.7 V

DD

00.3V

0.7 V

DD

00.4V

1.1 V

V

V

DD

DD

DD

V
V
V

µA
µA

µA
µA
µA
µA

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.2 2002-03-01

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Semiconductors

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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'

C0'

C0 C1 C2 C3 C5C4 C6 C7

Leader

Code

Custom Code

8bits

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:

C0'C2C0'C3C0'C4C0'C5C0'C6C0'

C0

C1

Custom Code'

KI/O0

8bits

D0 D1 D2 D3 D4 D0 D1 D2 D3 D4 D5 D6 D7

C7

KI/O1

KI/O2

KI/O3

KI/O4

KI/O5

Key Data

8bits

KI/O6

D5 D6 D7

KI/O7

SC6122

Key Data

8bits

KI0

KI1

KI2

KI3

KI4

KI5

KI6

KI7

51 139 2117 2925
62 1410 2218 3026
73 1511 2319 3127

84 1612 2420 3228
3733 4541 5349 6157
3834 4642 5450 6258
3935 4743 5551 6359
4036 4844 5652 6460

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

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.2 2002-03-01

4

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