SILAN SC6121-001, SC6121-002 Datasheet

Silan
Semiconductors

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INFRARED REMOTE CONTROL
TRANSMITTER

DESCRIPTION

The SC6121 is a remote control transmitter utilizing CMOS
Technology specially designed for use on infrared remote control
applications. It is capable of controlling 32 function keys and 3
double keys. SC6121 is housed in a 20-pins SO package.

FEATURES

* CMOS Technology
* Low Operating Voltage (V
* Using SEL pin, SC6121 can support 64+6 function codes
* Customer Code can be selected

APPLICATIONS

* TV and VCR
* Audio Equipment
* Cable TV Tuner
* Cassette Deck
* Air Conditioner
* VCD and DVD ROM/Player
* Moniputer/Multi-Media Personal Computer System

PIN CONFIGURATION

=2.0~5.5V)

DD

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SC6121

SOP-20

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ORDERING INFORMATION

SC6121-001
SC6121-002

ROM Content=0
Custom Version

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KI0

KI1

KI2

KI3

REM

V

DD

SEL

OSCO

OSCI

Vss

1
2
3
4
5
6
7
8
9

10

SC6121

CCS

20

KI/O0

19

KI/O1

18

KI/O2

17

KI/O3

16

KI/O4

15

KI/O5

14

KI/O6

13

KI/O7

12

LMP

11

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.2 2002-02-28

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Semiconductors

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BLOCK DIAGRAM

KI0

KI1

KI2

KI3

OSCI OSCO V

89 6 10

1
2
3

Key
Input
Scan

Circuit

4

OSC Circuit

Timing Generation

&Control Circuit

Code Generation Circuit

Key Input/Output Scan Circuit

1819 1617 1415 1213

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

DD

Vss

Optput

Control

Circuit

ABSOLUTE MAXIMUM RATING

Characteristic Symbol Value Unit

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

(Tamb=25°C, unless otherwise specified)

DD

IN

stg
opr

6.0 V

-0.3~VDD V

-40~+125

-20~+75

RECOMMENDED OPERATING CONDITIONS

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 --

(Tamb=25°C, unless otherwise specified)

2.0 3.0 3.3 V

0--VDDV

SC6121

SEL

7

REM

5

LMP

11

CSS

20

°C
°C

KΩ

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.2 2002-02-28

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Semiconductors

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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

1~4 KI0~KI3 I Key Input Pin Nos. 0~3

5 REM O Data Output Pin
6VDD-- Power Supply
7 SEL I Select Pin
8 OSCO O Oscillator Pin

9 OSCI I Oscillator Pin
10 Vss -- Power Supply
11 LMP -- Output LED Indicator

19~12 KI/O0~KI/O7 I/O Key Input/Output Pin Nos.0~7

20 CCS I Custom Code Scan Input Pin

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DD1
DD2
OH1
OL1
OH2
OL2

OH3
OL3

IH1
IL1

IH1

IH2

IH2
IL2

IH3
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

IL1

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

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

SC6121

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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: 1.2 2002-02-28

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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 SC6121 if given below:

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

C0

C1

Custom Code'

8bits

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

C7

Key Data

8bits

D5 D6 D7

SC6121

Key Data

8bits

KI/O0

KI/O1

KI/O2

KI/O3

KI/O4

KI/O5

KI/O6

KI/O7

KI0

KI1

KI2

KI3

51 139 2117 2925
62 1410 2218 3026
73 1511 2319 3127
84 1612 2420 3228

3. KEY INPUT

A total of 32 keys can be connected by SC6121 Key Input Pins--KI0~KI3 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: 1.2 2002-02-28

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