SILAN SC2268, SC2268-00 Datasheet

Silan
Semiconductors

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REMOTE CONTROL ENCODER

DESCRIPTION

The SC2268 is a remote control encoder utilizing CMOS
Technology specially designed for use with the SC2128. Using a
special coding technique, SC2268 increases noise immunity to a
very great extent. It is housed in 16-Pins DIP Package and has a
maximum of eight input channels. Its high performance features
makes SC2268 a must in every fan and other electrical home
appliance remote control application.

FEATURES

* CMOS Technology
* Low power consumption
* Very high noise immunity
* Wide range of operating voltage: Vcc=2.2 ~ 5.0 Volts
* Transmits signals to a maximum of 8 channels
* Start wordcustom code options available

APPLICATIONS

* Fan remote control
* Air cleaner
* Humidifier
* Heater

PIN CONFIGURATION BLOCK DIAGRAM

15

I1

1

I2

2

I3

3

I4

4

SC2268

I5

5

I6

6

I7

7

I8

8

Vcc

16

OSCI

15

OSCO

14

Tx

13

OUT
C4

12

C5

11

C6

10

Vss

9

OSCI

OSCO

I1
I2
I3
I4
I5
I6
I7
I8

OSC

14

1
2
3

Key input

4

scanning

5
6
7
8

and

sampling

SC2268

ORDERING INFORMATION

SC2268
SC2268-00

Timing

circuit

Encoder

12 11 10
C4 C5 C6

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DIP-16

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Custom Cord C3=1
Custom Cord C3=0

Vcc Vss

16 9

Output
Waveform
Generator

13

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Tx OUT

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0 2000.12.31

1

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Silan
Semiconductors

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ABSOLUTE MAXIMUM RATINGS

Characteristic Symbol Value Unit

Supply Voltage V
Input/Output Voltage VIN/V
PowerDissipation P
Operating Temperature Topr -20 ~ +70
Storage Temperature Tstg -55 ~ +125

ELECTRICAL CHARACTERISTICS

Parameter Symbol Test conditions Min Typ Max Unit

Operating Voltage V
Operating Current(note) I

Standy-by Current I

Sinking Current of TxOUT I

Input Voltage of
I1 ~I8

Input Pull-Low Resistor R
Input Pull-High Resistor R
Oscillation frequency f
Note: For pins I1 ~ I8 : Any one of the said pins is set to HIGH while the others are set to LOW.

High Level V

Low level V

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CC

OUT

D

(Tamb=0 ~ 70°C,VCC-VSS=3 ± 10%V,Unless otherwise specified)

CC

OSC On, TxOUT is floating. -- 0.5 1 mA

OP

I1 ~ I8 = “L” OSC Stops.

SB

TxOUT is floating.
VOL=2.2V, VDD=3V 8 15 --

SINK

VOL=1.5V, VDD=3V 4 6 --

IH

IL

L

H

OSC

-- 2.2 3 5 V

-- 0.7V

-- 0 -- 0.3V

-- 30 50 80

-- 40 90 150

-- -- 455 -- kHz

0~6.0 V

Vss-0.2V ~ VCC+0.3V V

500 mW

0.5 1 3

CC

SC2268

°C
°C

µA

mA

-- V

CC

CC

V

kΩ
kΩ

PIN DESCRIPTION

Pin No. Symbol I/O Function

Key input pins.

1~8 I1 ~ I8 I

9 Vss -- Negative power supply.

11~12 C4~C5 I

10 C6 I

13 TxOUT O

15 OSCI I Oscillator Input Pin
14 OSCO O Oscillator Outpu Pin
16 Vcc -- Positive powersupply.

These pins are used to connect a maximum of 8 keys.
(each pin has a built-in pull-lowresistor).

Select input pin for start word.
These pins have internal pull-low resistor.
Select input pin for start word.
This pins have internal pull-high resistor.
Transmission output pin.
This pin is an open drain (NMOS) output and is used to transmit
signals. The carrier frequency is 38kHz.

These pins are used to externally
connect a 455kHz ceramic resonator.

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

2

Rev: 1.0 2000.12.31

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