PPM OUTPUT

PPM TIME CONSTANT

CARRIER TIME CONSTANT

5

6

7

8

9

10

11

12

13

14

15

1

ROW

ENCODER

COLUMN

ENCODER

































SWITCH

MATRIX

CURRENT

SOURCES

SWITCH

MATRIX

CURRENT

SINKS

CODE

REGISTER

MULTIPLEX

3-BIT

COUNTER

SUPPLY

SWITCH

AND

REGULATOR

PULSE

POSITION

MODULATOR

CARRIER

OSCILLATOR

OUTPUT

AMPLIFIER

SWITCH

CURRENT

SELECTOR

4

17

2

3

16

18











Fig. 2 SL486 block diagram

0V AND XXX00

000XX

001XX

010XX

011XX

100XX

CARRIER TIME CONSTANT

PPM TIME CONSTANT

XXX01

XXX10

XXX11

111XX

110XX

101XX

1

2

3

4

5

6

7

8

9

18

17

16

15

14

13

12

11

10

SL490B



























SELECTION

MATRIX

CURRENT

SOURCES

SELECTION

MATRIX

CURRENT

SINKS

SELECTION

MATRIX

CURRENT

SOURCES







OUTPUT

DP18

Fig. 1 Pin connections - top view

QUICK REFERENCE DATA

µA, Operating 8mA

32 Commands

to 200kHz

SL490B

REMOTE CONTROL TRANSMITTER

0V

ABSOLUTE MAXIMUM RATINGS

Total power dissipation

Operating temperature range

Storage temperature range

19·5V

600mW

210

°C to 160°C

255

°C to1150°C

ORDERING INFORMATION

SL490B NA DP

3056-1.3

APRIL 1995

GPS has developed and produced a range of monolithic

integrated circuits which give a wide variety of remote control

facilities. As well as ultrasonic or infra-red transmission,

cable, radio or telephone links may also be used. Pulse

Position Modulation (PPM) is used with or without carrier and

automatic error detection is incorporated. Initially designed

with TV remote control in mind, the device is also suitable for

use in radios, tuners, tape and record decks, lamps and

lighting, toys and models, industrial control and monitoring.

The SL490B is an easily extendable, 32-command PPM

transmitter drawing negligible standby current.

FEATURES

from Noise and Multipath Reflections

Ω Tolerated

(Supersedes version in April 1994 Consumer IC Handbook, HB3120 - 2.0)