DS600-10 March ‘06

©2004 Reg. No. 227 4001, ENGLAND

Page 3

RF / IR Encoder / Decoder Chipset

RF Evaluation Boards,

RF600E

RF600D

Pin Descriptions

Name

Pin

Number

Description

S0

1

Switch input 0

S1

2

Switch input 1

S2

3

Switch input 2

S3

4

Switch input 3

Vss

5

Ground reference connection

OP

6

Data output

LED

7

Cathode connection for directly

driving LED during transmission

Vcc

8

Positive supply voltage connection

S0-3

These are the switch inputs which when operated wake up the RF600E and cause transmission. They may

be switched directly to Vcc. Transmission occurs for the duration of the switch operation.

Vcc / Vss

The power supply needs to be a stable regulated voltage with <10mV ripple. Note that in idle mode the

transmitter current drain is typically only 100nA.

OP

Data Output, this is a standard CMOS / TTL output that may be connected directly to the data input pin of

the RF Module. In the event that this represents a load to Vcc then a buffer stage between the data output

and the RF module will be required.

LED

A direct LED drive with internal current limit of typically 1 mA operates when the RF600E is transmitting.

Typical Application Circuit Diagram for FM radio modules

Not that a circuit constructed using AM radio modules does not need to have transistor BC848, resistor

10K or 2k2 Pull up resistor fitted.

8

7

6

5

RF600E

LED

DO

GND

Vcc

2

3

4

1

S1

S2

S3

S0

Sw 1

Serial Data

Output

Vcc

Sw 2

Sw 3

Sw 4

Transmit

LED

2K2

10K

Pull Up Resistor

BC848

RF Transmitte r