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Pin Descriptions RF803D

See Page 8 for application circuit example

SOIC / PDIP

Pin

Number

Name

Input /

Output

Description

7

OP1

Out

Digital Output 1

6

OP2

Out

Digital Output 2

5

OP3

Out

Digital Output 3

1

Vcc

In

Supply Voltage

8

Vss

In

Supply GND

2

SD/ML

In/Out

Serial Data Output / Momentary / Latching setting

3

LRN

In/Out

Learn / Erase Function

4

Rx

In

Rx Data input

Vcc

2.5-5.5V DC input. The power supply needs to be a stable regulated voltage with <10mV ripple

GND

Ground connection.

OP1-3

These outputs are asserted LOW when the relevant inputs (S1 – S3) on the RF803E are asserted.

(see latch/unlatch information under ‘LKIN’).

RX DATA

This is the data input to the decoder it may be connected directly to the RF receiver module.

LRN

This input is used to set the decoder module to ‘Learn Mode’ and for the ‘Erase Function’ and is

also used to drive the Status LED.

SERIAL / OP TIMING

Multi-functional pin

This pin is read on power up to sets the action of outputs 1-3, Momentary action is set by a

connection to ground through a 2K2 ohm resistor, latching is set using open circuit.

In normal run mode this pin outputs serial data on reception of a valid data string.