ISM 433 MHz ASK Transmitter – Preliminary Data Sheet

AS3902

Rev. A7, December 2000

Page 9 of 14

3

Pin-out Informatio n

Pin #

Pin Name

Input / Output

Description

1

NRES/PD

Dig. tri-state I/O, pull up during

active cycle

µC reset output/transmitter power down

input

2

TXD

Dig. Input with pull down

Transmit data input

3

XTAL

Analog I/O

XTAL pin

4

CLK/NWUP

Dig. tri-state I/O with pull up

µC clock output/wake-up input (push but-

ton)

5

GND

Power

Ground

6

ANT2

Analog open collector output

To loop antenna

7

ANT1

Analog open collector output

To loop antenna

8

VDD

Power

Positive supply

4

Application Schemati c

/NWUP

/

PD

Figure 5:

Basic application schematic of the AS3902.

AS3902