DS0353-9 March ‘05

©2005 Reg. No. 227 4001, ENGLAND

Page 2

TRXQ1

RXQ1

RXQ1 Pinout Detail

RF Gnd. 1

Antenna 2

RF Gnd. 3

10 Gnd.

11 nc

12 Rx Data

13 nc

14 Tx Data

15 Tx Select

16 Rx Select

17 Vcc

18 Channel Select

Top View

RXQ1

FM Transceiver

nc 4

Gnd. 5

nc 6

nc 7

nc 8

Gnd. 9

30.48

Pin Descriptions

Pin

Number

Name

Type

Description

1,3

RF GND

In

For best results, these pins should be connected to the ground

plane against which the antenna radiates.

2

Antenna

In / Out

Nominal 50 ohm input/output impedance capacitively isolated from

the internal circuit.

4, 6, 7, 8,

11, 13

nc

-

No Connection

5, 9, 10

GND

In

Connect to 0 volts.

12

Rx

Out

Received data output to host controller (CMOS logic out)

representing true data as supplied to the transmitter.

14

Tx

In

Transmit data input from host controller

Data input to the transmitter can be directly interfaced to CMOS

logic drive operating on the same supply voltage as the transceiver

15

Tx SELECT

In

Transmit select. Active LOW.

16

Rx SELECT

In

Receive select. Active LOW.

17

Vcc

In

Positive supply voltage connection. Decouple with 100n ceramic

capacitor to ground.

18

CS

In

Channel Select;

Logic 0 selects 433.92MHz

Logic 1 selects 434.33MHz

Operation Table

Tx Select

RX Select

Function

0

0

Power Down Mode

0

1

Transmit Mode

1

0

Receive Mode

1

1

Power Down Mode