Radiometrix Ltd, BiM Data Sheet

page 4

pin 15

TX select

Active low transmit / receive selects with 10kΩ internal

pin 16

RX select

pull-ups. They may be driven by open collector or CMOS logic

All states are valid.

Pin 15 TX

Pin 16 RX

function

1

1

power down (<1µA)

1

0

receiver enabled

0

1

transmitter enabled

0

0

self test loop back

Note - loop test is at reduced TX power.

pin 17

Vcc

positive supply, supply voltages from 4.5V to 5.5V may be used. Reverse

polarity will destroy the module. Supply is internally decoupled.

Maximum ripple content 50mV pk to pk.

Warning:

Don't be tempted to adjust the trimmer on the module, it controls

the receive frequency and can only be correctly set-up with an

accurate RF signal generator.

figure 3: test circuit BiM-UHF