BIM-433-40 Radiometrix, BIM-433-40 Datasheet - Page 3

• Manufacturer Part Number: BIM-433-40
• Description: Low Power UHF Data Transceiver Module
• Manufacturer: Radiometrix

Pin Description
pin 1 & 3
pin 2
pin 9, 10, 18
pin 11
pin 12
pin 13
pin 14
Radiometrix Ltd, BiM Data Sheet
RF GND
Antenna
Vss
CD
RXD
RX Audio
TXD
These pins should be connected to the ground plane against
which the integral antenna radiates . Internally connected to
pins 9,10,18 .
RF input / RF output for connection to an integral antenna. It
has a nominal RF impedance of 50Ω and is capacitively
isolated from the internal circuit.
0V connection for the modulation and supply
Carrier Detect - When the receiver is enabled, a low indicates a
signal above the detection threshold is being received. The
output is high impedance (50kΩ) and should only be used to drive a
CMOS logic input.
This digital output from the internal data slicer is a squared
version of the signal on pin 13 (AF). This signal is used to
drive external digital decoders, it is true data (i.e. as fed to the
transmitters data input). The 10kΩ output impedance is
suitable for driving CMOS logic.
Note:
being received.
This is the FM demodulator output. It has a standing DC
bias of approximately 1.5V and may be used to drive
analogue data decoders such as modems or DTMF decoders.
Output impedance is 10kΩ. Signal level approx. 0.4V pk to
pk. We recommend this signal always be available on a
convenient test point for diagnostic purposes.
Note:
output is true data on the BiM-418 and inverted on
the BiM-433.
Should be driven directly by a CMOS logic device running on
the same supply voltage as the module. Analogue drive may
be used but must not drive this input above Vcc or below
0V. This input should be held at <0.5V when the TX is
not selected to prevent current leak (see block diagram).
this output contain squared noise when no signal is
unlike the RXD output which is always true data, this
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