Wireless Modem Data Pump
FX909A
Package
D2/D5/P4
Pin No.
20
21
Signal
Description
Name
TXOP
V
BIAS
Type
O/P
O/P
The Tx signal output from the modem.
A bias line for the internal circuitry, held at
�½ V
DD
. This pin must be decoupled to V
SS
by a
capacitor mounted close to the device pins.
The input to the Rx input amplifier.
The output of the Rx input amplifier and the input
to the Rx filter.
The positive supply rail. Levels and voltages are
dependent upon this supply. This pin should be
decoupled to V
SS
by a capacitor.
22
23
RXIN
RXFB
I/P
O/P
24
V
DD
Power
Notes:
I/P =
O/P =
BI
=
Input
Output
Bidirectional
©
1996 Consumer Microcircuits Limited
5
D/909A/4