CX74001
Rx ASIC
Pin #
Name
40
PCSMIX_BYPASS
Table 1. CX74001 Pin Assignments and Signal Descriptions (2 of 2)
Description
Low frequency bypass for the PCS mixer. Typically, a 47 nF is connected from pin to ground.
Equivalent Circuit
41
PCS_MIX_IN
PCS mixer input. Requires AC coupling capacitor
42
CELL_MIX_IN
Cellular mixer input
43
RF_BIAS_RES
This sets the RF bias current. Typically, a 15 kΩ resistor is connected from the pin to ground.
44
CELL_LNA_BIAS_RES This sets the cellular LNA bias current. Typically, 27 kΩ is connected to ground.
45
PCS_LNA_OUT
PCS LNA open collector output. VCC inductor pull up and external matching network are
required.
46
NC
47
CELL_LNA_OUT
No Connection.
Cellular LNA open collector output. VCC inductor pull up and external matching network are
required.
48
PCS_LNA_BIAS_RES This set the PCS LNA bias current. Typically, a 220 Ω resistor is connected from the pin to
ground.
6
Conexant - Preliminary
101134A
Proprietary Information
October 20, 2000