CX74001(2000) Ver la hoja de datos (PDF) - Conexant Systems

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CX74001
(Rev.:2000)

Rx ASIC for CDMA, AMPS, and PCS Applications

Conexant Systems 

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

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