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參數(shù)資料
| 型號： | CX74076 |
| 英文描述： | CX74076 Receiver for CDMA and GPS|Handset RF ICs:CDMA / CDMA2000 |
| 中文描述： | CX74076接收的CDMA和GPS |手機(jī)射頻集成電路：碼分多址/ CDMA2000的 |
| 文件頁數(shù)： | 6/23頁 |
| 文件大?。?/td> | 664K |
| 代理商： | CX74076 |
CX74001
Rx ASIC for CDMA, AMPS, and PCS Applications
6
Skyworks
101134A
Proprietary Information and Specifications are Subject to Change
March 5, 2002
Table 1. CX74001 Pin Assignments and Signal Descriptions (3 of 4)
Pin #
Name
Description
Equivalent Circuit
31
CDMA_MIX_OUT–
CDMA differential cellular mixer open collector output. VCC pull up inductor is required, and
the output impedance is set by an external matching network.
32
CDMA_MIX_OUT+
CDMA differential cellular mixer open collector output. VCC pull up inductor is required, and
the output impedance is set by an external matching network.
33
AMPS_MIX_OUT–
AMPS differential mixer open collector output. VCC pull up inductor is required, and the output
impedance is set by an external matching network.
34
AMPS_MIX_OUT+
AMPS differential mixer open collector output. VCC pull up inductor is required, and the output
impedance is set by an external matching network.
35
PCS_MIXER_OUT–
PCS differential mixer open collector output. VCC pull up inductor is required, and the output
impedance is set by an external matching network.
36
PCS_MIXER_OUT+
PCS differential mixer open collector output. VCC pull up inductor is required, and the output
impedance is set by an external matching network.
–
+
37
VCC_MIX
Voltage supply for the mixers. RF bypass capacitor should be close to pin with minimal trace
length.
38
PCS_LO
The local oscillator input for the PCS band mixer.
39
CELL_LO
The local oscillator input for the cellular band mixer.
40
PCSMIX_BYPASS
Low frequency bypass for the PCS mixer. Typically, a 47 nF is connected from pin to ground.
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 k
resistor is connected from the pin to ground.
44
CELL_LNA_BIAS_RES
This sets the cellular LNA bias current. Typically, 27 k
is connected to ground.
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