2-464

RF3133

Rev A4 030527

Pin

Function

Description

Interface Schematic

1

2

BAND

SELECT

Allows external control to select the GSM or DCS band with a logic high

or low. A logic low enables the GSM band whereas a logic high enables

the DCS band.

3

TX Enable is asserted the RF output level will increase to -2dBm.

4VBATT

Power supply for the module. This should be connected to the battery.

5VREG

Regulated voltage input for power control function. (2.8V nom)

6

VRAMP

Ramping signal from DAC. A simple RC filter may need to be con-

nected between the DAC output and the VRAMP input depending on

the baseband selected.

7

GSM IN

RF input to the GSM band. This is a 50

Ω input.

8VCC2

Controlled voltage input to driver stage for GSM bands. This voltage is

part of the power control function for the module. This node must be

9GSM OUT

RF output for the GSM band. This is a 50

Ω output. The output load line

matching is contained internal to the package.

10

VCC OUT

power control function for the module. It can not be connected to any-

(i.e., decoupling capacitor).

11

DCS/PCS

OUT

RF output for the DCS band. This is a 50

Ω output. The output load line

matching is contained internal to the package.

12

VCC2

Controlled voltage input to DCS driver stage. This voltage is part of the

power control function for the module. This node must be connected to

Pkg

Base

GND