STB4395 datasheet(5/16 Pages) STMICROELECTRONICS

5 / 16 page

1 - PIN DESCRIPTION (continued)

1.2 - Pin List (continued)

Name

Description

Ext. Connection and Suppl. Information

NSAWO

RX First IF Amplifier Input

SAWO

RX First IF Amplifier Input

VNIF

Negative Battery Supply Input for RX sections

VNRF

Negative Battery Supply Input for RF front end

SAWI

RX First Mixer Output

NSAWI

RX First Mixer Output

VRRF

Regulated Negative Supply for RF front end

VNPA

Negative Supply for power amplifier

VPRF1

Positive Battery Supply for RF front end

NRF

Input LNA/Output PA

Input LNA/Ouput PA

VPRF2

Positive Battery Supply for RF front end

ADJPWR

Transmit Power Adjust

R = 8.5k

Ω to VRRF

SHAPE

Time Constant for PA on-off ramp

C = 560pF

TXFLT

Bandpass Filter for TX RF

NTXFLT

Bandpass Filter for TX RF

VPD

Positive Battery Supply for digital circuitry

VRD

Regulated Negative Supply for digital circuitry

VND

Negative Battery Supply for digital circuitry

1.3 - Analog and Filter Pins

Symbol

Description

ADJPWR

Transmitter Output Power Adjust

BRF1

Bit Rate Filter1

BRF2

Bit Rate Filter 2

BRF3

Bit Rate Filter 3

42, 39

DEC, NDEC

RX IF2 Amplifier Decoupling

DISCI

FM Discriminator Tank Circuit

DISCO

FM Discriminator Tank Circuit

FLTRI

Loop Filter for RX PLL

FLTRO

Loop Filter for TX PLL

FLTRS

Loop Filter for Channel PLL

6, 7

I, NI(1)

Transmit Quadrature Inputs ((1)STB4395 only)

40, 41

IF2I, NIF2I

Inputs from 2nd IF Filter

43, 44

IF2O, NIF2O

Outputs to 2nd IF Filter

8, 9

Q, NQ(1)

Q-Transmit Quadrature Input ((1)STB4395 only)

REFIQ

IQ Reference Quadrature Transmit Input (STB4395A only)

56, 55

RF, NRF

Input RX LNA/Ouput TX PA

RSSI

Received Signal Strength Indicator Output

50, 51

SAWI, NSAWI

First Mixer Output

47, 46

SAWO, NSAWO

First IF Amplifier Input

SHAPE

Time Constant for PA on-off Ramp

SLTC

Slicer Time Constant Capacitor

SYNCLK

Synthesizer Clock Input 14.4MHz

60, 61

TXFLT/ NTXFLT

Bandpass Filter for TX RF

35, 34

VCOI, NVCOI

Tank Circuit for 152.1MHz RX Oscillator

14, 15

VCOO, NVCOO

Tank Circuit for 300.8MHz TX Oscillator

25, 24

VCOS, NVCOS

Tank Circuit for 650 to 850MHz Channel Oscillator

STB4395

5/16

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