1 - PIN DESCRIPTION (continued)

1.2 - Pin List (continued)

Pin

Name

Description

Ext. Connection and Suppl. Information

46

NSAWO

RX First IF Amplifier Input

47

SAWO

RX First IF Amplifier Input

48

VNIF

Negative Battery Supply Input for RX sections

49

VNRF

Negative Battery Supply Input for RF front end

50

SAWI

RX First Mixer Output

51

NSAWI

RX First Mixer Output

52

VRRF

Regulated Negative Supply for RF front end

53

VNPA

Negative Supply for power amplifier

54

VPRF1

Positive Battery Supply for RF front end

55

NRF

Input LNA/Output PA

56

RF

Input LNA/Ouput PA

57

VPRF2

Positive Battery Supply for RF front end

58

ADJPWR

Transmit Power Adjust

R = 8.5k

59

SHAPE

Time Constant for PA on-off ramp

C = 560pF

60

TXFLT

Bandpass Filter for TX RF

61

NTXFLT

Bandpass Filter for TX RF

62

VPD

Positive Battery Supply for digital circuitry

63

VRD

Regulated Negative Supply for digital circuitry

64

VND

Negative Battery Supply for digital circuitry

1.3 - Analog and Filter Pins

Pin

Symbol

Description

58

ADJPWR

Transmitter Output Power Adjust

28

BRF1

Bit Rate Filter1

31

BRF2

Bit Rate Filter 2

27

BRF3

Bit Rate Filter 3

42, 39

DEC, NDEC

RX IF2 Amplifier Decoupling

29

DISCI

FM Discriminator Tank Circuit

30

DISCO

FM Discriminator Tank Circuit

33

FLTRI

Loop Filter for RX PLL

16

FLTRO

Loop Filter for TX PLL

21

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)

7

REFIQ

IQ Reference Quadrature Transmit Input (STB4395A only)

56, 55

RF, NRF

Input RX LNA/Ouput TX PA

37

RSSI

Received Signal Strength Indicator Output

50, 51

SAWI, NSAWI

First Mixer Output

47, 46

SAWO, NSAWO

First IF Amplifier Input

59

SHAPE

Time Constant for PA on-off Ramp

19

SLTC

Slicer Time Constant Capacitor

12

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

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