PIN DESCRIPTION

Pin

Name

Pin

Number

Pin

Type

Description

1

Analog

Common Mode Voltage

2

Supply

Analog Power Supply : 10V

±5 %

RAI

3

Analog

Receive Analog Input

RxFO

4

Analog

Receive Filter Output

TxIFI

5

Analog

Transmit and Intermediate Frequency Filters Test Input (mode TEST3)

PAFB

6

Analog

Power Amplifier Feed-back Input

ATO

7

Analog

Analog Transmit Output

PABC

8

Digital (10V)

Power Amplifier Bias Current Control Complementary Output

PABC

9

Digital (10V)

Power Amplifier Bias Current Control Output

TEST1

10

Digital

Tx to Rx Automatic Mode Switching Control Input

TEST2

11

Digital

Automatic Mode Switching Time and Watch-dog Time Reduction Control Input

TEST3

12

Digital

TxIFI Selection Input

TEST4

13

Digital

Undelayed Reset Input

14

Supply

Digital Power Supply : 10V

±5%

15

Supply

Digital Ground : 0V

XTAL1

16

Digital (10V)

Crystal Oscillator Input

XTAL2

17

Digital (10V)

Crystal Oscillator Output

MCLK

18

Digital

Master Clock Output

WD

19

Digital

Watch-dog Input

Rx/Tx

20

Digital

Rx or Tx Mode Selection Input

CD

21

Digital

Carrier Detect Output

TxD

22

Digital

Transmit Data Input

RxD

23

Digital

Receive Data Output

RSTO

24

Digital

Reset Output

25

Supply

Digital Buffers Supply Voltage : 5V

±5 %

IFO

26

Analog

Intermediate Frequency Filter Output

DEMI

27

Analog

Demodulator Input

28

Supply

Analog Ground : 0V

ST7537HS1

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