Block diagram

TSH511

4/25

10

AMP-IN1

RX1

I

Intermediate amplifier input

11

DEC-LNA

RX1 & RX2

-

Decoupling capacitor

12

AMP-OUT1

RX1

O

Intermediate amplifier input

13

GND

-

-

GROUND

14

LIM-IN1

RX1

I

Limiter input

15

DEC-LIM1A

RX1

-

Decoupling capacitor

16

LIM-OUT1

RX1

O

Limiter output

17

DEC-LIM1B

RX1

-

Decoupling capacitor

18

MIX-IN1

RX1

I

Mixer input

19

VCC

-

-

SUPPLY VOLTAGE

20

MIX-OUT1

RX1

O

Mixer output (demodulated audio signal)

21

GND

-

-

GROUND

22

BUF-IN1

RX1

I

Audio buffer input

23

MUTE-IN

RX1 & RX2

I

Noise amplifier input (Squelch circuit)

24

MUTE-INT

RX1 & RX2

-

Capacitor connection of the noise rectifier

25

MUTE-OUT

RX1 & RX2

O

Capacitor connection (ramp generator to mute the audio)

26

BUF-OUT1

RX1

O

Audio buffer output

27

GND

-

-

GROUND

28

DEC-OUT

RX1 & RX2

-

Decoupling capacitor of Audio buffers

29

VCC

-

-

SUPPLY VOLTAGE

30

BUF-OUT2

RX2

O

Audio buffer output

31

SBY2

RX1 & RX2

I

Standby 2

32

SBY1

RX1 & RX2

I

Standby 1

33

GND

-

-

GROUND

34

BUF-IN2

RX2

I

Audio buffer input

35

GND

-

-

GROUND

36

MIX-OUT2

RX2

O

Mixer output

37

VCC

-

-

SUPPLY VOLTAGE

38

MIX-IN2

RX2

I

Mixer input

39

DEC-LIM2A

RX2

-

Decoupling capacitor

40

LIM-OUT2

RX2

O

Limiter output

41

DEC-LIM2B

RX2

-

Decoupling capacitor

42

LIM-IN2

RX2

I

Limiter input

43

GND

-

-

GROUND

44

AMP-OUT2

RX2

O

Intermediate amplifier output

1.

Pin direction: I = input pin, O = output pin, - = pin to connect to supply or decoupling capacitors or external components.

Table 1.

Pin descriptions

Pin

Pin name

Related to

Pin description