ATR4258-ILQH 19【PDF 4/38 页】IC RCVR AM/FM 3WIRE BUS 44SSOP

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3. Pin Description

4

Pin

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

Symbol

MX1FMA

MX1FMB

MX1AMB

GNDMX

FMAGC

AMVREG

AMAGC

AMPLPF

METER

ADJAC

MPX

V57

OSCB

OSCE

GNDOSC

OSCOUT

EN

CLK

DATA

IF2OUT

INT

MX2LO

MX2OB

MX2OA

GND

MX2IN

V3P

IF2IN

V3

IF1OUT

DEV

OPLPF

IF1AMI

SMUTE

IFAGCH

IFAGCL

FILADJ

IF1FMI

IF1REF

MULTIP

MX1AMA

VS

MX1OA

MX1OB

ATR4258

Function

1 st mixer FM input A

1 st mixer FM input B

1 st mixer AM input B

Ground 1 st mixer, preamplifier AGC

FM preamplifier AGC

AM control voltage

AM preamplifier AGC

AM AGC LP filter

Field strength output

Adjacent channel detection output

Multiplex signal

5.7V reference voltage

Oscillator basis

Oscillator emitter

Oscillator ground

Oscillator output

3-wire bus enable

3-wire bus clock

3-wire bus data

2 nd IF amplifier output

Interrupt, stop signal

10.25 MHz input for 2 nd mixer

2 nd mixer output B

2 nd mixer output A

Ground

2 nd mixer input

3V reference for AMPIN, AMIFAGC, Control, IF2IN

2 nd IF amplifier input

3V reference for IF1OUT, MX2IN

1 st IF amplifier output

Deviation detect output, test output

Operating point LPF

1 st IF AM amplifier input

Soft MUTE control input

IF AGC LP filter high time

IF AGC LP filter low time constant

Filter adjust

1 st IF FM amplifier input

1 st IF & MX1OUT reference, MX1AM A, MX1AM B

Multipath detection output

1 st mixer AM input A

Supply voltage

1 st mixer output A

1 st mixer output B

4838B–AUDR–05/05

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