E-TDA7421N 查看數據表（PDF） - STMicroelectronics

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产品描述 (功能)

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E-TDA7421N

AM/FM tuner for car radio and Hi-Fi applications

STMicroelectronics 

TDA7421N

Pin description

Table 2.

Pin #

Pin description (continued)

Pin name

Function

46

FM LIM IN + FM limiter negative input (differential +)

47

IF1 VCC

IF1 positive supply

48 FM IF AMP2 OUT FM 2nd IF amplifier output

49

FM IF AMP2 IN - FM 2nd IF amplifier negative input (differential -)

50

FM IF AMP2 IN + FM 2nd IF amplifier positive input (differential +)

51 FM IF AMP1 OUT FM 1st IF amplifier output

52

FM IF AMP IN - FM 1st IF amplifier negative input (differential -)

53

FM IF AMP IN + FM 1st IF amplifier positive input (differential +)

54 AM S-METER TC AM S-meter time constant

55

AM MIX2 OUT AM 2nd mixer output

56

RF VCC

RF positive supply

57

AM MIX2 IN - AM 2nd mixer negative input (differential -)

58

AM MIX2 IN + AM 2nd mixer positive input (differential +)

59

FM IF AGC IN FM IF AGC input

60

MIX OUT - FM/AM 1st mixer negative output (differential -)

61

MIX OUT + FM/AM 1st mixer positive output (differential +)

62

AM AGC1 TC AM 1st AGC time constant

63

AM AGC1 RF

AMP

AM 1st AGC voltage output (to RF amplifier)

64

AM AGC1 PIN AM 1st AGC current output (to antenna attenuation diodes)

1. Pin function is user defined by software.

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