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参数资料
| 型号： | TDA7421N |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| 封装： | TQFP-64 |
| 文件页数： | 47/47页 |
| 文件大小： | 374K |
| 代理商： | TDA7421N |
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TDA7421N
Pin description
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.
Table 2.
Pin description (continued)
Pin #
Pin name
Function
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