參數資料
型號: TB1254N
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PDIP56
封裝: 0.600 INCH, PLASTIC, SDIP-56
文件頁數: 23/58頁
文件大?。?/td> 526K
代理商: TB1254N
Ver3.7
00/01/28 3
TERMINAL INTERFACE
PIN NAME
FUNCTION
INTERFACE
1
IF VCC
A Vcc terminal for the IF circuit.
Supply 5V.
2
RIPPLE
FILTER
A terminal to be leaded to an internal bias
filter. Put a capacitor.
2
5
1
330
27.5k
45k
2k
1k
3
SIF OUT
An output terminal for a 1st SIF signal, that
beaten down by a regenerated carrier.
The SIF frequencies are able to convert into
only 6.5MHz, in order to eliminate SIF BPFs
to single 6.5MHz.
3
5
14
100
500
15k
9V
16.3k
16k
4
AUDIO OUT
An output terminal for audio signal.
FM Det.signal or the external audio signal,
input to pin53, is output (Switched by bus).
An internal audio attenator controles the
output levelS.
4
5
14
50k
5.3V
ATT
9V
30k
100
5
IF GND
The GND terminal for IF circuit.
6
7
IF IN
Input terminals for IF signals. Pin 6 and 7 are
the both input poles of a differential amplifier.
The norminal input level is 90dB(V)(Pin6-7),
input impedance is 1.5 k ohms.
6
5
1
7
100k
1.44k
1.5V
2.75V
8NC
-
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