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參數資料
| 型號： | LA72680M |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封裝： | 14 X 14 MM, QFP-80 |
| 文件頁數： | 5/21頁 |
| 文件大小： | 323K |
| 代理商： | LA72680M |
LA72680M
PS No.7955-13/21
Continued from preceding page.
DC voltage
Pin
No.
Pin Function Name
AC level
Function
Equivalent circuit
55
PHASE
COMPARATOR(BIL.)
This detection pin becomes High(4.0V or
more) because of detecting BIL, when BIL
signal is input.
56
PHASE
COMPARATOR(ST.)
This detection pin becomes High(4.0V or
more) because of detecting ST, when ST
signal is input.
25k
1k
200
57
SIF INPUT
Input terminal for SIF.
The input impedance is about 1k
. Be care
for about pattern layout of the input circuit,
because of causing buzz-beat and buzz by
leaking noise signal into the input
terminal.(The noise signal depending on
sound is particularly video signal and chroma
signal and so on. VIF carrier becomes noise
signal.)
Composite signal of MTS can be input by
adding 5V to this terminal directly.(For test)
500
1k
1k
500
58
FM FILTER
Filter terminal for making stable DC voltage
of FM detection output in SIF part.
Normally, use a condenser of 1F. Increase
the capacity value with concerning frequency
characteristics of low level.
This terminal becomes composite signal
input terminal of MTS by changing to 5V at
Pin57.
1k
1k
59
REG FILT
DC; 4.5V
Filter terminal of reference
voltage source
60k
11
k
49k
1k
to SIF block
to MTS block
60
FILTER AUTO ADJ
DC; 3.8V
Loop filter terminal for
automatic adjusting.
1k
200
40
A
40k
50
A
200
3.8V
Continued on next page.
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