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LA7437 Datasheet(PDF) 5 Page - Sanyo Semicon Device

Part No. LA7437
Description  Video Signal Processing IC for VHS VCR Systems
Download  8 Pages
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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LA7437 Datasheet(HTML) 5 Page - Sanyo Semicon Device

   
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No. 5473-5/8
LA7437, 7437A
LA7437A Control Pin Table
Note: Do not allow pin 3 to fall under 1.5 V. (The chip will enter test mode.)
Function Control in each of the LA7437A Operating Modes
Note: 1. K1 is the YNR coefficient, K2 is the LNC coefficient
2. Use the 1/2 fH carrier shift entries in parentheses when pin 23 is high.
3. The detail enhancer is off when pin 18 is at the middle level.
Pin No.
Control function
L
M
H
9
R/P
Edit
3.8 VDC or more
40
R/P
YNR (AVNS)-CTL
1.0 VDC to less
1.5 to 2.5 VDC
3.5 VDC or more
YNR-off
YNR-CTL
YNR (strong)
R
******
3.9 VDC or more
11
P
N, C, CTL
1.5 VDC or less
2.0 to 3.0 VDC
N, C-off
N, C-CTL
17
R/P
C-rotary
0 to 1.9 VDC
2.3 VDC or more
Low CH
High CH
19
P
QV/QH CHARA. INS
0.8 VDC or less
1.2 to 2.2 VDC
2.6 to 3.3 VDC
3.7 VDC or more
Through
CHARA insert
Pedestal insert
QV insert
25
R/P
EP/LP/SP
1.2 VDC or less
2.0 to 2.7 VDC
3.9 VDC or more
SP
LP
EP
28
R
SP carrier shift stop
3.0 VDC or more
SP carrier shift stop
27
P
NAP
1.2 VDC or less
2.0 to 2.7 VDC
3.3 VDC or more
Through
Balanced-mod output
NAP-on
30
R/P
NT/MESEC/PAL
1.2 VDC or less
2.0 to 2.7 VDC
3.9 VDC or more
PAL
MESEC
NTSC
33
P
Trick
3.9 VDC or more
2
P
DOC-off
4.1 VDC or more
6
R/P
PB-H
4.0 VDC or more
YNR
Detail enhancer
NC
1/2 fH
Edit
Pin 40 control
Pin 11 control
Pin 11 control
PIC-CTL
carrier
shift
L
M
H
L
M
H
L
M
H
On
Off
Off
Off
Off
Variable
Center
q
q
SP
(!)
Off
Off
Off
Off
Off
Variable
Center
q
q
REC
(!)
On
Off
K1 = 0.2 K1 = 0.2
Off
Variable
Center
q
q
LP
K2 = 0.0 K2 = 0.0
EP
Off
Off
K1 = 0.5 K1 = 0.5
Off
Variable
Center
q
q
K2 = 0.0 K2 = 0.0
On
K1 = 0.0 K1 = 0.0 K1 = 0.5
Off
Variable
Center
Center
SP
K2 = 0.0 K2 = 0.0 K2 = 0.0
Off
K1 = 0.0 K1 = 0.2 K1 = 0.5
Off
Variable
Center
q
q
PB
K2 = 0.0 K2 = 0.0 K2 = 0.0
On
K1 = 0.0 K1 = 0.2 K1 = 0.5
Off
Variable
Center
Center
LP
K2 = 0.5 K2 = 0.5 K2 = 0.5
EP
Off
K1 = 0.0 K1 = 0.2 K1 = 0.5
Off
Variable
Center
q
q
K2 = 0.5 K2 = 0.5 K2 = 0.5


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