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PDF BA7207AS Data sheet ( Hoja de datos )

Número de pieza BA7207AS
Descripción SECAM chroma signal processor for VHS VCRs
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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No Preview Available ! BA7207AS Hoja de datos, Descripción, Manual

Video ICs
SECAM chroma signal processor for
VHS VCRs
BA7207AS / BA7207AK
The BA7207AS and BA7207AK are LSI components that incorporate the contain circuitry required for SECAM chro-
ma signal processing. The ICs have both recording and playback systems and each includes a bell filter, a band-
pass filter, a limiter amplifier, a multiply-by-four circuit, a divide-by-four circuit, and a sync-gate circuit.
Applications
SECAM and VHS format video cassette recorders and
camcorders
Features
1) All filters required for SECAM chroma signal pro-
cessing are provided.
2) Built-in chroma killer circuit.
3) Built-in switch circuit for selecting PAL chroma or
SECAM chroma for the PB / REC system output.
Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Power supply voltage
Power dissipation
BA7207AS
BA7207AK
VCC
Pd
7
1400 (SDIP32)1
850 (QFP44)2
V
mW
Operating temperature BA7207AS
BA7207AK
Topr
– 25 ~ + 75
– 25 ~ + 65
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
1 Reduced by 14mW for each increase in Ta of 1°C over 25°C .
2 When mounted on a 70mm × 70mm, t = 1.6mm glass epoxy board, reduced by 8.5W for each
increase in Ta of 1°C over 25°C.
Recommended operating conditions (Ta = 25°C)
Parameter
Symbol Min. Typ.
Operating power supply voltage VCC
4.5 5.0
Max.
5.5
Unit
V
1

1 page




BA7207AS pdf
Video ICs
BA7207AS / BA7207AK
10pin
(9pin)
VCC
VCO
5k
12k
GND
13pin
(12pin)
11pin
(10pin)
VCC
PBOUT
GND
14pin
(13pin)
VCC
2.2k
GND
SGC
VCC
10k
10k
GND
PALPIN
VCC
20k
30k
GND
16pin
SYNCIN
17pin
(18pin)
VCC
15k
35k
GND
BWL
VCC
50k
GND
19pin
(21pin)
RECH
VCC
50k
GND
20pin
(22pin)
VCC
CREF3
GND
12pin
(11pin)
SGADJ
VCC
VCC
50k
100k
GND
50k
GND
15pin
(14pin)
VCC
VCC
DIV
GND
18pin
(20pin)
PBIN
VCC
20k
20k
GND
21pin
(23pin)
CTL
VCC
50k
GND
5

5 Page





BA7207AS arduino
Video ICs
BA7207AS / BA7207AK
BA7207AK (QFP44)
1N 2
SW30b
REC OUT
1N 2
SW21
VCC
0.1µ
0.01µ
0.1µ
0.1µ
I23
A
+
47µ
VCC
OSC30
~
12
SW30a
0.01µ
27p
47µ
34
35
VREG
0.1µ
VCC
36
37
38
39
0.01µ
~OSC1
40
41
33 32 31 30 29 28 27 26 25
VCC
LIM
PAL SCM
VREG
×2
P
2.2MHz
BPF
× 2 LIM
PR
4.3MHz
BPF—A
R
R
BELL
P
4.3MHz
BPF—B
PR
EQ
PB
SYNC GATE
1.1MHz
BPF
÷4
REC
SYNC GATE
R
FREQUENCY
ADJUSTER
P
DET
VCO
24 23
MODE
CONTROL
P
R
SYNC GATE
TIMING
GENERATOR
42
SW2
12
43
SCM PAL
3.9k
VCC
44
SW3 SW4
1 21 2
2k 2k
VR1 VR2
8.5k 8.5k
7.5k 7.5k
PB SG OUT
12
470
470
3 4 5 67
0.01µ
12µ
560p
SW8
10k
1 23
+
~OSC8 0.47µ
89
100k
10 11
33k
4700p
1N 2
1N 2
SW19
SW4b
1.5V
2.5V
0.1µ
22
21
20 0.01µ
19 SW18
12
18 ~
OSC18
17
16
15 100p
14
SW16
12
SG16
13
0.01µ
12
1
SW14a SW15
2 12
~
OSC14
3.3k
VCC
AMP OUT
PB OUT
SGC
REC SG OUT
Fig. 2
11

11 Page







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