BA7207AK View Datasheet(PDF) - ROHM Semiconductor

Part Name

Description

MFG CO.

BA7207AK

SECAM chroma signal processor for VHS VCRs

ROHM Semiconductor 

Video ICs

•Measurement circuits

BA7207AS (SDIP32)

BA7207AS / BA7207AK

1N 2

SW30b

OSC30

1

2

SW30a

1 N2

1N2

SW21

SW19

OSC18

1

2

SW18

VREG

0.01µ

RECOUT

Vcc

Vcc

0.1µ

32 31 30

Vreg

27p

47µ

29 28

0.1µ

0.1µ 0.1µ

0.01µ

27

26 25 24

I23

47µ

A

Vcc

+

0.1µ

23 22 21

20

PAL SCM

LIM

CTL

MODE

CONTOROL

0.01µ

19 18

RECH

17

BWL

×2

2.2MHz

BPF

×2

R

P

LIM

EQ

P

1.1MHz

BPF

R

P

4.3MHz

BPF - A

R

P

BELL

R

R

R

P

4.3MHz

BPF - B

PB

SYNC GATE

÷4

REC

SYNC GATE

DET

VCO

SYNC GATE TIMING

GENERATOR

SCM PAL

FREQUENCY

ADJUSTER

1

2

3

4

5

6

7

8

9

10 11

12

13 14

15 16

0.01µ 1

SW2

2

SW3 SW4

12 12

OSC1

3.9k

V

2k

2k

VR1

VR2

8.5k

8.5k

7.5k

7.5k

AMPOUT

Vcc

470

1

470 12µ

560p

100k

0.01µ 10k

4700p

0.47µ +

33k PBOUT

SW8

23

OSC8

1

SGC 0.01

µ

SW15

2 100P

3.3k

1

V

SW14a

12

Vcc

OSC14

SW16

2

SG16

SW14b

1 N2

1.5V

Fig. 1

2.5V

10

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