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CXA1812

S-terminal Compatible Video I/O

Sony Semiconductor 

Pin

Pin

Symbol

No.

voltage

1.8 V

19 EVFY/VOUT (Sync tip)

20 VOW1

0V

21 EVFCOUT 2.2 V

22

VOB1

0V

CXA1812Q

∗Externally applied voltage

Equivalent circuit

VCC

180µ

16k

2.1V

360µ 800µ

19

GND

Description

Y and composite video signal output for

the viewfinder. A composite video

signal is output when Pin 28 (Y/VSEL)

is high.

1.8V

1Vp-p

Same as for Pin 4.

VCC

100µ

21

20k

Control input for white level insertion of

the Y and composite video signals for

the viewfinder (output from Pin 19).

The chroma signal for the viewfinder

output from Pin 21 (EVFCOUT) is also

muted simultaneously. This pin takes

precedence over the Pin 22 (VOB1)

control signal.

Low (0 to 0.8 V) : normal operation

High (2 V to VCC) : insertion mode

Chroma signal output for the

viewfinder. When Pin 28 is high, the

output amplifier goes into power saving

mode and Pin 21 goes to high

impedance.

2.2V

GND

200µ 300µ

286mVp-p

628mVp-p

Same as for Pin 6.

Control input for black level insertion of

the Y and composite video signals for

the viewfinder. The chroma signal for

the viewfinder is also muted.

Low (0 to 0.8 V) : normal operation

High (2 V to VCC) : insertion mode

—6—

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