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CXA1812

S-terminal Compatible Video I/O

Sony Semiconductor 

CXA1812Q

∗Externally applied voltage

Pin

Pin

Symbol

No.

voltage

Equivalent circuit

Description

Video output chroma signal input.

Coupled by means of a capacitor within

VCC

the IC.

Inputting a signal of –0.3 V or less may

7

CIN

—

7

150 20p

lead waveform distortion.

2.2V

80µ

GND

143mVp-p

314mVp-p

8 COUTVCC 4.75 V∗

—

Chroma 75 Ω driver power supply.

9 YOUTVCC 4.75 V∗

—

Y 75 Ω driver power supply.

10

SEL1

0V

Same as for Pin 6.

Control input used for switching the

signals that are input from Pins 11

(EVFYIN) and 13 (YIN).

Low (0 to 0.8 V) :

signal at Pin 13 is selected

High (2 V to VCC) :

signal at Pin 11 is selected

2.5 V

11

EVFYIN (Sync tip) 11

Y signal input for viewfinder.

VCC Coupled by means of a capacitor ; in

order to keep clamp error to a

minimum, keep the input impedance as

low as possible.

1100

1µ

50µ

GND

2.5V

0.5Vp-p

20µ

12 P. SAVE

0V

12

150

VCC Control input for power saver. When in

power saving mode, the Y and C 75 Ω

drivers stop operating. The output of

Pin 31 (YOUT) and Pin 5 (COUT) goes

to high impedance.

Low (0 to 0.8 V) : normal operation

GND High (2 V to VCC) : power saving mode

—4—

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