cxa1700aq Sony Electronics, cxa1700aq Datasheet - Page 9

• Manufacturer Part Number: cxa1700aq
• Description: Luminance And Color Signal Processing For 8mm Vcr
• Manufacturer: Sony Electronics

No.
Pin
26
27
28
29
DDS/MASK
WDC
V IN2
AGC TC1
Symbol
2.0V
(when open)
(MASK)
1.5V
(DDS)
2.3 to 3.0V
2.6V
(when open)
2.05V
(sync tip
level)
DC
—
Pin voltage
Video
500mVp-p
input
AC
—
—
—
28
26
27
29
—9—
Equivalent circuit
150
150
100nA
270
47k
100
MUTE ON
PB ON
1k
45k
30k
10k
2.05V
4µA
16k
15k
MUTE
ON
2.0V
1.1V
4.1V
Input for VOW (character
level) signal, VOB (character
background) timing pulse of
DDS (date display system)
and masking timing pulse.
By varying the input DC for
DDS over a range of 2.3V to
3.0V, the character level can
be changed.
(Refer to item 4 on Description
of Operation.)
Determines the white/dark
clipping levels. When open,
the standard white clipping
level is 235%, and the dark
clipping level is 95%.
(Mode DC1, 2 = Low, High)
(Refer to item 5 on Description
of Operation.)
Video signal input. Performs
diode clamping, with the
clamp capacitance externally
connected. If the mode MUTE
is set High, the charge of the
clamp capacitance is
discharged.
Time constant for the video
AGC circuit in the I/O block.
During mute and playback, the
charge of the external
capacitance is discharged.
MASK : V
DDS :
Description
V
TH
TH
= 1.1V
= 2.0V
CXA1700AQ/AR