ZXFV4583
SYNC SEPARATOR WITH VARIABLE FILTER
DEVICE DESCRIPTION
The ZXFV4583 provides the ability to separate out
video synchronization signals for a wide variety of TV
and CRT display systems, standard and non-standard.
Flexibility arises from the use of just three external
resistors to adapt to each application. One resistor
controls a fully integrated internal color carrier filter
with variable bandwidth. This filter avoids disturbance
from the color carrier, permitting accurate threshold
slicing for timing extraction.
A second resistor controls the voltage threshold for
loss of signal detection after a time-out interval. The
third resistor controls the timing functions.
DC restoration for displays is facilitated by the Back
Porch synch output, which can be used to drive an
external circuit to clamp the blanking voltage to a fixed
level.
FEATURES AND BENEFITS
•
PAL, NTSC, SECAM
•
Variable filter for optimal accuracy
•
Sync outputs: composite, horizontal, vertical, back
porch, odd/even
•
No-signal detector
•
On chip sample / hold capacitors
•
+5V single supply
•
Default vertical output where there are no
serration pulses
•
Pin and layout compatible with part EL4583 in
SO16N surface mount package
APPLICATIONS
•
Digital image capture
•
Video input systems requiring separation of
picture timing
ORDERING INFORMATION
Part Number
ZXFV4583N16TA
ZXFV4583N16TC
Container
Reel 7″
Reel 13″
Increment
500
2500
•
Video distribution
•
CCTV surveillance
•
Digital multimedia
•
Timing for black level clamp
CONNECTION DIAGRAM
ISSUE 3 - NOVEMBER 2003
1
SEMICONDUCTORS
ZETEX [ ZETEX SEMICONDUCTORS ]
