ZXFV401 Datasheet, PDF (1/8 Pages) Zetex Semiconductors – SYNC SEPARATOR WITH VARIABLE FILTER

SYNC SEPARATOR WITH VARIABLE FILTER
ZXFV401
DEVICE DESCRIPTION
The ZXFV401 provides the ability to separate out video
synchronisation 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 colour carrier filter
with variable bandwidth. This filter aviods disturbance
from the colour 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 curcuit to clamp the blanking voltage to a fixed
level.
ORDERING INFORMATION
Part Number
Container Increment
ZXFV401N16TA
Reel 7″
500
ZXFV401N16TC
Reel 13″
2500
FEATURES AND BENEFITS
• PAL, NTSC, SECAM, other TV systems
• Super accurate synch slice
• Variable filter for outputs: composite, horizontal,
Vertical, back porch, odd / even
• No-signal detector
• On chip sample / hold capacitors
• +5V single supply
• 4.5 mA supply current
• Default vertical output where there are no
serration pulses
• Pin compatible with industry standard part SO16N
surface mount package
APPLICATIONS
• Digital image capture
• Video input systems requiring separation of
picture timing
• Video distribution
• CCTV surveillance
• Digital multimedia
• Timing for black level clamp
CONNECTION DIAGRAM
VIDEO INPUT
+5V
ZXFV401N16
RFILT
1 RFILT
RNOSIG
C1
2 RNOSIG
3 CSYNC
4 FILTIN
0.1uF
75R
5 VSYNC
6 0VD
C2
0.1uF
7 FILTOUT
8 FVIDIN
0VA 16
HSYNC 15
V+ 14
ODDFLD 13
RSET 12
BKPCH 11
NOSIG 10
VLEV 9
RSET
COMPOSITE SYNC
HORIZONTAL SYNC
ODD FIELD
BACK PORCH
NO SIGNAL
SYNC TIP VOLTAGE
VERTICAL SYNC
PROVISIONAL ISSUE A - FEBRUARY 2002
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