EL1881
®
Data Sheet
September 15, 2011
FN7018.2
Sync Separator, Low Power
Features
The EL1881 video sync separator is manufactured using
Elantec’s high performance analog CMOS process. This
device extracts sync timing information from both standard
and non-standard video input. It provides composite sync,
vertical sync, burst/back porch timing, and odd/even field
detection. Fixed 70mV sync tip slicing provides sync edge
detection when the video input level is between 0.5VP-P and
-2VP-P (sync tip amplitude 143mV to 572mV). A single
external resistor sets all internal timing to adjust for various
video standards. The composite sync output follows video in
sync pulses and a vertical sync pulse is output on the rising
edge of the first vertical serration following the vertical
pre-equalizing string. For non-standard vertical inputs, a
default vertical pulse is output when the vertical signal stays
low for longer than the vertical sync default delay time. The
odd/even output indicates field polarity detected during the
vertical blanking interval. The EL1881 is plug-in compatible
with the industry-standard LM1881 and can be substituted
for that part in 5V applications with lower required supply
current.
• NTSC, PAL, SECAM, non-standard video sync separation
The EL1881 is available in the 8 Ld PDIP and SOIC
packages and is specified for operation over the full -40°C to
+85°C temperature range
• Fixed 70mV slicing of video input levels from 0.5VP-P to
2VP-P
• Low supply current - 1.5mA typ.
• Single +5V supply
• Composite, vertical sync output
• Odd/even field output
• Burst/back porch output
• Available in 8 Ld PDIP and SOIC packages
• Pb-free available (RoHS Compliant)
Applications
• Video amplifiers
• PCMCIA applications
• A/D drivers
• Line drivers
• Portable computers
• High-speed communications
• RGB applications
Pinout
• Broadcast equipment
EL1881
(8 LD PDIP, SOIC)
TOP VIEW
COMPOSITE SYNC OUT 1
8
• Active filtering
Demo Board
VDD 5V
COMPOSITE VIDEO IN 2
7 ODD/EVEN OUTPUT
VERTICAL SYNC OUT 3
6
GND
A dedicated demo board is available.
RSET
5 BUST/BACK
PORCH OUTPUT
4
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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