®
EL1881
Data Sheet
October 20, 2004
FN7018.1
Sync Separator, Low Power
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 0.5V
P-P
and
-2V
P-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.
The EL1881 is available in the 8-pin PDIP and SO packages
and is specified for operation over the full -40°C to +85°C
temperature range.
Features
• NTSC, PAL, SECAM, non-standard video sync separation
• Fixed 70mV slicing of video input levels from 0.5V
P-P
to
2V
P-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-pin PDIP and SO packages
•
Pb-free available
Applications
• Video amplifiers
• PCMCIA applications
• A/D drivers
• Line drivers
• Portable computers
• High-speed communications
• RGB applications
Ordering Information
PART NUMBER
EL1881CN
EL1881CS
EL1881CS-T7
EL1881CS-T13
EL1881CSZ
(See Note)
EL1881CSZ-T7
(See Note)
EL1881CSZ-T13
(See Note)
PACKAGE
8-Pin PDIP
8-Pin SO
8-Pin SO
8-Pin SO
8-Pin SO
(Pb-free)
8-Pin SO
(Pb-free)
8-Pin SO
(Pb-free)
TAPE & REEL
-
-
7”
13”
-
7”
13”
PKG.
DWG. #
MDP0031
MDP0027
MDP0027
MDP0027
MDP0027
MDP0027
MDP0027
• Broadcast equipment
• Active filtering
Demo Board
A dedicated demo board is available.
Pinout
EL1881
(8-PIN PDIP, SO)
TOP VIEW
COMPOSITE SYNC OUT 1
COMPOSITE VIDEO IN 2
VERTICAL SYNC OUT 3
GND
4
8
V
DD
5V
7 ODD/EVEN OUTPUT
6
R
SET
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020C.
5 BUST/BACK
PORCH OUTPUT
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
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