Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these

specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.

© 2001 Elantec Semiconductor, Inc.

General Description

The EL1881C 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

tor 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 follow-

ing 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 EL1881C 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 EL1881C 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.

Connection Diagram

1

2

3

4

8

7

6

5

Composite Sync Out

Composite Video In

Vertical Sync Out

GND

VDD 5V

Odd/Even Output

RSET

Burst/Back Porch Output

Features

• NTSC, PAL, SECAM, non-

standard video sync separation

• Fixed 70mV slicing of video input

• 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

Applications

• Video amplifiers

• PCMCIA applications

• A/D drivers

• Line drivers

• Portable computers

• High-speed communications

• RGB applications

• Broadcast equipment

• Active filtering

Demo Board

A dedicated demo board is available.

Ordering Information

Part No.

Package

Tape & Reel

Outline #

EL1881CN

8-Pin PDIP

-

MDP0031

EL1881CS

8-Pin SO

-

MDP0027

EL1881CS-T7

8-Pin SO

7”

MDP0027

EL1881CS-T13

8-Pin SO

13”

MDP0027

EL1881C

Sync Separator, Low Power