3

EL1881C

Sync Separator, Low Power

Pin Descriptions

Pin Number

Pin Name

Pin Function

1

Composite

Sync Out

Composite sync pulse output; sync pulses start on a falling edge and end on a rising edge

2

Composite

Video In

AC coupled composite video input; sync tip must be at the lowest potential (positive picture phase)

3

Vertical Sync

Out

Vertical sync pulse output; the falling edge of vert sync is the start of the vertical period

4

GND

Supply ground

5

Burst/Back

Porch Output

Burst/back porch output; low during burst portion of composite video

6

An external resistor to ground sets all internal timing; a 681k 1% resistor will provide correct timing for NTSC signals

7

Odd/Even

Output

Odd/even field output; high during odd fields, low during even fields; transitions occur at start of vert sync pulse

8

Positive supply (5V)