EL1881C
EL1881C
Sync Separator, Low Power
Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
Pin Name
Composite
Sync Out
Composite
Video In
Vertical Sync
Out
GND
Burst/Back
Porch Output
R
SET [1]
Odd/Even
Output
V
DD
5V
Pin Function
Composite sync pulse output; sync pulses start on a falling edge and end on a rising edge
AC coupled composite video input; sync tip must be at the lowest potential (positive picture phase)
Vertical sync pulse output; the falling edge of vert sync is the start of the vertical period
Supply ground
Burst/back porch output; low during burst portion of composite video
An external resistor to ground sets all internal timing; a 681k 1% resistor will provide correct timing for NTSC signals
Odd/even field output; high during odd fields, low during even fields; transitions occur at start of vert sync pulse
Positive supply (5V)
1. R
SET
must be a 1% resistor
3
ELANTEC [ ELANTEC SEMICONDUCTOR ]
