ISL59885_06 Datasheet, PDF (4/14 Pages) Intersil Corporation – Auto-Adjusting Sync Separator for HD and SD Video

ISL59885
Pin Descriptions
PIN NUMBER
1
2
3
PIN NAME
COMPOSITE
SYNC OUT
COMPOSITE
VIDEO IN
VERTICAL
SYNC OUT
4
GND
5
HD
6
CSET
7
HORIZONTAL
OUTPUT
8
VDD
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
Low when input horizontal frequency is greater than 20kHz
(An external capacitor to ground); bypass pin for internal bias generator.
Horizontal output; falling edge active
Positive supply
Typical Performance Curves
V_DD=3.3 & 5.0V
V_DD=3.3 & 5.0V
H_SYNC (kHz)
FIGURE 1. H_SYNC vs V_CSET (R_SET = OPEN)
V_DD=3.3 & 5.0V
V_CSET (V)
FIGURE 3. H_SYNC vs V_CSET (R_SET = OPEN)
4
H_SYNC FREQUENCY (kHZ)
FIGURE 2. H_SYNC PULSEWIDTH vs H_SYNC FREQUENCY
(R_SET = OPEN)
0.5V/DIV
5V/DIV
5V/DIV
VIN
HSYNC
VSYNC
5V/DIV
CSYNC
100µs/DIV
FIGURE 4. MACROVISION COMPATIBILITY (NTSC)
FN7442.5
August 9, 2006