ISL59450 Datasheet, PDF (32/37 Pages) Intersil Corporation – Multiformat Video Crosspoint with Integrated Sync Separator

ISL59450
Sync Separator NTSC Vertical Timing
SIGNAL 1a. COMPOSITE VIDEO INPUT, FIELD ONE
1.5µs ±0.1µs
TIME
3H
1
2
VERTICAL BLANKING INTERVAL = 20H
+H
-H
1271µs
+63.5µs
-0µs
3H
3H
3
4
5
6
7
8
9
10
19
20
21
H SYNC
INTERVAL
START OF
H
FIELD ONE
PRE-
H
EQUALIZING
PULSE INTERVAL
H
VERTICAL SYNC
PULSE INTERVAL
0.5H
POST-
EQUALIZING
PULSE INTERVAL
9 LINE VERTICAL INTERVAL
SIGNAL 1b. VERTICAL SYNC OUTPUT
H
REF SUBCARRIER PHASE,
COLOR FIELD ONE
SIGNAL 1c. HORIZONTAL SYNC OUTPUT
280µs
NOTES:
2. The composite sync output reproduces all the video input sync pulses, with a propagation delay.
3. Vertical sync leading edge is coincident with the first vertical serration pulse leading edge with a propagation delay.
4. Horizontal sync output produces the true “H” pulses of nominal width of 5µs. It has the same delay as the composite sync.
Sync Separator NTSC Horizontal Timing
CONDITIONS: V_D = 3.3V, T_A = +25°C
INPUT
DYNAMIC
RANGE
0.5V TO 2V
SYNC LEVEL
SYNC IN
COLOR BURST
50%
td_HOUT
H_OUT
SYNC
TIP
V_SYNC
(SYNC TIP
VOLTAGE)
V_SLICE
WHITE LEVEL
V_BLANK
(BLANKING LEVEL
VOLTAGE)
VIDEO
SYNC
t_HOUT
32
FN7510.0
February 14, 2008