LMH1981 Datasheet, PDF (9/24 Pages) National Semiconductor (TI) – Multi-Format Video Sync Separator

LMH1981
www.ti.com
SNLS214H – APRIL 2006 – REVISED MARCH 2013
Table 1. SDTV Horizontal Interval Timing Characteristics (NTSC, PAL, 480I, 576I)⁽¹⁾⁽²⁾
Symbol
Parameter
Conditions
td_CSOUT
td_HSOUT
Composite Sync Output Propagation Delay from Input Sync See Figure 9
Reference (O_H)
Horizontal Sync Output Propagation Delay from Input Sync See Figure 9⁽¹⁾
Reference (O_H)
NTSC, 480I
PAL, 576I
NTSC, 480I
PAL, 576I
td_BPOUT
Burst/Back Porch Timing Output Propagation Delay from
Input Sync Trailing Edge
See Figure 9
T_HSOUT
T_BPOUT
Horizontal Sync Output Pulse Width
Burst/Back Porch Timing Output Pulse Width
See Figure 9
See Figure 9
(1) Note: HSync propagation delay variation less than ±3 ns (typ) over 0°C to 70°C temperature range.
(2) V_CC = 3.3V , T_A = 25°C
Typ
Units
475
ns
525
40
ns
60
300
ns
2.5
µs
3.2
µs
Symbol
td_CSOUT
td_HSOUT
td_BPOUT
T_HSOUT
T_BPOUT
Table 2. EDTV Horizontal Interval Timing Characteristics (480P, 576P)
Parameter
Conditions
Typ
Composite Sync Output Propagation Delay from Input Sync
See Figure 9
450
Reference (O_H)
Horizontal Sync Output Propagation Delay from Input Sync
See Figure 9
35
Reference (O_H)
Burst/Back Porch Timing Output Propagation Delay from Input Sync See Figure 9
500
Trailing Edge
Horizontal Sync Output Pulse Width
See Figure 9
2.3
Burst/Back Porch Timing Output Pulse Width
See Figure 9
350
Units
ns
ns
ns
µs
ns
HDTV Horizontal Interval Timing
VIDEO INPUT RANGE
0.5 V_PP to 2 V_PP
1 V_PP (typ.)
V_IN
LEADING
EDGE
O_H
50%
TRAILING _{+ SYNC}
EDGE
50%
50%
SLICE
- SYNC
CSOUT
td_CSOUT
WHITE LEVEL
VIDEO
BLANKING LEVEL
HSOUT
td_HSOUT
BPOUT
T_HSOUT
td_BPOUT
T_BPOUT
Figure 10. HDTV Horizontal Interval with Tri-level Sync
Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LMH1981
Submit Documentation Feedback
9