Datasheet

LMH1981
www.ti.com SNLS214H –APRIL 2006–REVISED MARCH 2013
Electrical Characteristics
(1)
Unless otherwise specified, all limits are ensured for T
A
= 25°C, V
CC
= V
CC1
= V
CC2
= V
CC3
= 3.3V, R
EXT
= 10 kΩ 1%,
R
L
= 10 kΩ, C
L
< 10 pF.Boldface limits apply at the temperature extremes. See Figure 2.
Symbol Parameter Conditions Min
(2)
Typ
(3)
Max
(2)
Units
I
CC
Supply Current No input signal V
CC
= 3.3V 9.5 11.5
mA
V
CC
= 5V 11 13.5
Video Input Specifications
V
IN-SYNC
Input Sync Amplitude Amplitude from negative sync tip to video 0.14 0.30 0.60
blanking level for SD/EDTV bi-level sync
(4)(5)(6)
V
PP
Amplitude from negative to positive sync tips 0.30 0.60 1.20
for HDTV tri-level sync
(4)(7)(6)
V
IN-CLAMP
Input Sync Tip Clamp Level 0.7 V
V
IN-SLICE
Input Sync Slice Level Level between video blanking & sync tip for 50 %
SD/EDTV and between negative & positive
sync tips for HDTV
Logic Output Specifications
(8)
V
OL
Output Logic 0 See output load conditions V
CC
= 3.3V 0.3
V
above
V
CC
= 5V 0.5
V
OH
Output Logic 1 See output load conditions V
CC
= 3.3V 3.0
V
above
V
CC
= 5V 4.5
T
SYNC-LOCK
Sync Lock Time Time for the output signals to be correct after 2 V
the video signal settles at V
IN
following a periods
significant input change. See START-UP
TIME for more information
T
VSOUT
Vertical Sync Output Pulse See Figure 3, Figure 4, Figure 5, Figure 6, 3 H
Width Figure 7, and Figure 8 for SDTV, EDTV & periods
HDTV Vertical Interval Timing
(1) Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very
limited self-heating of the device such that T
J
= T
A
. No ensured specification of parametric performance is indicated in the electrical
tables under conditions of internal self-heating where T
J
> T
A
.
(2) Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlations using the
Statistical Quality Control (SQC) method.
(3) Typical values represent the most likely parametric norm at the time of characterization. Actual typical values may vary over time and
will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped production
material.
(4) V
IN-AMPL
plus V
IN-CLAMP
should not exceed V
CC
.
(5) Tested with 480I signal.
(6) Maximum voltage offset between 2 consecutive input horizontal sync tips must be less than 25 mV
PP
.
(7) Tested with 720P signal.
(8) Outputs are negative-polarity logic signal, except for odd/even field and video format outputs.
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