LMH1981 Datasheet, PDF (3/24 Pages) National Semiconductor (TI) – Multi-Format Video Sync Separator

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
Video Input Specifications
No input signal
V_CC = 3.3V
V_CC = 5V
9.5
11.5
mA
11
13.5
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
for HDTV tri-level sync ^(4)(7)(6)
0.30
0.60
1.20
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
V_OH
Output Logic 1
T_SYNC-LOCK Sync Lock Time
See output load conditions
above
V_CC = 3.3V
V_CC = 5V
0.3
V
0.5
See output load conditions
V_CC = 3.3V
3.0
above
V_CC = 5V
4.5
V
Time for the output signals to be correct after
2
V
the video signal settles at V_IN following a
significant input change. See START-UP
periods
TIME for more information
T_VSOUT
Vertical Sync Output Pulse
Width
See Figure 3, Figure 4, Figure 5, Figure 6,
Figure 7, and Figure 8 for SDTV, EDTV &
HDTV Vertical Interval Timing
3
H
periods
(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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