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參數(shù)資料
| 型號： | LMH1251 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | YPBPR to RGB Decoder and 2:1 Video Switch |
| 中文描述： | 色差到RGB解碼器和2:1視頻開關(guān) |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 614K |
| 代理商： | LMH1251 |
Sync Signal Electrical Characteristics
(Continued)
Unless otherwise noted: T
= 25C, V
= +5.0V, Y Video
= 0.7 V
, P
P
Video
=
±
350 VmV, C
L
= 8 pF,
Video Outputs = 0.7 V
PP
. See (Note 7) for Min and Max parameters and (Note 6) for typicals.
Symbol
Parameter
t
Y-HSYNC-DELAY
50% of H SYNC Input to Output
Composite SYNC on Y Input
(Not During Vertical Period)
Conditions
Min
Typ
70
Max
Units
ns
System Interface Signal Characteristics
Unless otherwise noted:
= 25C, V
= +5.0V, Y Video
= 0.7 V
, P
P
Video
=
±
350 VmV, C
L
= 8 pF,
Video Outputs = 0.7 V
PP
. See (Note 7) for Min and Max parameters and (Note 6) for typicals
Symbol
Parameter
V
IL
Logic Low Input Voltage
(Pins 24, 23, 22, 21)
V
IH
Logic High Input Voltage
(Pins 24, 23, 22, 21)
I
L
Logic Low Input Current
(Pins 24, 23, 22, 21)
I
H
Logic High Input Voltage
(Pins 24, 23, 22, 21)
V
OL
Logic Low Output Voltage
(Pins 24, 23, 22, 21)
Conditions
Min
0.5
Typ
Max
1.5
Units
V
3.0
V
CC
+0.5
V
Input Voltage = 0.4V
±
10
μA
Input Voltage = 0.4V
±
10
μA
IO = 3 mA
0.5
V
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications, see the Electrical Characteristics tables.
Note 2:
Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. All video inputs must be properly
terminated.
Note 3:
All voltages are measured with respect to GND, unless otherwise specified.
Note 4:
Human Body Model: 100 pF discharged through a 1.5 k
resistor.
Note 5:
Input from RGB signal generator: t
r
, t
f
= 1.5 ns. Input from SDTV YP
B
P
R
signal generator: t
r
, t
f
= 15 ns. Input from HDTV YP
B
P
R
signal generator: t
r
, t
f
= 8 ns.
Note 6:
Typical specifications are specified at +25C and represent the most likely parametric norm.
Note 7:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. The guaranteed specifications apply only for the test conditions
listed. Some performance characteristics may change when the device is not operated under the listed test conditions.
Note 8:
The supply current specified is the quiescent current for V
CC
and 5V with R
L
=
∞
. Load resistors are not required and are not used in the test circuit;
therefore, all the supply current is used by the device.
Note 9:
Linearity Error is the maximum variation in step height of a 16 step staircase input signal waveform with a 0.7 V
PP
level at the input. All 16 are steps equal,
with each at least 100 ns in duration.
Note 10:
A
track is a measure of the ability of any two amplifiers to track each other and quantifies the matching of the three gain stages. It is the difference in
gain change between any two amplifiers with the contrast set to A
C-50% and measured relative to the A
max condition. For example, at A
max the three
amplifiers’ gains might be 12.1 dB, 11.9 dB, and 11.8 dB and change to 2.2 dB, 1.9 dB and 1.7 dB respectively for contrast set to A
V
C-50%. This yields a typical gain
change of 10.0 dB with a tracking change of
±
0.2 dB.
Note 11:
The Machine Model ESD test is covered by specification EIAJ IC-121-1981. A 200 pF cap is charged to the specific voltage, then discharged directly into
the IC with no external series resistor (resistance of discharge path must be under 50
).
Note 12:
Measure output levels of the other two undriven amplifiers relative to the driven amplifier to determine channel separation. Terminate the undriven amplifier
inputs to simulate generator loading. Repeat test at f
IN
= 10 MHz for V
SEP
10 MHz.
Note 13:
Any three color bar signals can be used as test signals. The RGB outputs shall be used to calculate the amplitudes and phases of the chrominance results.
These should fall within the limits specified.
L
www.national.com
5
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMH1251EVAL | 制造商:Texas Instruments 功能描述:Evaluation Board For LMH1251 Analog Video Switch 制造商:OC White Company 功能描述:Evaluation Board For LMH1251 Analog Video Switch |
| LMH1251EVAL/NOPB | 功能描述:視頻 IC 開發(fā)工具 LMH1251 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Boards 類型:YPbPr to RGBHV Converters 工具用于評估:LMH1251 工作電源電壓:5 V |
| LMH1251MT | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| LMH1251MT/NOPB | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| LMH1251MT-NOPB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:YPBPR Path: 70 MHz, a??3 dB, 700 mVPP Bandwidth |
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