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参数资料
| 型号： | NTE7138 |
| 厂商： | NTE Electronics, Inc. |
| 英文描述： | Integrated Circuit Advanced Monitor Video Controller for OSD |
| 中文描述： | 集成电路高级监视器视频控制器OSD |
| 文件页数： | 4/7页 |
| 文件大小： | 54K |
| 代理商： | NTE7138 |
Electrical Characteristics (Cont
’
d):
(V
P
= 8V, T
A
= +25
°
C, Note 3, Note 4 unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Crosstalk at Voltage Outputs with Speed Up Circuit
(Note 18)
Transient Crosstalk
Threshold Voltages for Clamping, Blanking and Switch
–
Off
(Note 19)
Threshold for Horizontal Blanking
(Blanking, Output Clamping)
Threshold for Switch
–
Off (Blanking,
Minimum Black
–
Level, No Output
Clamping)
Input Resistance
Delay Between Horizontal Blanking
Input and Output Signal Blanking
Threshold for Vertical Blanking
(Blanking, No Input Clamping)
Threshold for Vertical Blanking
(Input Clamping, No Blanking)
Threshold for Test Mode
(No Clamping, No Blanking
See V
bl(TST)
Above)
Current
α
ct(tr)
–
–
–
20
dB
V
i(HBL)
1.2
1.4
1.6
V
5.8
6.5
6.8
V
R
i(HBL)
t
d(Hblank)
Against GND
Input Rise Time at Pin9 > 100ns,
Note 20
Note 20
50
–
80
40
110
60
k
ns
V
i(CL)
1.2
1.4
1.6
V
2.6
3.0
3.5
V
For Test Mode Also,
V
i(HBL)
> 6.8V (Switch
–
Off)
V
P
–
1
–
V
P
V
I
i(CL)
V
i(CL)
< V
P
–
1V
V
i(CL)
≥
V
P
–
1V
Note 20
–
3
–
1
–
μ
A
μ
A
ns/V
μ
s
ns
Rise and Fall Time for Clamping Pulse
Width of Clamping Pulse
Delay Between Vertical Blanking Input
and Internal Blanking
t
r(CL)
, t
f(CL)
t
w(clamp)
t
d(Vblank)
–
–
–
75
–
380
0.6
260
Note 20
320
Notes to the Characteristics:
Note 3. All voltages measured to GND (Pin4).
Note 4. Definition of levels:
a)
Artificial black level:
internal signal level behind input emitter follower during input
clamping and signal clipping. This level is inserted instead of the input signal during
blanking.
b)
Reference black level:
DC voltage during output clamping at voltage outputs, not
influenced by brightness, contrast or gain setting, adjustable by cut
–
off stabilization.
c)
Cut
–
off level:
corresponding DC voltage at CRT cathode in closed feedback loop.
d)
Black level:
actual signal black level at either the voltage outputs or cathode, it can
be adjusted by (brightness x gain), it refers to reference black level or cut
–
off level.
e)
Ultra
–
black level, switch
–
off level:
lowest adjustable reference black level, lowest
signal level at voltage outputs.
f) The minimum guaranteed control range for reference black level is 0.1 to 1.0V. The
ultra
–
black level is dependent on the external resistor R
O
at Pin13, Pin16 and Pin19
(voltage outputs) to GND.
R
o
3.5k
+ R
o
Note 5. Linear control range is 1 to 6V for V
i(BC)
, independent of supply voltage.
Note 6. Linear control range is 1 to 6V vor V
i(BC)
, independent of supply voltage. Open Pin6 leads
to maximum contrast setting. It is recommended not to exceed V
i(CC)
= V
P
–
1V to avoid satu-
ration of internal circuitry. For V
i(CC)
< V
i(CC)
≈
0.7V a small negative signal (
≈
–
40dB) will
appear. For frequency dependency of contrast control, see Note 18.
Note 7. Definition for nominal output signals: input V
i(b
–
w)
= 0.7V, gain Pin3 and Pin11 open
–
circuit,
contrast control V
i(CC)
= V
i(CC)(nom)
.
g) V
bl(SO)
≈
x 4.65V
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