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参数资料
| 型号： | NTE874 |
| 厂商： | NTE Electronics, Inc. |
| 英文描述： | Integrated Circuit TV Horiz/Vert Countdown System Circuit |
| 中文描述： | 集成电路电视Horiz /垂直倒计时系统电路 |
| 文件页数： | 6/7页 |
| 文件大小： | 43K |
| 代理商： | NTE874 |
Electrical Characteristics (Cont
’
d): (
T
A
= +25
°
C, V
CC
= 12V
DC
, V25 = 12V
DC
, Pin 2, 15, 22 to
GND;, 1
μ
F from Pin 4 to GND., 10K ohms from Pin 28 to GND., F
CLK
= 1MHz, (AC Coupled),
V
Sync
1.2V to 4V, V
IV
1.9V to 2.8V, V
FA
0.2V to 0.7V)
Parameter
Test Conditions
Vertical Drive Section (Cont
’
d)
Non
–
Standard Vertical
Pulse Width
Clock Window, Number of
Clock Cycles Output is On
Non
–
Standard Mode Asynch-
ronous Divide Ratio
Fields, i.e., on 8th Field)
Blanking Pulse Width
–
Noise Mode Change
IV Outside the Range of
(16784
–
16832) Sync = 9
Serrations in 384 Clock Win-
dow Pulse Applied 2432 to
11520 After an IV, Pulse is 8
to 32 Clocks Wide. Resync
results in next field and is
maintained for Mode Change
Confidence Count
Force Non
–
Standard Mode
IV = 16800 Sync = 9 Serra-
tions Within 384 Clock Win-
dow. VFA Open Circuit Verti-
cal Pulse Width M Measured
in Next Field.
PIN #
Min
Typ
Max
Units
Sync 9 Serrations Within 384
11
362
364
367
–
No IV or Sync Applied (After 7
11, 16
–
–
21888
–
16
1200
–
1216
–
1220
16800
–
–
11,16
11
362
364
367
μ
s
Note 1 All timing measurements are with reference to the leading edge of the fly
–
back pulse input
to Pin 18. Fly
–
back pulse width is 12.00
μ
s and it is from 0 to 5V. Fly
–
back pulse train should
start about 500
μ
s after the start of vertical drive pulse.
Note 2 Start of fly
–
back pulse is 90 degrees leading with clock.
Note 3 Start of fly
–
back pulse is 90 degrees lagging with clock.
Note 4 Threshold for measuring AGC gate and horizontal blanking is 3V and burst gate is at 9V.
Note 5. Timing measurements referenced to trailing edge of negative sync pulse input to Pin 26. The
negative sync pulse width is is 4.5
μ
s and is from 0 to 500
μ
A, with negative leading edge
delayed 0.5
μ
s from the positive leading edge of the fly
–
back pulse. The input to Pin 27 is
+4V
DC
.
Note 6 IV Ratio same as in Non
–
Standard Mode Ratio Range Test.
Note 7 IV Ratio same as in Standard Mode Ratio Test.
Note 8 Burst Gate Start is with reference to trailing edge of sync pulse at Pin 26. Sync Pulse is a
500
μ
A Sink Current at Pin 26
.
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