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參數(shù)資料
| 型號(hào)： | HD74HC4538 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Dual Precision Retriggerable/Resettable Monostable Multivibrators |
| 中文描述： | 雙精密Retriggerable /復(fù)式單穩(wěn)態(tài)多頻振蕩器 |
| 文件頁(yè)數(shù)： | 10/16頁(yè) |
| 文件大?。?/td> | 81K |
| 代理商： | HD74HC4538 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)當(dāng)前第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
HD74HC4538
10
Trigger Input A
(Pin 4 or 12)
Trigger Input B
(Pin 5 or 11)
Trigger-Control
Circuit Output
T
2
Input
(Pin 2 or 14)
Upper Reference
Circuit Output
Lower Reference
Circuit Output
Reset Latch
Output
Vref Upper
Vref Lower
Q Output
(Pin 6 or 10)
Reset Input C
D
(Pin 3 or 13)
Quiescent
State
Trigger Cycle (A Input)
Trigger Cycle (B Input)
Reset
t
rr
Retrigger
A
A
B
B
50%
50%
50%
50%
(Retriggered Pulse)
50%
50%
50%
90%
10%
910%
90%
10%
50%
50%
Q
C
D
Q
Q
Q
t
WQ
t
W (H)
t
PLH
t
WQ
t
PLH
t
PHL
t
THL
t
PLH
t
f
t
r
t
rr
t
WQ
+t
rr
t
TLH
t
W (L)
t
PHL
t
PHL
t
W (L)
t
WQ
t
WQ
+t
rr
7
8
21
17
14
24
25
22
20
23
9
3
4
5
6
1
2
1115
13
12
13
10
19
16
Fig. 2 Timing Diagram
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