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參數(shù)資料
| 型號(hào)： | 74LS221 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs |
| 中文描述： | 雙非Retriggerable一個(gè)明確和互補(bǔ)輸出鉛球 |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大小： | 120K |
| 代理商： | 74LS221 |
SN74LS221
http://onsemi.com
6
AC WAVEFORMS
B INPUT
CLEAR
Q OUTPUT
Q OUTPUT
A INPUT IS LOW.
B INPUT
CLEAR
Q OUTPUT
A INPUT IS LOW.
B INPUT
CLEAR
Q OUTPUT
A INPUT IS LOW.
t
W(in)
≥
60 ns
t
PLH
t
PHL
t
PLH
t
PHL
1.3 V
3 V
0 V
3 V
0 V
V
OH
V
OL
V
OH
V
OL
≥
60 ns
1.3 V
1.3 V
3 V
0 V
3 V
0 V
V
OH
V
OL
≥
50 ns
≥
0
t
s
3 V
0 V
3 V
0 V
V
OH
V
OL
3 V
0 V
3 V
0 V
V
OH
V
OL
TRIGGERED
NOT TRIGGERED
≥
50 ns
≥
50 ns
B INPUT
CLEAR
Q OUTPUT
A INPUT IS LOW.
t
W(out)
TRIGGER FROM B, THEN CLEAR — CONDITION 1
TRIGGER FROM B, THEN CLEAR — CONDITION 2
CLEAR OVERRIDING B, THEN TRIGGER FROM B
TRIGGERING FROM POSITIVE TRANSITION OF CLEAR
Figure 1.
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|---|---|
| 74LS221N | 制造商:Texas Instruments 功能描述: |
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| 74LS240 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74LS240D | 制造商:Misc 功能描述: |
| 74LS240DC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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