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參數(shù)資料
| 型號(hào)： | 74LS221N |
| 廠商： | Motorola, Inc. |
| 英文描述： | DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS |
| 中文描述： | 雙單穩(wěn)多諧振蕩器與施密特觸發(fā)輸入 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 120K |
| 代理商： | 74LS221N |
SN74LS221
http://onsemi.com
2
(TOP VIEW)
Positive logic: Low input to clear resets Q low and
Positive logic:
Q high regardless of dc levels at A
Positive logic:
or B inputs.
14
13
12
11
10
9
1
2
1B
3
1
4
5
6
2
7
16
15
8
V
CC
1A
1 R
ext/
C
ext
1
C
ext
1Q
2Q
2B
2
CLR
2A
CLR
1Q
2Q
C
ext
2 R
ext
/
C
ext
GND
Q
Q
CLR
Q
Q
CLR
+
V
CC
R
ext
R/C
C
ext
FUNCTION TABLE
(EACH MONOSTABLE)
INPUTS
OUTPUTS
CLEAR
A
B
Q
Q
L
X
X
H
H
X
H
X
L
X
X
L
L
L
L
H
H
H
H
*
L
H
*See operational notes — Pulse Trigger Modes
TYPE
TYPICAL
POWER
DISSIPATION
23 mW
MAXIMUM
OUTPUT PULSE
LENGTH
70 s
SN74LS221
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|---|---|
| 74LS240 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Octal TRI-STATE Buffers/Line Drivers/Line Receivers |
| 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 |
| 74LS240DW MOT89 | 制造商:Motorola 功能描述:74LS240 MOT S1I2B |
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