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參數資料
| 型號： | 74LS221N |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | LOW POWER SCHOTTKY |
| 中文描述： | 低功耗肖特基 |
| 文件頁數： | 4/8頁 |
| 文件大小： | 120K |
| 代理商： | 74LS221N |
SN74LS221
http://onsemi.com
4
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
V
T+
Positive-Going Threshold
Voltage at C Input
1.0
2.0
V
V
CC
= MIN
V
T–
Negative-Going Threshold
Voltage at C Input
0.7
0.8
V
V
CC
= MIN
V
T+
Positive-Going Threshold
Voltage at B Input
1.0
2.0
V
V
CC
= MIN
V
T–
Negative-Going Threshold
Voltage at B Input
0.8
0.9
V
V
CC
= MIN
V
IH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
A Input
V
IL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
A Input
V
IK
Input Clamp Voltage
–1.5
V
V
CC
= MIN, I
IN
= –18 mA
V
OH
Output HIGH Voltage
2.7
3.4
V
V
CC
= MIN, I
OH
= MAX
V
OL
Output LOW Voltage
0.35
0.5
V
I
OL
= 8.0 mA
V
CC
= MIN
I
IH
Input HIGH Current
20
μ
A
V
CC
= MAX, V
IN
= 2.7 V
0.1
mA
V
CC
= MAX, V
IN
= 7.0 V
I
IL
Input LOW Current
Input A
Input B
Clear
–0.4
–0.8
–0.8
mA
V
CC
= MAX, V
IN
= 0.4 V
I
OS
Short Circuit Current (Note 1)
–20
–100
mA
V
CC
= MAX
I
CC
Power Supply Current
Quiescent
4.7
11
mA
V
= MAX
CC
Triggered
19
27
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
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