74LS28 [MOTOROLA]
QUAD 2-INPUT NOR BUFFER; 四2输入或非缓冲器
| 型号： | 74LS28 |
| 厂家： | 
MOTOROLA |
| 描述： | QUAD 2-INPUT NOR BUFFER |
| 文件： | 总4页 (文件大小：124K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54/74LS28
QUAD 2-INPUT NOR BUFFER
QUAD 2-INPUT NOR BUFFER
LOW POWER SCHOTTKY
J SUFFIX
CERAMIC
CASE 632-08
14
1
N SUFFIX
PLASTIC
CASE 646-06
14
1
D SUFFIX
SOIC
CASE 751A-02
14
1
ORDERING INFORMATION
SN54LSXXJ
SN74LSXXN
SN74LSXXD
Ceramic
Plastic
SOIC
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
V
CC
Supply Voltage
54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
T
A
Operating Ambient Temperature Range
54
74
–55
0
25
25
125
70
°C
I
I
Output Current — High
Output Current — Low
54, 74
–1.2
mA
mA
OH
54
74
12
24
OL
FAST AND LS TTL DATA
5-75
SN54/74LS28
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Min
Typ
Max
Symbol
Parameter
Input HIGH Voltage
Unit
Test Conditions
Guaranteed Input HIGH Voltage for
All Inputs
V
IH
2.0
V
54
74
0.7
0.8
Guaranteed Input LOW Voltage for
All Inputs
V
V
V
Input LOW Voltage
V
IL
Input Clamp Diode Voltage
Output HIGH Voltage
–0.65
3.5
–1.5
V
V
V
V
V
= MIN, I = –18 mA
IN
IK
CC
54
74
2.5
2.7
= MIN, I
OH
= MAX, V = V
IN
CC
IH
OH
or V per Truth Table
IL
3.5
V
V
= V
CC
MIN,
= V or V
IL IH
54, 74
74
0.25
0.35
0.4
0.5
V
V
I
I
= 12 mA
= 24 mA
CC
IN
OL
V
Output LOW Voltage
Input HIGH Current
OL
per Truth Table
OL
20
µA
mA
mA
mA
V
V
V
V
= MAX, V = 2.7 V
IN
CC
CC
CC
CC
I
IH
0.1
= MAX, V = 7.0 V
IN
I
I
Input LOW Current
–0.4
–130
= MAX, V = 0.4 V
IN
IL
Short Circuit Current (Note 1)
–30
= MAX
OS
Power Supply Current
Total, Output HIGH
3.6
I
mA
V
CC
= MAX
CC
Total, Output LOW
13.8
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (T = 25°C)
A
Limits
Typ
12
Min
Max
24
Symbol
Parameter
Propagation Delay
Propagation Delay
Unit
ns
Test Conditions
t
PLH
V
= 5.0 V
CC
= 45 pF, R = 667 Ω
C
L
L
t
12
24
ns
PHL
FAST AND LS TTL DATA
5-76
Case 751A-02 D Suffix
14-Pin Plastic
SO-14
-A-
14
1
8
7
P
C
-B-
R X 45°
G
K
J
M
F
D
°
°
°
°
Case 632-08 J Suffix
14-Pin Ceramic Dual In-Line
-A-
14
1
8
7
-B-
C
L
-T-
K
M
F
G
N
J
D
°
°
°
°
Case 646-06 N Suffix
14-Pin Plastic
14
1
8
B
7
A
F
L
C
J
N
K
G
H
D
M
°
°
°
°
FAST AND LS TTL DATA
5-77
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