SN54LS241J [MOTOROLA]
OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS; 八路缓冲器/ 3态输出线路驱动器
| 型号： | SN54LS241J |
| 厂家： | 
MOTOROLA |
| 描述： | OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS |
| 文件： | 总6页 (文件大小：194K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54/74LS240
SN54/74LS241
SN54/74LS244
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
The SN54/74LS240, 241 and 244 are Octal Buffers and Line Drivers
designed to be employed as memory address drivers, clock drivers and
bus-oriented transmitters/receivers which provide improved PC board
density.
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
• Hysteresis at Inputs to Improve Noise Margins
• 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers
• Input Clamp Diodes Limit High-Speed Termination Effects
LOW POWER SCHOTTKY
LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW)
J SUFFIX
CERAMIC
SN54/74LS240
CASE 732-03
20
1
N SUFFIX
PLASTIC
CASE 738-03
20
1
DW SUFFIX
SOIC
CASE 751D-03
SN54/74LS241
20
1
ORDERING INFORMATION
SN54LSXXXJ
Ceramic
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
SN54/74LS244
FAST AND LS TTL DATA
5-387
SN54/74LS240 • SN54/74LS241 • SN54/74LS244
TRUTH TABLES
SN54/74LS240
INPUTS
SN54/74LS244
INPUTS
OUTPUT
OUTPUT
1G, 2G
D
1G, 2G
D
L
L
H
L
H
X
H
L
(Z)
L
L
H
L
H
X
L
H
(Z)
SN54/74LS241
INPUTS
INPUTS
OUTPUT
OUTPUT
1G
D
2G
D
L
L
H
L
H
X
L
H
(Z)
H
H
L
L
H
X
L
H
(Z)
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = HIGH Impedance
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
Operating Ambient Temperature Range
Output Current — High
54
74
–55
0
25
25
125
70
°C
A
54, 74
–3.0
mA
mA
I
OH
54
74
–12
–15
I
Output Current — Low
54
74
12
24
mA
OL
FAST AND LS TTL DATA
5-388
SN54/74LS240 • SN54/74LS241 • SN54/74LS244
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
V
2.0
V
IH
54
74
0.7
0.8
Guaranteed Input LOW Voltage for
All Inputs
Input LOW Voltage
V
IL
V
V
–V
Hysteresis
0.2
0.4
–0.65
3.4
V
V
V
V
V
V
V
V
= MIN
T+ T–
CC
CC
CC
CC
Input Clamp Diode Voltage
–1.5
= MIN, I = –18 mA
IN
IK
54, 74
54, 74
2.4
2.0
= MIN, I
= –3.0 mA
= MAX
OH
OH
V
V
Output HIGH Voltage
Output LOW Voltage
OH
= MIN, I
V
CC
V
IN
= V
MIN,
= V or V
54, 74
74
0.25
0.35
0.4
0.5
V
V
I
= 12 mA
= 24 mA
CC
OL
IL
IH
OL
I
per Truth Table
OL
I
I
Output Off Current HIGH
Output Off Current LOW
20
–20
20
µA
µA
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= MAX, V
= MAX, V
= 2.7 V
= 0.4 V
OZH
OUT
OZL
OUT
µA
= MAX, V = 2.7 V
IN
I
IH
Input HIGH Current
Input LOW Current
0.1
mA
mA
mA
= MAX, V = 7.0 V
IN
I
I
–0.2
–225
= MAX, V = 0.4 V
IN
IL
Output Short Circuit Current (Note 1)
–40
= MAX
OS
Power Supply Current
Total, Output HIGH
27
44
46
50
54
Total, Output LOW
LS240
I
mA
V
CC
= MAX
CC
LS241/244
LS240
Total at HIGH Z
LS241/244
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (T = 25°C, V
CC
= 5.0 V)
A
Limits
Typ
Symbol
Parameter
Unit
Test Conditions
Min
Max
t
t
Propagation Delay, Data to Output
LS240
9.0
12
14
18
PLH
PHL
ns
t
t
Propagation Delay, Data to Output
LS241/244
12
12
18
18
PLH
PHL
C
L
R
L
= 45 pF,
= 667 Ω
ns
t
t
t
t
Output Enable Time to HIGH Level
Output Enable Time to LOW Level
Output Disable Time from LOW Level
Output Disable Time from HIGH Level
15
20
15
10
23
30
25
18
ns
ns
ns
ns
PZH
PZL
PLZ
PHZ
C
R
= 5.0 pF,
= 667 Ω
L
L
FAST AND LS TTL DATA
5-389
SN54/74LS240 • SN54/74LS241 • SN54/74LS244
AC WAVEFORMS
Figure 1
Ω
Figure 2
SWITCH POSITIONS
≈
Figure 3
Figure 5
≥
≈
Figure 4
FAST AND LS TTL DATA
5-390
Case 751D-03 DW Suffix
20-Pin Plastic
SO-20 (WIDE)
-A-
20
1
11
10
-B-
P
G
R X 45°
C
-T-
M
J
F
°
°
°
°
K
D
Case 732-03 J Suffix
20-Pin Ceramic Dual In-Line
20
11
10
1
B
C
A
L
F
N
K
J
M
H
G
D
°
°
°
°
Case 738-03 N Suffix
20-Pin Plastic
-A-
20
1
11
10
B
C
L
-T-
K
E
N
M
J
G
F
D
°
°
°
°
FAST AND LS TTL DATA
5-391
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SYMBOL
SW1
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Closed
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Literature Distribution Centers:
USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036.
t
Open
PZH
EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England.
JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan.
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ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong.
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