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DM74ALS541 Octal Buffer and Line Driver with 3-STATE Outputs
October 1986
Revised February 2000
DM74ALS541
Octal Buffer and Line Driver with 3-STATE Outputs
General Description
This octal buffer and line driver is designed to have the per-
formance of the DM74ALS240A series and, at the same
time, offer a pinout with inputs and outputs on opposite
sides of the package. This arrangement greatly enhances
circuit board layout. The 3-STATE control gate is a 2-input
NOR such that if either G1 or G2 is HIGH, all eight outputs
are in the high impedance state.
Features
s
Advanced oxide-isolated ion-implanted Schottky TTL
process
s
Switching performance is guaranteed over full tempera-
ture and V
CC
supply range
s
Data flow-thru pinout (all inputs on opposite side from
outputs)
s
P-N-P Inputs reduce DC loading
Ordering Code:
Order Number
DM74ALS541WM
DM74ALS541SJ
DM74ALS541N
Package Number Package Description
M20B
M20D
N20A
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
Input
G1
H
X
L
L
G2
X
H
L
L
A
X
X
L
H
Output
Y
Hi-Z
Hi-Z
L
H
H
=
HIGH Logic Level
L
=
LOW Logic Level
X
=
Don't Care (Either LOW or HIGH Logic Level)
Hi-Z
=
High Impedance (OFF) State
© 2000 Fairchild Semiconductor Corporation
DS009171
www.fairchildsemi.com
DM74ALS541
Absolute Maximum Ratings
(Note 1)
Supply Voltage
Input Voltage: Control Inputs
Voltage Applied to a Disabled
3-STATE Output
Operating Free-Air Temperature Range
Storage Temperature Range
Typical
θ
JA
N Package
M Package
58.5°C/W
77.5°C/W
5.5V
0°C to
+70°C
−65°C
to
+150°C
Note 1:
The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
7V
7V
Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
0
Parameter
Min
4.5
2
0.8
−15
24
70
Nom
5
Max
5.5
Units
V
V
V
mA
mA
°C
Electrical Characteristics
over recommended free air temperature range
Symbol
V
IK
V
OH
Parameter
Input Clamp Voltage
HIGH Level
Output Voltage
V
OL
I
I
I
IH
I
IL
I
OZH
I
OZL
I
O
I
CC
LOW Level
Output Voltage
Input Current at Maximum
Input Voltage
HIGH Level Input Current
LOW Level Input Current
HIGH Level 3-STATE
Output Current
LOW Level 3-STATE
Output Current
Output Drive Current
Supply Current
V
CC
=
Max, V
I
=
7V
V
CC
=
Max, V
I
=
2.7V
V
CC
=
Max, V
I
=
0.4V
V
CC
=
Max, V
O
=
2.7V
V
CC
=
Max, V
O
=
0.4V
V
CC
=
Max, V
O
=
2.25V
V
CC
=
Max
Outputs HIGH
Outputs LOW
Outputs Disabled
−30
6
15
13.5
Test Conditions
V
CC
=
Min, I
I
= −18
mA
V
CC
=
4.5V to 5.5V
V
CC
=
Min
V
CC
=
Min
I
OH
= −0.4
mA
I
OH
= −3
mA
I
OH
=
Max
I
OL
=
12 mA
I
OL
=
24 mA
V
CC
−
2
2.4
2
0.25
0.35
0.4
0.5
100
20
−100
20
−20
−112
14
25
22
mA
mA
µA
µA
µA
µA
µA
mA
3.2
V
Min
Typ
Max
−1.2
Units
V
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2
DM74ALS541
Switching Characteristics
over recommended operating free air temperature range
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Parameter
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Output Enable Time
to HIGH Level Output
Output Enable Time
to LOW Level Output
Output Disable Time
from HIGH Level Output
Output Disable Time
from LOW Level Output
Conditions
V
CC
=
4.5V to 5.5V,
R
1
=
R
2
=
500Ω,
C
L
=
50 pF
From (Input)
To (Output)
A to Y
A to Y
Min
4
2
Max
14
10
Units
ns
ns
G to Y
5
15
ns
G to Y
8
20
ns
G to Y
1
10
ns
G to Y
2
12
ns
3
www.fairchildsemi.com
DM74ALS541
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
www.fairchildsemi.com
4
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