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Fairchild Semiconductor |
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 VCC 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 Package Number Package Description
DM74ALS541WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74ALS541SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74ALS541N
N20A
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 G2
A
HXX
XHX
LLL
L LH
H = HIGH Logic Level
L = LOW Logic Level
X = Don't Care (Either LOW or HIGH Logic Level)
Hi-Z = High Impedance (OFF) State
Output
Y
Hi-Z
Hi-Z
L
H
© 2000 Fairchild Semiconductor Corporation DS009171
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Free
Da
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 θJA
N Package
M Package
7V
7V
5.5V
0°C to +70°C
−65°C to +150°C
58.5°C/W
77.5°C/W
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.
Recommended Operating Conditions
Symbol
VCC
VIH
VIL
IOH
IOL
TA
Parameter
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
Min Nom
4.5 5
2
0
Electrical Characteristics
over recommended free air temperature range
Symbol
Parameter
Test Conditions
Min
VIK
VOH
VOL
II
IIH
IIL
IOZH
IOZL
IO
ICC
Input Clamp Voltage
HIGH Level
Output Voltage
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
VCC = Min, II = −18 mA
VCC = 4.5V to 5.5V
VCC = Min
VCC = Min
VCC = Max, VI = 7V
VCC = Max, VI = 2.7V
VCC = Max, VI = 0.4V
VCC = Max, VO = 2.7V
VCC = Max, VO = 0.4V
VCC = Max, VO = 2.25V
VCC = Max
IOH = −0.4 mA
IOH = −3 mA
IOH = Max
IOL = 12 mA
IOL = 24 mA
VCC − 2
2.4
2
Outputs HIGH
Outputs LOW
Outputs Disabled
−30
Max
5.5
0.8
−15
24
70
Typ
3.2
0.25
0.35
6
15
13.5
Units
V
V
V
mA
mA
°C
Max
−1.2
Units
V
V
0.4
0.5
100
20
−100
20
mA
µA
µA
µA
µA
−20
−112
14
25
22
µA
mA
mA
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