SN54-74LS540 Datasheet, PDF (1/3 Pages) ON Semiconductor – OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS

OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
The SN54 / 74LS540 and SN54 / 74LS541 are octal buffers and line drivers
with the same functions as the LS240 and LS241, but with pinouts on the
opposite side of the package.
These device types are designed to be used as memory address drivers,
clock drivers and bus-oriented transmitters / receivers. These devices are
especially useful as output ports for the microprocessors, allowing ease of
layout and greater PC board density.
• Hysteresis at Inputs to Improve Noise Margin
• PNP Inputs Reduce Loading
• 3-State Outputs Drive Bus Lines
• Inputs and Outputs Opposite Side of Package, Allowing Easier
Interface to Microprocessors
• Input Clamp Diodes Limit High-Speed Termination Effects
LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW)
SN54 / 74LS540
VCC
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
GND
VCC
SN54 / 74LS541
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
GND
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
54
74
TA
Operating Ambient Temperature Range
54
74
IOH
Output Current — High
54
74
IOL
Output Current — Low
54
74
SN54/74LS540
SN54/74LS541
OCTAL BUFFER / LINE DRIVER
WITH 3-STATE OUTPUTS
LOW POWER SCHOTTKY
20
1
20
1
20
1
J SUFFIX
CERAMIC
CASE 732-03
N SUFFIX
PLASTIC
CASE 738-03
DW SUFFIX
SOIC
CASE 751D-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
Min
Typ
Max
Unit
4.5
5.0
5.5
V
4.75
5.0
5.25
– 55
25
125
°C
0
25
70
– 12
mA
– 15
12
mA
24
FAST AND LS TTL DATA
5-1