The SN74LS245 is an Octal Bus Transmitter/Receiver designed for
8-line asynchronous 2-way data communication between data buses.
Direction Input (DR) controls transmission of Data from bus A to bus
B or bus B to bus A depending upon its logic level. The Enable input
(E) can be used to isolate the buses.
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• Hysteresis Inputs to Improve Noise Immunity
• 2-Way Asynchronous Data Bus Communication
• Input Diodes Limit High-Speed Termination Effects
• ESD > 3500 Volts
LOW
POWER
SCHOTTKY
LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW)
V
CC
E
B1 B2 B3 B4 B5 B6 B7 B8
20 19 18 17 16 15 14 13 12
11
20
1
PLASTIC
N SUFFIX
CASE 738
1
2
3
4
5
6
8
9
10
7
DIR A1 A2 A3 A4 A5 A6 A7 A8 GND
TRUTH TABLE
INPUTS
OUTPUT
E
DIR
20
L
L
H
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
Isolation
1
SOIC
DW SUFFIX
CASE 751D
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
GUARANTEED OPERATING RANGES
Symbol
Parameter
Supply Voltage
Min
4.75
0
Typ
5.0
25
Max
5.25
70
Unit
V
ORDERING INFORMATION
V
CC
Device
Package
16 Pin DIP
16 Pin
Shipping
T
A
Operating Ambient
Temperature Range
°C
SN74LS245N
1440 Units/Box
I
Output Current – High
–3.0
–15
24
mA
mA
mA
OH
SN74LS245DW
2500/Tape & Reel
I
OL
Output Current – Low
Semiconductor Components Industries, LLC, 1999
1
Publication Order Number:
December, 1999 – Rev. 6
SN74LS245/D