SN54/74LS245
OCTAL BUS TRANSCEIVER
The SN54 / 74LS245 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.
OCTAL BUS TRANSCEIVER
LOW POWER SCHOTTKY
•
•
•
•
Hysteresis Inputs to Improve Noise Immunity
2-Way Asynchronous Data Bus Communication
Input Diodes Limit High-Speed Termination Effects
ESD > 3500 Volts
LOGIC AND CONNECTION DIAGRAMS DIP
(TOP VIEW)
VCC
20
E
19
B1
18
B2
17
B3
16
B4
15
B5
14
B6
13
B7
12
B8
11
20
1
J SUFFIX
CERAMIC
CASE 732-03
1
DIR
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
10
GND
20
1
N SUFFIX
PLASTIC
CASE 738-03
TRUTH TABLE
INPUTS
E
L
L
H
DIR
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
Isolation
OUTPUT
20
1
DW SUFFIX
SOIC
CASE 751D-03
ORDERING INFORMATION
SN54LSXXXJ
Ceramic
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
GUARANTEED OPERATING RANGES
Symbol
VCC
TA
IOH
Supply Voltage
Operating Ambient Temperature Range
Output Current — High
Parameter
54
74
54
74
54, 74
54
74
IOL
Output Current — Low
54
74
Min
4.5
4.75
– 55
0
Typ
5.0
5.0
25
25
Max
5.5
5.25
125
70
– 3.0
– 12
– 15
12
24
Unit
V
°C
mA
mA
mA
FAST AND LS TTL DATA
5-398
MOTOROLA [ MOTOROLA, INC ]
