SN74LS243 Motorola, SN74LS243 Datasheet

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SN74LS243

Manufacturer Part Number
SN74LS243
Description
QUAD BUS TRANSCEIVER
Manufacturer
Motorola
Datasheet

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QUAD BUS TRANSCEIVER
ceivers designed for 4-line asynchronous 2-way data communications
between data buses.
GAB
The SN54/ 74LS242 and SN54 / 74LS243 are Quad Bus Transmitters / Re-
Hysteresis at Inputs to Improve Noise Immunity
2-Way Asynchronous Data Bus Communication
Input Clamp Diodes Limit High-Speed Termination Effects
H
INPUTS
L
L
V CC
V CC
GBA
GBA
LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW)
14
14
1
1
D
H
L
X
GBA
GBA
NC
NC
13
13
2
2
OUTPUT
OUTPUT
SN54 / 74LS242
NC
1A
SN54 / 74LS243
NC
1A
12
12
3
3
(Z)
H
L
SN54 / 74LS242
1B
2A
1B
2A
11
11
4
4
2B
3A
2B
3A
10
10
5
5
GAB
H
H
L
INPUTS
3B
3B
4A
4A
9
6
9
6
D
H
X
L
GND
GND
4B
4B
8
7
8
7
OUTPUT
OUTPUT
FAST AND LS TTL DATA
(Z)
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = HIGH Impedance
L
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
TRUTH TABLES
5-393
GAB
H
L
L
INPUTS
D
H
X
L
OUTPUT
OUTPUT
(Z)
14
14
H
L
QUAD BUS TRANSCEIVER
SN54/74LS242
SN54/74LS243
SN54/74LS243
ORDERING INFORMATION
14
LOW POWER SCHOTTKY
1
1
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXDW SOIC
1
GAB
H
H
L
INPUTS
D
X
H
L
Ceramic
Plastic
CASE 751A-02
CASE 632-08
CASE 646-06
CERAMIC
N SUFFIX
D SUFFIX
J SUFFIX
PLASTIC
SOIC
OUTPUT
OUTPUT
(Z)
H
L

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SN74LS243 Summary of contents

Page 1

QUAD BUS TRANSCEIVER The SN54/ 74LS242 and SN54 / 74LS243 are Quad Bus Transmitters / Re- ceivers designed for 4-line asynchronous 2-way data communications between data buses. Hysteresis at Inputs to Improve Noise Immunity 2-Way Asynchronous Data Bus Communication Input ...

Page 2

SN54/74LS242 SN54/74LS243 GUARANTEED OPERATING RANGES Symbol Parameter V CC Supply Voltage T A Operating Ambient Temperature Range I OH Output Current — High Output Current — Low DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE Symbol Symbol Parameter Parameter ...

Page 3

SN54/74LS242 SN54/74LS243 AC CHARACTERISTICS ( 5.0 V) Symbol Symbol Symbol Parameter Parameter Parameter t PLH Propagation Delay, Data to Output t PHL t PZH Output Enable Time to HIGH Level t PZL Output ...

Page 4

P - SEATING PLANE 0.25 (0.010 - - -T- SEATING PLANE ...

Page 5

... Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications. All operating parameters, including “ ...

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