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National Semiconductor Electronic Components Datasheet

74F243 Datasheet

Quad Bus Transceiver

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November 1994
54F 74F243
Quad Bus Transceiver with TRI-STATE Outputs
General Description
The ’F243 is a quad bus transmitter receiver designed for
4-line asynchronous 2-way data communications between
data busses
Features
Y 2-Way asynchronous data bus communication
Y Input clamp diodes limit high-speed termination effects
Y Guaranteed 4000V minimum ESD protection
Commercial
74F243SC (Note 1)
Military
54F243DM (Note 2)
54F243FM (Note 2)
54F243LM (Note 2)
Package
Number
J14A
M14A
W14B
E20A
Package Description
14-Lead Ceramic Dual-In-Line
14-Lead (0 150 Wide) Molded Small Outline JEDEC
14-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier Type C
Note 1 Devices also available in 13 reel Use Suffix e SCX
Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB
Logic Symbol
Connection Diagrams
IEEE IEC
Pin Assignment
for DIP SOIC and Flatpak
Pin Assignment
for LCC
TL F 9502–3
TL F 9502 – 1
TL F 9502 – 2
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 9502
RRD-B30M105 Printed in U S A


National Semiconductor Electronic Components Datasheet

74F243 Datasheet

Quad Bus Transceiver

No Preview Available !

Unit Loading Fan Out
54F 74F
Pin Names
Description
UL
HIGH LOW
Input IIH IIL
Output IOH IOL
E1
E2
An Bn
Enable Input (Active LOW) 1 0 1 67
20 mA b1 mA
Enable Input (Active HIGH) 1 0 1 67
20 mA b1 mA
Inputs
3 5 2 67
70 mA b1 6 mA
Outputs
600 106 6(80) b12 mA 64 mA(48 mA)
Truth Table
Inputs
E1 E2
LL
LH
HL
HH
Inputs Outputs
An
Input
NA
Z
AeB
Bn
BeA
NA
Z
Input
H e HIGH Voltage Level
L e LOW Voltage Level
Z e High Impedance
N A e Not Allowed
2


Part Number 74F243
Description Quad Bus Transceiver
Maker National Semiconductor
Total Page 6 Pages
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