74F243 Datasheet, PDF (1/4 Pages) Fairchild Semiconductor – Quad Bus Transceiver with 3-STATE Outputs

April 1988
Revised July 1999
74F243
Quad Bus Transceiver with 3-STATE Outputs
General Description
The 74F243 is a quad bus transmitter/receiver designed for
4-line asynchronous 2-way data communications between
data busses.
Features
s 2-Way asynchronous data bus communication
s Input clamp diodes limit high-speed termination effects
Ordering Code:
Order Code Package Number
Package Description
74F243SC
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
IEEE/IEC
Truth Table
H = HIGH Voltage Level
L = LOW Voltage Level
Inputs
E₁
E₂
L
L
L
H
H
L
H
H
Z = High Impedance
N/A = Not Allowed
Unit Loading/Fan Out
Inputs/Outputs
A_n
Input
N/A
Z
A=B
B_n
B=A
N/A
Z
Input
Pin
Names
Description
U.L.
Input I_IH/I_IL
HIGH/LOW Output I_OH/I_OL
E₁
E₂
A_n, B_n
Enable Input (Active LOW)
Enable Input (Active HIGH)
Inputs
Outputs
1.0/1.67
1.0/1.67
3.5/2.67
600/106.6
(80)
20 µA/−1 mA
20 µA/−1 mA
70 µA/−1.6 mA
−12 mA/64 mA
(48 mA)
© 1999 Fairchild Semiconductor Corporation DS009502
www.fairchildsemi.com