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74F243 Datasheet

  • 74F243

  • Quad Bus Transceiver with 3-STATE Outputs

  • 35.69KB

  • 4頁

  • FAIRCHILD

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74F243 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
74F243SC
Package Number
M14A
Package Description
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 鈥淴鈥?to the ordering code.
Logic Symbol
IEEE/IEC
Connection Diagram
Truth Table
Inputs
E
1
L
L
H
H
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
Z
=
High Impedance
N/A
=
Not Allowed
Inputs/Outputs
E
2
L
H
L
H
A
n
Input
N/A
Z
A
=
B
B
n
B
=
A
N/A
Z
Input
Unit Loading/Fan Out
Pin
Description
Names
E
1
E
2
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
U.L.
Input I
IH
/I
IL
HIGH/LOW Output I
OH
/I
OL
20
碌A(chǔ)/鈭?
mA
20
碌A(chǔ)/鈭?
mA
70
碌A(chǔ)/鈭?.6
mA
600/106.6
鈭?2
mA/64 mA
(80)
(48 mA)
漏 1999 Fairchild Semiconductor Corporation
DS009502
www.fairchildsemi.com

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