74AC540 Datasheet, PDF (1/7 Pages) Fairchild Semiconductor – Octal Buffer/Line Driver with 3-STATE Outputs

November 1988
Revised November 1999
74AC540
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The AC540 is an octal buffer/line drivers designed to be
employed as memory and address drivers, clock drivers
and bus oriented transmitter/receivers.
These devices are similar in function to the AC240 while
providing flow-through architecture (inputs on opposite side
from outputs). This pinout arrangement makes these
devices especially useful as output ports for microproces-
sors, allowing ease of layout and greater PC board density.
Features
s I_CC and I_OZ reduced by 50%
s 3-STATE inverting outputs
s Inputs and outputs opposite side of package, allowing
easier interface to microprocessors
s Output source/sink 24 mA
Ordering Code:
Order Number Package Number
Package Description
74AC540SC
74AC540SJ
74AC540MTC
M20B
M20D
MTC20
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74AC540PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
IEEE/IEC
Connection Diagram
Truth Table
Inputs
OE₁
OE₂
L
L
H
X
X
H
L
L
H = HIGH Voltage Level
L = LOW Voltage Level
FACT is a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation Ds009966
Outputs
I
H
L
X
Z
X
Z
L
H
X = Immaterial
Z = High Impedance
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