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54LS253 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 54LS253
Description  TRI-STATE Data Selectors/Multiplexers
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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54LS253 Datasheet(HTML) 1 Page - National Semiconductor (TI)

   
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TLF6416
June 1989
54LS253DM54LS253DM74LS253
TRI-STATE
Data SelectorsMultiplexers
General Description
Each of these Schottky-clamped data selectorsmultiplex-
ers contains inverters and drivers to supply fully comple-
mentary on-chip binary decoding data selection to the
AND-OR gates Separate output control inputs are provided
for each of the two four-line sections
The TRI-STATE outputs can interface directly with data
lines of bus-organized systems With all but one of the com-
mon outputs disabled (at a high impedance state) the low
impedance of the single enabled output will drive the bus
line to a high or low logic level
Features
Y
TRI-STATE version of LS153 with same pinout
Y
Schottky-diode-clamped transistors
Y
Permit multiplexing from N-lines to one line
Y
Performs parallel-to-serial conversion
Y
Strobeoutput control
Y
High fanout totem-pole outputs
Y
Typical propagation delay
Data to output
12 ns
Select to output
21 ns
Y
Typical power dissipation 35 mW
Y
Alternate MilitaryAerospace device (54LS253) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
TLF6416 – 1
Order Number 54LS253DMQB 54LS253FMQB
54LS253LMQB DM54LS253J DM54LS253W
DM74LS253M or DM74LS253N
See NS Package Number E20A J16A
M16A N16E or W16A
Function Table
Select
Data Inputs
Output
Output
Inputs
Control
B
A
C0
C1
C2
C3
G
Y
XX
XX
X
X
H
Z
LL
L
X
X
X
L
L
LL
H
X
X
X
L
H
LH
X
L
X
X
L
L
LH
X
H
X
X
L
H
HL
XX
L
X
L
L
HL
XX
H
X
L
H
HH
X
X
X
L
L
L
HH
X
X
X
H
L
H
Address Inputs A and B are common to both sections
H e High Level L e Low Level X e Don’t Care Z e High Impedance (off)
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


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