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PDF DM74LS253 Data sheet ( Hoja de datos )
| Número de pieza | DM74LS253 | |
| Descripción | TRI-STATE Data Selectors/Multiplexers | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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June 1989
54LS253 DM54LS253 DM74LS253
TRI-STATE Data Selectors Multiplexers
General Description
Each of these Schottky-clamped data selectors multiplex-
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 Strobe output 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 Military Aerospace device (54LS253) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
Function Table
Select
Inputs
Data Inputs
Output Output
Control
B A C0 C1 C2 C3
G
Y
XXXXXX
LL LXXX
L LHXXX
LHXL X X
LH XH X X
HL XX L X
HL XXHX
HHXX X L
HHXX XH
H
L
L
L
L
L
L
L
L
Z
L
H
L
H
L
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)
TL F 6416 – 1
Order Number 54LS253DMQB 54LS253FMQB
54LS253LMQB DM54LS253J DM54LS253W
DM74LS253M or DM74LS253N
See NS Package Number E20A J16A
M16A N16E or W16A
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 6416
RRD-B30M105 Printed in U S A
1 page  
Physical Dimensions inches (millimeters) (Continued)
16-Lead Small Outline Molded Package (M)
Order Number DM74LS253M
NS Package Number M16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74LS253N
NS Package Number N16E
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet DM74LS253.PDF ] | |
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