November 1994
54F/74F257A
Quad 2-Input Multiplexer with TRI-STATE Outputs
É
General Description
Features
Y
Multiplexer expansion by tying outputs together
The ’F257A is a quad 2-input multiplexer with TRI-STATE
outputs. Four bits of data from two sources can be selected
using a Common Data Select input. The four outputs pres-
ent the selected data in true (non-inverted) form. The out-
puts may be switched to a high impedance state with a
HIGH on the common Output Enable (OE) input, allowing
the outputs to interface directly with bus-oriented systems.
Y
Non-inverting TRI-STATE outputs
Y
Input clamp diodes limit high-speed termination effects
Y
Guaranteed 4000V minimum ESD protection
Package
Number
Commercial
74F257APC
Military
Package Description
N16E
J16A
16-Lead (0.300 Wide) Molded Dual-In-Line
×
54F257ADM (Note 2)
16-Lead Ceramic Dual-In-Line
74F257ASC (Note 1)
74F257ASJ (Note 1)
M16A
M16D
W16A
E20A
16-Lead (0.150 Wide) Molded Small Outline, JEDEC
×
16-Lead (0.300 Wide) Molded Small Outline, EIAJ
×
54F257AFM (Note 2)
54F257ALL (Note 2)
16-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier, Type C
e
Note 1: Devices also available in 13 reel. Use suffix
SCX and SJX.
×
Note 2: Military grade device with environmental and burn-in processing. Use suffix
e
DMQB, FMQB and LMQB.
Logic Symbols
Connection Diagrams
Pin Assignment
for DIP, SOIC and Flatpak
Pin Assignment
for LCC
TL/F/9507–3
IEEE/IEC
TL/F/9507–1
TL/F/9507–2
TL/F/9507–5
TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
TL/F/9507
RRD-B30M75/Printed in U. S. A.