54F 74F257A Quad 2-Input Multiplexer with TRI-STATE Outputs
November 1994
54F 74F257A
Quad 2-Input Multiplexer with TRI-STATE Outputs
General Description
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
Features
Y
Y
Y
Y
Multiplexer expansion by tying outputs together
Non-inverting TRI-STATE outputs
Input clamp diodes limit high-speed termination effects
Guaranteed 4000V minimum ESD protection
Commercial
74F257APC
Military
Package
Number
N16E
Package Description
16-Lead (0 300 Wide) Molded Dual-In-Line
16-Lead Ceramic Dual-In-Line
16-Lead (0 150 Wide) Molded Small Outline JEDEC
16-Lead (0 300 Wide) Molded Small Outline EIAJ
16-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier Type C
54F257ADM (Note 2)
74F257ASC (Note 1)
74F257ASJ (Note 1)
54F257AFM (Note 2)
54F257ALL (Note 2)
J16A
M16A
M16D
W16A
E20A
Note 1
Devices also available in 13 reel Use suffix
e
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-STATE is a registered trademark of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL F 9507
RRD-B30M75 Printed in U S A
ROCHESTER [ Rochester Electronics ]
