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DS3678 Datasheet

  • DS3678

  • TRI-STATE TTL to MOS Multiplexers/Drivers

  • 7頁

  • NSC

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DS1648 DS3648 DS1678 DS3678 TRI-STATE TTL to MOS Multiplexers Drivers
February 1986
DS1648 DS3648 DS1678 DS3678 TRI-STATE TTL to
MOS Multiplexers Drivers
General Description
The DS1648 DS3648 and DS1678 DS3678 are quad 2-in-
put multiplexers with TRI-STATE outputs designed to drive
the large capacitive loads (up to 500 pF) associated with
MOS memory systems A PNP input structure is employed
to minimize input currents so that driver loading in large
memory systems is reduced The circuit employs Schottky-
clamped transistors for high speed and TRI-STATE outputs
for bus operation
The DS1648 DS3648 has a 15X resistor in series with the
outputs to dampen transients caused by the fast-switching
output The DS1678 DS3678 has a direct low impedance
output for use with or without an external resistor
Features
Y
Y
Y
Y
Y
Y
TRI-STATE outputs interface directly with system-bus
Schottky-clamped for better ac performance
PNP inputs to minimize input loading
TTL compatible
High-speed capacitive load drivers
Built-in damping resistor (DS1648 DS3648 only)
Logic and Connection Diagrams
Dual-In-Line Package
TL F 7506 鈥?2
Top View
TL F 7506 鈥?1
Order Number DS1648J DS3648J DS1678J
DS3678J DS3648N or DS3678N
See NS Package Number J16A or N16A
TRI-STATE is a registered trademark of National Semiconductor Corp
C
1995 National Semiconductor Corporation
TL F 7506
RRD-B30M105 Printed in U S A

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