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DS3678 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer DS3678
Beschreibung TRI-STATE TTL to MOS Multiplexers/Drivers
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 7 Seiten
DS3678 Datasheet, Funktion
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 TRI-STATE outputs interface directly with system-bus
Y Schottky-clamped for better ac performance
Y PNP inputs to minimize input loading
Y TTL compatible
Y High-speed capacitive load drivers
Y Built-in damping resistor (DS1648 DS3648 only)
Logic and Connection Diagrams
Dual-In-Line Package
TL F 7506 – 1
Top View
TL F 7506 – 2
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
C1995 National Semiconductor Corporation TL F 7506
RRD-B30M105 Printed in U S A






DS3678 Datasheet, Funktion
Physical Dimensions inches (millimeters)
Ceramic Dual-in-Line Pkg (J)
Order Number DS1648J DS3648J DS1678J or DS3678J
See NS Package Number J16A
LIFE SUPPORT POLICY
Molded Dual-in-Line Pkg (N)
Order Number DS3648N or DS3678N
See NS Package Number N16A
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
systems which (a) are intended for surgical implant
into the body or (b) support or sustain life and whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling can
be reasonably expected to result in a significant injury
to the user
2 A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system or to affect its safety or
effectiveness
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