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PDF DS3649 Data sheet ( Hoja de datos )

Número de pieza DS3649
Descripción Hex TRI-STATE TTLto MOS Drivers
Fabricantes National Semiconductor 
Logotipo National Semiconductor Logotipo



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No Preview Available ! DS3649 Hoja de datos, Descripción, Manual

March 1986
DS1649 DS3649 DS1679 DS3679 Hex TRI-STATE TTL
to MOS Drivers
General Description
The DS1649 DS3649 and DS1679 DS3679 are Hex
TRI-STATE MOS drivers with outputs designed to drive
large capacitive loads up to 500 pF associated with MOS
memory systems PNP input transistors are employed to re-
duce input currents allowing the large fan-out to these driv-
ers needed in memory systems The circuit has Schottky-
clamped transistor logic for minimum propagation delay
and TRI-STATE outputs for bus operation
The DS1649 DS3649 has a 15X resistor in series with the
outputs to dampen transients caused by the fast-switching
TRI-STATE is a registered trademark of National Semiconductor Corp
output The DS1679 DS3679 has a direct low impedance
output for use with or without an external resistor
Features
Y High speed capabilities
 Typ 9 ns driving 50 pF
 Typ 30 ns driving 500 pF
Y TRI-STATE outputs for data bussing
Y Built-in 15X damping resistor (DS1649 DS3649)
Y Same pin-out as DM8096 and DM74366
Schematic Diagram
Truth Table
Disable Input
Input Output
DIS 1 DIS 2
0
00
1
0
01
0
0 1 X Hi-Z
1 0 X Hi-Z
1 1 X Hi-Z
X e Don’t care
Hi-Z e TRI-STATE mode
DS1649 DS3649 only
Connection Diagram
Dual-In-Line Package
TL F 7515 – 1
Typical Application
Top View
TL F 7515 – 2
Order Number DS1649J DS3649J
DS1679J DS3679J DS3649N or DS3679N
See NS Package Number J16A or N16A
C1995 National Semiconductor Corporation TL F 7515
TL F 7515 – 3
RRD-B30M105 Printed in U S A

1 page




DS3649 pdf
Physical Dimensions inches (millimeters)
Ceramic Dual-In-Line Package (J)
Order Number DS1649J DS3649J
DS1679J or DS3679J
NS Package Number J16A
5

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