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DS75325 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. DS75325
Description  Memory Drivers
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

DS75325 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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TLF9755
June 1992
DS75325
Memory Drivers
General Description
The DS75325 is a monolithic memory driver which features
high current outputs as well as internal decoding of logic
inputs This circuit is designed for use with magnetic memo-
ries
The circuit contains two 600 mA sink-switch pairs and two
600 mA source-switch pairs Inputs A and B determine
source selection while the source strobe (S1) allows the
selected source turn on In the same manner inputs C and
D determine sink selection while the sink strobe (S2) allows
the selected sink turn on
Sink-output collectors feature an internal pull-up resistor in
parallel with a clamping diode connected to VCC2 This pro-
tects the outputs from voltage surges associated with
switching inductive loads
The source stage features Node R which allows extreme
flexibility in source current selection by controlling the
amount of base drive to each source transistor This method
of setting the base drive brings the power associated with
the resistor outside the package thereby allowing the circuit
to operate at higher source currents for a given junction
temperature If this method of source current setting is not
desired then Nodes R and RINT can be shorted externally
activating an internal resistor connected from VCC2 to Node
R This provides adequate base drive for source currents up
to 375 mA with VCC2 e 15V or 600 mA with VCC2 e 24V
Features
Y
600 mA output capability
Y
24V output capability
Y
Dual sink and dual source outputs
Y
Fast switching times
Y
Source base drive externally adjustable
Y
Input clamping diodes
Y
TTL compatible
Connection Diagram
Dual-In-Line Package
TLF9755 – 2
Top View
Order Number DS75325N
See NS Package Number N14A
Truth Table
Address Inputs
Strobe Inputs
Outputs
Source
Sink
Source
Sink
Source
Sink
A
B
C
D
S1
S2
W
X
Y
Z
L
H
X
X
L
H
ON
OFF OFF OFF
H
L
X
X
L
H
OFF ON
OFF OFF
X
X
L
H
H
L
OFF OFF ON
OFF
X
X
H
L
H
L
OFF OFF OFF ON
X
X
X
X
H
H
OFF OFF OFF OFF
H
H
H
H
X
X
OFF OFF OFF OFF
H e High Level L e Low Level X e Irrelevant
Note
Not more than one output is to be on at any one time
C1995 National Semiconductor Corporation
RRD-B30M115Printed in U S A


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