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參數資料
| 型號： | DS55325 |
| 文件頁數： | 1/14頁 |
| 文件大小： | 201K |
| 代理商： | DS55325 |
TL/F/9755
D
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 V
CC2
. 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 R
INT
can be shorted externally,
activating an internal resistor connected from V
CC2
to Node
R. This provides adequate base drive for source currents up
to 375 mA with V
CC2
e
15V or 600 mA with V
CC2
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
TL/F/9755–2
Top View
Order Number DS75325N
See NS Package Number N14A
Truth Table
Address Inputs
Strobe Inputs
Outputs
Source
A
Sink
C
Source
S1
Sink
S2
Source
W
Sink
Y
B
D
X
Z
L
H
X
X
X
H
H
L
X
X
X
H
X
X
L
H
X
H
X
X
H
L
X
H
L
L
H
H
H
X
H
H
L
L
H
X
ON
OFF ON
OFF OFF ON
OFF OFF OFF ON
OFF OFF OFF OFF
OFF OFF OFF OFF
OFF OFF 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.
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS55325J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Memory Driver |
| DS55325J/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Memory Driver |
| DS55451 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Peripheral Drivers |
| DS55451 WAF | 制造商:Texas Instruments 功能描述: |
| DS55451H | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Peripheral Drivers |
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