NSC 54ACQ240LMQB, 54ACQ240DMQB Datasheet

54ACQ240•54ACTQ240
Quiet Series Octal Buffer/Line Driver with TRI-STATE

®

Outputs

General Description

The ’ACQ/’ACTQ240 is an inverting octal buffer and line
driver designed to be employed as a memory address driver,
clock driver and bus oriented transmitter or receiver which
provides improved PC board density. The ’ACQ/’ACTQ uti­lizes NSC Quiet Series technology to guaranteequiet output
switching and improve dynamic threshold performance.
FACT Quiet Series

™

features GTO™output control and un­dershoot corrector in addition to a split ground bus for supe­rior performance.

Features

n ICCand IOZreduced by 50

%

n Guaranteed simultaneous switching noise level and

dynamic threshold performance

n Improved latch-up immunity
n Inverting TRI-STATE outputs drive bus lines or buffer

memory address registers

n Outputs source/sink 24 mA
n Faster prop delays than the standard ’ACT240
n 4 kV minimum ESD immunity
n Standard Microcircuit Drawing (SMD)

’ACTQ240: 5962-92184

Logic Symbol

Pin Names Description

OE

1

,OE

2

TRI-STATE Output Enable Inputs

I

0–I7

Inputs

O

0–O7

Outputs

Connection Diagrams

GTO™is a trademark of National Semiconductor Corporation.
TRI-STATE

®

is a registered trademark of National Semiconductor Corporation.

FACT

®

is a registered trademark of Fairchild Semiconductor Corporation.

FACT Quiet Series

™

is a trademark of Fairchild Semiconductor Corporation.

IEEE/IEC

DS100235-1

Pin Assignment

for DIP and Flatpak

DS100235-2

Pin Assignment

for LCC

DS100235-3

February 1999

54ACQ240

•

54ACTQ240 Quiet Series Octal Buffer/Line Driver with TRI-STATE Outputs

© 1999 National Semiconductor Corporation DS100235 www.national.com

Truth Tables

Inputs Outputs

OE

1

I

n

(Pins 12, 14, 16, 18)

LL H
LH L

HX Z

Inputs Outputs

OE

2

I

n

(Pins 3, 5, 7, 9)

LL H
LH L
HX Z

H

=

HIGH Voltage Level
L=LOW Voltage Level
X=Immaterial
Z=High Impedance

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Supply Voltage (V

CC

) −0.5V to +7.0V

DC Input Diode Current (I

IK

)

V

I

=

−0.5V −20 mA

V

I

=

V

CC

+ 0.5V +20 mA

DC Input Voltage (V

I

) −0.5V to VCC+ 0.5V

DC Output Diode Current (I

OK

)

V

O

=

−0.5V −20 mA

V

O

=

V

CC

+ 0.5V +20 mA

DC Output Voltage (V

O

) −0.5V to VCC+ 0.5V

DC Output Source

or Sink Current (I

O

)

±

50 mA

DC V

CC

or Ground Current

per Output Pin (I

CC

or I

GND

)

±

50 mA

Storage Temperature (T

STG

) −65˚C to +150˚C

DC Latch-Up Source or

Sink Current

±

300 mA

Junction Temperature (T

J

)

CDIP 175˚C

Recommended Operating
Conditions

Supply Voltage (VCC)

’ACQ 2.0V to 6.0V
’ACTQ 4.5V to 5.5V

Input Voltage (V

I

) 0VtoV

CC

Output Voltage (VO) 0VtoV

CC

Operating Temperature (TA)

54ACQ/ACTQ −55˚C to +125˚C

Minimum Input Edge Rate ∆V/∆t

’ACQ Devices
V

IN

from 30%to 70%of V

CC

V

CC

@

3.0V, 4.5V, 5.5V 125 mV/ns

Minimum Input Edge Rate ∆V/∆t

’ACTQ Devices
V

IN

from 0.8V to 2.0V

V

CC

@

4.5V, 5.5V 125 mV/ns

Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without
exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. National does not recom­mend operation of FACT

®

circuits outside databook specifications.

Note 2: All commercial packaging is not recommended for applications re­quiring greater than 2000 temperature cycles from −40˚C to +125˚C.

DC Characteristics for ’ACQ Family Devices

54ACQ

Symbol Parameter V

CC

T

A

=

Units Conditions

(V) −55˚C to +125˚C

Guaranteed Limits

V

IH

Minimum High Level 3.0 2.1 V

OUT

=

0.1V

Input Voltage 4.5 3.15 V or V

CC

− 0.1V

5.5 3.85

V

IL

Maximum Low Level 3.0 0.9 V

OUT

=

0.1V

Input Voltage 4.5 1.35 V or V

CC

− 0.1V

5.5 1.65

V

OH

Minimum High Level 3.0 2.9 I

OUT

=

−50 µA

Output Voltage 4.5 4.4 V

5.5 5.4
(Note 3)

V

IN

=

V

IL

or V

IH

3.0 2.4 IOH= −12 mA

4.5 3.7 V I

OH

= −24 mA

5.5 4.7 I

OH

= −24 mA

V

OL

Maximum Low Level 3.0 0.1 I

OUT

=

50 µA

Output Voltage 4.5 0.1 V

5.5 0.1
(Note 3)

V

IN

=

V

IL

or V

IH

3.0 0.50 IOL=12mA

4.5 0.50 V I

OL

=24mA

5.5 0.50 I

OL

=24mA

I

IN

Maximum Input 5.5

±

1.0 µA V

I

=

V

CC

, GND

Leakage Current (Note 5)

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