Datasheet 5962R8776001SSA, 5962R8776001SRA, 5962R8776001BSA, 5962R8776001BRA, 5962R8776001B2A Datasheet (NSC)

54AC244•54ACT244
Octal Buffer/Line Driver with TRI-STATE

®

Outputs

General Description

The ’AC/’ACT244 is an octal buffer and line driver designed
to beemployed as a memory address driver, clockdriver and
bus-oriented transmitter/receiver which provides improved
PC board density.

Features

n ICCand IOZreduced by 50

%

n TRI-STATE outputs drive bus lines or buffer memory

address registers

n Outputs source/sink 24 mA
n ’ACT244 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)

— ’AC244: 5962-87552
— ’ACT244: 5962-87760

Logic Symbol

Pin Names Description

OE

1

,OE2TRI-STATE Output Enable Inputs

I

0–I7

Inputs

O

0–O7

Outputs

TRI-STATE®is a registered trademark of National Semiconductor Corporation.
FACT

®

is a registered trademark of Fairchild Semiconductor Corporation.

IEEE/IEC

DS100282-1

August 1998

54AC244

•

54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs

© 1998 National Semiconductor Corporation DS100282 www.national.com

Connection Diagrams Truth Tables

Inputs Outputs

OE

1In

(Pins 12, 14, 16, 18)

LL L
LH H

HX Z

H=HIGH Voltage Level
L=LOW Voltage Level

Inputs Outputs

OE

2In

(Pins 3, 5, 7, 9)

LL L
LH H

HX Z

X=Immaterial
Z=High Impedance

Pin Assignment for DIP

and Flatpak

DS100282-2

Pin Assignment for LCC

DS100282-3

www.national.com 2

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the NationalSemiconductor 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

Junction Temperature (T

J

)

CDIP 175˚C

Recommended Operating
Conditions

Supply Voltage (VCC)

’AC 2.0V to 6.0V
’ACT 4.5V to 5.5V

Input Voltage (V

I

) 0VtoV

CC

Output Voltage (VO) 0VtoV

CC

Operating Temperature (TA)

54AC/ACT −55˚C to +125˚C

Minimum Input Edge Rate (∆V/∆t)

’AC Devices
V

IN

from 30%to 70%of V

CC

V

CC

@

3.3V, 4.5V, 5.5V 125 mV/ns

Minimum Input Edge Rate (∆V/∆t)

’ACT 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.

DC Characteristics for ’AC Family Devices

54AC

Symbol Parameter V

CC

T

A

=

Units Conditions

(V) −55˚C to +125˚C

Guaranteed Limits

V

IH

Minimum High 3.0 2.1 V

OUT

=

0.1V

Level Input 4.5 3.15 V or V

CC

− 0.1V

Voltage 5.5 3.85

V

IL

Maximum Low 3.0 0.9 V

OUT

=

0.1V

Level Input 4.5 1.35 V or V

CC

− 0.1V

Voltage 5.5 1.65

V

OH

Minimum High 3.0 2.9 I

OUT

=

−50 µA
Level Output 4.5 4.4 V
Voltage 5.5 5.4

(Note 2)
V

IN

=

V

IL

or V

IH

3.0 2.4 −12 mA

4.5 3.7 V I

OH

−24 mA

5.5 4.7 −24 mA

V

OL

Maximum Low 3.0 0.1 I

OUT

=

50 µA
Level Output 4.5 0.1 V
Voltage 5.5 0.1

(Note 2)
V

IN

=

V

IL

or V

IH

3.0 0.50 12 mA

4.5 0.50 V I

OL

24 mA

5.5 0.50 24 mA

I

IN

Maximum Input 5.5

±

1.0 µA V

I

=

V

CC

, GND

Leakage Current

3 www.national.com

DC Characteristics for ’AC Family Devices (Continued)

54AC

Symbol Parameter V

CC

T

A

=

Units Conditions

(V) −55˚C to +125˚C

Guaranteed Limits

I

OZ

Maximum VI(OE)=VIL,V

IH

TRI-STATE 5.5

±

5.0 µA V

I

=

V

CC,VGND

Current V

O

=

V

CC

, GND

I

OLD

(Note 3) Minimum
Dynamic Output
Current

5.5 50 mA V

OLD

=

1.65V Max

I

OHD

5.5 −50 mA V

OHD

=

3.85V Min

I

CC

Maximum Quiescent 5.5 80.0 µA V

IN

=

V

CC

Supply Current or GND

Note 2: All outputs loaded; thresholds on input associated with output under test.
Note 3: Maximum test duration 2.0 ms, one output loaded at a time.
Note 4: I

IN

and I

CC

@

3.0V are guaranteed to be less than or equal to the respective limit@5.5V VCC.

Note 5: I

CC

for 54AC@25˚C is identical to 74AC@25˚C.

DC Characteristics for ’ACT Family Devices

54ACT

Symbol Parameter V

CC

T

A

=

Units Conditions

(V) −55˚C to +125˚C

Guaranteed Limits

V

IH

Minimum High Level 4.5 2.0 V V

OUT

=

0.1V

Input Voltage 5.5 2.0 or V

CC

− 0.1V

V

IL

Maximum Low Level 4.5 0.8 V V

OUT

=

0.1V

Input Voltage 5.5 0.8 or V

CC

− 0.1V

V

OH

Minimum High Level 4.5 4.4 V I

OUT

=

−50 µA

Output Voltage 5.5 5.4

(Note 6)
V

IN

=

V

IL

or V

IH

4.5 3.70 V I

OH

−24 mA

5.5 4.70 −24 mA

V

OL

Maximum Low Level 4.5 0.1 V I

OUT

=

50 µA

Output Voltage 5.5 0.1

(Note 6)
V

IN

=

V

IL

or V

IH

4.5 0.50 V I

OL

24 mA

5.5 0.50 24 mA

I

IN

Maximum Input Leakage Current 5.5

±

1.0 µA V

I

=

V

CC

, GND

I

OZ

Maximum TRI-STATE 5.5

±

5.0 µA V

I

=

V

IL,VIH

Current V

O

=

V

CC

, GND

I

CCT

Maximum ICC/Input 5.5 1.6 mA V

I

=

V

CC

− 2.1V

I

OLD

(Note 7) Minimum
Dynamic Output
Current

5.5 50 mA V

OLD

=

1.65V Max

I

OHD

5.5 −50 mA V

OHD

=

3.85V Min

I

CC

Maximum Quiescent 5.5 80.0 µA V

IN

=

V

CC

Supply Current or GND

Note 6: All outputs loaded; thresholds on input associated with output under test.
Note 7: Maximum test duration 2.0 ms, one output loaded at a time.
Note 8: I

CC

for 54ACT@25˚C is identical to 74ACT@25˚C.

www.national.com 4

AC Electrical Characteristics

54AC

V

CC

T

A

=

−55˚C

Symbol Parameter (V) to +125˚C Units

(Note 9) C

L

=

50 pF

Min Max

t

PLH

Propagation Delay 3.3 1.0 12.5 ns
Data to Output 5.0 1.0 9.5

t

PHL

Propagation Delay 3.3 1.0 12.0 ns
Data to Output 5.0 1.0 9.0

t

PZH

Output Enable Time 3.3 1.0 11.5 ns

5.0 1.0 9.0

t

PZL

Output Enable Time 3.3 1.0 13.0 ns

5.0 1.0 10.5

t

PHZ

Output Disable Time 3.3 1.0 12.5 ns

5.0 1.0 10.5

t

PLZ

Output Disable Time 3.3 1.0 13.0 ns

5.0 1.0 11.0

Note 9: Voltage Range 3.3 is 3.3V±0.3V

Voltage Range 5.0 is 5.0V

±

0.5V

AC Electrical Characteristics

54ACT

V

CC

T

A

=

−55˚C

Symbol Parameter (V) to +125˚C Units

(Note 10) C

L

=

50 pF

Min Max

t

PLH

Propagation Delay 5.0 1.0 10.0 ns
Data to Output

t

PHL

Propagation Delay 5.0 1.0 10.0 ns
Data to Output

t

PZH

Output Enable Time 5.0 1.0 9.5 ns

t

PZL

Output Enable Time 5.0 1.0 11.0 ns

t

PHZ

Output Disable Time 5.0 1.0 11.0 ns

t

PLZ

Output Disable Time 5.0 1.0 11.5 ns

Note 10: Voltage Range 5.0 is 5.0V±0.5V

Capacitance

Symbol Parameter Typ Units Conditions

C

IN

Input Capacitance 4.5 pF V

CC

=

OPEN

C

PD

Power Dissipation 45.0 pF V

CC

=

5.0V

Capacitance

5 www.national.com

6

Physical Dimensions inches (millimeters) unless otherwise noted

20-Terminal Ceramic Leadless Chip Carrier (L)

NS Package Number E20A

20-Lead Ceramic Dual-In-Line Package (D)

NS Package Number J20A

7 www.national.com

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

LIFE SUPPORT POLICY

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 sustainlife, and whose fail­ure to perform when properly used in accordance
with instructions for use provided in the labeling, can
be reasonablyexpected to result in asignificant injury
to the user.

2. A critical component in any component of a life support
device or system whose failure to perform can be rea­sonably expectedto cause the failure of the life support
device orsystem, or to affect itssafety or effectiveness.

National Semiconductor
Corporation

Americas
Tel: [phone]
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20-Lead Ceramic Flatpak (F)

NS Package Number W20A

54AC244

•

54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.