Datasheet 5962R8766301SSA, 5962R8766301SRA, 5962R8766301S2A, 5962R8766301BSA, 5962R8766301BRA Datasheet (NSC)

54AC245•54ACT245
Octal Bidirectional Transceiver with TRI-STATE

®

Inputs/Outputs

General Description

The ’AC/’ACT245 contains eight non-inverting bidirectional
buffers with TRI-STATE outputs and is intended for
bus-oriented applications. Current sinking capability is
24 mA at both theAand B ports. The Transmit/Receive (T/R)
input determines the direction of data flow through the bidi­rectional transceiver. Transmit (active-HIGH) enables data
from A ports to B ports; Receive (active-LOW) enables data
from B ports to A ports. The Output Enable input, when
HIGH, disables both Aand B ports by placing them in a HIGH
Z condition.

Features

n ICCand IOZreduced by 50

%

n Noninverting buffers
n Bidirectional data path
n A and B outputs source/sink 24 mA
n ’ACT245 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)

— ’AC245: 5962-87758
— ’ACT245: 5962-87663

Logic Symbols

Pin Description

Names

OE

Output Enable Input

T/R

Transmit/Receive Input

A

0–A7

Side A TRI-STATE Inputs or TRI-STATE Outputs

B

0–B7

Side B TRI-STATE Inputs or TRI-STATE Outputs

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

®

is a registered trademark of Fairchild Semiconductor Corporation.

DS100283-1

IEEE/IEC

DS100283-2

August 1998

54AC245

•

54ACT245 Octal Bidirectional Transceiver with TRI-STATE Inputs/Outputs

© 1998 National Semiconductor Corporation DS100283 www.national.com

Connection Diagrams

Truth Table

Inputs Outputs

OE

T/R

L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X HIGH-Z State

H=HIGH Voltage Level
L=LOW Voltage Level
X=Immaterial

Pin Assignment for

DIP and Flatpak

DS100283-3

Pin Assignment for LCC

DS100283-4

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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

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

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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

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

I

OZT

Maximum I/O VI(OE)=VIL,V

IH

Leakage Current 5.5

±

5.5 µA V

I

=

V

CC

, GND

V

O

=

V

CC

, 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.

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 5)
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 5)
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

CCT

Maximum 5.5 1.6 mA V

I

=

V

CC

− 2.1V

I

CC

/Input

I

OLD

(Note 6) 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

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DC Characteristics for ’ACT Family Devices (Continued)

54ACT

Symbol Parameter V

CC

T

A

=

Units Conditions

(V) −55˚C to +125˚C

Guaranteed

Limits

I

OZT

Maximum I/O VI(OE)=VIL,V

IH

Leakage Current 5.5

±

5.0 µA V

I

=

V

CC

, GND

V

O

=

V

CC

, GND

Note 5: All outputs loaded; thresholds on input associated with output under test.
Note 6: Maximum test duration 2.0 ms, one output loaded at a time.
Note 7: I

CC

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

AC Electrical Characteristics

54AC

V

CC

T

A

=

−55˚C Fig.

Symbol Parameter (V) to +125˚C Units No.

(Note 8) C

L

=

50 pF

Min Max

t

PLH

Propagation Delay 3.3 1.0 11.5 ns
A

n

to Bnor Bnto A

n

5.0 1.0 8.5

t

PHL

Propagation Delay 3.3 1.0 10.0 ns
A

n

to Bnor Bnto A

n

5.0 1.0 7.5

t

PZH

Output Enable Time 3.3 1.0 13.5 ns

5.0 1.0 10.0

t

PZL

Output Enable Time 3.3 1.0 14.5 ns

5.0 1.0 10.5

t

PHZ

Output Disable Time 3.3 1.0 13.5 ns

5.0 1.0 10.5

t

PLZ

Output Disable Time 3.3 1.0 14.0 ns

5.0 1.0 10.5

Note 8: 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 9) C

L

=

50 pF

Min Max

t

PLH

Propagation Delay 5.0 1.0 9.0 ns
A

n

to Bnor Bnto A

n

t

PHL

Propagation Delay 5.0 1.0 10.0 ns
A

n

to Bnor Bnto A

n

t

PZH

Output Enable Time 5.0 1.0 12.0 ns

t

PZL

Output Enable Time 5.0 1.0 13.0 ns

t

PHZ

Output Disable Time 5.0 1.0 12.0 ns

t

PLZ

Output Disable Time 5.0 1.0 12.0 ns

Note 9: Voltage Range 5.0 is 5.0V±0.5V

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Capacitance

Symbol Parameter Typ Units Conditions

C

IN

Input Capacitance 4.5 pF V

CC

=

OPEN

C

I/O

Input/Output 15.0 pF V

CC

=

5.0V

Capacitance

C

PD

Power Dissipation 45.0 pF V

CC

=

5.0V

Capacitance

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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

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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 sustain life, and whose fail­ure to perform when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant 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 expected to cause the failureof thelife support
device or system, or to affect its safety or effectiveness.

National Semiconductor
Corporation

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20-Lead Ceramic Flatpak (F)

NS Package Number W20A

54AC245

•

54ACT245 Octal Bidirectional Transceiver with TRI-STATE Inputs/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.