Datasheet 5962R8769201VFA, 5962R8769201VEA, 5962R8769201V2A, 5962-8769201FA, 5962-8769201EA Datasheet (NSC)

54AC251•54ACT251
8-Input Multiplexer with TRI-STATE

®

Output

General Description

The ’AC/’ACT251 is a high-speed 8-input digital multiplexer.
It provides, in one package, the ability to select one bit of
data from up to eight sources. It can be used as universal
function generator togenerate any logic function of four vari­ables. Both true and complementary outputs are provided.

Features

n ICCreduced by 50

%

n Multifunctional capability
n On-chip select logic decoding
n Inverting and noninverting TRI-STATE outputs
n Outputs source/sink 24 mA
n ’ACT251 has TTL-compatible inputs
n Standard Military Drawing (SMD)

—’AC251: 5962-87692
—’ACT251: 5962-89599

Logic Symbols

Pin Names Description

S

0–S2

Select Inputs

OE

TRI-STATE Output Enable Input

I

0–I7

Multiplexer Inputs
Z TRI-STATE Multiplexer Output
Z

Complementary TRI-STATE Multiplexer

Output

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

®

is a registered trademark of Fairchild Semiconductor Corporation.

DS100284-1

IEEE/IEC

DS100284-2

August 1998

54AC251

•

54ACT251 8-Input Multiplexer with TRI-STATE Output

© 1998 National Semiconductor Corporation DS100284 www.national.com

Connection Diagrams Functional Description

This device is a logical implementation of a single-pole,
8-position switch with the switch position controlled by the
state of three Select inputs, S

0,S1,S2

. Both true and
complementary outputs are provided. The Output Enable in­put ( OE) is active LOW. When it is activated, the logic func­tion provided at the output is:

Z=OE

•

(I

0

•

S

0

•

S

1

•

S2+I

1

•

S

0

•

S

1

•

S2+

I

2

•

S

0

•

S

1

•

S2+I

3

•

S

0

•

S

1

•

S2+

I

4

•

S

0

•

S

1

•

S2+I

5

•

S

0

•

S

1

•

S2+

I

6

•

S

0

•

S

1

•

S2+I

7

•

S

0

•

S

1

•

S2)

When the Output Enable is HIGH, both outputs are in the
high impedance (High Z) state. This feature allows multi­plexer expansion by tying the outputs of up to 128 devices
together. When the outputs of the TRI-STATE devices are
tied together, all but one device must be in the high imped­ance state to avoid high currents that would exceed the
maximum ratings. The Output Enable signals should be de­signed to ensure there is no overlap in the active-LOW por­tion of the enable voltages.

Truth Table

Inputs Outputs

OE

S

2

S

1

S

0

Z Z

HXXXZZ
LLLLI

0

I

0

LLLHI1I

1

LLHLI2I

2

LLHHI3I

3

LHLLI4I

4

LHLHI5I

5

LHHLI6I

6

LHHHI7I

7

H

=

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

Pin Assignment

for DIP and Flatpak

DS100284-3

Pin Assignment

for LCC

DS100284-4

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Logic Diagram

DS100284-5

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

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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.

Note 2: All outputs loaded; thresholds on input associated with output under
test.

DC Characteristics for ’AC Family Devices

54AC

Symbol Parameter V

CC

T

A

=

−55˚C to +125˚C Units Conditions

(V) 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 2)
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 2)
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

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DC Characteristics for ’AC Family Devices (Continued)

54AC

Symbol Parameter V

CC

T

A

=

−55˚C to +125˚C Units Conditions

(V) Guaranteed Limits

I

OZ

Maximum TRI-STATE VI(OE)=VIL,V

IH

Current 5.5

±

5.0 µA V

I

=

V

CC,VGND

V

O

=

V

CC

, GND

I

OLD

Minimum Dynamic 5.5 50 mA V

OLD

=

1.65V Max

I

OHD

Output Current (Note 3) 5.5 −50 mA V

OHD

=

3.85V Min

I

CC

Maximum Quiescent 5.5 80.0 µA V

IN

=

V

CC

or GND

Supply Current

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

=

−55˚C to +125˚C Units Conditions

(V) 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 IOH= −24 mA

5.5 4.70 I

OH

= −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 IOL=24mA

5.5 0.50 I

OL

=24mA

I

IN

Maximum Input 5.5

±

1.0 µA V

I

=

V

CC

, GND

Leakage Current

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

Minimum Dynamic 5.5 50 mA V

OLD

=

1.65V Max

I

OHD

Output Current (Note 6) 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 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.

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AC Electrical Characteristics

54AC

V

CC

T

A

=

−55˚C

Symbol Parameter (V) to +125˚C Units

(Note 8) C

L

=

50 pF

Min Max

t

PLH

Propagation Delay 3.3 1.0 21.0 ns
S

n

toZorZ 5.0 1.0 15.5

t

PHL

Propagation Delay 3.3 1.0 21.0 ns
S

n

toZorZ 5.0 1.0 15.5

t

PLH

Propagation Delay 3.3 1.0 17.0 ns
I

n

toZorZ 5.0 1.0 12.0

t

PHL

Propagation Delay 3.3 1.0 16.5 ns
I

n

toZorZ 5.0 1.0 12.0

t

PZH

Output Enable Time 3.3 1.0 13.0 ns
OEtoZorZ

5.0 1.0 10.0

t

PZL

Output Enable Time 3.3 1.0 13.0 ns
OEtoZorZ

5.0 1.0 10.0

t

PHZ

Output Disable Time 3.3 3.5 14.0 ns
OEtoZorZ

5.0 2.5 11.0

t

PLZ

Output Disable Time 3.3 4.0 13.0 ns
OEtoZorZ

5.0 3.0 10.0

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 18.0 ns
S

n

toZorZ

t

PHL

Propagation Delay 5.0 1.0 18.0 ns
S

n

toZorZ

t

PLH

Propagation Delay 5.0 1.0 13.5 ns
I

n

toZorZ

t

PHL

Propagation Delay 5.0 1.0 13.5 ns
I

n

toZorZ

t

PZH

Output Enable Time 5.0 1.0 10.0 ns
OEtoZorZ

t

PZL

Output Enable Time 5.0 1.0 9.5 ns
OEtoZorZ

t

PHZ

Output Disable Time 5.0 1.0 12.5 ns
OEtoZorZ

t

PLZ

Output Disable Time 5.0 1.0 8.5 ns
OEtoZorZ

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

PD

Power Dissipation 70.0 pF V

CC

=

5.0V

Capacitance

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8

Physical Dimensions inches (millimeters) unless otherwise noted

20 Terminal Ceramic Leadless Chip Carrier (L)

NS Package Number E20A

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

NS Package Number J16A

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

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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 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 expected to cause the failure of the life support
device or system, or to affect itssafety or effectiveness.

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Corporation

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Tel: [phone]
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16 Lead Ceramic Flatpak (F)

NS Package Number W16A

54AC251

•

54ACT251 8-Input Multiplexer with TRI-STATE Output

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.