54AC157DMQB. - NATIONAL SEMICONDUCTOR

54AC157,54ACT157

54ACT157, 54AC157 Quad 2-Input Multiplexer

Literature Number: SNOS089A

54ACT157 • 54AC157

OBSOLETE

July 28, 2011

Quad 2-Input Multiplexer

General Description

The 'AC/'ACT157 is a high-speed quad 2-input multiplexer.

Four bits of data from two sources can be selected using the

common Select and Enable inputs. The four outputs present

the selected data in the true (noninverted) form. The

'AC/'ACT157 can also be used as a function generator.

Features

■ICC and IOZ reduced by 50%

■Outputs source/sink 24 mA

■'ACT157 has TTL-compatible inputs

■Standard Microcircuit Drawing (SMD)

—'AC157: 5962-89539

—'ACT157: 5962-89688

Logic Symbols

10027201

IEEE/IEC

10027202

Pin Names Description

I0a–I0d Source 0 Data Inputs

I1a–I1d Source 1 Data Inputs

E Enable Input

S Select Input

Za–ZdOutputs

FACT™ is a trademark of Fairchild Semiconductor

100272 Version 2 Revision 3 Print Date/Time: 2011/07/28 22:22:43

54ACT157 • 54AC157 Quad 2-Input Multiplexer

Connection Diagrams

Pin Assignment

for DIP and Flatpak

10027203

Pin Assignment

for LCC

10027204

Functional Description

The 'AC/'ACT157 is a quad 2-input multiplexer. It selects four

bits of data from two sources under the control of a common

Select input (S). The Enable input (E) is active-LOW. When

E is HIGH, all of the outputs (Z) are forced LOW regardless

of all other inputs. The 'AC/'ACT157 is the logic implementa-

tion of a 4-pole, 2-position switch where the position of the

switch is determined by the logic levels supplied to the Select

input. The logic equations for the outputs are shown below:

Za = E • (I1a • S + I0a • S)

Zb = E • (I1b • S + I0b • S)

Zc = E • (I1c • S + I0c • S)

Zd = E • (I1d • S + I0d • S)

A common use of the 'AC/ACT157 is the moving of data from

two groups of registers to four common output busses. The

particular register from which the data comes is determined

by the state of the Select input. A less obvious use is as a

function generator. The 'AC/'ACT157 can generate any four

of the sixteen different functions of two variables with one

variable common. This is useful for implementing gating func-

tions.

Truth Table

Inputs Outputs

E S I0I1Z

H X X X L

L H X L L

L H X H H

L L L X L

L L H X H

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

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100272 Version 2 Revision 3 Print Date/Time: 2011/07/28 22:22:43

54ACT157 • 54AC157

Logic Diagram

10027205

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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100272 Version 2 Revision 3 Print Date/Time: 2011/07/28 22:22:43

54ACT157 • 54AC157

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 (VCC)−0.5V to +7.0V

DC Input Diode Current (IIK)

VI = −0.5V −20 mA

VI = VCC + 0.5V +20 mA

DC Input Voltage (VI)−0.5V to VCC + 0.5V

DC Output Diode Current (IOK)

VO = −0.5V −20 mA

VO = VCC + 0.5V +20 mA

DC Output Voltage (VO)−0.5V to VCC + 0.5V

DC Output Source

or Sink Current (IO)±50 mA

DC VCC or Ground Current

per Output Pin (ICC or IGND)±50 mA

Storage Temperature (TSTG)−65°C to +150°C

Junction Temperature (TJ)

CDIP 175°C

Recommended Operating

Conditions

Supply Voltage (VCC)

'AC 2.0V to 6.0V

'ACT 4.5V to 5.5V

Input Voltage (VI) 0V to VCC

Output Voltage (VO) 0V to VCC

Operating Temperature (TA)

54AC/ACT −55°C to +125°C

Minimum Input Edge Rate (ΔV/Δt)

'AC Devices

VIN from 30% to 70% of VCC

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

Minimum Input Edge Rate (ΔV/Δt)

'ACT Devices

VIN from 0.8V to 2.0V

VCC @ 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 VCC TA = Units Conditions

(V) −55°C to +125°C

Guaranteed Limits

VIH Minimum High Level 3.0 2.1 VOUT = 0.1V

Input Voltage 4.5 3.15 V or VCC − 0.1V

5.5 3.85

VIL Maximum Low Level 3.0 0.9 VOUT = 0.1V

Input Voltage 4.5 1.35 V or VCC − 0.1V

5.5 1.65

VOH Minimum High Level 3.0 2.9 IOUT = −50 μA

Output Voltage 4.5 4.4 V

5.5 5.4

(Note 2)

VIN = VIL or VIH

3.0 2.4 IOH = −12 mA

4.5 3.7 V IOH = −24 mA

5.5 4.7 IOH = −24 mA

VOL Maximum Low Level 3.0 0.1 IOUT = 50 μA

Output Voltage 4.5 0.1 V

5.5 0.1

(Note 2)

VIN = VIL or VIH

3.0 0.50 IOL = 12 mA

4.5 0.50 V IOL = 24 mA

5.5 0.50 IOL = 24 mA

IIN Maximum Input 5.5 ±1.0 μAVI = VCC, GND

Leakage Current

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100272 Version 2 Revision 3 Print Date/Time: 2011/07/28 22:22:43

54ACT157 • 54AC157

54AC

Symbol Parameter VCC TA = Units Conditions

(V) −55°C to +125°C

Guaranteed Limits

IOLD Minimum Dynamic

Output Current (Note 3)

5.5 50 mA VOLD = 1.65V Max

IOHD 5.5 −50 mA VOHD = 3.85V Min

ICC Maximum Quiescent 5.5 80.0 μAVIN = VCC

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

ICC for 54AC @ 25°C is identical to 74AC @ 25°C.

DC Characteristics for 'ACT Family Devices

54ACT

Symbol Parameter VCC TA = Units Conditions

(V) −55°C to +125°C

Guaranteed Limits

VIH Minimum High Level 4.5 2.0 VVOUT = 0.1V

Input Voltage 5.5 2.0 or VCC − 0.1V

VIL Maximum Low Level 4.5 0.8 VVOUT = 0.1V

Input Voltage 5.5 0.8 or VCC − 0.1V

VOH Minimum High Level 4.5 4.4 VIOUT = −50 μA

Output Voltage 5.5 5.4

(Note 5)

VIN = VIL or VIH

4.5 3.70 VIOH = −24 mA

5.5 4.70 IOH = −24 mA

VOL Maximum Low Level 4.5 0.1 VIOUT = 50 μA

Output Voltage 5.5 0.1

(Note 5)

VIN = VIL or VIH

4.5 0.50 VIOL = 24 mA

5.5 0.50 IOL = 24 mA

IIN Maximum Input 5.5 ±1.0 μAVI = VCC, GND

Leakage Current

ICCT Maximum 5.5 1.6 mA VI = VCC − 2.1V

ICC/Input

IOLD Minimum Dynamic 5.5 50 mA VOLD = 1.65V Max

IOHD Output Current (Note 6)5.5 −50 mA VOHD = 3.85V Min

ICC Maximum Quiescent 5.5 80.0 μAVIN = VCC

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: ICC for 54ACT @ 25°C is identical to 74ACT @ 25°C.

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54ACT157 • 54AC157

AC Electrical Characteristics

54AC

VCC TA = −55°C Fig.

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

(Note 8)CL = 50 pF

Min Max

tPLH Propagation Delay 3.3 1.0 16.0 ns

S to Zn5.0 1.0 12.0

tPHL Propagation Delay 3.3 1.0 14.0 ns

S to Zn5.0 1.0 11.5

tPLH Propagation Delay 3.3 1.0 16.0 ns

E to Zn5.0 1.0 12.0

tPHL Propagation Delay 3.3 1.0 14.0 ns

E to Zn5.0 1.0 11.5

tPLH Propagation Delay 3.3 1.0 11.0 ns

In to Zn5.0 1.0 9.0

tPHL Propagation Delay 3.3 1.0 11.0 ns

In to Zn5.0 1.0 9.0

Note 8: Voltage Range 3.3 is 3.3V ±0.3V

Voltage Range 5.0 is 5.0V ±0.5V

AC Electrical Characteristics

54ACT

VCC TA = −55°C Fig.

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

(Note 9)CL = 50 pF

Min Max

tPLH Propagation Delay 5.0 1.0 11.5 ns

S to Zn

tPHL Propagation Delay 5.0 1.0 11.5 ns

S to Zn

tPLH Propagation Delay 5.0 1.0 12.0 ns

E to Zn

tPHL Propagation Delay 5.0 1.0 10.0 ns

E to Zn

tPLH Propagation Delay 5.0 1.0 8.5 ns

In to Zn

tPHL Propagation Delay 5.0 1.0 9.0 ns

In to Zn

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

Capacitance

Symbol Parameter Typ Units Conditions

CIN Input Capacitance 4.5 pF VCC = OPEN

CPD Power Dissipation 50.0 pF VCC = 5.0V

Capacitance

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100272 Version 2 Revision 3 Print Date/Time: 2011/07/28 22:22:43

54ACT157 • 54AC157

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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100272 Version 2 Revision 3 Print Date/Time: 2011/07/28 22:22:43

54ACT157 • 54AC157

16-Lead Ceramic Flatpak (F)

NS Package Number W16A

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54ACT157 • 54AC157

Notes

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100272 Version 2 Revision 3 Print Date/Time: 2011/07/28 22:22:43

54ACT157 • 54AC157

Notes

54ACT157 • 54AC157 Quad 2-Input Multiplexer

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