74ACT139SCX - National Semiconductor

TL/F/9926

54AC/74AC139 #54ACT/74ACT139 Dual 1-of-4 Decoder/Demultiplexer

February 1993

54AC/74AC139 #54ACT/74ACT139

Dual 1-of-4 Decoder/Demultiplexer

General Description

The ’AC/’ACT139 is a high-speed, dual 1-of-4 decoder/de-

multiplexer. The device has two independent decoders,

each accepting two inputs and providing four mutually-ex-

clusive active-LOW outputs. Each decoder has an active-

LOW Enable input which can be used as a data input for a

4-output demultiplexer. Each half of the ’AC/’ACT139 can

be used as a function generator providing all four minterms

of two variables.

Features

YICC reduced by 50%

YMultifunction capability

YTwo completely independent 1-of-4 decoders

YActive LOW mutually exclusive outputs

YOutputs source/sink 24 mA

Y’ACT139 has TTL-compatible inputs

YStandard Military Drawing (SMD)

Ð’AC139: 5962-87623

Ð’ACT139: 5962-87553

Logic Symbols

TL/F/9926–8

TL/F/9926–1

IEEE/IEC

TL/F/9926–2

Connection Diagrams

Pin Assignment

for DIP, Flatpak and SOIC

TL/F/9926–3

Pin Assignment

for LCC

TL/F/9926–4

Pin Names Description

A0,A

1Address Inputs

EEnable Inputs

O0–O3Outputs

FACTTM is a trademark of National Semiconductor Corporation.

C1995 National Semiconductor Corporation RRD-B30M75/Printed in U. S. A.

Functional Description

The ’AC/’ACT139 is a high-speed dual 1-of-4 decoder/de-

multiplexer. The device has two independent decoders,

each of which accepts two binary weighted inputs (A0–A1)

and provides four mutually exclusive active-LOW outputs

(O0–O3). Each decoder has an active-LOW enable (E).

When E is HIGH all outputs are forced HIGH. The enable

can be used as the data input for a 4-output demultiplexer

application. Each half of the ’AC/’ACT139 generates all four

minterms of two variables. These four minterms are useful

in some applications, replacing multiple gate functions as

shown in

Figure a

, and thereby reducing the number of

packages required in a logic network.

TL/F/9926–6

FIGURE a. Gate Functions (Each Half)

Truth Table

Inputs Outputs

E A0A1O0O1O2O3

HXXHHHH

LLL LHHH

LHLHLHH

LLHHHLH

LHHHHHL

HIGH Voltage Level

LeLOW Voltage Level

XeImmaterial

Logic Diagram

TL/F/9926–5

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

Absolute Maximum Rating (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales

Office/Distributors for availability and specifications.

Supply Voltage (VCC)b0.5V to a7.0V

DC Input Diode Current (IIK)

VIeb

0.5V b20 mA

VIeVCC a0.5V a20 mA

DC Input Voltage (VI)b0.5V to VCC a0.5V

DC Output Diode Current (IOK)

VOeb

0.5V b20 mA

VOeVCC a0.5V a20 mA

DC Output Voltage (VO)b0.5V to VCC a0.5V

DC Output Source

or Sink Current (IO)g50 mA

DC VCC or Ground Current

per Output Pin (ICC or IGND)g50 mA

Storage Temperature (TSTG)b65§Ctoa

150§C

Junction Temperature (TJ)

CDIP 175§C

PDIP 140§C

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 recom-

mend operation of FACTTM circuits outside databook specifications.

Recommended Operating

Conditions

Supply Voltage (VCC)

’AC 2.0V to 6.0V

’ACT 4.5V to 5.5V

Input Voltage (VI) 0VtoV

Output Voltage (VO) 0VtoV

Operating Temperature (TA)

74AC/ACT b40§Ctoa

85§C

54AC/ACT b55§Ctoa

125§C

Minimum Input Edge Rate (DV/Dt)

’AC Devices

VIN from 30% to 70% of VCC

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

Minimum Input Edge Rate (DV/Dt)

’ACT Devices

VIN from 0.8V to 2.0V

VCC @4.5V, 5.5V 125 mV/ns

DC Characteristics for ’AC Family Devices

74AC 54AC 74AC

Symbol Parameter VCC TAea

25§CTAeTAeUnits Conditions

(V) b55§Ctoa

125§Cb40§Ctoa

85§C

Typ Guaranteed Limits

VIH Minimum High Level 3.0 1.5 2.1 2.1 2.1 VOUT e0.1V

Input Voltage 4.5 2.25 3.15 3.15 3.15 V or VCC b0.1V

5.5 2.75 3.85 3.85 3.85

VIL Maximum Low Level 3.0 1.5 0.9 0.9 0.9 VOUT e0.1V

Input Voltage 4.5 2.25 1.35 1.35 1.35 V or VCC b0.1V

5.5 2.75 1.65 1.65 1.65

VOH Minimum High Level 3.0 2.99 2.9 2.9 2.9 IOUT eb

50 mA

Output Voltage 4.5 4.49 4.4 4.4 4.4 V

5.5 5.49 5.4 5.4 5.4

*VIN eVIL or VIH

3.0 2.56 2.4 2.46 b12 mA

4.5 3.86 3.7 3.76 V IOH b24 mA

5.5 4.86 4.7 4.76 b24 mA

VOL Maximum Low Level 3.0 0.002 0.1 0.1 0.1 IOUT e50 mA

Output Voltage 4.5 0.001 0.1 0.1 0.1 V

5.5 0.001 0.1 0.1 0.1

*VIN eVIL or VIH

3.0 0.36 0.50 0.44 12 mA

4.5 0.36 0.50 0.44 V IOL 24 mA

5.5 0.36 0.50 0.44 24 mA

*All outputs loaded; thresholds on input associated with output under test.

DC Characteristics for ’AC Family Devices (Continued)

74AC 54AC 74AC

Symbol Parameter VCC TAea

25§CTAeTAeUnits Conditions

(V) b55§Ctoa

125§Cb40§Ctoa

85§C

Typ Guaranteed Limits

IIN Maximum Input 5.5 g0.1 g1.0 g1.0 mAVIeVCC, GND

Leakage Current

IOLD ²Minimum Dynamic 5.5 50 75 mA VOLD e1.65V Max

IOHD Output Current 5.5 b50 b75 mA VOHD e3.85V Min

ICC Maximum Quiescent 5.5 4.0 80.0 40.0 mAVIN eVCC

Supply Current or GND

²Maximum test duration 2.0 ms, one output loaded at a time.

Note: 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

74ACT 54ACT 74ACT

Symbol Parameter VCC TAea

25§CTAeTAeUnits Conditions

(V) b55§Ctoa

125§Cb40§Ctoa

85§C

Typ Guaranteed Limits

VIH Minimum High Level 4.5 1.5 2.0 2.0 2.0 VVOUT e0.1V

Input Voltage 5.5 1.5 2.0 2.0 2.0 or VCC b0.1V

VIL Maximum Low Level 4.5 1.5 0.8 0.8 0.8 VVOUT e0.1V

Input Voltage 5.5 1.5 0.8 0.8 0.8 or VCC b0.1V

VOH Minimum High Level 4.5 4.49 4.4 4.4 4.4 VIOUT eb

50 mA

Output Voltage 5.5 5.49 5.4 5.4 5.4

*VIN eVIL or VIH

4.5 3.86 3.70 3.76 VI

b24 mA

5.5 4.86 4.70 4.76 b24 mA

VOL Maximum Low Level 4.5 0.001 0.1 0.1 0.1 VIOUT e50 mA

Output Voltage 5.5 0.001 0.1 0.1 0.1

*VIN eVIL or VIH

4.5 0.36 0.50 0.44 VI

24 mA

5.5 0.36 0.50 0.44 24 mA

IIN Maximum Input 5.5 g0.1 g1.0 g1.0 mAV

CC, GND

Leakage Current

ICCT Maximum 5.5 0.6 1.6 1.5 mA VIeVCC b2.1V

ICC/Input

IOLD ²Minimum Dynamic 5.5 50 75 mA VOLD e1.65V Max

IOHD Output Current 5.5 b50 b75 mA VOHD e3.85V Min

ICC Maximum Quiescent 5.5 4.0 80.0 40.0 mAVIN eVCC

Supply Current or GND

*All outputs loaded; thresholds on input associated with output under test.

²Maximum test duration 2.0 ms, one output loaded at a time.

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

AC Electrical Characteristics

74AC 54AC 74AC

VCC*TAea

25§CTAeb

55§CT

40§C

Symbol Parameter (V) CLe50 pF to a125§Cto

85§C Units

CLe50 pF CLe50 pF

Min Typ Max Min Max Min Max

tPLH Propagation Delay 3.3 4.0 8.0 11.5 1.0 14.5 3.5 13.0 ns

Anto On5.0 3.0 6.5 8.5 1.0 11.0 2.5 9.5

tPHL Propagation Delay 3.3 3.0 7.0 10.0 1.0 12.5 2.5 11.0 ns

Anto On5.0 2.5 5.5 7.5 1.0 10.0 2.0 8.5

tPLH Propagation Delay 3.3 4.5 9.5 12.0 1.0 14.5 3.5 13.0 ns

Ento On5.0 3.5 7.0 8.5 1.0 11.0 3.0 10.0

tPHL Propagation Delay 3.3 4.0 8.0 10.0 1.0 12.5 3.0 11.0 ns

Ento On5.0 2.5 6.0 7.5 1.0 10.0 2.5 8.5

*Voltage Range 3.3 is 3.3V g0.3V

Voltage Range 5.0 is 5.0V g0.5V

AC Electrical Characteristics

74ACT 54ACT 74ACT

VCC*TAea

25§CTAeb

55§CT

40§C

Symbol Parameter (V) CLe50 pF to a125§Cto

85§C Units

CLe50 pF CLe50 pF

Min Typ Max Min Max Min Max

tPLH Propagation Delay 5.0 1.5 6.0 8.5 1.0 12.0 1.5 9.5 ns

Anto On

tPHL Propagation Delay 5.0 1.5 6.0 9.5 1.0 11.0 1.5 10.5 ns

Anto On

tPLH Propagation Delay 5.0 2.5 7.0 10.0 1.0 12.5 2.0 11.0 ns

Ento On

tPHL Propagation Delay 5.0 2.0 7.0 9.5 1.0 12.0 1.5 10.5 ns

Ento On

*Voltage Range 5.0 is 5.0V g0.5V

Capacitance

Symbol Parameter Typ Units Conditions

CIN Input Capacitance 4.5 pF VCC eOPEN

CPD Power Dissipation 40.0 pF VCC e5.0V

Capacitance

Ordering Information

The device number is used to form part of a simplified purchasing code where the package type and temperature range are

defined as follows:

74ACT 139 P C QR

Temperature Range Family Special Variations

74AC eCommercial X eDevices shipped in 13×reels

54AC eMilitary QR eCommercial grade device

74ACT eCommercial TTL-Compatible with burn-in

54ACT eMilitary TTL-Compatible QB eMilitary grade device with

environmental and burn-in

Device Type processing shipped in tubes

Package Code Temperature Range

PePlastic DIP CeCommercial (b40§Ctoa

85§C)

DeCeramic DIP MeMilitary (b55§Ctoa

125§C)

FeFlatpak

LeLeadless Ceramic Chip Carrier (LCC)

SeSmall Outline (SOIC)

Physical Dimensions inches (millimeters)

20 Terminal Ceramic Leadless Chip Carrier (L)

NS Package Number E20A

16 Lead Ceramic Dual In-Line Package (D)

NS Package Number J16A

Physical Dimensions inches (millimeters) (Continued)

16 Lead Small Outline Integrated Circuit (S)

NS Package Number M16A

16 Lead Plastic Dual-In-Line Package (P)

NS Package Number N16E

54AC/74AC139 #54ACT/74ACT139 Dual 1-of-4 Decoder/Demultiplexer

Physical Dimensions inches (millimeters) (Continued)

16 Lead Ceramic Flatpak (F)

NS Package Number W16A

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failure to perform, when properly used in accordance support device or system, or to affect its safety or

with instructions for use provided in the labeling, can effectiveness.

be reasonably expected to result in a significant injury

to the user.

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