Diagramas Datasheep Del 74Ls139

DUAL 1-OF-4 DECODER/ DEMULTIPLEXER
The LSTTL/MSI SN54/74LS139 is a high speed Dual 1-of-4 Decoder /Demultiplexer. The device has two independent decoders, each accepting two inputs and providing four mutually exclusive 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 LS139 can be used as a functiongenerator providing all four minterms of two variables. The LS139 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families.

SN54/74LS139

DUAL 1-OF-4 DECODER/ DEMULTIPLEXER
LOW POWER SCHOTTKY

• • • • • •

Schottky Process for High Speed Multifunction Capability Two Completely Independent 1-of-4 Decoders Active LowMutually Exclusive Outputs Input Clamp Diodes Limit High Speed Termination Effects ESD > 3500 Volts CONNECTION DIAGRAM DIP (TOP VIEW)
VCC 16 Eb 15 AOb 14 A1b 13 O0b 12 O1b 11 O2b 10 O3b 9
NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.

J SUFFIX CERAMIC CASE 620-09
16 1

16 1

N SUFFIX PLASTIC CASE 648-08

1 Ea

2 A0a

3 A1a

4 O0a5 O1a

6 O2a

7 O3a

8 GND
16 1

D SUFFIX SOIC CASE 751B-03

PIN NAMES A0, A1 E O0 – O3 Address Inputs Enable (Active LOW) Input Active LOW Outputs (Note b)

LOADING (Note a) HIGH 0.5 U.L. 0.5 U.L. 10 U.L. LOW 0.25 U.L. 0.25 U.L. 5 (2.5) U.L.

ORDERING INFORMATION
SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC

NOTES: a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW. b)The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges.

LOGIC DIAGRAM
Ea
1 2

LOGIC SYMBOL
1 2 3 15 14 13

A0a A1a
3 15

Eb
14

A0b A1b
13

E

A0 A1

E

A0 A1

DECODER a
O0 O1 O2 O3

DECODER b
O0 O1 O2 O3

VCC = PIN 16 GND = PIN 8 = PIN NUMBERS

4

5

6

7

12 11 10 9

VCC = PIN 16 GND = PIN 8

45

6

7

12

11

10

9

O0a

O1a

O2a

O3a

O0b

O1b

O2b

O3b

FAST AND LS TTL DATA 5-235

SN54/74LS139
FUNCTIONAL DESCRIPTION The LS139 is a high speed dual 1-of-4 decoder/demultiplexer fabricated with the Schottky barrier diode process. The device has two independent decoders, each of which accept two binary weighted inputs (A0, A1) and provide four mutuallyexclusive 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 LS139 generates all four minterms of two variables. These four minterms are useful in some applications, replacing multiple gate functions as shown in Fig. a, and therebyreducing the number of packages required in a logic network.

TRUTH TABLE
INPUTS E H L L L L A0 X L H L H A1 X L L H H O0 H L H H H OUTPUTS O1 H H L H H O2 H H H L H O3 H H H H L

E A0 A1 E A0 A1 E A0 A1 E A0 A1

E O0 A0 A1 E O1 A0 A1 E O2 A0 A1 E O3 A0 A1

O0

O1

O2

O3

H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care

Figure a

GUARANTEED OPERATING RANGES
SymbolVCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current — High Output Current — Low Parameter 54 74 54 74 54, 74 54 74 Min 4.5 4.75 – 55 0 Typ 5.0 5.0 25 25 Max 5.5 5.25 125 70 – 0.4 4.0 8.0 Unit V °C mA mA

FAST AND LS TTL DATA 5-236

SN54/74LS139

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol VIH VIL VIK VOHParameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage 54 74 54, 74 VOL Output LOW Voltage 74 Input HIGH Current Input LOW Current Short Circuit Current (Note 1) Power Supply Current – 20 0.35 0.5 20 0.1 – 0.4 –100 11 V µA mA mA mA mA 2.5 2.7 54 74 – 0.65 3.5 3.5 0.25 0.4 Min 2.0 0.7 0.8 – 1.5 V V V V Typ Max Unit V V Test Conditions Guaranteed Input HIGH Voltage...