HIT HD74HC139 Datasheet

HD74HC139

Dual 2-to-4-line Decoders/Demultiplexers

Description

The HD74HC139 contains two independent two-to-four-line decoders each with a single active low enable
input (1G or 2G). Data on the slect inputs (1A and 1B or 2A and 2B) cause one of the four normally high
outputs to go low.

Features

• High Speed Operation: tpd (A, B to Y, 4 levels) = 14 ns typ (CL = 50 pF)

• High Output Current: Fanout of 10 LSTTL Loads

• Wide Operating Voltage: VCC = 2 V to 6 V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

Function Table

Inputs
Enable Select Outputs
GB A Y

HXX HHHH
LL L L H H H
LL H H L H H
LHL HHL H
LHHHHHL

0

Y

1

Y

2

Y

3

HD74HC139

Pin Arrangement

Data
Outputs

Logic Diagram (1/2)

Enable

Enable

Select

1G

1A

1B

1Y

1Y1

1Y2

1Y3

GND

1

2

3

G

A

B

G

A

16

15

14

V

2G

2A

CC

Enable

Select

4

0

5

6

7

Y0

Y

Y2

Y3

B

1

Y

Y1

Y2

3

Y

8

13

2B

0

12

11

10

9

2Y

2Y1

2Y2

2Y3

0

Outputs

Data
Outputs

(Top view)

0

Y

A

B

Y1

Y2

Y3

2

HD74HC139

DC Characteristics

Ta = –40 to

Ta = 25°C

Item Symbol V

Input voltage V

IH

(V) Min Typ Max Min Max Unit Test Conditions

CC

2.0 1.5 — — 1.5 — V

4.5 3.15 — — 3.15 —

6.0 4.2 — — 4.2 —

V

IL

2.0 — — 0.5 — 0.5 V

4.5 — — 1.35 — 1.35

6.0 — — 1.8 — 1.8

Output voltage V

OH

2.0 1.9 2.0 — 1.9 — V Vin = VIH or VILIOH = –20 µA

4.5 4.4 4.5 — 4.4 —

6.0 5.9 6.0 — 5.9 —

4.5 4.18 — — 4.13 — IOH = –4 mA

6.0 5.68 — — 5.63 — IOH = –5.2 mA

V

OL

2.0 — 0.0 0.1 — 0.1 V Vin = VIH or VILIOL = 20 µA

4.5 — 0.0 0.1 — 0.1

6.0 — 0.0 0.1 — 0.1

4.5 — — 0.26 — 0.33 IOL = 4 mA

6.0 — — 0.26 — 0.33 IOL = 5.2 mA
Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND
Quiescent supply

I

CC

6.0 — — 4.0 — 40 µA Vin = VCC or GND, Iout = 0 µA
current

+85°C

3