IN74ACT138N Integral Corp., IN74ACT138N Datasheet

IN74ACT138N

Manufacturer Part Number

IN74ACT138N

Description

1-of-8 decoder/demultiplexer high-speed silicon-gate CMOS

Manufacturer

Integral Corp.

Datasheet

1.IN74ACT138N.pdf (5 pages)

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• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 4.5 to 5.5 V

• Low Input Current: 1.0 µA; 0.1 µA @ 25°C

• Outputs Source/Sink 24 mA

HC/HCT138. The IN74ACT138 may be used as a level converter

for interfacing TTL or NMOS outputs to High Speed CMOS inputs.

active-lot outputs. This device features three Chip Select inputs,

two active-low and one active-high to facilitate the demultiplexing,

cascading, and chip-selecting functions. The demultiplexing

function is accomplished by using the Address inputs to select the

desired device output; one of the Chip Selects is used as a data

input while the other Chip Selects are held in their active states.

• TTL/NMOS Compatible Input Levels

The IN74ACT138 is identical in pinout to the LS/ALS138,

The IN74ACT138 decodes a three-bit Address to one-of-eight

LOGIC DIAGRAM

PIN 8 = GND

PIN 16 =V

-8 D

High-Speed Silicon-Gate CMOS

ECODER

IN74ACT138

H = high level (steady state)

L = low level (steady state)

X = don’t care

CS1 CS2 CS3

X X H

X H X

L X X

H L L

Inputs

EMULTIPLEXER

A2 A1 A0

H H H

X X X

L H H

H L H

H H L

FUNCTION TABLE

L L H

L H L

H L L

L L L

PIN ASSIGNMENT

Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7

H H H H H H H H

L H H H H H H H

H L H H H H H H

H H L H H H H H

H H H L H H H H

H H H H L H H H

H H H H H L H H

H H H H H H L H

H H H H H H H L

ORDERING INFORMATION

IN74ACT138N Plastic

IN74ACT138D SOIC

= -40° to 85° C for all

Outputs

packages

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IN74ACT138N Summary of contents

Page 1

... high level (steady state low level (steady state don’t care 1 ORDERING INFORMATION IN74ACT138N Plastic IN74ACT138D SOIC T = -40° to 85° C for all A packages PIN ASSIGNMENT Outputs ...

Page 2

MAXIMUM RATINGS Symbol Parameter V DC Supply Voltage (Referenced to GND Input Voltage (Referenced to GND Output Voltage (Referenced to GND) OUT I DC Input Current, per Pin Output Sink/Source ...

DC ELECTRICAL CHARACTERISTICS(Voltages Referenced to GND) Symbol Parameter V Minimum High- IH Level Input Voltage V Maximum Low - IL Level Input Voltage V Minimum High- OH Level Output Voltage V Maximum Low- OL Level Output Voltage I Maximum Input ...

Page 4

AC ELECTRICAL CHARACTERISTICS(V Symbol Parameter t Propagation Delay, Input A to Output Y PLH (Figure 1) t Propagation Delay, Input A to Output Y PHL (Figure 1) t Propagation Delay, CS2 or CS3 to Output PLH Y (Figure 3) t ...

Page 5

IN74ACT138 EXPANDED LOGIC DIAGRAM 5 ...

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IN74ACT138N Integral Corp., IN74ACT138N Datasheet

IN74ACT138N

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IN74ACT138N Summary of contents

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