7.3

2

IDT54/74FCT138/A/C

FAST CMOS 1-OF-8 DECODER-WITH ENABLE

MILITARY AND COMMERCIAL TEMPERATURE RANGES

PIN DESCRIPTION

Pin Names

Description

Address Inputs

Enable Inputs (Active LOW)

Enable Input (Active HIGH)

Outputs (Active LOW)

2581 tbl 05

FUNCTION TABLE

Inputs

Outputs

O

O

O

O

O

O

O

H

X

X

X

X

X

H

H

H

HHH

HH

X

H

X

X

X

X

H

H

H

HHH

HH

X

X

L

X

X

X

H

H

H

HHH

HH

L

L

H

L

L

L

L

H

H

HHH

HH

L

L

HH

L

L

H

L

H

HHH

HH

L

L

H

L

H

L

H

H

L

HHH

HH

L

L

HH

H

L

H

H

H

L

HH

HH

L

L

HL

LH

H

H

H

H

LH

H

H

L

L

HH

L

H

H

H

H

H

H

L

HH

L

L

H

L

HH

H

H

H

HHH

L

H

L

L

HH

HH

H

H

H

HHH

H

L

2581 tbl 06

ABSOLUTE MAXIMUM RATINGS

(1)

Symbol

Rating

Commercial

Military

Unit

–0.5 to +7.0

–0.5 to +7.0

V

with Respect

to GND

V

with Respect

to GND

Operating

0 to +70

–55 to +125

°C

Temperature

Temperature

–55 to +125

–65 to +135

°C

Under Bias

Storage

–55 to +125

–65 to +150

°C

Temperature

Power Dissipation

0.5

0.5

W

DC Output Current

120

120

mA

NOTES:

2581 tbl 01

1. Stresses greater than those listed under ABSOLUTE MAXIMUM

RATINGS may cause permanent damage to the device. This is a stress

rating only and functional operation of the device at these or any other

conditions above those indicated in the operational sections of this

specification is not implied.

Exposure to absolute maximum rating

conditions for extended periods may affect reliability. No terminal voltage

3. Outputs and I/O terminals only.

°C, f = 1.0MHz)

Symbol

Parameter

(1)

Conditions

Typ. Max. Unit

Input Capacitance

6

10

pF

8

12

pF

NOTE:

2581 tbl 02

1. This parameter is guaranteed characterization data and not tested.