6.6

2

IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT

FAST CMOS QUAD 2-INPUT MULTIPLEXER

MILITARY AND COMMERCIAL TEMPERATURE RANGES

PIN DESCRIPTION

Pin Names

Description

Source 0 Data Inputs

Source 1 Data Inputs

E

Enable Input (Active LOW)–FCT157T

OE

Output Enable (Active LOW)–FCT257T/2257T

S

Select Input

Outputs

2537 tbl 01

FUNCTION TABLE

(1)

Inputs

EE/OE

OE

157

257

HX

X

X

L

Z

LH

X

L

L

L

LH

X

H

H

H

LL

L

X

L

L

LL

H

X

H

H

NOTE:

2537 tbl 02

1. H = HIGH Voltage Level

L = LOW Voltage Level

X = Don’t Care

Z = High Impedance

ABSOLUTE MAXIMUM RATINGS

(1)

°C, f = 1.0MHz)

Symbol

Rating

Commercial

Military

Unit

with Respect to

GND

–0.5 to +7.0

–0.5 to +7.0

V

with Respect to

GND

–0.5 to

–0.5 to

V

Operating

Temperature

0 to +70

–55 to +125

°C

Temperature

Under Bias

–55 to +125

–65 to +135

°C

Storage

Temperature

–55 to +125

–65 to +150

°C

Power Dissipation

0.5

0.5

W

DC Output

Current

–60 to +120

–60 to +120

mA

NOTES:

1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-

INGS 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 may exceed

3. Outputs and I/O terminals only.

Symbol

Conditions

Typ.

Max. Unit

Input

Capacitance

6

10

pF

Output

Capacitance

8

12

pF

NOTE:

1. This parameter is measured at characterization but not tested.

2537 lnk 03

2537 lnk 04