6.9

2

IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT

FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS

MILITARY AND COMMERCIAL TEMPERATURE RANGES

FUNCTION TABLE

(2)

2539 tbl 01

2539 tbl 02

NOTES:

1. 640 is inverting from input to output.

2. H = HIGH Voltage Level

L = LOW Voltage Level

X = Don't Care

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.

2539 lnk 03

Symbol

Conditions

Typ.

Max. Unit

Input

Capacitance

6

10

pF

Output

Capacitance

8

12

pF

2539 lnk 04

NOTE:

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

PIN DESCRIPTION

Pin Names

Description

OE

Output Enable Input (Active LOW)

T/

R

Transmit/Receive Input

Side A Inputs or 3-State Outputs

Side B Inputs or 3-State Outputs

Inputs

OE

OE

T/

RR

Outputs

L

L

L

H

H

X

High Z State