IDT54/74FCT621T/AT

FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)

MILITARY AND COMMERCIAL TEMPERATURE RANGES

6.18

2

PIN DESCRIPTION

Pin Names

Description

GBA, GAB

Enable Inputs

A Inputs or Open-drain Outputs

B Inputs or Open-drain Outputs

2538 tbl 01

FUNCTION TABLE

(1)

Enable Inputs

G

GBA

GAB

Function

L

L

B data to A bus

H

H

A data to B bus

H

L

OFF

L

H

B data to A bus

A data to B bus

NOTE:

2538 tbl 02

1. H = HIGH Voltage Level.

L = LOW Voltage Level.

OFF = HIGH if pull-up resistor is connected to Open-Drain output.

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

Symbol

Conditions

Typ.

Max. Unit

Input

Capacitance

6

10

pF

Output

Capacitance

8

12

pF

2538 lnk 03

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.

2538 lnk 04

NOTE:

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