IDT54/74FCT543T/AT/CT/DT - 2543T/AT/CT

FAST CMOS OCTAL LATCHED TRANSCEIVER

MILITARY AND COMMERCIAL TEMPERATURE RANGES

6.17

2

PIN CONFIGURATIONS

DIP/SOIC/SSOP/QSOP/CERPACK

TOP VIEW

5

6

7

8

9

10

11

12

GND

1

2

3

4

24

23

22

21

20

19

18

17

Vcc

16

15

14

13

P24-1

D24-1

SO24-2

SO24-7

SO24-8

&

E24-1

LEAB

OEAB

LEBA

OEBA

CEAB

CEBA

LCC

TOP VIEW

5

6

7

8

9

10

11

L28-1

25

24

23

22

21

20

19

INDEX

NC

NC

12 13 14 15 16 17 18

43

2

1

28 27 26

2613 drw 02

2613 drw 03

FUNCTION TABLE

(1, 2)

For A-to-B (Symmetric with B-to-A)

Latch

Output

Inputs

Status

Buffers

CEAB

CEAB

LEAB

LEAB

OEAB

OEAB

A-to-B

H

—

—

Storing

High Z

—

H

—

Storing

—

—

—

H

—

High Z

L

L

L

Transparent

Current A Inputs

L

H

L

Storing

Previous* A Inputs

NOTES:

2613 tbl 02

1. * Before

LEAB LOW-to-HIGH Transition

H = HIGH Voltage Level

L = LOW Voltage Level

— = Don’t Care or Irrelevant

2. A-to-B data flow shown; B-to-A flow control is the same, except using

CEBA, LEBA and OEBA.

ABSOLUTE MAXIMUM RATINGS

(1)

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.

2613 lnk 03

PIN DESCRIPTION

Pin Names

Description

OEAB

A-to-B Output Enable Input (Active LOW)

OEBA

B-to-A Output Enable Input (Active LOW)

CEAB

A-to-B Enable Input (Active LOW)

CEBA

B-to-A Enable Input (Active LOW)

LEAB

A-to-B Latch Enable Input (Active LOW)

LEBA

B-to-A Latch Enable Input (Active LOW)

A-to-B Data Inputs or B-to-A 3-State Outputs

B-to-A Data Inputs or A-to-B 3-State Outputs

2613 tbl 01

°C, f = 1.0MHz)

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.

2613 lnk 04