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Product data sheet

Rev. 03 — 20 April 2005

4 of 19

Philips Semiconductors

74ABT544

Octal latched transceiver with dual enable; inverting; 3-state

6.

Pinning information

6.1 Pinning

6.2 Pin description

Fig 4.

Pin configuration

544

OEBA

EBA

A0

B0

A1

B1

A2

B2

A3

B3

A4

B4

A5

B5

A6

B6

A7

B7

EAB

LEAB

GND

OEAB

001aac755

1

2

3

4

5

6

7

8

9

10

11

12

14

13

16

15

18

17

20

19

22

21

24

23

LEBA

Table 3:

Pin description

Symbol

Pin

Description

LEBA

1

B-to-A latch enable input (active LOW)

OEBA

2

B-to-A output enable input (active LOW)

A0

3

port A, 3-state output 0

A1

4

port A, 3-state output 1

A2

5

port A, 3-state output 2

A3

6

port A, 3-state output 3

A4

7

port A, 3-state output 4

A5

8

port A, 3-state output 5

A6

9

port A, 3-state output 6

A7

10

port A, 3-state output 7

EAB

11

A-to-B enable input (active LOW)

GND

12

ground (0 V)

OEAB

13

A-to-B output enable input (active LOW)

LEAB

14

A-to-B latch enable input (active LOW)

B7

15

port B, 3-state output 7

B6

16

port B, 3-state output 6

B5

17

port B, 3-state output 5

B4

18

port B, 3-state output 4