Philips Semiconductors

Product specification

74LVT543

3.3V Octal latched transceiver with dual enable

(3-State)

1998 Feb 19

3

LOGIC SYMBOL (IEEE/IEC)

14

11

13

1

23

2

3

22

421

520

619

718

817

10

15

916

1EN3

G1

IC5

ZEN4 (AB)

GZ.

ZC6

V3

5D

6D

2V

SV00028

LOGIC DIAGRAM

D

LE

Q

D

LE

Q

DETAIL A

22

B0

21 B1

4

A1

20 B2

5

A2

19 B3

6

A3

18 B4

7

A4

17 B5

8

A5

16 B6

9

A6

15 B7

10

A7

DETAIL A X 7

13

OEAB

11

EAB

14

LEAB

2

OEBA

23

EBA

1

LEBA

3

A0

SV00029

PIN DESCRIPTION

PIN NUMBER

SYMBOL

FUNCTION

14, 1

LEAB / LEBA

A to B / B to A Latch Enable input (active-Low)

11, 23

EAB / EBA

A to B / B to A Enable input (active-Low)

13, 2

OEAB / OEBA

A to B / B to A Output Enable input (active-Low)

3, 4, 5, 6, 7, 8, 9, 10

A0 – A7

Port A, 3-State outputs

22, 21, 20, 19, 18, 17, 16, 15

B0 – B7

Port B, 3-State outputs

12

GND

Ground (0V)

24

Positive supply voltage

FUNCTION TABLE

INPUTS

OUTPUTS

STATUS

OEXX

EXX

LEXX

An or Bn

Bn or An

STATUS

H

X

X

X

Z

Disabled

X

H

X

X

Z

Disabled

L

L

↑

↑

L

L

h

l

Z

Z

Disabled + Latch

L

L

L

L

↑

↑

h

l

H

L

Latch + Display

L

L

L

L

L

L

H

L

H

L

Transparent

L

L

H

X

NC

Hold

H = High voltage level

h

= High voltage level one set-up time prior to the Low-to-High

transition of LEXX or EXX (XX = AB or BA)

L

= Low voltage level

l

= Low voltage level one set-up time prior to the Low-to-High

transition of LEXX or EXX (XX = AB or BA)

X = Don’t care

↑ = Low-to-High transition of LEXX or EXX (XX = AB or BA)

NC= No change

Z = High impedance or “off” state