SN54LVTH543, SN74LVTH543

3.3-V ABT OCTAL REGISTERED TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS704D – AUGUST 1997 – REVISED APRIL 1999

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POST OFFICE BOX 655303

description (continued)

the minimum value of the resistor is determined by the current-sinking capability of the driver.

disables the outputs, preventing damaging current backflow through the device when it is powered down. The

power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,

which prevents driver conflict.

The SN54LVTH543 is characterized for operation over the full military temperature range of –55

°C to 125°C.

The SN74LVTH543 is characterized for operation from –40

°C to 85°C.

FUNCTION TABLE†

INPUTS

OUTPUT

CEAB

LEAB

OEAB

A

B

H

X

X

X

Z

X

XH

X

Z

L

HL

X

B0‡

L

LL

L

L

L

L

L

H

H

† A-to-B data flow is shown; B-to-A flow control is the

same except that it uses CEBA, LEBA, and OEBA.

‡ Output level before the indicated steady-state

input conditions were established

4

2C6

14

3

A1

4

A2

B1

22

5D

5

A3

6

A4

7

A5

8

A6

9

A7

10

A8

B2

21

B3

20

B5

18

B4

19

B6

17

B8

15

B7

16

LEAB

3

G2

11

CEAB

2EN4

13

OEAB

1C5

1

LEBA

G1

23

CEBA

1EN3

2

OEBA

6D

§ This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

Pin numbers shown are for the DB, DGV, DW, JT, PW, and W packages.

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