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© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

Product data sheet

Rev. 03 — 12 November 2004

3 of 17

Philips Semiconductors

74HC243

Quad bus transceiver; 3-state

5.

Functional diagram

Fig 1.

Functional diagram

Fig 2.

Logic symbol

Fig 3.

IEC logic symbol

001aab953

ENABLE

EXITING

OEB

OEA

A0

B0

B1

A1

13

11

10

1

3

4

B2

A2

9

5

B3

A3

8

6

001aab950

ENABLE

EXITING

OEB

OEA

A0

B0

B3

A3

13

11

8

1

3

6

001aab951

1

13

EN1

1

2

11

3

10

4

9

5

8

6

EN2