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

Product data sheet

Rev. 03 — 12 November 2004

4 of 17

Philips Semiconductors

74HC243

Quad bus transceiver; 3-state

6.

Pinning information

6.1 Pinning

6.2 Pin description

Fig 4.

Pin configuration

243

OEA

n.c.

OEB

A0

n.c.

A1

B0

A2

B1

A3

B2

GND

B3

001aab948

1

2

3

4

5

6

7

8

10

9

12

11

14

13

Table 3:

Pin description

Symbol

Pin

Description

OEA

1

output enable input (active LOW)

n.c.

2

not connected

A0

3

data input or output

A1

4

data input or output

A2

5

data input or output

A3

6

data input or output

GND

7

ground (0 V)

B3

8

data output or input

B2

9

data output or input

B1

10

data output or input

B0

11

data output or input

n.c.

12

not connected

OEB

13

output enable input

14

positive supply voltage