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© Koninklijke Philips Electronics N.V. 2005. All rights reserved.

Product data sheet

Rev. 01 — 27 October 2005

3 of 16

Philips Semiconductors

CBT3257A

Quad 1-of-2 multiplexer/demultiplexer

5.

Pinning information

5.1 Pinning

5.2 Pin description

[1]

B outputs are inputs if A inputs are outputs.

Fig 2.

Pin configuration for SO16

Fig 3.

Pin configuration for SSOP16

Fig 4.

Pin configuration for SSOP16

(QSOP16)

Fig 5.

Pin configuration for TSSOP16

CBT3257AD

1B1

OE

1B2

4B1

1A

4B2

2B1

4A

2B2

3B1

2A

3B2

GND

3A

002aab768

1

2

3

4

5

6

7

8

10

9

12

11

14

13

16

15

CBT3257ADB

1B1

OE

1B2

4B1

1A

4B2

2B1

4A

2B2

3B1

2A

3B2

GND

3A

002aab769

1

2

3

4

5

6

7

8

10

9

12

11

14

13

16

15

CBT3257ADS

1B1

1B2

4B1

1A

4B2

2B1

4A

2B2

3B1

2A

3B2

GND

3A

002aab770

1

2

3

4

5

6

7

8

10

9

12

11

14

13

16

15 OE

CBT3257APW

1B1

1B2

4B1

1A

4B2

2B1

4A

2B2

3B1

2A

3B2

GND

3A

002aab771

1

2

3

4

5

6

7

8

10

9

12

11

14

13

16

15 OE

Table 2:

Pin description

Symbol

Pin

Description

S

1

select control input

1B1, 1B2, 2B1, 2B2,

3B1, 3B2, 4B1, 4B2

2, 3, 5, 6,

10, 11, 13, 14

B outputs [1]

1A, 2A, 3A, 4A

4, 7, 9, 12

A inputs

GND

8

ground (0 V)

OE

15

output enable (active LOW)

16

positive supply voltage