PCA9535_PCA9535C_3

© NXP B.V. 2007. All rights reserved.

Product data sheet

Rev. 03 — 4 October 2007

5 of 32

NXP Semiconductors

PCA9535; PCA9535C

5.2 Pin description

[1]

On the PCA9535 the I/Os are configurable as totem-pole or open-drain, whereas the I/Os on PCA9535C

are open-drain only.

[2]

electrical, and board-level performance, the exposed pad needs to be soldered to the board using a

corresponding thermal pad on the board, and for proper heat conduction through the board thermal vias

need to be incorporated in the PCB in the thermal pad region.

Table 3.

Pin description

Symbol

Pin

Description

SO24, TSSOP24

HVQFN24,

HWQFN24

INT

1

22

interrupt output (open-drain)

A1

2

23

address input 1

A2

3

24

address input 2

IO0_0

4

1

port 0 input/output[1]

IO0_1

5

2

IO0_2

6

3

IO0_3

7

4

IO0_4

8

5

IO0_5

9

6

IO0_6

10

7

IO0_7

11

8

12

9[2]

supply ground

IO1_0

13

10

port 1 input/output

IO1_1

14

11

IO1_2

15

12

IO1_3

16

13

IO1_4

17

14

IO1_5

18

15

IO1_6

19

16

IO1_7

20

17

A0

21

18

address input 0

SCL

22

19

serial clock line

SDA

23

20

serial data line

24

21

supply voltage