PCA9538PW datasheet(4/28 Pages) NXP

Part #	PCA9538PW

Description	8-bit I2C-bus and SMBus low power I/O port with interrupt and reset

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Manufacturer	NXP [NXP Semiconductors]

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PCA9538_5

Product data sheet

Rev. 05 — 28 May 2009

4 of 28

NXP Semiconductors

PCA9538

8-bit I2C-bus and SMBus low power I/O port with interrupt and reset

5.2 Pin description

[1]

HVQFN16 package die supply ground is connected to both the VSS pin and the exposed center pad. The

VSS pin must be connected to supply ground for proper device operation. For enhanced thermal, 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 printed-circuit board in the thermal pad region.

Table 2.

Pin description

Symbol

Description

SO16, TSSOP16

HVQFN16

A0

1

15

address input 0

A1

2

16

address input 1

RESET

3

1

active LOW reset input

IO0

4

2

input/output 0

IO1

5

3

input/output 1

IO2

6

4

input/output 2

IO3

7

5

input/output 3

VSS

86[1]

supply ground

IO4

9

7

input/output 4

IO5

10

8

input/output 5

IO6

11

9

input/output 6

IO7

12

10

input/output 7

INT

13

11

interrupt output (open-drain)

SCL

14

12

serial clock line

SDA

15

13

serial data line

VDD

16

14

supply voltage

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