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4-bit I

2016-01-0027

PT0556-1

02/15/16

1

PI4IOE5V9522

Features

 Operation power supply voltage from 2.3V to 5.5V

 5V tolerant I/Os

 Active Low interrupt output

 Active Low reset input

 Polarity inversion register

 Low current consumption

 0Hz to 1MHz clock frequency

 Noise filter on SCL/SDA inputs

 Power-on reset

 ESD protection (4KV HBM and 1KV CDM)

 Package offered:MSOP-10L

Pin Configuration

Description

The PI4IOE5V9522 provides 4 bits of General

Purpose parallel Input/Output (GPIO) expansion for

I

such as higher driving capability, 5V tolerance, lower

power supply, individual I/O configuration, and

smaller packaging. It provides a simple solution when

additional I/O is needed for ACPI power switches,

sensors, push buttons, LEDs, fans, etc.

The PI4IOE5V9522 consists of a 4-bit register to

configure the I/Os as either inputs or outputs, and a 4-

bit polarity registers to change the polarity of the input

port register data. The data for each input or output is

kept in the corresponding Input port or Output port

register. All registers can be read by the system master.

The PI4IOE5V9522 open-drain interrupt output

(INT) is activated when any input state and is used to

indicate the system master that an input state has

changed.

The power-on reset sets the registers to their

default values and initializes the device state machine.

The Reset pin causes the same reset/initialization to

occur without de-powering the device.

Figure1 :MSOP-10