PI4IOE5V9539 Datasheet, PDF (1/17 Pages) Pericom Semiconductor Corporation – interrupt and reset

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PI4IOE5V9539
16-bit I²C-bus and SMBus low power I/O port with interrupt and reset
Features
 Operation power supply voltage from 2.3V to 5.5V
 16-bit I²C-bus GPIO with interrupt and reset
 5V tolerant I/Os
 Polarity inversion register
 Active LOW interrupt output
 Active LOW reset input
 Low current consumption
 0Hz to 400KHz clock frequency
 Noise filter on SCL/SDA inputs
 Power-on reset
 ESD protection (4KV HBM and 1KV CDM)
 Offered in two different packages: TSSOP-24 and
TQFN 4x4-24
Description
The PI4IOE5V9539 provide 16 bits of General
Purpose parallel Input/Output (GPIO) expansion for I²C-
bus/ SMBus applications. It includes the features 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 PI4IOE5V9539 consists of two 8-bit registers to
configure the I/Os as either inputs or outputs, and two 8-
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 PI4IOE5V9539 open-drain interrupt output is
activated and indicate to the system when any 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/default
I/O input configuration to occur without de-powering the
device, holding the registers and I²C-bus state machine
in their default state until the RESET input is once again
HIGH.
Two hardware pins (A0, A1) vary the fixed I²C-bus
address and allow up to four devices to share the same
I²C-bus/SMBus.
Pin Configuration
Figure 1: TSSOP-24 ( Top View )
2016-01-0019
Figure 2: TQFN 4x4-24 ( Top View )
PT0549-3
1
02/15/16