IS31IO7328 Datasheet, PDF (1/15 Pages) Integrated Silicon Solution, Inc – MULTI-FUNCTION I/O DRIVER

IS31IO7328
MULTI-FUNCTION I/O DRIVER
GENERAL DESCRIPTION
The IS31IO7328 2-wire serial-interfaced peripheral
features 8 I/O ports. Ports are divided into four push
pull I/Os and four open-drain I/Os and transition
detection.
Any of the 8 I/O ports can be configured as an input or
an output. All I/O ports configured as inputs are
continuously monitored for state changes (transition
detection). State changes are indicated by the INT ^_______
output. The interrupt is latched, allowing detection of
transient changes. When the IS31IO7328 is
subsequently read through the serial interface, any
pending interrupt is cleared.
The open-drain outputs are rated to sink 20mA at
0.22V headroom, and are capable of driving LEDs.
________
The RST input clears the serial interface, terminating
any I²C communication to or from the IS31IO7328. The
IS31IO7328 uses two address inputs to allow 2 I²C
slave addresses. The slave address also determines
the power-up logic state for the I/O ports.
January 2012
FEATURES
 400kHz I²C serial interface
 2.4V to 5.5V operation
 4 push-pull I/O ports
 4 open-drain I/O ports, rated to 20mA sink current
at 0.22V headroom
 Selectable I/O port power-up default logic states
_______
 INT output alerts change on inputs
 Low 0.3μA (Typ.) standby current
 -40°C to +125°C temperature range
APPLICATIONS
 Cell phones
 Notebooks
 SAN/NAS
 Satellite radio
 Servers
 Automotive
TYPICAL APPLICATION CIRCUIT
Figure 1 Typical Application Circuit
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev.A, 12/27/2011