IS31IO7328 MULTI-FUNCTION I/O DRIVER January 2014 GENERAL DESCRIPTION FEATURES 2 The IS31IO7328 2-wire serial-interfaced peripheral 400kHz I C serial interface features 8 I/O ports. Ports are divided into four push 2.4V to 5.5V operation pull I/Os and four open-drain I/Os and transition 4 push-pull I/O ports detection. 4 open-drain I/O ports, rated to 20mA sink current at 0.22V headroom Any of the 8 I/O ports can be configured as an input or Selectable I/O port power-up default logic states an output. All I/O ports configured as inputs are continuously monitored for state changes (transition INTB output alerts change on inputs detection). State changes are indicated by the INTB Low 0.3 A (Typ.) standby current output. The interrupt is latched, allowing detection of -40C to +125C temperature range transient changes. When the IS31IO7328 is subsequently read through the serial interface, any APPLICATIONS pending interrupt is cleared. Cell phones The open-drain outputs are rated to sink 20mA at Notebooks 0.22V headroom, and are capable of driving LEDs. The RSTB input clears the serial interface, terminating SAN/NAS 2 any I C communication to or from the IS31IO7328. The Satellite radio 2 IS31IO7328 uses two address inputs to allow 2 I C Servers slave addresses. The slave address also determines Automotive the power-up logic state for the I/O ports. TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit Lumissil Microsystems www.lumissil.com 1 Rev. B, 01/03/2014 IS31IO7328 PIN CONFIGURATION Package Pin Configuration (Top View) AD PP2 1 12 RSTB PP1 2 11 QFN-16 INTB PP0 3 10 VCC OD3 4 9 PIN DESCRIPTION No. Pin Description 1 AD Address Inputs. Select device slave address with AD. Reset Input, active Low. Drive RSTB pin low to clear the 2 RSTB 2-wire interface. 3 INTB Interrupt output, active Low. This is an open-drain output. Positive supply voltage. Bypass V to GND with a ceramic CC 4 VCC capacitor of at least 1 F. 5,14 GND Ground. 6~9 OD0~OD3 Open-drain I/O ports. 10~13 PP0~PP3 CMOS push-pull I/O ports. 2 15 SCL I C-compatible serial-clock input. 2 16 SDA I C-compatible serial-data I/O. Thermal Pad Connect to GND. Lumissil Microsystems www.lumissil.com 2 Rev. B, 01/03/2014