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2-Wire-Interfaced 8-Bit I/O Port Expander with Reset

2-Wire-Interfaced 8-Bit I/O Port Expander with Reset can Sink Up to 30mA per Port for SMBus™-Compatible and I²C-Compatible Applications

Product Details

Key Features

Applications/Uses

Parametric specs for I/O Port Expanders
Interface Serial 2-Wire 400kbit
I/O 8
Reset Input Yes
Over Voltage Protection (V) 5.5
Drive Current (mA) 20
VSUPPLY (V) (min) 2.3
VSUPPLY (V) (max) 5.5
Package/Pins QSOP/16
TQFN/16
TSSOP/16
Budgetary
Price (See Notes)
2.21
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Simplified Block Diagram

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Parameters

Parametric specs for I/O Port Expanders
Interface Serial 2-Wire 400kbit
I/O 8
Reset Input Yes
Over Voltage Protection (V) 5.5
Drive Current (mA) 20
VSUPPLY (V) (min) 2.3
VSUPPLY (V) (max) 5.5
Package/Pins QSOP/16
TQFN/16
TSSOP/16
Budgetary
Price (See Notes)
2.21

Key Features

  • 400kHz 2-Wire Interface
  • 2.3V to 5.5V Operation
  • Low Standby Current (1.7µA typ)
  • Bus Timeout for Lock-Up-Free Operation
  • 56 Slave ID Addresses
  • Polarity Inversion
  • Eight I/O Pins that Default to Inputs on Power-Up
  • 5V Tolerant Open-Drain Output on I/O0
  • 4mm x 4mm, 0.8mm Thin QFN Package
  • -40°C to +125°C Operation

Applications/Uses

  • Cellular Handsets
  • Desktop Computers: Motherboards
  • GPIO
  • Industrial Control
  • Industrial Displays
  • Instrumentation and Test Measurement
  • Medical Equipment
  • RAID Systems
  • Servers
  • White LED Drivers

Description

The MAX7310 provides 8-bit parallel input/output port expansion for SMBus™-compatible and I²C-compatible applications. The MAX7310 consists of an input port register, an output port register, a polarity inversion register, a configuration register, a bus timeout register, and an SMBus/I²C-compatible serial interface. The system master can invert the MAX7310 input data by writing to the active-high polarity inversion register. The system master can enable or disable bus timeout by writing to the bus timeout register.

Any of the eight I/O ports can be configured as input or output. An active-low reset input sets the eight I/Os as inputs. Three address-select pins configure one of 56 slave ID addresses.

The MAX7310 is available in 16-pin thin QFN, TSSOP, and QSOP packages and is specified over the -40°C to +125°C automotive temperature range.

Simplified Block Diagram

MAX7310: Typical Operating Circuit MAX7310: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .