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MAX7310
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


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 320kB)
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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.

Key Features   Applications/Uses
  • 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

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

    Key Specifications:  I/O Port Expanders
    Part Number Features Interface I/O Reset Input Over Voltage Protect. Drive Current
    (mA)
    VSUPPLY
    (V)
    VSUPPLY
    (V)
    Price
    min max See Notes
    MAX7310  56 Slave IDs Serial 2-Wire 400kbit 8 Yes 5.5V 20 2.3 5.5 $1.37 @1k
    See All I/O Port Expanders (26)

    Diagram
    MAX7310: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-2698; Rev 3; 2005-03-11
    This page last modified: 2008-03-13


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