MAX7321
Info: : PRODUCTION
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MAX7321

I2C Port Expander with 8 Open-Drain I/Os

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An 8 Push-Pull Output GPIO/LED Driver with an RST Input Software Compatible with the MAX7324, MAX7325, MAX7326 and MAX7327 (16-Port GPIOs)

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $1.40
Features
  • 400kHz I2C Serial Interface
  • +1.71V to +5.5V Operating Voltage
  • 8 Open-Drain I/O Ports Rated to 20mA Sink Current
  • I/O Ports Are Overvoltage Protected to +6V
  • Any Port Can Be a Logic Input or an Open-Drain Output
  • Selectable I/O Port Power-Up Default Logic States
  • Transient Changes Are Latched, Allowing Detection Between Read Operations
  • active-low INT Output Alerts Change on Inputs
  • AD0 and AD2 Inputs Select from 16 Slave Addresses
  • Low 0.6µA (typ) Standby Current
  • -40°C to +125°C Operating Temperature
Additional Details
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The MAX7321 2-wire serial-interfaced peripheral features eight open-drain I/O ports with selectable internal pullups and transition detection. Any port may be used as a logic input or an open-drain output. Ports are overvoltage protected to +6V independent of supply voltage.

All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the open-drain, active-low INT output. The interrupt is latched, allowing detection of transient changes. When the MAX7321 is subsequently accessed through the serial interface, any pending interrupt is cleared.

The open-drain outputs are rated to sink 20mA and are capable of driving LEDs.

The +6V tolerant active-low RST input clears the serial interface, terminating any I2C communication to or from the MAX7321.

The MAX7321 uses two address inputs with four-level logic to allow 16 I2C slave addresses. The slave address also determines the power-up logic state for the I/O ports, and enables or disables internal 40kΩ pullups in groups of four ports.

The MAX7321 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports.

The MAX7321 is available in 16-pin QSOP and TQFN packages, and is specified over the automotive temperature range (-40°C to +125°C).

Applications

  • Cell Phones
  • Notebooks
  • SAN/NAS
  • Satellite Radio
  • Servers
Part Models 4
1ku List Price Starting From $1.40

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX7321AEE+
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MAX7321AEE+T
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MAX7321ATE+
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MAX7321ATE+T
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Product Lifecycle

PCN

Jan 9, 2015

- 1481

WAFER FAB

MAX7321AEE+

PRODUCTION

MAX7321AEE+T

PRODUCTION

MAX7321ATE+

PRODUCTION

MAX7321ATE+T

PRODUCTION

Apr 9, 2018

- 1682

ASSEMBLY

MAX7321ATE+

PRODUCTION

MAX7321ATE+T

PRODUCTION

Jun 20, 2016

- 1612

ASSEMBLY

MAX7321ATE+

PRODUCTION

MAX7321ATE+T

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jan 9, 2015

- 1481

arrow down

WAFER FAB

MAX7321AEE+

PRODUCTION

MAX7321AEE+T

PRODUCTION

MAX7321ATE+

PRODUCTION

MAX7321ATE+T

PRODUCTION

Apr 9, 2018

- 1682

arrow down

ASSEMBLY

MAX7321ATE+

PRODUCTION

MAX7321ATE+T

PRODUCTION

Jun 20, 2016

- 1612

arrow down

ASSEMBLY

MAX7321ATE+

PRODUCTION

MAX7321ATE+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX7321EVKIT

Evaluation Kit for the MAX7321

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MAX7321EVKIT

Evaluation Kit for the MAX7321

Evaluation Kit for the MAX7321

Features and Benefits

  • Wide 1.71V to 5.5V Supply Range
  • Windows 2000/XP- and Windows Vista (32-Bit)-Compatible Software
  • USB-PC Connection (Cable Included)
  • USB Powered
  • Lead(Pb)-Free and RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX7321 evaluation kit (EV kit) provides a proven design to evaluate the MAX7321 I²C port expander with eight open-drain I/Os. The EV kit also includes Windows® 2000/XP- and Windows Vista®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the MAX7321. The MAX7321 EV kit PCB comes with a MAX7321ATE+ installed.

Applications

  • Automotive
  • Cell Phones
  • Notebooks
  • SAN/NAS
  • Satellite Radio
  • Servers

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