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I²C Port Expander with Eight Push-Pull Outputs

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

Product Details

Key Features

Parametric specs for I/O Port Expanders
Interface Serial - I2C Compatible
Serial 2-Wire 400kbit
Outputs 8
Reset Input Yes
Drive Current (mA) 25
VSUPPLY (V) (min) 1.71
VSUPPLY (V) (max) 5.5
Package/Pins QSOP/16
TQFN/16
Budgetary
Price (See Notes)
1.33
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Simplified Block Diagram

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Parameters

Parametric specs for I/O Port Expanders
Interface Serial - I2C Compatible
Serial 2-Wire 400kbit
Outputs 8
Reset Input Yes
Drive Current (mA) 25
VSUPPLY (V) (min) 1.71
VSUPPLY (V) (max) 5.5
Package/Pins QSOP/16
TQFN/16
Budgetary
Price (See Notes)
1.33

Key Features

  • 400kHz, +5.5V-Tolerant I²C Serial Interface
  • +1.71V to +5.5V Operating Voltage
  • Eight Push-Pull Output Ports with Selectable Power-Up Logic States
  • Active-Low RST Clears the Serial Interface, Terminating Any Serial Transaction to or from the MAX7320
  • AD0 and AD2 Inputs Select from 16 Slave Addresses
  • Low 0.6µA (typ) Standby Current
  • -40°C to +125°C Temperature Range

Applications/Uses

  • Cell Phones/PDAs
  • Notebooks
  • RAID
  • Satellite Radios
  • Servers

Description

The MAX7320 2-wire serial-interfaced peripheral features eight push-pull outputs with selectable power-up logic states.

The +5.5V tolerant active-low RST input clears the serial interface, terminating any I²C communication to or from the MAX7320.

The MAX7320 uses two address inputs with four-level logic to allow 16 I²C slave addresses. The slave address also determines the power-up state level for the outputs in groups of four ports.

The MAX7320 supports hot insertion. The serial interface SDA, SCL, AD0, AD2, and active-low RST remain high impedance in power-down (V+ = 0V) with up to +6V asserted on them.

The MAX7320 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 MAX7320 is available in 16-pin QSOP and 16-pin TQFN packages, and is specified over the automotive temperature range (-40°C to +125°C).

Simplified Block Diagram

MAX7320: Typical Application Circuit MAX7320: Typical Application 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 .