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MAXIM INTEGRATED / ANALOG DEVICES MAX7321AEE I2C Port Expander

The MAX7321AEE+ is an I2C port expander featuring eight open-drain I/O ports in a 16-pin QSOP package. It supports a supply voltage range of 1.71V to 5.5V and operates within an temperature range of -40°C to 125°C. This device communicates via a 400kHz I2C serial interface and provides selectable default logic states upon power-up. Each I/O port can function as either a logic input or an open-drain output rated to sink 20mA, suitable for driving LEDs or similar loads. Ports are overvoltage protected up to +6V independently of the supply voltage. Continuous monitoring of input states allows detection of transient changes, which are latched and indicated via an open-drain interrupt output. The device has low standby current of approximately 0.6µA. It is used in applications such as cell phones, SAN/NAS storage, servers, satellite radios, and notebooks.

Authorized Distributors
Source:Newark
Part No:MAX7321AEE+
Stock:34
Inv Date:06-05-2026
Price: Unit price: $6.08
Buy/RFQ:
Source:DigiKey
Part No:MAX7321AEE+
Stock:351
Inv Date:06-05-2026
Price: Unit price: $6.08
Buy/RFQ:
Part No:MAX7321AEE+
Stock:398
Inv Date:06-06-2026
Price: Unit price: $6.05
Buy/RFQ:

MAXIM INTEGRATED / ANALOG DEVICES MAX7321AEE I2C Port Expander Specifications:

  • Operating Voltage: 1.71V to 5.5V
  • Supply Current: 0.6µA (standby), 23-55µA (active at 400kHz)
  • Input/Output Ports: 8 open-drain, rated to sink 20mA
  • Port Protection: Overvoltage to +6V
  • Operating Temperature: -40°C to 125°C
  • Package: 16-pin QSOP
  • Communication: I2C interface up to 400kHz
  • Power-up Logic: Selectable default states
  • Transition Detection: Continuous monitoring with latched flags
  • Interrupt Output: Open-drain, alerts on port state changes

Buy the Maxim MAX7321AEE+ – Reliable I2C Port Expander for Industrial Applications

Purchase the Maxim MAX7321AEE+ online today to add reliable eight-channel I2C port expansion to your system. Featuring open-drain outputs rated to sink 20mA and overvoltage protection up to +6V, it supports a supply voltage range from 1.71V to 5.5V. Its low standby current of around 0.6µA and operation over -40°C to 125°C make it ideal for industrial, networking, and consumer electronics applications. Easy to integrate with a 400kHz I2C interface, it enables detection of transient port changes with latched alerts for efficient monitoring.

Order your Maxim MAX7321AEE+ I2C port expander today and enhance your industrial and consumer electronics projects with dependable open-drain I/O ports.

Frequently Asked Questions

Where can I buy MAXIM INTEGRATED / ANALOG DEVICES MAX7321AEE?

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How do I troubleshoot issues or seek technical support for part MAX7321AEE?

You can download the MAX7321AEE datasheet or visit the MAXIM INTEGRATED / ANALOG DEVICES website for support.

Who is the manufacturer of MAX7321AEE?

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