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MAX7301AAX from MAX,MAXIM - Dallas Semiconductor

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MAX7301AAX

Manufacturer: MAX, MAXIM

4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander

Partnumber Manufacturer Quantity Availability
MAX7301AAX MAX, MAXIM 99 In Stock

Description and Introduction

4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander The MAX7301AAX is a serial-interfaced peripheral manufactured by Maxim Integrated (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Maxim Integrated (Analog Devices)  
- **Type:** I/O Expander  
- **Interface:** SPI (Serial Peripheral Interface)  
- **Operating Voltage:** 2.7V to 5.5V  
- **Number of I/O Pins:** 20 (configurable as inputs or outputs)  
- **Maximum Output Current per Pin:** 25mA  
- **Maximum Total Output Current:** 100mA  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 36-Pin SSOP  

### **Descriptions:**
The MAX7301AAX is a high-performance I/O expander that provides 20 configurable GPIO pins. It communicates with a host microcontroller via a 4-wire SPI interface, enabling easy expansion of digital I/O in embedded systems. It includes internal pull-up resistors and features low-power operation, making it suitable for battery-powered applications.

### **Features:**
- **20 Programmable I/O Pins:** Each pin can be individually configured as an input or output.  
- **SPI Interface:** Supports clock speeds up to 26MHz.  
- **Internal Pull-Up Resistors:** Configurable for each input.  
- **High Drive Strength:** 25mA sink/source per I/O pin.  
- **Low Standby Current:** Typically 1µA in shutdown mode.  
- **Interrupt Output:** Notifies the host of input state changes.  
- **Industrial Temperature Range:** Operates from -40°C to +85°C.  
- **Compact Package:** 36-pin SSOP for space-constrained designs.  

This device is commonly used in industrial control, consumer electronics, and embedded systems requiring additional I/O expansion.

Application Scenarios & Design Considerations

4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander

Alternative Part Number

  • PCA9555PW --: 16-bit I2C GPIO expander with similar functionality and pin count, widely available and cost-effective alternative.
  • MCP23017-E/SS --: 16-bit I2C I/O expander offering comparable GPIO expansion features in a similar SSOP package.
  • TCA9555PWR --: 16-bit I2C GPIO expander with interrupt output, functionally similar and commonly used as a drop-in style alternative.
  • MCP23S17-E/SS --: SPI I/O expander with 16 GPIO pins in SSOP, functionally similar to the MAX7301 SPI port expander and widely available.
  • PCF8574AT --: I2C 8-bit I/O expander in SOIC, a common lower-cost alternative for simple GPIO expansion though with fewer pins and I2C interface.

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