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Maxim > Products > Interface and Interconnect  Microcontrollers 
MAX7301
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander


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Data Sheet
FULL DATA SHEET (PDF, 352kB)
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Description
The MAX7301 compact, serial-interfaced I/O expander (or general-purpose I/O (GPIO) peripheral) provides microprocessors with up to 28 ports. Each port is individually user configurable to either a logic input or logic output.

Each port can be configured either as a push-pull logic output capable of sinking 10mA and sourcing 4.5mA, or a Schmitt logic input with optional internal pullup. Seven ports feature configurable transition detection logic, which generates an interrupt upon change of port logic level. The MAX7301 is controlled through an SPI™-compatible 4-wire serial interface.

The MAX7301AAX and MAX7301ATL have 28 ports and are available in 36-pin SSOP and 40-pin TQFN packages, respectively. The MAX7301AAI has 20 ports and is available in a 28-pin SSOP package.

For a 2-wire I²C-interfaced version, refer to the MAX7300 data sheet.

For a pin-compatible port expander with additional 24mA constant-current LED drive capability, refer to the MAX6957 data sheet.

Key Features   Applications/Uses
  • High-Speed 26MHz SPI-/QSPI-™/MICROWIRE™-Compatible Serial Interface
  • 2.5V to 5.5V Operation
  • -40°C to +125°C Temperature Range
  • 20 or 28 I/O Ports, Each Configurable as
    • Push-Pull Logic Output
    • Schmitt Logic Input
    • Schmitt Logic Input with Internal Pullup
  • 11µA (max) Shutdown Current
  • Logic Transition Detection for Seven I/O Ports

 
  		• Automotive
  		• Gaming Machines
  		• Industrial Controllers
  		• System Monitoring
  		• White Goods

    Key Specifications:   I/O Port Expanders
    Part Number Features Interface Inputs/Outputs Interrupt Output Drive Current (mA) Supply Voltage (min) (V) Supply Voltage (max) (V) RoHS Available Package Smallest Available Package (max w/pins) (mm2) Price**
    MAX7301 
    •Transition detection, Direct LED drive with blinking
    		 Serial SPI 26Mbit 20 or 28 Yes 10 2.5 5.5 Yes PDIP/28
    SSOP/28
    SSOP/36
    THIN QFN/40     		37 $2.55 @ 1k
    See All I/O Port Expanders (26)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX7301: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 1879: Using Maxim SPI-compatible Display Drivers with other SPI Peripherals - MAX7301
  		• Application Note 2199: Driving LEDs with Push-Pull Port Expander Outputs - MAX7301
  		• Application Note 2852: Using a PC to Experiment with the MAX7300/MAX7301 Port Expanders - MAX7301
  		• Application Note 4021: MAX6956 Programming Guide - MAX7301

    Evaluation Kits
    none

    Design Guides
  		• INTERFACE (PDF)
  		• SYSTEM TIMING & CONTROL (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-12 of 12

    MAX7301 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7301ANI  
    		PDIP;28 pin;290 mm²
    Dwg: 21-0043D (PDF)
    Use pkgcode/variation: N28-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7301ANI+  
    		PDIP;28 pin;290 mm²
    Dwg: 21-0043D (PDF)
    Use pkgcode/variation: N28+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7301AAI  
    		SSOP;28 pin;82 mm²
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A28-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7301AAI-T  
    		SSOP;28 pin;82 mm²
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A28-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7301AAI+T  
    		SSOP;28 pin;82 mm²
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A28+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7301AAI+  
    		SSOP;28 pin;82 mm²
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A28+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7301AAX+T  
    		SSOP;36 pin;163 mm²
    Dwg: 21-0040E (PDF)
    Use pkgcode/variation: A36+4*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7301AAX+  
    		SSOP;36 pin;163 mm²
    Dwg: 21-0040E (PDF)
    Use pkgcode/variation: A36+4*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7301AAX-T  
    		SSOP;36 pin;163 mm²
    Dwg: 21-0040E (PDF)
    Use pkgcode/variation: A36-4*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7301AAX  
    		SSOP;36 pin;163 mm²
    Dwg: 21-0040E (PDF)
    Use pkgcode/variation: A36-4*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7301ATL+  
    		THIN QFN;40 pin;37 mm²
    Dwg: 21-0141I (PDF)
    Use pkgcode/variation: T4066+5*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7301ATL+T  
    		THIN QFN;40 pin;37 mm²
    Dwg: 21-0141I (PDF)
    Use pkgcode/variation: T4066+5*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Related Products
    MAX6957 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander
    MAX7300 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander
    MAX6956 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander
    MAX7310 2-Wire-Interfaced 8-Bit I/O Port Expander with Reset
    MAX7311 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection
    MAX6965 9-Output LED Driver with Intensity Control and Hot-Insertion Protection
    MAX7312 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection
    MAX7313 16-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
    MAX7315 8-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
    MAX7316 10-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
    MAX7314 18-Port GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection
    MAX6964 17-Output LED Driver/GPO with Intensity Control and Hot-Insertion Protection
    MAX7317 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection
    MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection
    MAX1608, MAX1609 Octal, SMBus-to-Parallel I/O Expanders

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     Description 
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    Document Ref.: 19-2438; Rev 6; 2006-04-19
    This page last modified: 2008-03-13




             


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