The MAX7301AAI+ from Maxim Integrated is a 20-bit SPI-bus GPIO expander in a 28-SSOP package. It gives a host microcontroller 20 additional push-pull I/O lines, each configurable as input or output, with an interrupt output that signals state changes without polling the SPI bus. The 26 MHz SPI clock rate keeps the bus transaction short, so it fits comfortably behind a single SPI chip-select on a crowded peripheral bus. Typical applications include PLC digital I/O modules, industrial control panels, and any embedded system that needs more GPIO than the MCU provides — think sensor arrays, LED banks, or relay drivers in factory automation or building management systems.
MAX7301AAI+ SPI GPIO Expander, 20 I/O, 26 MHz
MPNMAX7301AAI+
End of Life
Maxim Integrated MAX7301AAI+, SPI GPIO expander, 20 I/O, 26 MHz clock, 2.5V-5.5V supply, push-pull outputs, interrupt output, -40°C to 125°C, 28-SSOP package.
$9.07Ref. price · indicative, final on quote
Packaging28-SSOP (0.209", 5.30mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Output type | Push-Pull |
| Mounting | Surface Mount |
| Voltage | 2.5V ~ 5.5V |
| Current - output source (Sink) | 4.5mA, 10mA |
| Frequency | 26 MHz |
| Interface | SPI |
| Operating temperature | -40°C ~ 125°C |
| Package | Tube |
| Number of i (O) | 20 |
| Case | 28-SSOP (0.209\", 5.30mm Width) |
| Interrupt output | Yes |
Product details
Frequently asked questions
What is the datasheet for MAX7301AAI+?
Design engineers need the datasheet to verify electrical specs, pinout, and timing for their circuit design.
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Where can I buy MAX7301AAI+?
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What is the alternative for MAX7301AAI+?
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Is MAX7301AAI+ in stock?
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What is the pinout of MAX7301AAI+?
PCB layout designers need the exact pin mapping to connect the part correctly.