MCP23S17T-E/ML

I/o Expanders Overview

The MCP23S17T-E/ML is a 16-bit I/O expander with an SPI interface, manufactured by Microchip Technology. It operates within a supply voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 10 MHz. The device features two interrupt output pins (INTA and INTB) and three hardware address pins for bus configuration. It is housed in a 28-pin QFN package measuring 6 x 6 mm. The component functions across an extended temperature range from -40°C to +125°C.

I/o Expanders Feature Summary

• Supports up to eight devices on the bus via three hardware address pins
• Configurable interrupt outputs supporting active-high, active-low, or open-drain modes
• Includes polarity inversion register for input port data configuration
• Features external reset input capability

I/o Expanders Applications

• Embedded systems requiring GPIO expansion
• Key matrix scanning applications
• LED control circuits

I/o Expanders Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature grade (-40°C to +125°C). Confirm the '/ML' designation corresponds to the 28-lead QFN package type. Ensure the datasheet version matches the required specifications before finalizing procurement orders.

I/o Expanders Selection Notes

Select this model when an SPI interface is preferred over I2C for higher speed communication up to 10 MHz. Choose the QFN package for compact surface-mount designs. Verify that the host system can support the required SPI protocol and provides sufficient power within the 1.8V to 5.5V operating range.

I/o Expanders Part Context

This component belongs to the MCP23X17 family, which includes both I2C (MCP23017) and SPI (MCP23S17) variants. The T suffix indicates tape and reel packaging. The E suffix denotes the industrial/extended temperature grade. The ML suffix specifies the QFN package style.

I/o Expanders Replacement Considerations

MCP23S17-E/SS: Same function in SSOP-28 package. MCP23S17-E/SO: Same function in SOIC-28 package. MCP23017T-E/ML: I2C interface variant, not pin-to-pin compatible due to different serial protocols.