MCP23S17-E/SS

I/o Expanders Overview

The MCP23S17-E/SS 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 provides 16 bidirectional I/O pins (GPA0-GPA7, GPB0-GPB7) housed in a 28-pin SSOP package. It features configurable interrupt outputs (INTA, INTB), hardware address pins (A0-A2) for up to eight devices on the bus, and an external reset input. Operating temperatures range from -40°C to +125°C.

I/o Expanders Feature Summary

• Provides 16-bit remote bidirectional I/O expansion via SPI serial interface
• Features configurable interrupt output pins that can operate independently or together
• Includes polarity inversion register to configure input port data polarity
• Supports up to eight devices on the bus using three hardware address pins

I/o Expanders Applications

• Embedded systems requiring GPIO expansion for resource-constrained microcontrollers
• Industrial control applications utilizing SPI communication protocols
• Consumer electronics designs needing additional digital input/output channels

I/o Expanders Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature grade. Confirm compliance with RoHS directives and AEC-Q100 qualification status if automotive use is intended. Ensure the selected variant aligns with the system's voltage and interface requirements before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when SPI connectivity is preferred over I2C for the I/O expansion task. Consider the 28-pin SSOP package constraints regarding PCB space and thermal dissipation. Evaluate the need for hardware address pins if multiple expanders are deployed on the same SPI bus to ensure unique addressing.

I/o Expanders Part Context

This part belongs to the MCP23X17 family, which includes both I2C (MCP23017) and SPI (MCP23S17) variants. The 'E' suffix indicates an extended industrial temperature range (-40°C to +125°C). The '/SS' suffix specifies the 28-lead Shrink Small Outline Package (SSOP) with a 5.30 mm body width.

I/o Expanders Replacement Considerations

The MCP23S17T-E/SS is a tape-and-reel version of the same functional device. For I2C interface requirements, the MCP23017-E/SS serves as the compatible alternative within the same package.