MCP23S17-E/SSVAO

I/o Expanders Overview

The MCP23S17-E/SSVAO is a 16-bit SPI I/O expander in a 28-pin SSOP package. It features three hardware address pins for up to eight devices on the bus and configurable interrupt outputs (INTA, INTB). Operating voltage ranges from 1.8V to 5.5V with standby current of 1µA max at -40°C to +85°C. Maximum SPI clock frequency is 10MHz. The device supports internal weak pull-ups, polarity inversion, and external reset inputs.

I/o Expanders Feature Summary

• Configurable interrupt output pins supporting active-high, active-low, or open-drain modes
• Three hardware address pins enabling up to eight devices on a single serial bus
• Internal weak pull-up resistors available on all I/O ports

I/o Expanders Applications

• Embedded systems requiring GPIO expansion via SPI interface
• Industrial control panels utilizing AEC-Q100 qualified components
• Key matrix scanning applications with interrupt-on-change detection

I/o Expanders Procurement Notes

Verify the specific suffix 'SSOVAO' against official Microchip documentation to confirm package type and qualification status. Ensure the ordering code matches the required SSOP-28 form factor and automotive-grade reliability specifications before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when an SPI interface is preferred over I2C for higher speed data transfer up to 10MHz. The extended temperature range capability up to +125°C makes it suitable for harsh industrial environments where standard commercial grade parts may fail.

I/o Expanders Part Context

This part belongs to the MCP23X17 family, which includes both I2C (MCP23017) and SPI (MCP23S17) variants. The 'E' indicates an extended temperature range, while 'SSOVAO' specifies the SSOP package and likely automotive or specific regional qualification.

I/o Expanders Replacement Considerations

Direct functional replacements include other MCP23S17 variants with different packages such as MCP23S17-E/SO or MCP23S17-E/ML. Verify pin compatibility and register mapping before substituting.