MCP23008T-E/SSVAO

Overview

The MCP23008T-E/SSVAO is an 8-bit I/O expander featuring an I2C serial interface, manufactured by Microchip Technology. It operates within a supply voltage range of 1.8 V to 5.5 V and supports clock frequencies up to 1.7 MHz. The device provides eight bidirectional general-purpose I/O pins with configurable interrupt outputs and internal weak pull-up resistors. It is housed in a 20-pin SSOP package and is designed for industrial temperature ranges from -40°C to +125°C.

Feature Summary

• Provides 8-bit remote bidirectional I/O expansion via a high-speed I2C interface.
• Features configurable interrupt output with options for active-high, active-low, or open-drain modes.
• Includes hardware address pins allowing up to eight devices on a single bus.
• Supports input polarity inversion and internal weak pull-up resistor configuration.

Applications

• Embedded systems requiring GPIO expansion for resource-constrained microcontrollers.
• Industrial control interfaces utilizing I2C communication protocols.
• Consumer electronics applications needing additional input/output ports.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct package type and tape-and-reel specifications. Confirm that the component meets all required environmental and electrical standards for the intended application before finalizing procurement orders.

Selection Notes

Select this component when an 8-bit I/O expansion solution with I2C connectivity is required. Ensure the system design accommodates the 20-pin SSOP package dimensions and that the I2C bus speed requirements do not exceed the specified maximum frequency for the operating voltage range.

Part Context

This part belongs to the MCP23X08 family of 8-bit I/O expanders. It differs from the MCP23S08 variant by utilizing an I2C interface instead of SPI. The 'E' designation indicates extended temperature range capability, while 'SSVAO' specifies the SSOP package and RoHS compliance status.

Replacement Considerations

Direct functional substitutes include other MCP23008 variants with different packaging options such as SOIC or QFN. Verify pin compatibility and register mapping when replacing with components from other manufacturers offering similar I2C GPIO expander functionality.

FAQ

How many hardware address pins does the MCP23008 have?

The MCP23008 has three hardware address pins (A2, A1, and A0), allowing up to eight devices to be addressed on the same I2C bus.

What is the maximum operating voltage for this device?

The maximum operating voltage for the MCP23008T-E/SSVAO is 5.5 V across its specified temperature range.

Can the interrupt output be configured as open-drain?

Yes, the interrupt output pin can be configured as open-drain, active-high, or active-low using the IOCON register.