Microchip Technology

MCP23S18-E/SO  

I/O Expanders

MCP23S18-E/SO Description

The MCP23S18-E/SO from Microchip Technology is a high-performance 16-bit I/O expander designed for SPI interface applications. Housed in a 28-SOIC package, this device operates within a 1.8V to 5.5V supply range, making it versatile for both low-power and standard voltage systems. With a 10 MHz clock frequency, it ensures rapid data transfer, while its open-drain output type provides flexibility in interfacing with various logic levels. The MCP23S18-E/SO is RoHS3 compliant and features an interrupt output for efficient event-driven system designs.

MCP23S18-E/SO Features

• 16 I/O Pins: Configurable as inputs or outputs with individual direction control.
• SPI Interface: Enables seamless communication with microcontrollers, supporting high-speed 10 MHz operation.
• Wide Voltage Range (1.8V–5.5V): Compatible with 3.3V and 5V systems, ideal for mixed-voltage environments.
• 25mA Source/Sink Current per I/O: Robust drive capability for LEDs, relays, and other peripherals.
• Interrupt Output: Reduces polling overhead by signaling input state changes.
• Open-Drain Outputs: Allows wired-OR configurations and easy level shifting.
• Surface-Mount (SOIC) Package: Suitable for compact PCB designs.
• Low Power Consumption: Optimized for battery-operated and energy-efficient applications.

MCP23S18-E/SO Applications

The MCP23S18-E/SO excels in systems requiring expanded I/O without microcontroller pin overhead, such as:

• Industrial Control Panels: For button/switch interfacing and LED driving.
• Consumer Electronics: Keypad scanning, display control, and GPIO expansion in smart devices.
• Embedded Systems: Sensor arrays, relay control, and peripheral management.
• Automotive Interfaces: Non-critical signal conditioning and auxiliary I/O expansion.
• IoT Edge Devices: Low-power GPIO extension for sensors and actuators.

Conclusion of MCP23S18-E/SO

The MCP23S18-E/SO stands out for its SPI efficiency, wide voltage compatibility, and robust I/O capabilities, making it a superior choice over parallel I/O expanders in space-constrained designs. Its interrupt-driven architecture minimizes MCU workload, while the open-drain outputs enhance design flexibility. Whether for industrial automation, consumer tech, or IoT, this I/O expander delivers reliable performance and scalability.

MCP23S18-E/SO Documents

Download datasheets and manufacturer documentation for MCP23S18-E/SO

PCN Assembly/Origin :

Die Attach Material 13/Feb/2021      

Datasheets :

MCP23018,23S18      

PCN Packaging :

Packing Changes 10/Oct/2016       Label and Packing Changes 23/Sep/2015      

HTML Datasheet :

MCP23018,23S18      

Environmental Information :

Microchip CA Prop65       Microchip RoHS       Microchip REACH