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Microchip 16-Channel I/O Expander SPI SOIC 28 MCP23S17T-E/SO, 1.8V to 5.5V, 10MHz Clock Frequency
Specifications
| Country of Origin | Thailand |
|---|---|
| Brand | Microchip |
| Height | 2.65mm |
| Length | 17.9mm |
| Model | MCP23S17T-E/SO |
| Mount Type | Surface |
| Series | MCP23S17 |
| Maximum Operating Temperature | 125°C |
| Package Type | SOIC |
| Minimum Operating Temperature | -40°C |
| Interface Type | SPI |
| Pin Count | 28 |
| Maximum Supply Voltage | 5.5V |
| Minimum Supply Voltage | 1.8V |
| Clock frequency | 10MHz |
| Number of I/O Channels | 16 |
Key Features
- Provides 16 general purpose parallel I/O channels.
- Supports SPI communication with up to 10MHz clock speed.
- Operates over a wide voltage range of 1.8V to 5.5V.
- Surface mount SOIC 28 package suitable for PCB mounting.
- Wide operating temperature range from -40°C to 125°C.
- Configurable I/O direction and polarity inversion registers.
- Up to 25mA sink/source current per I/O pin.
- Supports cascading of up to 8 devices on one bus.
Product Description
Microchip MCP23S17T-E/SO is a 16-channel I/O Expander designed for industrial and commercial electronic applications requiring expansion of general purpose input/output pins. It is packaged in a 28-pin SOIC surface mount form factor and supports SPI communication protocol with clock speeds up to 10MHz. The device operates reliably across a broad voltage range of 1.8V to 5.5V and temperature range of -40°C to 125°C, making it suitable for robust environments.
This I/O expander contains multiple 8-bit configuration registers to configure each channel as input or output with options for polarity inversion. Each port data can be read or written via registers accessible over SPI, providing flexible control for embedded systems. The output pins support up to 25mA sink/source current, allowing direct interfacing with various components.
The IC features cascaded operation, allowing up to 8 devices to be connected on a single SPI bus, expanding I/O capabilities substantially. External reset input and configurable interrupt pins (INTA and INTB) provide comprehensive control and alert functions.
This device is commonly used in industrial controls, automation systems, embedded computing, and instrumentation where additional GPIO lines are needed without increasing microcontroller pin count.
Package dimensions are 17.9mm in length and 2.65mm in height, ensuring compatibility with standard PCB footprints. The product is manufactured in Thailand and adheres to no specific automotive or other industry standards.
Provides 16 general purpose parallel I/O channels. Supports SPI communication with up to 10MHz clock speed. Operates over a wide voltage range of 1.8V to 5.5V. Surface mount SOIC 28 package suitable for PCB mounting. Wide operating temperature range from -40°C to 125°C.
Configurable I/O direction and polarity inversion registers. Up to 25mA sink/source current per I/O pin. Supports cascading of up to 8 devices on one bus. Includes external reset input and interrupt sources. Ideal for industrial, commercial, and embedded systems applications.
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Frequently Asked Questions
The MCP23S17T-E/SO supports a maximum clock frequency of 10MHz for SPI communication.
This model operates over a voltage range of 1.8V to 5.5V.
It provides 16 general purpose parallel I/O channels.
The device operates within a temperature range of -40°C to 125°C.
It comes in a surface mount SOIC 28 package, suitable for PCB mounting.
Each I/O pin can sink or source up to 25mA.
Yes, it supports cascading of up to 8 devices on one SPI bus.
This unit uses the SPI interface for communication.
The dimensions are 17.9mm in length and 2.65mm in height.
It includes configurable I/O direction and polarity inversion registers.
The product is manufactured in Thailand.
It is commonly used in industrial controls, automation systems, embedded computing, and instrumentation.
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