MCP23S18T-E/SO

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MCP23S18T-E/SO

IC I/O EXPANDER SPI 16B 28SOIC

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Spezifikationen

Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
NumberofI/O 16
Interface SPI
InterruptOutput Yes
OutputType Open Drain
Current-OutputSource/Sink 25mA
ClockFrequency 10 MHz
Voltage-Supply 1.8V ~ 5.5V
OperatingTemperature -40°C ~ 125°C
MountingType Surface Mount
Package/Case 28-SOIC (0.295, 7.50mm Width)

Übersicht

Description

The MCP23S18T-E/SO is a 16-bit I/O expander with an SPI interface, developed by Microchip Technology. It allows for the expansion of GPIO (General Purpose Input/Output) pins to microcontrollers with limited I/O capabilities. The device operates at a supply voltage range of 1.8V to 5.5V and supports up to 10 MHz SPI clock speed.
Key features include:
- 16 GPIO pins, configurable as input or output.
- Interrupt-on-change capability for detecting state changes on input pins.
- Individual pin configuration for pull-up resistors.
- Multiple device support on the same SPI bus using chip select lines.
The MCP23S18T-E/SO is particularly useful in applications where additional I/O is required, such as in LED control, keypad interfacing, or sensor management. Its compact SOIC package makes it suitable for space-constrained designs. Overall, it provides a cost-effective solution for enhancing I/O capacity in embedded systems.

Features

The MCP23S18T-E/SO is a 16-bit I/O expander that interfaces with microcontrollers via the Serial Peripheral Interface (SPI) bus. Key features include:
1. 16 GPIO Pins: Configurable as input or output, allowing for flexible application.
2. SPI Interface: High-speed communication with a clock rate of up to 10 MHz.
3. Multiple Device Support: Supports up to 8 devices on a single SPI bus using chip select (CS) lines.
4. Interrupt Capability: Provides interrupt-on-change functionality for input pins, enhancing responsiveness.
5. Configurable Pull-ups: Built-in pull-up resistors on input pins, simplifying design.
6. Wide Operating Voltage Range: Operates from 1.8V to 5.5V, accommodating various applications.
7. Low Power Consumption: Suitable for battery-operated devices due to its low operating current.
8. Package Options: Available in 28-pin SOIC and other packages, aiding integration into different designs.
This makes the MCP23S18T-E/SO ideal for expanding I/O capabilities in microcontroller-based systems.

Package

The MCP23S18T-E/SO is packaged in a 28-pin SOIC (Small Outlined IC) format.

Pinout

The MCP23S18T-E/SO is a 16-bit I/O expander with a total of 28 pins. It communicates via the SPI (Serial Peripheral Interface) bus. The pin functions are as follows:
1. VDD (Pin 1): Power supply input.
2. VSS (Pin 28): Ground reference.
3. SCK (Pin 2): Serial clock input.
4. SDI (Pin 3): Serial data input.
5. SDO (Pin 4): Serial data output.
6. CS (Pin 5): Chip select input.
7. GPIO (Pins 6-21): 16 general-purpose I/O pins, configurable as input or output.
8. A0, A1, A2 (Pins 22-24): Address selection pins for SPI addressing.
9. RESET (Pin 25): Active-low reset input.
10. INT (Pin 26): Interrupt output.
11. ALERT (Pin 27): Alert output for handling GPIO changes.
The MCP23S18T-E/SO is useful for expanding the number of I/O pins in microcontroller applications.

Manufacturer

The MCP23S18T-E/SO is manufactured by Microchip Technology Inc., a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions. Founded in 1989 and headquartered in Chandler, Arizona, Microchip designs and develops a wide range of semiconductor products, including microcontrollers, digital signal controllers, and various analog components. The company serves diverse markets, including automotive, industrial, consumer, and communications. Microchip is well-known for its focus on embedded control applications, providing solutions that enable engineers to develop innovative products efficiently. Their offerings also include development tools, software, and support resources to aid in product design and implementation.

Application

The MCP23S18T-E/SO is an I/O expander for microcontrollers, commonly used in applications such as LED control, button interfacing, and sensor management. It allows for the expansion of GPIOs via SPI communication, making it ideal for embedded systems, robotics, consumer electronics, and industrial automation where additional I/O is required without increasing the microcontroller's pin count.

Equivalent

The MCP23S18T-E/SO is a 16-bit I/O expander with SPI interface. Equivalent products include:
1. MCP23017 - I2C interface variant.
2. MCP23S17 - 16-bit I/O expander with SPI interface (similar characteristics).
3. PCF8575 - 16-bit I/O expander with I2C interface.
4. TCA9535 - 16-bit I/O expander with I2C interface.
Choose based on specific communication needs (SPI vs. I2C) and pin configurations.

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