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MCP23S17-E/SS

MCHPMCP23S17-E/SS

Microchip Technology
I/O Expander 16 SPI 10 MHz 28-SSOP
NRND12,153 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The MCP23S17-E/SS is a 16-bit, general-purpose parallel I/O expander for SPI bus applications. It allows microcontrollers with limited GPIO to add sixteen bidirectional pins using only a few control lines. This version is AEC-Q100 qualified for automotive reliability and operates over a wide voltage range of 1.8V to 5.5V.

Why Choose This Part

This device features three hardware address pins, allowing up to eight chips to share the same SPI chip select line for a total of 128 I/O ports. It also includes internal power-on reset (POR) and configurable pull-up resistors on each pin, reducing external component count and simplifying board layout.

Applications

Dashboard Controls
Expanding GPIO for automotive instrument clusters to manage buttons, LEDs, and status indicators.
Industrial PLC Modules
Adding isolated digital inputs or outputs to programmable logic controllers via the high-speed 10 MHz SPI interface.
Keypad Matrices
Scanning large switch matrices without consuming dozens of native MCU pins.
System Monitoring
Using the dual configurable interrupt outputs to alert the host processor of state changes on remote sensors.

Key Specifications

Features POR
Interface SPI
Output Type Push-Pull
Mounting Type Surface Mount
Number of I/O 16
Package / Case 28-SSOP (0.209", 5.30mm Width)
Clock Frequency 10 MHz
Interrupt Output Yes
Voltage - Supply 1.8V ~ 5.5V
Operating Temperature -40degC ~ 125degC
Supplier Device Package 28-SSOP
Current - Output Source/Sink 25mA

Getting Started

Engineers can evaluate this part using the MCP23X17 Evaluation Board or by interfacing it with any SPI-capable microcontroller like a PIC or AVR. The device is supported by the Microchip MPLAB Code Configurator (MCC) for rapid driver generation and register setup.

MCP23S17-E/ Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
MCP23S17-E/SS (this part) SSOP-28 12,153
MCP23S17-E/SO SOIC-28 47,281
Also available as: MCP23S17-E/SP

Also Consider

MCP23017-E/SS MCHPMicrochip Technology - Identical 16-bit I/O functionality but utilizes the I2C interface instead of SPI.
PCAL6524HEAZ NXP Semiconductors - Offers 24 bits of I/O expansion for higher density requirements in a single package.

Categories

Interface ICs > I/O Expanders