MCP23008-E/SS Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP23008-E/SS is an 8-bit I2C GPIO expander providing 8 general-purpose I/O lines with configurable pull-ups and interrupt-on-change output, operating at up to 1.7 MHz bus speed. It extends microcontroller GPIO over a 2-wire I2C interface in a 20-pin SSOP package, supporting 3.3 V and 5 V systems. Suitable for control panels, LED drivers, and sensor interface designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- MCP23008-E/SS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.1138(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP23008-E/SS?
- 8-bit I/O expansion over I2C with up to 1.7 MHz bus speed
- Configurable interrupt-on-change output enabling event-driven MCU wake-up
- Internal pull-up resistors programmable on all 8 I/O lines
- Supports multiple devices on the same I2C bus via 3-bit hardware address selection
- 20-pin SSOP package for compact surface-mount board designs
- Pb-free and RoHS-compliant for environmentally compliant manufacturing
What is MCP23008-E/SS used for?
MCP23008-E/SS is widely used in embedded systems needing additional GPIO without consuming extra MCU pins, such as keypad scanning, relay control, and LED indicator driving over I2C. It is also deployed in home automation hubs, industrial sensor nodes, and display controllers where 8 additional I/O lines with interrupt capability simplify firmware architecture.
What are the specifications of MCP23008-E/SS?
| Pbfree Code | Yes |
| Manufacturer Package Code | SSOP-20 |
| Factory Lead Time | 7Weeks |
| YTEOL | 9 |
| Qualification Status | Not Qualified |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| ## MCP23008-E/SS Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Philippines, Thailand |
Where can I find the MCP23008-E/SS datasheet?
MCP23008-E/SS Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP23008-E/SS?
Compatible alternatives and drop-in replacements for MCP23008-E/SS:
Frequently Asked Questions
How many I/O lines does MCP23008-E/SS add, and at what I2C bus speed does it operate?
MCP23008-E/SS provides 8 general-purpose I/O lines accessible over I2C at up to 1.7 MHz bus speed. A single device connects to any I2C-capable MCU using just 2 wires, and up to 8 MCP23008 devices can share the same bus by configuring unique 3-bit hardware addresses, delivering up to 64 additional I/O lines from one bus.
For a battery-powered IoT node, how does MCP23008-E/SS interrupt support reduce MCU power consumption?
MCP23008-E/SS has a configurable interrupt-on-change output that asserts when any of its 8 I/O pins changes state. This allows the host MCU to remain in deep sleep and only wake when a relevant input event occurs, eliminating the need for continuous I2C polling and significantly reducing average current draw in battery-operated 3.3 V or 5 V IoT nodes.
What package does MCP23008-E/SS use, and is it suitable for automated SMT assembly?
MCP23008-E/SS is supplied in a 20-pin SSOP package, a surface-mount format compatible with standard automated pick-and-place and reflow soldering processes. The SSOP-20 footprint is slightly larger than TSSOP but remains practical for high-density PCBs, and its 7-week factory lead time supports normal production scheduling for embedded I2C I/O expansion designs.
Can MCP23008-E/SS be used in designs targeting both 3.3 V and 5 V microcontroller platforms?
Yes, MCP23008-E/SS supports a supply voltage range compatible with both 3.3 V and 5 V systems, making it flexible for mixed-platform designs. Its 8 I/O lines with programmable pull-ups and 1.7 MHz I2C speed allow it to interface directly with popular MCUs such as PIC, AVR, and ARM Cortex-M devices across a range of supply voltages without level-shifting.
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