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
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
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.
Related Guides
DP83848 10/100 Mbps Ethernet PHY Transceiver: How to Choose the Right Variant
A complete selection guide for the DP83848 family: compare temperature grades, packages, JTAG support, and interface options across all five variants.
Jun 2, 2026
LM5156 Wide-VIN Boost/SEPIC/Flyback Controller: How to Choose the Right Variant
A concise selection guide for the LM5156 and LM51561 family: how to choose between automotive vs industrial grade, spread-spectrum vs fixed-frequency, and WSON-8 vs HTSSOP-14 package.
Jun 2, 2026
24LC01B I2C EEPROM Design Guide: Pinout, Write Timing, and Package Selection
Complete application note for the Microchip 24LC01B 1 Kbit I2C EEPROM: address wiring, pull-up sizing, acknowledge polling, page-write alignment, and package selection.
Jun 1, 2026
AD8531ARTZ-REEL7 Application Note: High-Current Op-Amp Design Guide
A complete design guide for the AD8531ARTZ-REEL7 250 mA rail-to-rail op-amp: decoupling, thermal budgeting, capacitive load stability, and PCB layout best practices.
Jun 1, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
More from Microchip
PIC16LF88-I/SS
Small Outline Packages
Integrated Circuit
25AA02E48-I/SN
Small Outline Packages
Integrated Circuit
PIC18F1220-I/SO
Small Outline Packages
Integrated Circuit
MIC5319-1.8YD5-TR
SOT23 (5-Pin)
Integrated Circuit
dsPIC33FJ256GP710A-I/PT
Quad Flat Packages
Integrated Circuit
BM70BLES1FC2-0B03AA
Other
Integrated Circuit
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”