MCP23008-E/ML Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
MCP23008-E/ML is an 8-bit general-purpose I/O port expander from Microchip using the I2C interface with configurable address pins. Supports interrupt output and 25 mA sink/source per pin from a 1.8 V to 5.5 V supply. Available from stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- MCP23008-E/ML Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.0800(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit GPIO expansion via I2C with up to 8 configurable addresses on one bus
- Interrupt-on-change output per pin enables efficient event-driven microcontroller designs
- Wide supply range of 1.8 V to 5.5 V with 25 mA per-pin drive capability
Applications
The MCP23008-E/ML is ideal for embedded systems that need more GPIO lines than a microcontroller provides, such as keypad scanning, LED matrix control, and relay driver boards. Its I2C interface allows multiple devices to share the same 2-wire bus, simplifying PCB routing. Industrial control panels and IoT gateway designs use it to expand digital I/O without changing the host processor.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | QFN-20 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Qualification Status | Not Qualified |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP23008-E/ML:
Frequently Asked Questions
How many I2C addresses can MCP23008-E/ML use and how are they set?
The MCP23008-E/ML supports up to 8 unique I2C addresses (0x20 through 0x27) set by 3 hardware address pins (A0, A1, A2). This allows up to 8 devices on a single I2C bus, providing a total of 64 additional GPIO pins from one bus. The address pins are tied high or low during board assembly, so no firmware configuration is needed.
What supply voltage range and per-pin current does MCP23008-E/ML support?
The MCP23008-E/ML operates from 1.8 V to 5.5 V, making it compatible with both 3.3 V and 5 V systems. Each GPIO pin can source or sink up to 25 mA, sufficient to directly drive standard LEDs without external transistors. The device draws only 1 µA in standby mode, suitable for battery-backed designs.
Can MCP23008-E/ML generate interrupts and how does the interrupt logic work?
Yes, the MCP23008-E/ML has a dedicated INT output pin that asserts low when any enabled GPIO pin changes state relative to its default or last-read value. The INTCAP and GPIO registers capture the pin state at the moment the interrupt fires, allowing the host to identify which of the 8 pins triggered the event. This interrupt-on-change feature eliminates continuous polling and reduces CPU load by up to 90% in event-driven architectures.
What is the QFN-20 package size of MCP23008-E/ML and when should I choose it over the DIP version?
The MCP23008-E/ML in QFN-20 measures 4 mm x 4 mm with a 0.5 mm pitch, offering roughly 60% less PCB area than the 18-pin PDIP variant. Choose the QFN-20 when board space is constrained or when designing compact multi-layer PCBs for wearables, IoT nodes, or handheld devices where the through-hole PDIP footprint is not practical.
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