MCP23S08-E/ML Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
The MCP23S08-E/ML is an 8-bit SPI I/O expander from Microchip providing 8 GPIO lines via a 10 MHz SPI interface. It operates in a compact QFN-20 package suitable for space-constrained PCB designs. Available in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- MCP23S08-E/ML Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit SPI I/O port expander with up to 10 MHz clock frequency for fast GPIO expansion without I2C address conflicts
- Compact QFN-20 package enabling high-density PCB layouts in space-constrained embedded designs
- Hardware address pins allow up to 4 devices on the same SPI bus, expanding to 32 GPIO pins from a single interface
Applications
The MCP23S08-E/ML is commonly used in embedded systems where microcontrollers have limited GPIO pins and require additional digital I/O for driving LEDs, relays, or reading button arrays. Its SPI interface with up to 10 MHz clock speed enables fast bit-banging or hardware SPI integration in industrial control panels and consumer electronics. The compact QFN-20 footprint makes it a popular choice for PCB designs with tight space constraints.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | QFN-20 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Clock Frequency-Max | 10MHz |
| JESD-30 Code | S-PQCC-N20 |
| JESD-609 Code | e3 |
| Number of Bits | 8 |
| Number of I/O Lines | 8 |
| Number of Ports | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC20,.16SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max | 1mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| ## MCP23S08-E/ML Alternates Showing results | Image |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP23S08-E/ML:
Frequently Asked Questions
How many GPIO pins does the MCP23S08-E/ML add, and at what SPI clock speed does it operate?
The MCP23S08-E/ML provides 8 additional GPIO lines through its SPI interface, which supports clock frequencies up to 10 MHz. This allows fast read and write cycles to all 8 I/O pins, making it suitable for real-time control applications where GPIO update latency must be minimized.
How many MCP23S08 devices can share a single SPI bus in a multi-expander design?
Up to 4 MCP23S08 devices can coexist on the same SPI bus using hardware address pins A1 and A0, expanding to 32 GPIO outputs from a single SPI port. Each device occupies a unique chip-select address, and all devices operate at the same 10 MHz maximum SPI clock without bus contention.
What package does the MCP23S08-E/ML use, and how does it compare to the PDIP variant for prototyping?
The MCP23S08-E/ML uses a QFN-20 package with a 4 mm x 4 mm footprint, which is well suited for production PCBs but requires reflow soldering. For breadboard prototyping, the PDIP variant MCP23S08-E/P is a more practical choice. Both variants deliver the same 8-bit SPI I/O functionality at up to 10 MHz with identical register maps.
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