MCP23S18-E/MJ Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
Microchip MCP23S18 is a 16-bit SPI I/O expander with 16 GPIO lines across 2 ports, operating at up to 10 MHz clock frequency. It features interrupt-on-change, programmable pull-ups, and open-drain interrupt output for flexible interface designs.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 24
- Lifecycle
- ACTIVE
- Datasheet
- MCP23S18-E/MJ Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.5846(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 16-bit GPIO expansion via SPI interface operating up to 10 MHz
- 2 independent 8-bit I/O ports with programmable pull-up resistors
- Interrupt-on-change for all 16 I/O pins with configurable open-drain output
- Hardware address pins allowing up to 8 devices on a single bus
- Low-power operation with wide supply voltage range from 1.8 V to 5.5 V
Applications
The MCP23S18 is widely used in industrial automation, embedded systems, and consumer electronics applications where additional GPIO ports are needed beyond what the host microcontroller provides. Typical designs include keyboard matrix scanning, LED matrix driving, relay control boards, and sensor interface panels. It is also used in PLC I/O modules and multi-channel digital control applications.
Specifications
| Manufacturer Package Code | QFN-24 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Clock Frequency-Max | 10MHz |
| JESD-30 Code | S-PQCC-N24 |
| JESD-609 Code | e3 |
| Number of Bits | 16 |
| Number of I/O Lines | 16 |
| Number of Ports | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC24,.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 | 1.8V |
| 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 |
| ## MCP23S18-E/MJ 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 MCP23S18-E/MJ:
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Frequently Asked Questions
How many GPIO pins does the MCP23S18 add to a host microcontroller via SPI?
The MCP23S18 provides 16 GPIO pins organized as two independent 8-bit ports, all accessible over a single SPI bus at up to 10 MHz clock frequency, greatly expanding I/O capability without adding more microcontroller pins.
Can multiple MCP23S18 devices share the same SPI bus without address conflicts?
Yes. The MCP23S18 supports hardware address selection via 3 address pins, allowing up to 8 devices to coexist on the same SPI bus, and each device is independently selectable using a dedicated chip-select line.
What interrupt capabilities does MCP23S18 offer for event-driven embedded designs?
The MCP23S18 supports interrupt-on-change for all 16 I/O pins with configurable open-drain interrupt outputs rated at 5 V logic. Each port has its own interrupt pin, enabling the host MCU to detect pin state changes without polling.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.5846 | $1.58 |
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