MCP23S09-E/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
The MCP23S09-E/P is an 8-bit SPI I/O expander from Microchip providing 8 GPIO lines via a 10 MHz SPI interface. It operates from 1.8 V to 5.5 V and comes in an 18-pin DIP package, making it ideal for adding GPIO to space-limited or legacy-friendly microcontroller designs.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 18
- Lifecycle
- ACTIVE
- Datasheet
- MCP23S09-E/P Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.2500(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP23S09-E/P?
- 8-bit SPI I/O port expander with up to 10 MHz clock
- Single configurable interrupt output pin for efficient host polling
- 1.8 V to 5.5 V supply range for mixed-voltage systems
- 8 individually configurable GPIO lines with internal pull-up resistors
- Hardware address pins allowing multiple devices on one SPI bus
- Through-hole PDIP-18 package for easy prototyping and breadboarding
What is MCP23S09-E/P used for?
The MCP23S09 is commonly used to expand the GPIO count of microcontrollers in industrial I/O panels, home automation controllers, and embedded systems with limited pins. Its SPI interface with interrupt output simplifies integration into designs that require monitoring multiple digital inputs such as switches, limit sensors, and status flags.
What are the specifications of MCP23S09-E/P?
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-18 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Clock Frequency-Max | 10MHz |
| JESD-30 Code | R-XDIP-T18 |
| JESD-609 Code | e3 |
| Number of Bits | 8 |
| Number of I/O Lines | 8 |
| Number of Ports | 1 |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | DIP18,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Supply Current-Max | 1mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 1.8V |
| Supply Voltage-Nom | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Where can I find the MCP23S09-E/P datasheet?
MCP23S09-E/P Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP23S09-E/P?
Compatible alternatives and drop-in replacements for MCP23S09-E/P:
Frequently Asked Questions
How many additional I/O lines does MCP23S09-E/P add to an SPI-based microcontroller design?
The MCP23S09-E/P provides 8 independently configurable I/O pins over SPI, effectively doubling the available GPIO on a host MCU that has limited pins. Each line can be configured as input or output, and internal pull-up resistors can be enabled individually.
At what SPI clock speed can MCP23S09-E/P operate, and does that limit real-time I/O updates?
The MCP23S09 supports SPI clock speeds up to 10 MHz, which is fast enough to read or write all 8 I/O lines in under 3 µs per transaction. This speed is well suited for real-time button scanning, LED control, or relay switching in industrial and consumer designs.
Can MCP23S09-E/P be used in 3.3 V and 5 V mixed-voltage designs without a level shifter?
Yes. The MCP23S09-E/P supports an operating voltage range of 1.8 V to 5.5 V, making it compatible with both 3.3 V and 5 V microcontroller I/O standards without additional level-shifting circuitry, which reduces BOM cost and board space.
What are the key procurement considerations for MCP23S09-E/P, including lead time and lifecycle?
Microchip lists MCP23S09-E/P with a factory lead time of approximately 6 weeks and a YTEOL of 9 years, indicating active production. The PDIP-18 through-hole package is widely stocked at distribution, making it straightforward to source for low-volume or prototype quantities.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.6900 | $1.69 |
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