MCP23S08T-E/SS Microchip Integrated Circuit (Small Outline Packages) In Stock
The MCP23S08T-E/SS is an 8-bit general-purpose parallel I/O port expander that communicates via SPI, adding 8 GPIO pins to any microcontroller. It operates from a 1.8 V to 5.5 V supply and comes in a 20-pin SSOP package. Available from stock worldwide with fast shipping options.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- MCP23S08T-E/SS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.1105(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP23S08T-E/SS?
- 8-bit SPI-controlled GPIO expander adding 8 configurable I/O pins
- Supply voltage range of 1.8 V to 5.5 V for wide system compatibility
- SPI interface supporting up to 10 MHz clock speed
- Open-drain interrupt output for event-driven system designs
- 20-pin SSOP package compatible with standard SMT assembly
- Internal pull-up resistors on all I/O pins
What is MCP23S08T-E/SS used for?
The MCP23S08T-E/SS is commonly used in embedded systems that require GPIO expansion when microcontroller pins are fully allocated, such as industrial control panels, display drivers, and multi-button input interfaces. It is also deployed in IoT gateways and peripheral management circuits where the SPI bus is shared among several expansion devices to reduce system cost and PCB complexity.
What are the specifications of MCP23S08T-E/SS?
| Pbfree Code | Yes |
| Manufacturer Package Code | SSOP-20 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Qualification Status | Not Qualified |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| ## MCP23S08T-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 |
Where can I find the MCP23S08T-E/SS datasheet?
MCP23S08T-E/SS Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP23S08T-E/SS?
Compatible alternatives and drop-in replacements for MCP23S08T-E/SS:
suggested
suggested
suggested
Frequently Asked Questions
How many additional GPIO pins does MCP23S08T-E/SS provide and over which interface?
The MCP23S08T-E/SS provides 8 additional GPIO pins controlled via an SPI interface running up to 10 MHz. Each pin is independently configurable as input or output, with optional internal pull-up resistors, making it a straightforward expander for any SPI-capable microcontroller.
Can MCP23S08T-E/SS operate in a 3.3 V system alongside a 5 V peripheral?
The MCP23S08T-E/SS supports a supply voltage range of 1.8 V to 5.5 V, so it can be powered at 3.3 V or 5 V. When mixing voltage domains, level shifting on SPI lines may be required, but the device itself is compatible with both 3.3 V and 5 V logic levels.
What interrupt capability does MCP23S08T-E/SS offer for event-driven designs?
The device provides an open-drain interrupt output that asserts when any monitored input pin changes state. This allows the host MCU to sleep between events rather than polling the 8 GPIO lines, reducing CPU overhead in battery-powered or latency-sensitive systems.
How does the 20-pin SSOP package of MCP23S08T-E/SS affect sourcing and handling?
The SSOP-20 package has a 0.65 mm pin pitch, which fits standard SMT assembly lines but requires fine-pitch stencil apertures. The tape-and-reel suffix T in the MPN confirms the parts arrive in reel form suitable for automated pick-and-place production runs.
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