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
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
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.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.2900 | $1.29 |
| 100+ | $1.1600 | $116.00 |
| 1000+ | $1.1300 | $1130.00 |
| 5000+ | $1.1200 | $5600.00 |
| 25600+ | $1.1105 | $28428.80 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”