MCP23S17T-E/ML Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
The MCP23S17T-E/ML is a 16-bit SPI I/O expander from Microchip in a compact QFN-28 package. It provides 16 configurable GPIO lines operating up to 10 MHz SPI clock with interrupt-on-change support. Ideal for expanding microcontroller I/O in industrial and consumer embedded designs with worldwide availability.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- MCP23S17T-E/ML Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.1200(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 bidirectional GPIO lines expandable via SPI interface at up to 10 MHz
- Interrupt-on-change output for all 16 I/O pins reduces host CPU polling overhead
- Compact VQFN-28 (QFN-28) package with 5 mm x 5 mm footprint for space-constrained PCBs
- Hardware address pins allow up to 8 devices on a single SPI bus
Applications
The MCP23S17T-E/ML is used in embedded systems that require additional GPIO capacity beyond what the host microcontroller provides, such as industrial control panels, home automation gateways, and robotics controllers. Its SPI interface at up to 10 MHz enables fast parallel port expansion in LCD keypads, LED matrix drivers, and relay output boards. The compact QFN-28 footprint and 16 configurable I/O channels also suit portable consumer devices and IoT edge nodes.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | VQFN-28 |
| Factory Lead Time | 7Weeks |
| YTEOL | 8 |
| CPU Family | MCP23X17 |
| Clock Frequency-Max | 10MHz |
| JESD-30 Code | S-PQCC-N28 |
| 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 | LCC28,.24SQ,25 |
| 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 | 0.65mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| ## MCP23S17T-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 | Philippines, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP23S17T-E/ML:
suggested
suggested
suggested
Frequently Asked Questions
How many GPIO lines does the MCP23S17T-E/ML provide and at what SPI clock speed?
The MCP23S17T-E/ML expands an MCU bus by 16 bidirectional GPIO lines communicated over SPI at up to 10 MHz, allowing rapid parallel port access while consuming only 4 SPI signal lines on the host controller.
Can multiple MCP23S17T-E/ML devices share a single SPI bus in an industrial control design?
Yes. The device provides 3 hardware address pins, supporting up to 8 MCP23S17 units on a single SPI bus, yielding up to 128 additional GPIO lines from one bus — practical for industrial relay boards requiring many 24V discrete outputs.
What package does the MCP23S17T-E/ML use and how does it compare to DIP alternatives for PCB layout?
It ships in a VQFN-28 (QFN-28) surface-mount package with a 5 mm x 5 mm body, significantly smaller than a 28-pin DIP footprint, freeing over 60% board area while supporting reflow assembly at standard 260°C peak temperatures.
When is MCP23S17T-E/ML preferable over an I2C I/O expander like MCP23017 for a real-time system?
The SPI variant reaches 10 MHz clock versus 400 kHz for I2C, cutting per-byte transfer time by roughly 25x, which matters in time-critical scanning loops updating 16 relay outputs or reading 16 sensor inputs within a 1 ms control cycle.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.5042 | $1.50 |
| 10+ | $1.1200 | $11.20 |
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