MCP23016-I/SP Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
Microchip MCP23016-I/SP is a 16-channel I2C I/O expander with two 8-bit ports, 400 kHz bus speed, interrupt output, and 2.7 V to 5.5 V supply in a 28-pin SPDIP package.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- MCP23016-I/SP Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.6300(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP23016-I/SP?
- 16 individually configurable I/O lines organized as two 8-bit ports with interrupt-on-change output, enabling MCU GPIO expansion over a 2-wire I2C bus at up to 400 kHz
- Hardware address pins allow up to 8 MCP23016 devices on a single I2C bus, providing up to 128 additional GPIO lines from just 2 MCU pins
- 2.7 V to 5.5 V supply range and through-hole 28-pin SPDIP package suit both 3.3 V and 5 V systems in prototyping and industrial control applications
What is MCP23016-I/SP used for?
The MCP23016-I/SP is used in embedded systems that need to expand MCU I/O over a standard I2C bus, such as LED matrix drivers, relay control boards, keypad scanners, and industrial PLC front panels. Its 16-bit port with interrupt-on-change capability allows a host processor to detect external events without polling, reducing CPU load in real-time control applications. The through-hole SPDIP package makes it popular in development boards, prototyping shields, and educational projects where breadboard compatibility is required.
What are the specifications of MCP23016-I/SP?
| Pbfree Code | Yes |
| Manufacturer Package Code | SPDIP-28 |
| Factory Lead Time | 6Weeks |
| YTEOL | 3 |
| Clock Frequency-Max | 0.4MHz |
| JESD-30 Code | R-PDIP-T28 |
| 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 | DIP28,.6 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 2V |
| Supply Voltage-Nom | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| 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 MCP23016-I/SP datasheet?
MCP23016-I/SP Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP23016-I/SP?
Compatible alternatives and drop-in replacements for MCP23016-I/SP:
Frequently Asked Questions
How many MCP23016-I/SP devices can share a single I2C bus, and what total GPIO count does that provide?
Up to 8 MCP23016 devices can share one I2C bus using the 3 hardware address pins (A0–A2). With 16 I/O lines per device, 8 devices together provide 128 additional GPIO lines, all controlled via the 2-wire I2C interface at up to 400 kHz without consuming additional MCU pins.
For a keyboard scanner design, how does the MCP23016-I/SP's interrupt-on-change feature reduce MCU overhead?
The MCP23016 generates an active-low interrupt signal on its INT pin whenever any monitored input changes state, so the host MCU can remain in a low-power sleep mode between keystrokes. This avoids continuous polling of the I2C bus at 400 kHz and allows the MCU to wake only when an actual key press or release occurs, reducing average current consumption significantly in battery-powered panels.
Is the MCP23016-I/SP backward compatible with systems designed around the newer MCP23017?
The MCP23016 and MCP23017 are both 16-bit I2C I/O expanders with similar register maps, but the MCP23017 adds separate INTA and INTB interrupt pins per 8-bit port, supports 1.7 V I2C fast-mode plus (where compatible), and has a different I2C base address. Software porting between the two requires register map review, but they share the 28-pin DIP footprint, making hardware substitution straightforward for 5 V designs.
What output drive current can the MCP23016-I/SP supply per GPIO pin for driving LEDs directly?
Each output of the MCP23016 can source or sink up to 25 mA, with a total per-port limit of 125 mA for GP0 and GP1 respectively. This allows direct connection of standard 20 mA indicator LEDs with a series current-limiting resistor (typically 100 Ω to 220 Ω at 3.3 V or 5 V supply) without needing external driver transistors for small LED arrays.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 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.
More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.2400 | $2.24 |
| 15+ | $1.7870 | $26.80 |
| 100+ | $1.6900 | $169.00 |
| 1000+ | $1.6500 | $1650.00 |
| 5000+ | $1.6300 | $8150.00 |
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.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit