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.
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| Qty. | Unit Price | Ext. Price |
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| 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 |
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