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MCP23017T-E/ML
QFN-28 (6x6mm)
The MCP23017T-E/ML from Microchip is a 16-bit I2C I/O expander with 1.7MHz bus speed, interrupt output, and 3 address pins in QFN-28 surface-mount for GPIO expansion.
| Package | QFN-28 (6x6mm) |
The MCP23017T-E/ML from Microchip is a 16-bit I2C I/O expander with 1.7MHz bus speed, interrupt output, and 3 address pins in QFN-28 surface-mount for GPIO expansion.
The MCP23017T-E/ML is a 16-bit I2C I/O expander from Microchip in QFN-28 (4x4mm), providing 16 bidirectional GPIO pins via an I2C interface at up to 1.7MHz (high-speed mode). The 16 I/O pins are split into two 8-bit ports (Port A and Port B), each with its own configuration, input, output, and polarity registers. The IODIRA and IODIRB registers set each pin as input (1) or output (0). The OLATA/OLATB registers set output latch values. The GPIOA/GPIOB registers read current pin states. The IPOLA/IPOLB registers can invert the polarity of input pins. Each pin has an internal weak pull-up resistor (100kOhm) configurable via GPPUA/GPPUB. The interrupt-on-change feature: the INTCONA/INTCONB registers configure whether interrupts are generated on any change or only when a pin differs from a reference value (DEFVALA/DEFVALB). The INTA and INTB output pins can be configured as active-high, active-low, or open-drain, and can mirror each other or operate independently. The three address pins (A0-A2) allow up to 8 MCP23017 devices on one I2C bus, providing 128 I/O channels. The QFN-28 package is 70% smaller than the DIP-28, critical for space-constrained designs.
| Pin | Name | Type | Function |
|---|---|---|---|
| 1-8 | GPB0-GPB7 | I/O | Port B GPIO (bits 0-7) |
| 9 | VSS | Power | Ground |
| 10 | SCK | Input | SPI clock (active in SPI mode) |
| 11 | CS | Input | SPI chip select (active low) |
| 12 | SDI | Input | SPI data in (MOSI) |
| 13 | SDO | Output | SPI data out (MISO) |
| 14-15 | NC | – | No connect |
| 16-23 | GPA0-GPA7 | I/O | Port A GPIO (bits 0-7) |
| 24-28 | INTB/INTA/A0-A2/VDD | Output/Input/Power | Interrupt outputs, address select, supply (1.8-5.5V) |
| Manufacturer | Part Number | Package | Notes |
|---|---|---|---|
| Microchip | MCP23017-E/SP | DIP-28 | Same device, DIP package for prototyping |
| NXP | PCA8575DB | SSOP-24 | 16-bit I2C I/O expander alternative |
| Texas Instruments | TCA9555DBQR | SSOP-24 | 16-bit I2C expander, 400kHz |
| Microchip | MCP23S17T-E/ML | QFN-28 | SPI version of same device |
| Silicon Labs | CP2112-A01-GMR | QFN-24 | USB to I2C bridge + GPIO |
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
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