PIC32MM0256GPM028T-I/M6 - 256KB Flash 32-bit MCU | Microchip
MPN: PIC32MM0256GPM028T-I/M6 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.62 | $3.62 |
| 10 | $3.26 | $32.60 |
| 100 | $2.79 | $279.00 |
| 500 | $2.42 | $1,210.00 |
| 1,000 | $2.1 | $2,100.00 |
PIC32MM0256GPM028T-I/M6 Overview
A 32-bit microcontroller (MCU) is an integrated circuit that combines a 32-bit CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals on a single silicon die. The PIC32MM GPM series sits in Microchip's MCU hierarchy as: PIC32MM -> 32-bit PIC family -> Microcontroller -> Microprocessor unit -> Semiconductor. These MCUs are commonly used to replace 8-bit PIC16/PIC18 designs where more compute, larger memory, and modern peripherals are required while preserving Microchip's MPLAB X toolchain.
Key features of this part include 256KB Flash with ECC for safe code storage, 32KB SRAM for data and stack, USB 2.0 full-speed device, multiple low-power sleep modes down to 650 nA, 4-channel DMA, 12-bit 200 ksps ADC, and configurable logic cells. It operates from 2.0V to 3.6V with built-in voltage regulators and brown-out reset, providing robust operation across battery and USB-powered scenarios. The 28-UQFN 4x4 mm form factor targets space-constrained handheld and wearable designs.
Technically, the device uses the MIPS32 microAptiv core with microMIPS instruction support, achieving up to 79 CoreMark at 25 MHz while drawing only a few mA active. The integrated ECC on Flash improves reliability in industrial and automotive edge applications by detecting and correcting single-bit memory faults without CPU intervention. The 28-UQFN exposed pad enables efficient PCB thermal dissipation for the small package.
Typical applications include low-power IoT sensor nodes, USB HID peripherals, wearable fitness devices, battery-powered instrumentation, and consumer HMI panels. The combination of USB, ECC, and sub-microamp sleep makes it a strong fit for always-on battery-powered designs that occasionally need to communicate over USB.
When designing with this part, ensure the USB DP/DM traces are 90 ohm differential and the VBUS pin sees 5V tolerant input. The exposed pad must be soldered to the ground plane for thermal performance and electrical reference. Use the MPLAB Harmony Configurator (MHC) for clock, peripheral, and pin setup to avoid silicon errata.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the bare manufacturer datasheet, helping engineers select the right low-power PIC32 for USB-connected and battery-powered products.
Drop-in alternatives for PIC32MM0256GPM028T-I/M6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC32MM0256GPM028T-I/M6 (same form factor and footprint) — differing in Program Memory (Flash), Operating Temperature, Core Architecture, Package, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MM0128GPM028T-I/ML
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC32MM0064GPM028T-I/M6
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC32MM0256GPM028-E/ML
✅ Drop-In✓ In Stock
$2.48 / Unit
View Datasheet →PIC32MM0256GPM028-I/M6
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC32MM0128GPM028T-I/M2
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MM0256GPM028T-I/M6 Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 microAptiv |
| Core Width | 32-bit |
| Maximum Core Frequency | 25 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Flash ECC | Yes (single-bit correction) |
| SRAM | 32 KB |
| Operating Voltage | 2.0 V to 3.6 V |
| USB | USB 2.0 Full-Speed Device |
| ADC | 12-bit, up to 200 ksps |
| DMA Channels | 4 |
| Sleep Current (Deep Sleep) | 650 nA typical |
| Configurable Logic Cells (CLC) | Yes |
| Package | 28-pin UQFN (4x4 mm) with Exposed Pad |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC32MM0256GPM028T-I/M6 Pin Configuration
| Pin 1 | RB9 — Port B bit 9 / SDA2 |
| Pin 2 | RB8 — Port B bit 8 / SCL2 |
| Pin 3 | RB7 — Port B bit 7 |
| Pin 4 | RB6 — Port B bit 6 |
| Pin 5 | RA0 — Port A bit 0 |
| Pin 6 | RA1 — Port A bit 1 |
| Pin 7 | RB0 — Port B bit 0 |
| Pin 8 | RB1 — Port B bit 1 |
| Pin 9 | RB2 — Port B bit 2 |
| Pin 10 | RB3 — Port B bit 3 |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | RA2 — Port A bit 2 |
| Pin 14 | RA3 — Port A bit 3 |
| Pin 15 | RA4 — Port A bit 4 |
| Pin 16 | AVDD — Analog positive supply |
| Pin 17 | AVSS — Analog ground |
| Pin 18 | VBUS — USB VBUS detect (5V tolerant) |
| Pin 19 | D- — USB differential minus |
| Pin 20 | D+ — USB differential plus |
| Pin 21 | RA5 — Port A bit 5 |
| Pin 22 | RA6 — Port A bit 6 |
| Pin 23 | RC0 — Port C bit 0 |
| Pin 24 | RC1 — Port C bit 1 |
| Pin 25 | RC2 — Port C bit 2 |
| Pin 26 | RC3 — Port C bit 3 |
| Pin 27 | OSCI — Oscillator input |
| Pin 28 | OSCO — Oscillator output |
Typical Applications
PIC32MM0256GPM028T-I/M6 is suitable for 7 applications: USB HID Peripheral Dongles, Battery-Powered IoT Sensor Nodes, Wearable Fitness and Health Devices, Consumer HMI Touch Panels, Industrial Edge Sensor Hubs, Smart Home Edge Devices, Portable Test and Measurement Instruments.
USB HID Peripheral Dongles
The PIC32MM0256GPM028T-I/M6 is well suited for USB HID peripherals such as keyboards, mice, custom input devices, and HID-based configuration tools. Its integrated USB 2.0 Full-Speed device controller with on-chip transceiver eliminates external USB PHY chips, reducing BOM cost and PCB area. With 256 KB Flash it can store rich HID report descriptors, vendor-specific HID usages, and multi-language firmware, while 32 KB SRAM comfortably handles USB endpoint buffers plus application state. The 28-UQFN 4x4 mm package fits inside compact dongle enclosures, and the 650 nA deep-sleep mode supports bus-powered suspend/resume scenarios mandated by the USB specification.
Recommended
Battery-Powered IoT Sensor Nodes
For battery-powered IoT sensor nodes, the PIC32MM0256GPM028T-I/M6 delivers industry-leading deep-sleep current of 650 nA with full RAM retention, enabling multi-year coin-cell operation. The 256 KB Flash with ECC allows robust OTA firmware update storage with bit-error correction, and the 12-bit 200 ksps ADC handles environmental sensors such as temperature, humidity, and gas sensors with sufficient resolution. The 4-channel DMA offloads sensor data movement from the CPU, letting the core stay in sleep longer between bursts. Wide 2.0V-3.6V supply range supports direct Li-coin or 2xAA battery operation without LDO loss.
Recommended
Wearable Fitness and Health Devices
Wearable fitness bands and health monitors benefit from the PIC32MM0256GPM028T-I/M6 combination of small 4x4 mm UQFN footprint, low active current, and sub-microamp sleep current. The 256 KB Flash can host BLE-via-SPI stacks, sensor fusion algorithms, and display drivers, while 32 KB SRAM holds rolling buffers for accelerometer and heart-rate data. Configurable Logic Cells (CLC) implement custom hardware glue between sensors without external gates, saving board area. The -40 C to +85 C industrial temperature range supports skin-contact and outdoor use cases.
Recommended
Consumer HMI Touch Panels
Consumer human-machine interface (HMI) panels with capacitive touch and small TFT displays can use the PIC32MM0256GPM028T-I/M6 as a cost-effective main controller. The 25 MHz MIPS32 microAptiv core drives simple graphical menus, the 12-bit ADC reads slider and rotary sensors, and the CLC peripherals handle capacitive touch timing without software overhead. The 256 KB Flash accommodates font tables and multi-language strings, while 32 KB SRAM provides double-buffered frame regions for small color TFTs.
Recommended
Industrial Edge Sensor Hubs
Industrial edge sensor hubs can leverage the PIC32MM0256GPM028T-I/M6 for its ECC Flash and robust -40 C to +85 C operation, ensuring reliability in factory environments. The USB device port enables quick field configuration via laptop, while the 12-bit ADC and CLC blocks provide local signal conditioning. The 4-channel DMA supports continuous ADC-to-memory streams without CPU intervention, freeing the core for protocol conversion to downstream fieldbus. The small UQFN package fits inside sealed IP65 sensor housings.
Recommended
Smart Home Edge Devices
Smart home edge controllers for lighting, motorized blinds, and HVAC nodes benefit from the PIC32MM0256GPM028T-I/M6 low-power profile and USB host-friendly suspend behavior. The 256 KB Flash can hold Zigbee or LoRa protocol stacks over SPI, the 12-bit ADC reads analog sensors like photodiodes and thermistors, and the configurable logic cells implement zero-crossing detection for TRIAC-driven dimmers. The industrial temperature range supports attic and outdoor junction boxes, and the small UQFN package fits inside flush-mount wall modules.
Recommended
Portable Test and Measurement Instruments
Handheld multimeters, continuity testers, and signal generators can use the PIC32MM0256GPM028T-I/M6 as a low-power display-and-button controller with USB charging. The integrated USB device supports both battery charging via VBUS and data logging to PC, reducing connector count. The 12-bit ADC at 200 ksps provides local measurement capability for low-frequency signals, while the 256 KB Flash holds calibration tables and UI assets. The 650 nA sleep current allows standby shelf-life exceeding two years on standard AAA batteries.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MM0256GPM028T-I/M6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MM0128GPM028T-I/ML | PIC32MM0064GPM028T-I/M6 | PIC32MM0256GPM028-E/ML | PIC32MM0256GPM028-I/M6 |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (4x4) | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same |
| Flash Memory | 256 KB | 128 KB | 64 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 16 KB | 8 KB | 32 KB | 32 KB |
| Core Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Operating Voltage | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V |
| USB | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C |
| Deep Sleep Current | 650 nA | 650 nA | 650 nA | 650 nA | 650 nA |
| Unit Price (qty 1) | $3.62 | $3.10 | $2.55 | $4.10 | $3.62 |
Key Differentiators
- Maximum Flash in 28-UQFN USB-equipped PIC32MM family (vs PIC32MM0064GPM028T-I/M6)
- Sub-microamp deep sleep with full RAM retention (vs PIC32MK0256MCJ064T)
- Integrated USB 2.0 device without external PHY (vs Generic Cortex-M0 MCU without USB)
Design Notes
The PIC32MM0256GPM028T-I/M6 supports multiple low-power modes. Use Deep Sleep with RTCC for periodic wake events drawing only 650 nA. For USB bus-powered designs, ensure VBUS detection enables the regulator and oscillator within 100 ms of attach per USB 2.0 specification. Decouple VDD with 100 nF and 4.7 uF ceramic caps placed within 3 mm of the pin.
Route USB DP and DM as a 90 ohm differential pair with length matching within 2 mm. Place the 15 kB pull-down on D- and 1.5 kB pull-up on D+ (D+ pulled up after VBUS detected) close to the MCU. The exposed thermal pad must be soldered to a continuous ground copper pour of at least 25 mm squared for thermal dissipation.
Do not skip the configuration of the FPLLEN bit before switching to high-performance PLL mode, or the core may execute from a wrong clock and crash. The Configuration Words must be set with proper WDT, BOR, and code-protect bits per application needs. Always reference the latest silicon errata DS80000716 before locking the design for the PIC32MM GPM family.
Place the 32.768 kHz crystal within 5 mm of OSCI/OSCO with short traces and guard ground. Avoid routing high-frequency signals under the crystal traces. The analog AVSS and AVSS pins must connect to a clean ground island with a single-point tie to the main digital ground near the MCU to avoid digital switching noise coupling into ADC measurements.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified; for automotive applications consider PIC32MM automotive AEC-Q100 equivalent variants if available.
