PIC32MM0256GPM028-E/M6 - 25MHz 32-bit MCU w/256KB Flash | Microchip
MPN: PIC32MM0256GPM028-E/M6 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.92 | $3.92 |
| 10 | $3.55 | $35.50 |
| 100 | $3.05 | $305.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.3 | $2,300.00 |
PIC32MM0256GPM028-E/M6 Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals. The 32-bit MCU class extends 8/16-bit devices with higher compute throughput, larger addressable memory, richer DSP support, and modern peripherals such as USB, CAN, and capacitive touch sensing. PIC32MM GPM sits within Microchip's PIC32 portfolio as the lowest-power, most cost-effective branch, hierarchically: 32-bit MCU -> ARM/MIPS architecture -> PIC32 family -> PIC32MM GPM sub-family.
Key features include a USB 2.0 Full-Speed Device/Host/OTG controller, 4-channel DMA, Configurable Logic Cell (CLC), 12-bit ADC, 10-bit DAC, multiple PWM/SCCP/MCCP timers, RTCC, I2C, SPI, UART, and 21 general-purpose I/O pins. Hardware ECC on Flash and RAM provides enhanced reliability for safety-conscious designs, while a 4-wire programming/debug interface (PGDx/PGECx) enables MPLAB X IDE and ICD support.
The device uses Microchip's proprietary microMIPS ISA option to balance code density and throughput, with the MIPS32 microAptiv core providing deterministic interrupt latency. Internal LDO and a flexible 2.0V-3.6V supply range support single-cell Li-ion or 3.3V regulated rails, with multiple low-power modes (Sleep, Deep Sleep, Deep Sleep with RTCC) achieving deep-sleep currents in the low microamp range.
Typical applications include consumer USB HID devices such as mice and game controllers, IoT sensor nodes, low-power wearables, smart home peripherals, battery-powered medical monitors, and industrial HMI panels. The combination of USB, large memory, and ultra-low sleep current is uniquely suited to tethered or intermittently connected products.
When designing with this device, place the 4x4 UQFN land pattern with proper thermal vias under the exposed pad, route the USB DP/DM pair as a 90-ohm differential with controlled impedance, and follow Microchip's MPLAB Harmony framework for peripheral drivers. Note the -E/M6 suffix denotes the -40C to +125C extended temperature grade and UQFN-28 package; -I/M6 (industrial -40C to +85C) is also available for less demanding environments.
This page synthesizes distributor pricing, drop-in same-package alternatives within the PIC32MM GPM family, and practical low-power design guidance not consolidated on the manufacturer datasheet.
Drop-in alternatives for PIC32MM0256GPM028-E/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 PIC32MM0256GPM028-E/M6 (same form factor and footprint) — differing in Core Architecture, Package, MSL Level, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MM0256GPM028-I/M6
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC32MM0064GPM028T-I/M6
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC32MM0032GPL028-E/M6
✅ Drop-In✓ In Stock
$0.656 / Unit
View Datasheet →PIC32MM0128GPM028T-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.18 / Unit
View Datasheet →PIC32MM0256GPM028-E/M6 Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 microAptiv (microMIPS capable) |
| Maximum CPU Clock | 25 MHz |
| CoreMark Performance | 79 CoreMark |
| Program Flash | 256 KB (256K x 8) with ECC |
| SRAM | 32 KB (32K x 8) |
| Supply Voltage | 2.0 V to 3.6 V |
| Operating Temperature | -40 C to +125 C (extended grade) |
| Package | 28-UQFN (4x4 mm) with exposed pad |
| I/O Pins | 21 |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| DMA Channels | 4 |
| Communication | I2C, SPI, UART, USB |
| Configurable Logic Cell (CLC) | Yes |
| Real-Time Clock Calendar (RTCC) | Yes |
| Programming/Debug | 4-wire ICSP (PGDx/PGECx) |
| RoHS Compliance | Compliant |
| Mounting Type | Surface Mount |
PIC32MM0256GPM028-E/M6 Pin Configuration
| Pin 1 | VDD — Core voltage supply (2.0V-3.6V) |
| Pin 2 | OSC1/RA0 — Crystal oscillator input or GPIO |
| Pin 3 | OSC2/RA1 — Crystal oscillator output or GPIO |
| Pin 4 | PGED1/RB0 — Programming data and GPIO |
| Pin 5 | PGEC1/RB1 — Programming clock and GPIO |
| Pin 6 | VSS — Ground |
| Pin 7 | VBUS — USB VBUS detect input |
| Pin 8 | D-/RB10 — USB D- data line / GPIO |
| Pin 9 | D+/RB11 — USB D+ data line / GPIO |
| Pin 10 | RB12 — GPIO / peripheral function |
| Pin 11 | RB13 — GPIO / peripheral function |
| Pin 12 | RB14 — GPIO / peripheral function |
| Pin 13 | RB15 — GPIO / peripheral function |
| Pin 14 | RA2 — GPIO / peripheral function |
| Pin 15 | RA3 — GPIO / peripheral function |
| Pin 16 | RA4 — GPIO / peripheral function |
| Pin 17 | RA5 — GPIO / peripheral function |
| Pin 18 | VSS — Ground |
| Pin 19 | RA6 — GPIO / peripheral function |
| Pin 20 | RA7 — GPIO / peripheral function |
| Pin 21 | RC0 — GPIO / peripheral function |
| Pin 22 | RC1 — GPIO / peripheral function |
| Pin 23 | RC2 — GPIO / peripheral function |
| Pin 24 | RC3 — GPIO / peripheral function |
| Pin 25 | RC4 — GPIO / peripheral function |
| Pin 26 | RC5 — GPIO / peripheral function |
| Pin 27 | RC6 — GPIO / peripheral function |
| Pin 28 | EP — Exposed pad, must be soldered to ground |
Typical Applications
PIC32MM0256GPM028-E/M6 is suitable for 6 applications: USB HID Consumer Devices, IoT Sensor Nodes, Battery-Powered Wearables, Industrial HMI Panels, Smart Home Peripherals, Portable Medical Monitors.
USB HID Consumer Devices
The PIC32MM0256GPM028-E/M6 is purpose-built for USB HID devices such as mice, keyboards, game controllers, and presentation remotes, where its integrated USB 2.0 Full-Speed Device controller and 256KB ECC Flash host HID class drivers plus vendor-specific descriptors. The MIPS32 microAptiv core at 25 MHz executes USB 1-ms polling without CPU loading, while deep-sleep currents in the low-microamp range enable battery-powered operation for over a year on two AAA cells. Hardware ECC on Flash prevents bit-flip-induced descriptor corruption that could otherwise disconnect the device from the host. Place 22-ohm series resistors and ESD protection on DP/DM lines per USB 2.0 specification.
Recommended
IoT Sensor Nodes
The PIC32MM0256GPM028-E/M6 fits IoT sensor nodes thanks to its deep-sleep current in the low-microamp range, integrated 12-bit ADC for sensor readout, 10-bit DAC for bias generation, and Configurable Logic Cell (CLC) for hardware-level event filtering without CPU wake. Its 32KB SRAM supports small TLS buffers or RTOS work areas, while 256KB Flash accommodates MPLAB Harmony stacks and over-the-air update bootloaders. The 28-UQFN 4x4 mm package keeps the BOM footprint compact for coin-cell or energy-harvesting nodes, and the extended -40C to +125C temperature grade supports outdoor deployments.
Recommended
Battery-Powered Wearables
Wearables such as fitness bands, smartwatches, and medical patches benefit from the PIC32MM0256GPM028-E/M6's eXtreme low-power modes, where Deep Sleep with RTCC draws only a few microamps while maintaining wall-clock time. The integrated 12-bit ADC reads heart-rate, SpO2, or motion sensor analog outputs, while DMA transfers data without CPU wake to extend battery life. The 21 GPIOs multiplex SPI/I2C/UART for connecting Bluetooth Low Energy modules or OLED displays, and the 28-UQFN (4x4 mm) package fits wrist-band form factors with minimum PCB real estate.
Recommended
Industrial HMI Panels
Industrial human-machine interface (HMI) panels use the PIC32MM0256GPM028-E/M6 to drive segmented LCD, capacitive touch buttons via the CTMU peripheral, and USB-based firmware provisioning. The 79 CoreMark performance handles Modbus RTU over UART, 4-20 mA sensor input via the 12-bit ADC, and operator button matrix scanning without timing violations. The -40C to +125C extended temperature grade is essential for factory-floor enclosures near motors or heaters. Hardware ECC Flash prevents corrupted control logic from causing machine downtime or safety incidents.
Recommended
Smart Home Peripherals
Smart home devices including connected light switches, occupancy sensors, and door/window contact modules leverage the PIC32MM0256GPM028-E/M6's USB Device capability for phone-app commissioning, deep-sleep operation for multi-year coin-cell life, and CLC peripheral for hardware motion-trigger logic that wakes the CPU only on relevant events. The microAptiv core runs Zigbee or Thread stack via companion radio modules over SPI/UART, while the 256KB Flash accommodates future Matter-over-Thread firmware updates. Surface-mount 28-UQFN allows compact in-wall box installations.
Recommended
Portable Medical Monitors
Portable medical monitors such as pulse oximeters, glucose meters, and patient-worn telemetry devices rely on the PIC32MM0256GPM028-E/M6 for FDA-class-II product platforms where the hardware ECC Flash prevents bit-flip-induced measurement errors that could trigger false alarms. The 10/12-bit ADC reads sensor front-ends with sufficient resolution, while the integrated USB port enables charging and data upload to clinician systems. Deep-sleep currents under 10 uA extend battery life, and the extended temperature grade supports ambulance and outdoor use.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MM0256GPM028-E/M6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MM0256GPM028-I/M6 | PIC32MM0064GPM028T-I/M6 | PIC32MM0032GPL028-E/M6 | PIC32MM0128GPM028T-I/ML |
|---|---|---|---|---|---|
| Package | 28-UQFN (4x4) | 28-UQFN (4x4) | 28-UQFN (4x4) | 28-UQFN (4x4) | 28-UQFN (4x4) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | MIPS32 microAptiv 25 MHz | MIPS32 microAptiv 25 MHz | MIPS32 microAptiv 25 MHz | MIPS32 microAptiv 25 MHz (GPL sub-family) | MIPS32 microAptiv 25 MHz |
| Flash | 256 KB | 256 KB | 64 KB | 32 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 8 KB | 8 KB | 16 KB |
| USB | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | No USB (GPL sub-family) | USB 2.0 FS Device/Host/OTG |
| Temperature Grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) |
| Approx. Unit Price (qty 100) | $3.05 | $2.85 | $2.45 | $2.10 | $2.65 |
Key Differentiators
- Lowest-power 32-bit MCU with USB and ECC Flash in UQFN-28 (vs PIC32MX270F256D-I/PT)
- Extended temperature grade in same footprint (vs PIC32MM0256GPM028-I/M6)
- Hardware ECC on Flash and RAM (vs PIC32MM0032GPL028-E/M6)
Design Notes
Estimated: The 28-UQFN 4x4 mm exposed pad (EP) must be soldered to a continuous ground copper pour with a grid of thermal vias (typically 0.3 mm holes, 0.5 mm pitch, 4-9 vias) to dissipate USB transceiver heat and provide low-impedance ground return. Decoupling: place a 100 nF X7R capacitor within 2 mm of each VDD pin and a bulk 4.7 uF X5R on the main 3V3 rail. USB DP/DM lines should be routed as a 90-ohm differential with matched length within 150 mils.
Estimated: To minimize deep-sleep current, disable unused peripherals via PMD registers before entering Sleep, retain only RTCC if a wake-up timestamp is needed. Typical deep-sleep current with RTCC running is on the order of a few microamps (refer to datasheet DC characteristics table). USB transceiver draws ~1 mA during active enumeration; disable USBEN before Sleep if USB is not required. Use the internal LDO (set via CONFIG bits) to avoid external voltage regulator quiescent losses in battery designs.
Do not confuse -E (extended -40C to +125C) with -I (industrial -40C to +85C) suffixes when ordering; substituting -I in an outdoor enclosure will fail thermal stress tests. The 'M6' suffix denotes the 28-UQFN 4x4 package; 'SS' and 'SP' suffixes denote SSOP-28 and SPDIP-28 respectively with different pinouts. Always verify the CONFIG word programming matches the application: oscillator selection (FRC vs POSC), WDT enable, and code-protect bits are common sources of bricked boards.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - this is an industrial/consumer MCU, not an automotive grade part; contact Microchip for PIC32 AEC-Q100 versions.
