PIC32MM0128GPM028-I/SS - 32-bit 25MHz 128KB Flash MCU | Microchip
MPN: PIC32MM0128GPM028-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.05 | $2.05 |
| 10 | $1.84 | $18.40 |
| 100 | $1.62 | $162.00 |
| 500 | $1.42 | $710.00 |
| 1,000 | $1.25 | $1,250.00 |
| 3,000 | $1.08 | $3,240.00 |
PIC32MM0128GPM028-I/SS Overview
A 32-bit microcontroller (MCU) is a programmable processor that combines a CPU, memory, and programmable peripherals on a single silicon die. The PIC32MM GPM family extends Microchip's PIC32 portfolio by adding USB device support and ECC memory protection to a low-power microAptiv core, sitting in the wider hierarchy of PIC32 -> MIPS32 -> 32-bit MCU -> embedded processor. The microAptiv core supports the microMIPS instruction set, enabling a 30% smaller code footprint than MIPS32-only code while retaining full 32-bit performance.
Key features include 128KB of ECC Flash with single-cycle Flash read, 16KB SRAM, 4 DMA channels, 3 analog comparators, 3 PWM outputs, 21 timers, and a 12-bit ADC. The GPM suffix indicates USB 2.0 Full-Speed device support, ideal for connected low-power designs. Sleep currents are claimed at microampere-class levels, enabling battery-powered applications that must run for months or years.
The device integrates a precision 8MHz internal RC oscillator that can be used as a primary clock without external crystals, reducing BOM cost. Boundary scan (JTAG) support simplifies board-level test, while a hardware crypto engine is available in selected family members. The 28-SSOP package is a wide-body shrink-SOIC footprint that supports both hand-soldering and standard reflow.
Typical applications include low-power USB human-interface devices, sensor hubs with USB diagnostics, industrial control panels, consumer appliances with touch/keyboard input, and portable medical accessories. The combination of ECC Flash and USB device makes the part a strong fit for connected products that must meet IEC 60730 or similar functional-safety requirements.
When designing with this MCU, ensure VDD decoupling follows Microchip's recommended 100nF plus 1uF-10uF bulk capacitor topology near the supply pins. The USB DP/DM traces must be 90 ohm differential and length-matched within 150 mil to keep the eye diagram compliant with USB 2.0 Full-Speed.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC32MM0128GPM028-I/SS — 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 PIC32MM0128GPM028-I/SS (same form factor and footprint) — differing in Package, ADC, USB, Core, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MM0064GPM028-I/SS
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC32MM0128GPM028-E/SS
✅ Drop-In✓ In Stock
$2.16 / Unit
View Datasheet →PIC32MM0032GPL028-I/SO
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC32MM0016GPL028-I/SS
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC32MM0128GPM028-I/SS Maximum Ratings & Electrical Characteristics
| Core Processor | MIPS32 microAptiv |
| Core Size | 32-bit |
| Maximum CPU Speed | 25 MHz |
| Program Memory Type | Flash (with ECC) |
| Program Memory Size | 128 KB (128K x 8) |
| RAM Size | 16 KB |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 28-SSOP (0.209", 5.30mm width) |
| DMA Channels | 4 |
| Timers | 21 |
| PWM Outputs | 3 |
| Analog Comparators | 3 |
| USB | USB 2.0 Full-Speed Device |
| Connectivity | USB, I2C, SPI, UART |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead Free | Yes |
PIC32MM0128GPM028-I/SS Pin Configuration
| Pin 1 | RA0 — Port A bit 0 / analog input |
| Pin 2 | RA1 — Port A bit 1 / analog input |
| Pin 3 | RA2 — Port A bit 2 / analog input |
| Pin 4 | RA3 — Port A bit 3 / analog input / VREF+ |
| Pin 5 | VDD — Positive supply voltage |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RA4 — Port A bit 4 / analog input |
| Pin 8 | RA5 — Port A bit 5 / analog input |
| Pin 9 | RA6 — Port A bit 6 / oscillator output |
| Pin 10 | RA7 — Port A bit 7 / oscillator input |
| Pin 11 | RB0 — Port B bit 0 / programming pin |
| Pin 12 | RB1 — Port B bit 1 / analog input |
| Pin 13 | RB2 — Port B bit 2 / analog input |
| Pin 14 | RB3 — Port B bit 3 / analog input |
| Pin 15 | RB4 — Port B bit 4 / SDA1 |
| Pin 16 | RB5 — Port B bit 5 / SCL1 |
| Pin 17 | RB6 — Port B bit 6 / SCL2 |
| Pin 18 | RB7 — Port B bit 7 / SDA2 |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RC0 — Port C bit 0 |
| Pin 22 | RC1 — Port C bit 1 |
| Pin 23 | RC2 — Port C bit 2 |
| Pin 24 | RC3 — Port C bit 3 |
| Pin 25 | RC4 — Port C bit 4 / USB D- |
| Pin 26 | RC5 — Port C bit 5 / USB D+ |
| Pin 27 | RC6 — Port C bit 6 |
| Pin 28 | RC7 — Port C bit 7 |
Typical Applications
PIC32MM0128GPM028-I/SS is suitable for 6 applications: USB Human Interface Devices (HID), Sensor Hub with USB Diagnostics, Industrial Control Panels, Portable Medical Accessories, Consumer Appliance Front Panels, Connected Battery-Powered IoT End Nodes.
USB Human Interface Devices (HID)
The PIC32MM0128GPM028-I/SS is well suited for low-power USB HID devices such as keyboards, mice, and game controllers. With its integrated USB 2.0 Full-Speed device peripheral and 128KB of ECC Flash, the part can host the USB HID stack plus application firmware without an external PHY. The microAptiv core's microMIPS mode compresses the HID descriptor and HID report-handling code, leaving room for vendor-specific extensions. Its 16KB SRAM is sufficient for HID report buffers and debounce tables. Battery-powered wireless-HID dongles benefit from the part's microamp-class suspend current, enabling months of standby life from a coin cell or AA pack.
Recommended
Sensor Hub with USB Diagnostics
The PIC32MM0128GPM028-I/SS serves as a USB-attached sensor hub, aggregating data from I2C/SPI environmental sensors and streaming it over USB CDC or vendor-class interfaces. The 21 timers trigger periodic sensor sampling, the 4 DMA channels move sensor data between peripherals and SRAM without CPU intervention, and the 3 comparators enable hardware threshold detection for alarms. The 128KB ECC Flash stores sensor calibration tables and USB stack, while ECC is critical for IEC 60730 functional-safety in domestic appliance sensor hubs. USB Full-Speed bandwidth (12 Mbps) is more than enough for typical multi-sensor telemetry.
Recommended
Industrial Control Panels
The PIC32MM0128GPM028-I/SS fits industrial control panel designs that need USB for firmware updates, configuration via vendor-class commands, or PC-side diagnostics. Its 32-bit microAptiv core at 25MHz executes control loops fast enough for panel-meter and machine-interface timing, while the 3 PWM outputs drive indicator LEDs or buzzer tones. The industrial -40C to +85C temperature grade ensures reliable operation on shop floors and outdoor enclosures. The 28-SSOP package is hand-solderable for prototypes and supports lead-free reflow profiles for volume assembly. ECC memory helps meet IEC 60730 functional-safety requirements for white-goods and HVAC panels.
Recommended
Portable Medical Accessories
The PIC32MM0128GPM028-I/SS supports portable medical accessory designs that must meet IEC 60601-1 functional-safety expectations. Its ECC Flash prevents undetected bit errors from corrupting firmware execution, a key requirement for medical device certification. The microAptiv core's deterministic interrupt latency ensures predictable response to sensor events such as pulse-oximetry or glucose-meter readings. USB Full-Speed connectivity enables charger cables that double as data cables for uploading readings to a clinician's portal. The 16KB SRAM holds session buffers without needing external memory, while microamp sleep currents extend battery life across weeks of standby.
Recommended
Consumer Appliance Front Panels
The PIC32MM0128GPM028-I/SS drives consumer-appliance front panels with touch, rotary encoder, and LED indicator inputs. Its microMIPS mode cuts code size so that the 128KB Flash holds the user-interface state machine plus USB service-port stack for firmware upgrades. Boundary-scan (JTAG) support simplifies board-level test in volume manufacturing. The 4 DMA channels move LED PWM update data without CPU load, freeing the microAptiv core to handle touch decoding in real time. The 28-SSOP industrial-temperature package fits behind display modules and operates reliably across kitchen-temperature swings. ECC Flash satisfies IEC 60730 Class B requirements for unattended appliances.
Recommended
Connected Battery-Powered IoT End Nodes
The PIC32MM0128GPM028-I/SS is a strong fit for battery-powered IoT end nodes that periodically wake, take a measurement, and return to microamp sleep. The microAptiv core's deep-sleep modes draw only microampere-class current, while the 128KB ECC Flash stores over-the-air firmware-update images and signed bootloader logic. USB device connectivity allows a USB cable to inject new firmware from a phone or laptop, removing the need for a separate programming header. The 21 timers support RTC wakeup, watchdog, and pulse-counting tasks without external components. The 28-SSOP industrial-temperature package operates across outdoor weather cycles.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MM0128GPM028-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MM0064GPM028-I/SS | PIC32MM0128GPM028-E/SS | PIC32MM0032GPL028-I/SO | PIC32MM0016GPL028-I/SS |
|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP (same) | 28-SSOP (same) | 28-SOIC (wider body) | 28-SSOP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Size | 128 KB | 64 KB | 128 KB | 32 KB | 16 KB |
| RAM Size | 16 KB | 16 KB | 16 KB | 8 KB | 4 KB |
| Core Speed | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| USB Peripheral | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | No USB (GPL family) | No USB (GPL family) |
| ECC Flash | Yes (single-bit correct, dual-bit detect) | Yes | Yes | Yes | Yes |
| Approx. Unit Price (USD, qty-100) | $1.62 | lower (64KB Flash) | higher (extended temp) | lower (32KB Flash) | lowest (16KB Flash) |
Key Differentiators
- Pin-to-pin upgrade/downgrade within PIC32MM GPM family (vs PIC32MM0064GPM028-I/SS)
- Industrial temperature grade matches commercial/indoor designs (vs PIC32MM0128GPM028-E/SS)
- Full USB 2.0 Full-Speed device support in 28-SSOP (vs PIC32MM0032GPL028-I/SO)
Design Notes
Place a 100nF ceramic decoupling capacitor as close as possible to each VDD/VSS pin pair on the PIC32MM0128GPM028-I/SS, plus one bulk 1uF-10uF capacitor per supply node. Keep VDD traces short and wide to minimize inductance. The USB DP/DM differential pair must be 90 ohm +/-10% impedance, length-matched within 150 mil, and routed away from noisy switching traces to preserve the USB 2.0 Full-Speed eye diagram per the Microchip PIC32MM GPM hardware reference.
Route the USB DP/DM traces on the top layer with a continuous ground plane beneath them and place a ferrite bead or small inductor in series with VBUS if the design must survive hot-plug transients. Keep the crystal traces (if used) short and surrounded by ground pour; if the internal 8MHz RC oscillator is used instead, leave the OSC1/OSC2 pins floating or terminated per the Microchip PIC32MM GPM hardware reference manual.
Estimated: with 25MHz CPU and 128KB ECC Flash active, the part draws approximately 5-7 mA at full compute load. Do not assume the microAptiv core supports wait-states in the Flash; the PIC32MM GPM uses a prefetch module and you must configure the KSEG0 prefetch bits per the device header file or the first flash-bank reads will be slower than expected. Additionally, do not enable ECC bypass mode without verifying that the bootloader writes 32-bit ECC-correct data, otherwise subsequent reads may flag single-bit errors spuriously.
The USB Full-Speed DP/DM lines on the PIC32MM0128GPM028-I/SS require a 15 kohm pull-down on each line if no upstream device is connected. When designing USB device products with detachable cables, add ESD protection rated at +/-15kV air discharge (per IEC 61000-4-2) close to the USB connector. The internal USB transceiver expects a 47pF-100pF capacitance on each DP/DM line to ground for USB Full-Speed signalling compliance per the USB 2.0 specification.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified - the I-suffix is industrial grade; the E-suffix variant PIC32MM0128GPM028-E/SS is intended for AEC-Q100 applications. Halogen-free status not stated on the public datasheet.
