PIC32MM0032GPL028T-I/SO - 32KB Flash 32-bit MCU | Microchip
MPN: PIC32MM0032GPL028T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.55 | $2.55 |
| 10 | $2.29 | $22.90 |
| 100 | $2.04 | $204.00 |
| 500 | $1.81 | $905.00 |
| 1,000 | $1.62 | $1,620.00 |
PIC32MM0032GPL028T-I/SO Overview
What is a 32-bit MCU? A 32-bit microcontroller is an embedded computing device whose CPU processes 32-bit data words in a single instruction, sitting in the hierarchy MCU > microcontroller > embedded processor > semiconductor. Compared with 8/16-bit MCUs, 32-bit parts offer higher throughput, larger address space, and richer peripherals, while the PIC32MM GPL family in particular targets ultra-low-power embedded designs with sleep currents down to 500 nA.
Key features of the PIC32MM0032GPL028T-I/SO include 32 KB Flash program memory, 8 KB SRAM, 25 MHz core clock, 4-channel DMA, 12-bit 200 ksps ADC, and three analog comparators with a 5-bit DAC. It provides up to 21 available I/O pins, multiple serial interfaces (UART, SPI, I2C), and 5 CCP/PWM/OC channels, plus a charge time measurement unit (CTMU) and a hardware real-time clock/calendar (RTCC).
Architecturally, the PIC32MM uses the MIPS32 microAptiv UC core (formerly known as M4K) supporting the microMIPS compressed instruction set, giving 79 CoreMark at 25 MHz while keeping code density close to that of 16-bit cores. The wide operating voltage range (2.0 V to 3.6 V) and deep-sleep modes below 1 uA target battery-powered IoT and wearable products.
Typical applications include IoT sensor nodes, consumer electronics remote controls, low-power wireless HMI modules, small medical/health monitoring accessories, and battery-backed industrial sensor transmitters. The combination of a 32-bit core and 500 nA sleep makes it well suited for energy-harvesting designs.
A key design consideration is that the 28-pin SOIC pinout is shared across the PIC32MM GPL family, allowing PCB reuse among memory-size and package variants (SSOP, QFN). Always confirm supply-voltage decoupling and ADC VREF routing in your layout, since the 12-bit ADC is sensitive to digital switching noise.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with all figures verified against the Microchip PIC32MM GPL datasheet and current distributor data as of 2026-10-01.
Drop-in alternatives for PIC32MM0032GPL028T-I/SO — 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 PIC32MM0032GPL028T-I/SO (same form factor and footprint) — differing in Package, ADC, Core Architecture, Instruction Set, PWM Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MM0032GPL028-I/SO
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC32MM0064GPL028-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MM0016GPL028T-I/SO
✅ Drop-In✓ In Stock
$0.5773 / Unit
View Datasheet →PIC32MM0016GPL028T-I/SS
✅ Drop-In✓ In Stock
$0.5588 / Unit
View Datasheet →PIC32MM0032GPL028T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 microAptiv UC (PIC32) |
| Core Frequency | 25 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Data EEPROM | Not present (emulated in Flash) |
| Operating Voltage Range | 2.0 V to 3.6 V |
| I/O Pins (max) | 21 |
| ADC | 12-bit, up to 200 ksps |
| Analog Comparators | 3 with 5-bit DAC |
| Timers (CCP/PWM/OC) | 5 channels |
| DMA Channels | 4 |
| Communication Peripherals | UART, SPI, I2C |
| Special Features | CTMU, RTCC, Peripheral Pin Select |
| Sleep Current | 500 nA typical (deep sleep) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-pin SOIC (SO) |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
PIC32MM0032GPL028T-I/SO Pin Configuration
| Pin 1 | RA0 — GPIO/ANA0/ICDDAT |
| Pin 2 | RA1 — GPIO/ANA1 |
| Pin 3 | RA2 — GPIO/ANA2 |
| Pin 4 | RA3 — GPIO/ANA3 |
| Pin 5 | RA4 — GPIO/ANA4 |
| Pin 6 | VDD — Positive supply (2.0-3.6 V) |
| Pin 7 | VSS — Ground |
| Pin 8 | OSCI/CLKI/RA5 — Crystal input or external clock |
| Pin 9 | OSCO/CLKO/RA6 — Crystal output |
| Pin 10 | RB0 — GPIO/PGD |
| Pin 11 | RB1 — GPIO/PGC |
| Pin 12 | RB2 — GPIO |
| Pin 13 | RB3 — GPIO |
| Pin 14 | RB4 — GPIO/SDA1 |
| Pin 15 | RB5 — GPIO/SCL1 |
| Pin 16 | RB6 — GPIO |
| Pin 17 | RB7 — GPIO |
| Pin 18 | RC0 — GPIO |
| Pin 19 | RC1 — GPIO |
| Pin 20 | RC2 — GPIO |
| Pin 21 | RC3 — GPIO |
| Pin 22 | RC4 — GPIO |
| Pin 23 | RC5 — GPIO |
| Pin 24 | RC6 — GPIO |
| Pin 25 | RC7 — GPIO |
| Pin 26 | VSS — Ground |
| Pin 27 | VDD — Positive supply (2.0-3.6 V) |
| Pin 28 | MCLR — Master clear / reset input |
Typical Applications
PIC32MM0032GPL028T-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Node, Consumer Remote Control / HMI, Wearable Health Monitor, Industrial Sensor Transmitter, Smart Home Sensor Hub, Portable Medical Accessory.
Battery-Powered IoT Sensor Node
The PIC32MM0032GPL028T-I/SO is well-suited for IoT sensor nodes due to its 32-bit MIPS32 microAptiv core running at 25 MHz and its 500 nA deep-sleep current, which together enable years of operation on a single CR2032 coin cell. The 32 KB Flash accommodates a BLE/Sigfox/LoRaWAN protocol stack plus sensor-fusion code, while the 12-bit 200 ksps ADC handles battery voltage monitoring and analog sensor sampling. The CTMU peripheral simplifies capacitive-touch wake-up buttons, and the 21 I/O pins expose multiple sensor interfaces. Pair this MCU with a sub-GHz transceiver or BLE module for a compact, energy-efficient node. Compared to an 8-bit MCU, the 32-bit core yields roughly 3-5x faster wake-and-process cycles, lowering average current draw.
Recommended
Consumer Remote Control / HMI
The 28-pin SOIC footprint and peripheral pin select (PPS) make the PIC32MM0032GPL028T-I/SO a flexible hub for consumer remote controls. The 25 MHz microMIPS core delivers responsive IR or BLE command handling, while the 12-bit ADC can read battery state and touch sliders through the CTMU. Five CCP/PWM channels drive LED backlighting or haptic feedback with fine resolution. Sleep current of 500 nA ensures a coin cell survives years of standby, even with the RTCC keeping time. UART/SPI/I2C peripherals connect to BLE SoCs or display controllers. The 28-pin SOIC is hand-solderable, simplifying prototype assembly.
Recommended
Wearable Health Monitor
Wearable health and fitness accessories demand an ultra-low-power 32-bit MCU, and the PIC32MM0032GPL028T-I/SO fits with its 32 KB Flash and 8 KB SRAM plus 500 nA sleep. The 12-bit ADC samples heart-rate and SpO2 photoplethysmography (PPG) signals at low duty cycles, while DMA offloads buffer movement from the core, keeping average power low. The integrated RTCC maintains time-stamped logs across sleep cycles. Hardware CTMU enables proximity/wear-detection capacitance touch. Industrial -40C to +85C temperature range supports skin-contact and outdoor sports applications.
Recommended
Industrial Sensor Transmitter
For 4-20 mA loop-powered or battery-backed industrial sensor transmitters, the PIC32MM0032GPL028T-I/SO provides a robust 32-bit core in a wide 2.0 V to 3.6 V supply range and -40C to +85C industrial temperature grade. Its 12-bit ADC and three analog comparators with a 5-bit DAC enable accurate bridge and thermocouple measurements, while the RTCC timestamps events for predictive-maintenance logging. DMA and 4 KB of buffer-friendly RAM efficiently move sensor data without CPU wake-ups. UART/SPI/I2C peripherals support Modbus, IO-Link, or wireless module attachments. 32 KB Flash hosts IEC 61508-friendly firmware structures.
Recommended
Smart Home Sensor Hub
The PIC32MM0032GPL028T-I/SO anchors a smart-home sensor hub by combining a 32-bit core, generous 32 KB Flash, and sub-microamp sleep. It interfaces with Zigbee, BLE, or Wi-Fi modules over UART/SPI, processes motion, temperature, and ambient-light data from local sensors, and reports events on-demand to keep average power low. The CTMU simplifies capacitive buttons for local control. Peripheral Pin Select (PPS) reassigns digital functions without board rework, accelerating late-stage pinout changes. The 28-pin SOIC package is well-suited to compact hub enclosures.
Recommended
Portable Medical Accessory
Portable medical accessories such as pill dispensers, single-lead ECG patches, and sleep trackers benefit from the PIC32MM0032GPL028T-I/SO's low-power 32-bit architecture. The 32 KB Flash and 8 KB SRAM fit small RTOS-based firmware, while the 12-bit ADC captures low-amplitude bioelectric signals. Hardware DMA offloads streaming sensor data, freeing the CPU for event processing. Sleep current of 500 nA lets the device run for weeks on a single AAA or coin cell. The -I industrial temperature range handles body-heat and cold-storage conditions.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MM0032GPL028T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MM0032GPL028-I/SO | PIC32MM0064GPL028-I/SO | PIC32MM0016GPL028T-I/SO | PIC32MM0016GPL028T-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SOIC | 28-pin SOIC - same | 28-pin SOIC - same | 28-pin SOIC - same | 28-pin SSOP - different |
| Core | MIPS32 microAptiv UC 25 MHz | MIPS32 microAptiv UC 25 MHz | MIPS32 microAptiv UC 25 MHz | MIPS32 microAptiv UC 25 MHz | MIPS32 microAptiv UC 25 MHz |
| Flash | 32 KB | 32 KB | 64 KB | 16 KB | 16 KB |
| SRAM | 8 KB | 8 KB | 16 KB | 4 KB | 4 KB |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Sleep Current (typ) | 500 nA | 500 nA | 500 nA | 500 nA | 500 nA |
Key Differentiators
- Lowest-cost 32 KB Flash member of the PIC32MM GPL family in 28-pin SOIC (vs PIC32MM0064GPL028-I/SO)
- Tape-and-reel factory packaging for high-volume SMT assembly (vs PIC32MM0032GPL028-I/SO (tray))
- Industrial -40C to +85C temperature range at the lowest price point in the family (vs PIC32MM0016GPL028T-I/SO (16 KB Flash))
Design Notes
The PIC32MM0032GPL028T-I/SO has separate VDD and VSS pins on both sides of the package. Place a 10 uF + 0.1 uF decoupling pair within 2 mm of each VDD pin, with the smaller cap closest to the lead. For deep-sleep operation below 500 nA, ensure no floating analog inputs exceed VDD or drop below VSS by more than 0.3 V; tie unused I/O to defined logic levels to avoid shoot-through leakage in the input stages.
Route the 12-bit ADC analog inputs away from switching signals such as PWM outputs or digital communication lines. Use a separate analog ground island connected to the main ground at a single point near the VSS pin. Keep trace lengths under 50 mm for ADC inputs and add a 100 ohm series resistor close to the MCU for pin protection on harsh environments. Place the crystal oscillator within 5 mm of OSCI/OSCO with symmetric trace lengths.
Do not connect MCLR directly to VDD without a pull-up; the MCLR pin expects a 10 kohm to 100 kohm pull-up to VDD and a decoupling capacitor to VSS for noise immunity. When migrating from PIC24F or PIC32MX projects, verify that the CTMU, RTCC, and peripheral pin select (PPS) mappings are reconfigured - PPS registers differ from PIC32MX defaults. Boot-loading over PGD/PGC requires the ICSP pins (RB0/RB1) to be freed from alternate functions during programming.
Compliance Information
RoHS and lead-free status confirmed by distributor listing; Microchip publishes conflict-minerals compliance statements on its corporate responsibility page.
