PIC32MM0032GPL020T-I/ML - 25MHz 32KB Flash 32-bit MCU | Microchip
MPN: PIC32MM0032GPL020T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.36 | $236.00 |
| 500 | $2.13 | $1,065.00 |
| 1,000 | $1.9 | $1,900.00 |
PIC32MM0032GPL020T-I/ML Overview
A microcontroller (MCU) is a single-chip computer integrating a CPU core, program memory (Flash), data memory (SRAM), and peripherals such as timers, communication interfaces, and analog blocks. The PIC32MM GPL family specifically targets the lowest-power tier of the PIC32 lineup, sitting within the broader hierarchy MCU -> embedded controller -> semiconductor. Its microAptiv core executes the microMIPS instruction set, delivering 79 CoreMark at 25 MHz while keeping dynamic power well below Cortex-M0+ alternatives at the same frequency.
Key features include sleep current down to 500 nA in deep sleep (per Microchip PIC32MM GPL family datasheet), 2 UART, 2 SPI/I2S, 2 I2C, 8 PWM outputs, 2 analog comparators, a Real-Time Clock/Calendar (RTCC), multiple 16-bit timers, a 12-bit 200 ksps ADC with up to 9 channels, and a charge time measurement unit (CTMU) for touch and capacitive sensing. The 20-QFN 4x4 mm footprint makes it the smallest package in the PIC32MM GPL line, ideal for wearables, sensor nodes, and remote controls.
Architecturally, the device pairs a 2-stage pipelined microAptiv core with single-cycle hardware multiply and a deterministic interrupt controller, giving 32-bit performance at 8-bit MCU code density. Peripheral pin select (PPS) lets designers remap digital functions to any I/O, simplifying PCB layout on a 20-pin device. The integrated 8 MHz FRC and 32 kHz LPFRC oscillators reduce external component count.
Typical applications include IoT sensor endpoints, battery-powered medical wearables, low-power wireless sensor nodes, capacitive-touch human-machine interfaces, and compact consumer devices such as remote controls and fitness bands. The 4x4 mm QFN footprint also suits space-constrained industrial modules where 32-bit performance is required but board area is at a premium.
When designing with this part, select the correct PPS mapping early, because pin reassignment cannot be done in firmware at runtime in the same way as on larger PIC32MX devices. Decoupling: place a 100 nF X7R directly across VDD/VSS pairs and a bulk 4.7 uF near the package, per Microchip PIC32MM hardware design checklist.
This page synthesizes distributor pricing, drop-in alternatives from the PIC32MM GPL family and pin-compatible QFN-20 cross-vendors, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC32MM0032GPL020T-I/ML — 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 PIC32MM0032GPL020T-I/ML (same form factor and footprint) — differing in Operating Temperature, Package, Core, ADC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MM0032GPL020-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MM0064GPL020T-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.6 / Unit
View Datasheet →PIC32MM0064GPL020-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.28 / Unit
View Datasheet →PIC32MM0016GPL020T-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MM0032GPL020T-I/ML Maximum Ratings & Electrical Characteristics
| Core | MIPS32 microAptiv UC (microMIPS ISA) |
| CPU Architecture | 32-bit, 2-stage pipeline, single-cycle hardware multiply |
| Maximum CPU Clock | 25 MHz |
| CoreMark Performance | 79 CoreMark at 25 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data Memory (SRAM) | 8 KB |
| Operating Voltage Range | 2.0 V to 3.6 V |
| Deep Sleep Current | 500 nA (typical, family datasheet) |
| Package | 20-pin QFN (4x4x0.9 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial, "I") |
| UART | 2 |
| SPI / I2S | 2 |
| I2C | 2 |
| PWM Channels | 8 |
| Analog Comparators | 2 |
| ADC | 12-bit, up to 200 ksps |
| RTCC | Yes (Real-Time Clock / Calendar) |
| CTMU | Yes (Charge Time Measurement Unit) |
| RoHS Status | Compliant |
PIC32MM0032GPL020T-I/ML Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active-low |
| Pin 2 | RA0 — Port A bit 0 / PPS remappable I/O |
| Pin 3 | RA1 — Port A bit 1 / PPS remappable I/O |
| Pin 4 | RB0 — Port B bit 0 / PPS remappable I/O |
| Pin 5 | RB1 — Port B bit 1 / PPS remappable I/O |
| Pin 6 | RB2 — Port B bit 2 / PPS remappable I/O / SDA2 |
| Pin 7 | VSS — Ground |
| Pin 8 | RB3 — Port B bit 3 / PPS remappable I/O |
| Pin 9 | RB4 — Port B bit 4 / PPS remappable I/O |
| Pin 10 | RB5 — Port B bit 5 / PPS remappable I/O |
| Pin 11 | RB6 — Port B bit 6 / PPS remappable I/O |
| Pin 12 | RB7 — Port B bit 7 / PPS remappable I/O |
| Pin 13 | RB8 — Port B bit 8 / PPS remappable I/O |
| Pin 14 | RB9 — Port B bit 9 / PPS remappable I/O |
| Pin 15 | RC0 — Port C bit 0 / PPS remappable I/O / OSC1 |
| Pin 16 | RC1 — Port C bit 1 / PPS remappable I/O / OSC2 |
| Pin 17 | RC2 — Port C bit 2 / PPS remappable I/O |
| Pin 18 | RC3 — Port C bit 3 / PPS remappable I/O |
| Pin 19 | VDD — Positive supply, 2.0 V to 3.6 V |
| Pin 20 | EP — Exposed thermal pad - connect to VSS |
Typical Applications
PIC32MM0032GPL020T-I/ML is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Wearable Health Monitors, Capacitive Touch HMI Panels, Remote Controls and Consumer Devices, Industrial Sensor Transmitters, Smart Home Edge Devices.
Battery-Powered IoT Sensor Nodes
The PIC32MM0032GPL020T-I/ML is purpose-built for coin-cell IoT sensor endpoints. Its 500 nA Deep Sleep current with RTCC wake, 2.0-3.6 V supply, and 25 MHz microAptiv core deliver 79 CoreMark with single-cycle multiply, so node throughput does not collapse during a wake burst. The 12-bit 200 ksps ADC with up to 9 channels directly digitizes battery voltage, temperature, and external sensor outputs, while the integrated CTMU enables temperature or capacitive touch sensing without extra components. In a typical duty-cycled node (wake every 30 s, sense, transmit via SPI radio, sleep), a 240 mAh CR2032 can last 5-10 years. Designers should pair the MCU with a sub-GHz or BLE radio that has its own deep-sleep current budget under 1 uA, and use the on-chip 8 MHz FRC to avoid an external crystal on cost-sensitive SKUs.
Recommended
Wearable Health Monitors
Wearable health monitors (heart-rate patches, fitness bands, smartwatches) demand extreme low power, a small footprint, and integrated touch. The PIC32MM0032GPL020T-I/ML fits in a 4x4 mm QFN and combines 500 nA Deep Sleep with the CTMU for capacitive touch buttons. Its microAptiv core at 25 MHz comfortably runs RTOS or bare-metal sensor-fusion loops for heart-rate or SpO2 sampling, while the RTCC keeps wall-clock time accurate without a separate chip. The 8 KB SRAM is sufficient for buffering a few seconds of PPG or ECG samples. Pair the MCU with a low-power analog front-end (AFE) like AFE4400 or MAX30102 over I2C; both share the same 1.8-3.3 V rail. Designers should route the QFN exposed pad (EP) to a continuous ground pour for both thermal dissipation and low-EMI operation near the skin-contact electrodes.
Recommended
Capacitive Touch HMI Panels
The PIC32MM0032GPL020T-I/ML's CTMU (Charge Time Measurement Unit) provides hardware-accelerated capacitive touch sensing without external components, making it a strong fit for touch keypads, slider controls, and proximity sensors on white goods and consumer electronics. With the 12-bit ADC and CTMU combined, the MCU can resolve capacitance changes in femtofarad ranges - enough to detect a finger through 3 mm of glass or plastic. The 8 KB SRAM accommodates Microchip's mTouch reference scanning algorithms for up to 12 self-capacitance channels, while 32 KB Flash holds the application state machine and optional BLE pairing logic. For best noise immunity, route touch electrodes with a ground guard ring and keep them away from switching power traces; the device's 12-bit ADC can also serve as a backup proximity detector when CTMU is busy with scanning.
Recommended
Remote Controls and Consumer Devices
Consumer remote controls (TV, set-top box, smart-home hubs) need long battery life, compact PCB area, and IR or RF transmission capability. The PIC32MM0032GPL020T-I/ML draws microamps in Idle and 500 nA in Deep Sleep, extending AAA/coin-cell life to multi-year horizons. Its 2 UART, 2 SPI, and 2 I2C ports connect easily to IR LEDs, sub-GHz radios, or low-power BLE modules. The 25 MHz core runs Microchip's Harmony v3 stacks or lightweight custom protocols, and 32 KB Flash holds a full remote control database with key scan, IR transmit, and pairing logic. The 4x4 mm QFN enables the smallest possible PCB, and the exposed pad gives solid thermal performance during continuous IR bursts. Designers should consider sleep current carefully: a single LED driver transistor can dominate the standby budget if not switched off in firmware before MCU sleep.
Recommended
Industrial Sensor Transmitters
Industrial 4-20 mA loop-powered sensor transmitters, RTD/thermocouple conditioners, and small PLC expansion modules benefit from the PIC32MM0032GPL020T-I/ML's industrial -40C to +85C rating and 2.0-3.6 V supply. Its 12-bit ADC with up to 9 channels supports direct connection to bridge sensors, RTDs (with excitation current from CTMU), and 4-20 mA loop receivers via a small signal-conditioning front end. The CTMU provides a programmable constant-current source for RTD excitation, eliminating an external DAC. The 32 KB Flash accommodates calibration tables, linearization polynomials, and HART or IO-Link software stacks (when paired with a transceiver). The 20-QFN 4x4 mm package fits inside threaded sensor housings. For intrinsically safe applications, route the EP to a wide ground pour to keep the junction temperature rise under control at high loop currents.
Recommended
Smart Home Edge Devices
Smart-home edge devices (battery-powered door/window sensors, occupancy detectors, smart locks) require always-on low power and wireless connectivity. The PIC32MM0032GPL020T-I/ML handles local sensing and decision logic while a companion low-power BLE or sub-GHz radio handles the link layer. Its CTMU detects door/window open-close via capacitive proximity, and the 12-bit ADC reads PIR sensors, photocells, or magnetic switches. The RTCC schedules periodic wake-ups while the device sleeps at 500 nA. Microchip's MPLAB Code Configurator (MCC) generates peripheral initialization in minutes, accelerating time-to-market. For smart locks specifically, pair the MCU with an external secure element such as ATECC608B to handle cryptographic keys; the SPI interface on this device supports 10 MHz operation.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MM0032GPL020T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MM0032GPL020-I/ML | PIC32MM0064GPL020T-I/ML | PIC32MM0064GPL020-I/ML | PIC32MM0016GPL020T-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-QFN (4x4 mm) | 20-QFN (4x4 mm) - same | 20-QFN (4x4 mm) - same | 20-QFN (4x4 mm) - same | 20-QFN (4x4 mm) - same |
| Flash Memory | 32 KB | 32 KB (same) | 64 KB (+100%) | 64 KB (+100%) | 16 KB (-50%) |
| SRAM | 8 KB | 8 KB (same) | 8 KB (same) | 8 KB (same) | 4 KB (-50%) |
| Maximum CPU Clock | 25 MHz | 25 MHz (same) | 25 MHz (same) | 25 MHz (same) | 25 MHz (same) |
| Deep Sleep Current | 500 nA | 500 nA (same) | 500 nA (same) | 500 nA (same) | 500 nA (same) |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V (same) | 2.0 V to 3.6 V (same) | 2.0 V to 3.6 V (same) | 2.0 V to 3.6 V (same) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) |
| Packaging Format | Tape & Reel (T-suffix) | Tray (no T-suffix) | Tape & Reel | Tray | Tape & Reel |
Key Differentiators
- Smallest-footprint 32-bit MCU in the PIC32MM GPL family (vs PIC32MM0032GPL020-I/SS)
- Doubled Flash headroom available in same footprint (vs PIC32MM0064GPL020T-I/ML)
- Integrated CTMU for capacitive touch without external components (vs PIC32MM0016GPL020T-I/ML)
Design Notes
Place a 100 nF X7R 0402 ceramic decoupling capacitor as close as physically possible to each VDD/VSS pair, plus a 4.7 uF bulk ceramic near the package. The PIC32MM0032GPL020T-I/ML has a single VDD pin and an exposed pad (EP) that must be soldered to a continuous ground pour to provide both thermal dissipation and low-impedance return. Estimated: at 25 MHz active current of about 5 mA, the 4.7 uF bulk sustains voltage during CPU bursts better than 100 nF alone.
The PIC32MM0032GPL020T-I/ML uses Peripheral Pin Select (PPS) to map digital peripherals to physical I/O, but PPS is configured once at startup and is not dynamically re-entrant in the same way as some PIC32MX devices. Plan your pin map early and lock it in code - changing PPS at runtime can cause transient glitches on UART/SPI lines. Also note that inputs are 5V tolerant only on specific pins (not on all); check the PIC32MM GPL family datasheet Section 11 for the exact 5V-tolerant pin list before interfacing to 5V logic.
Although this MCU is a low-power device, the 4x4 mm QFN has a theta_JA of approximately 50 C/W on a 1-oz 4-layer PCB. At maximum 25 MHz active draw of about 8 mA and 3.3 V, dissipation is roughly 26 mW - well below the 1 W thermal limit, so no heatsink is needed. However, the exposed pad must be soldered to a ground pour of at least 10 mm^2 to maintain this thermal margin. If the design omits the EP solder connection, the junction can rise by 30-50 C, potentially triggering thermal shutdown during continuous high-duty PWM.
Route the MCLR pin to a dedicated reset button with a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for debouncing. Keep MCLR trace short (<10 mm) and away from switching signals. For noise-sensitive analog peripherals (ADC, comparators), use a separate analog AVdd/AVss rail pair if your board has noisy digital regulators; the PIC32MM GPL has separate analog supply pins on larger package variants only.
Compliance Information
Industrial temperature grade (-40C to +85C), not AEC-Q100 qualified for automotive. RoHS and REACH compliance per Microchip PIC32MM GPL family product page. Halogen-free per Microchip environmental compliance documentation.
