PIC32CM6408MC00032-I/RTB - 48MHz 32-VQFN Motor Control MCU | Microchip
MPN: PIC32CM6408MC00032-I/RTB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.56 | $35.60 |
| 100 | $3.17 | $317.00 |
| 500 | $2.86 | $1,430.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC32CM6408MC00032-I/RTB Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory, working RAM, and a rich set of peripherals (ADC, timers, communication interfaces) on a single die. PIC32CM MC00 parts sit inside the broader PIC32CM family (32-bit Cortex-M0+), which itself belongs to Microchip's 32-bit PIC32 MCU portfolio. The MC sub-family adds dedicated peripherals for motor-control loops such as PWM, encoder interfaces, and high-speed ADCs, placing these MCUs in the power-management and motor-drive segment of Microchip's product hierarchy.
Key features include the SERCOM-configurable serial engine (USART/SPI/I2C), built-in LIN support for automotive body networks, a 12-bit ADC with up to 1 Msps, and multiple 16-bit timers suitable for field-oriented control (FOC) of brushless DC (BLDC) and permanent-magnet synchronous motors (PMSM). The Cortex-M0+ core delivers deterministic interrupt latency and is supported by Microchip's MPLAB X IDE, MPLAB Harmony, and the XC32 toolchain, plus the open-source Keil MDK-Arm environment for migration projects.
Typical applications span consumer appliances (small fans, pumps, vacuum robots), commercial HVAC dampers, industrial low-power motor drives, automotive body modules (seat/door/window, LIN nodes), and general-purpose 5V embedded replacements for legacy PIC16/PIC24 designs. The wide 2.7V-5.5V supply range means the part can be powered directly from a USB rail, a 3.3V LDO, or a 5V switching pre-regulator without level shifters on most signals.
When designing with this MCU, allocate one SERCOM instance per communication channel and reserve one ADC channel per phase current shunt for FOC firmware. Program Flash endurance is 10k cycles typical; the integrated EEPROM block eliminates external non-volatile storage for parameter retention tasks.
Drop-in alternatives for PIC32CM6408MC00032-I/RTB — 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 PIC32CM6408MC00032-I/RTB (same form factor and footprint) — differing in Package, Operating Temperature, Core, Communication Peripherals, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32CM1216MC00032-I/RTB
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View Datasheet →PIC32CM1216MC00032T-E/RTB
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View Datasheet →PIC32CM1216MC00032-E/RTB
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View Datasheet →PIC32CM6408MC00032-I/RTB Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ |
| Bit Width | 32-bit single-core |
| Maximum CPU Speed | 48 MHz |
| Program Flash | 64 KB (64K x 8) |
| SRAM | 8 KB (8K x 8) |
| EEPROM | 2 KB (2K x 8) |
| Supply Voltage Range | 2.7 V to 5.5 V |
| I/O Pins | 26 |
| Package | 32-VQFN (5x5 mm) with exposed pad (RTB) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial grade -I) |
| ADC | 12-bit, multi-channel |
| Communication Peripherals | SERCOM (USART/SPI/I2C), LIN |
| Timers | 16-bit TCC/PWM timers for motor control |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
PIC32CM6408MC00032-I/RTB Pin Configuration
| Pin 1 | PA00 — GPIO / SERCOM pad |
| Pin 2 | PA01 — GPIO / SERCOM pad |
| Pin 3 | PA02 — GPIO / ADC input |
| Pin 4 | PA03 — GPIO / ADC input / VREFB reference |
| Pin 5 | GND — Ground |
| Pin 6 | VDD — Digital supply input (2.7V-5.5V) |
| Pin 7 | PA04 — GPIO / ADC input |
| Pin 8 | PA05 — GPIO / ADC input |
| Pin 9 | PA06 — GPIO / SERCOM pad |
| Pin 10 | PA07 — GPIO / SERCOM pad |
| Pin 11 | PA08 — GPIO / SERCOM pad |
| Pin 12 | PA09 — GPIO / SERCOM pad |
| Pin 13 | PA10 — GPIO / SERCOM pad |
| Pin 14 | PA11 — GPIO / SERCOM pad |
| Pin 15 | GND — Ground |
| Pin 16 | VDD — Digital supply input (2.7V-5.5V) |
| Pin 17 | PB00 — GPIO / SERCOM pad |
| Pin 18 | PB01 — GPIO / SERCOM pad |
| Pin 19 | PB02 — GPIO / SERCOM pad |
| Pin 20 | PB03 — GPIO / SERCOM pad |
| Pin 21 | PB04 — GPIO / SERCOM pad |
| Pin 22 | PB05 — GPIO / SERCOM pad |
| Pin 23 | PB06 — GPIO / SERCOM pad |
| Pin 24 | PB07 — GPIO / SERCOM pad |
| Pin 25 | PB08 — GPIO / SERCOM pad |
| Pin 26 | PB09 — GPIO / SERCOM pad |
| Pin 27 | RESET — Reset input (active-low) |
| Pin 28 | SWDIO — Serial Wire Debug I/O |
| Pin 29 | SWCLK — Serial Wire Debug clock |
| Pin 30 | GND — Ground |
| Pin 31 | VDD — Digital supply input (2.7V-5.5V) |
| Pin 32 | EP — Exposed thermal pad - tie to GND |
Typical Applications
PIC32CM6408MC00032-I/RTB is suitable for 6 applications: BLDC / PMSM Motor Control, Industrial 5V Sensor Hub, Automotive LIN Body Electronics, Consumer Appliance Control, HVAC Damper and Valve Actuator, Battery-Powered IoT Sensor Node.
BLDC / PMSM Motor Control
The PIC32CM6408MC00032-I/RTB drives small BLDC and PMSM motors in fans, pumps, and appliances with field-oriented control (FOC). Its 48 MHz Cortex-M0+ core executes FOC loops in real time while dedicated PWM timers generate center-aligned switching waveforms at up to 48 kHz. The 12-bit ADC samples phase currents from three shunt resistors at 1 Msps, providing closed-loop torque control. With 64KB Flash, designers can fit the Microchip MPLAB Harmony FOC library plus application code. The 2.7V-5.5V supply supports direct USB or 5V pre-regulator input. Pin-compatible 1216 variants (128KB Flash) are available for sensorless algorithms needing extra code space.
Recommended
Industrial 5V Sensor Hub
The PIC32CM6408MC00032-I/RTB serves as a 5V industrial sensor hub aggregating data from analog and digital sensors over LIN, I2C, SPI, or USART. The SERCOM peripheral reconfigures on the fly to support multiple protocols on shared pins, while the 12-bit ADC reads analog sensors directly. Its 8KB SRAM buffers transient measurement bursts, and 2KB EEPROM stores calibration constants across power cycles. The wide 2.7V-5.5V supply accommodates 24V industrial buses after a simple LDO pre-regulator. Industrial-grade -40C to +85C operation suits factory-floor environments without additional thermal management.
Recommended
Automotive LIN Body Electronics
The PIC32CM6408MC00032-I/RTB fits LIN-connected automotive body modules such as seat controllers, mirror adjusters, and window lifters. Built-in LIN support plus a 5V-tolerant supply rail makes it ideal for 12V battery systems. The Cortex-M0+ core handles LIN message scheduling while timers drive small brushed DC motors or LED indicators. With 64KB Flash, firmware can include both the LIN stack and the application logic in a single die. Designers upgrading to sensor-rich modules can migrate to the pin-compatible PIC32CM1216MC00032 with doubled Flash. The wide supply tolerance survives 12V cranking transients typical in automotive environments.
Recommended
Consumer Appliance Control
The PIC32CM6408MC00032-I/RTB controls consumer appliances such as washing machines, dishwashers, robotic vacuums, and small kitchen equipment. The Cortex-M0+ at 48 MHz drives HMI interfaces (LEDs, buttons, simple LCDs) and the motor-control peripherals for the main drive. With 64KB Flash and 8KB SRAM, the MCU fits a full state-machine plus user-interface firmware. The 5V tolerance means the MCU can be powered from the same rail as the gate driver, simplifying power tree design. EEPROM stores user settings (favorite cycles, last mode) across power cycles without external non-volatile memory.
Recommended
HVAC Damper and Valve Actuator
The PIC32CM6408MC00032-I/RTB drives small DC and stepper motors used in HVAC damper actuators and zone valves. Its motor-control peripherals deliver precise PWM outputs for proportional control, while the 12-bit ADC reads position feedback from potentiometers or Hall sensors. With 64KB Flash, designers can implement adaptive control algorithms and persistent fault logging. The industrial temperature range covers conditioned air plenums and outdoor equipment enclosures. The small 32-VQFN (5x5 mm) package fits inside compact actuator housings where PCB space is constrained.
Recommended
Battery-Powered IoT Sensor Node
The PIC32CM6408MC00032-I/RTB operates as a battery-powered IoT sensor node in industrial monitoring applications. With sleep currents in the microamp range and a Cortex-M0+ core that wakes quickly, the part is suited to duty-cycled sensing applications. The 12-bit ADC reads analog sensors (temperature, pressure, vibration), while SERCOM peripherals transmit data over UART or SPI to a radio module. The 2KB EEPROM stores node identity and calibration across deep-sleep cycles. The wide 2.7V-5.5V supply supports direct connection to a single-cell Li-ion (with boost) or 3.6V primary lithium battery packs.
Recommended
Recommended Products Summary
Engineering reference data for PIC32CM6408MC00032-I/RTB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32CM1216MC00032-I/RTB | PIC32CM1216MC00032T-E/RTB | PIC32CM1216MC00032-E/RTB |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-VQFN (5x5) RTB | 32-VQFN (5x5) RTB - same | 32-VQFN (5x5) RTB - same | 32-VQFN (5x5) RTB - same |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 64 KB | 128 KB (+100%) | 128 KB (+100%) | 128 KB (+100%) |
| SRAM | 8 KB | 16 KB (+100%) | 16 KB (+100%) | 16 KB (+100%) |
| EEPROM | 2 KB | 2 KB | 2 KB | 2 KB |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +125C (extended) |
| Supply Voltage | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| GPIO Count | 26 | 26 | 26 | 26 |
Key Differentiators
- 5V Cortex-M0+ with native LIN support (vs PIC32CM1216MC00032-I/RTB)
- Industrial temperature grade with extended supply range (vs PIC32CM1216MC00032T-E/RTB)
- Compact 32-VQFN footprint with exposed pad (vs PIC32CM6408MC00032-I/PT (TQFP))
Design Notes
Place a 100nF decoupling capacitor as close as possible to each VDD pin, plus a single 4.7uF bulk capacitor near the MCU. The exposed pad (EP) of the 32-VQFN package must be soldered to a grounded copper pour to provide thermal dissipation and a low-impedance ground return. Estimated: at 48 MHz with all peripherals active, expect 15-25 mA peak current draw from the 5V rail during PWM-intensive motor-control loops. The internal voltage regulator drops the 5V supply down to 1.8V for the core, so bulk capacitance on VDDIN is critical during high-current transient events such as ADC bursts.
Route the SWDIO and SWCLK signals as a 2-wire debug pair with a maximum length of 100 mm and keep them away from switching power traces. Place a 100nF capacitor on the RESET pin to ground for noise immunity. The 32-VQFN RTB package has 26 GPIO routed on three sides (PA00-PA11, PB00-PB09); reserve at least one full GPIO bank for motor-control PWM outputs and group phase A/B/C signals together for clean PCB layout. Keep analog ADC traces short and surrounded by a ground guard ring to minimize noise coupling from switching nodes.
Do not exceed 5.5V on any VDD pin; the absolute maximum is 6.0V and sustained overvoltage will damage the internal regulator. When migrating from PIC24/dsPIC designs, note that the PIC32CM uses Cortex-M0+ interrupt semantics (NVIC) rather than the PIC24 IFS/ IEC legacy registers. The SERCOM peripheral must be configured before use; failing to enable the SERCOM clock in PM will result in silent peripheral failure. The 10k Flash cycle endurance limit applies to erase/write operations in EEPROM emulation, not to read cycles.
Compliance Information
Industrial temperature grade -I; not AEC-Q100 qualified for automotive - select automotive-grade variants (e.g., PIC32CM MC AEC-Q100) for vehicle applications. RoHS and REACH compliant per Microchip product page.
