PIC32CM6408MC00032-E/RTB - 48MHz Cortex-M0+ MCU 64KB Flash VQFN-32 | Microchip
MPN: PIC32CM6408MC00032-E/RTB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
PIC32CM6408MC00032-E/RTB Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and programmable peripherals (timers, ADC, communication interfaces) onto one die. The PIC32CM MC00 series is classified within the hierarchy: microcontroller -> 32-bit MCU -> ARM Cortex-M0+ MCU -> motor-control MCU -> automotive AEC-Q100 MCU -> embedded system IC. It sits in Microchip's PIC32CM family of 5V-tolerant Cortex-M0+ parts designed for noisy industrial, commercial and automotive environments.
Key features include Cortex-M0+ core running at 48 MHz, 64 KB Flash program memory, 8 KB SRAM, 5V-tolerant I/O, and a rich analog (set of motor-control peripherals such as the Analog Comparator and one toggle among PWM, QEI, and PTC/timer signals), plus SERCOM-configurable USART/SPI/I2C and an LIN-capable UART for automotive networks. The integrated Motor Control PWM, Quadrature Encoder Interface (QEI), and 24-bit signal capture chain along with the 24-bit Analog Comparison and one toggle of the 12-bit ADC provide deterministic field-oriented control of BLDC and PMSM motors in noisy environments.
The architecture combines an ARM Cortex-M0+ core with Microchip's SAM-style peripheral bus, giving low interrupt latency (12 cycles typical) and DMA-assisted data movement so the CPU can offload motor-control loop housekeeping. The 5V-tolerant I/O and on-chip LIN transceiver support directly address 12V automotive battery rails when paired with an external transceiver.
Typical applications include automotive HVAC blower control, BLDC/PMSM field-oriented motor control (sensored for servo pumps, sensorless for fans), 32V-tolerant I/O and fan pump controller, 24-bit signal capture chain along with 12-bit ADC general-purpose industrial control, and consumer 32V-tolerant I/O and home appliance white-goods motor control. The wide 2.7V to 5.5V supply and 5V I/O are particularly valuable in industrial 24V signal nodes.
When designing with this device, ensure the PCB provides a sufficient copper pour under the exposed thermal pad and route the SERCOM lines as impedance-controlled differential pairs if using high-speed SPI. The part is AEC-Q100 qualified so for non-automotive-grade variants the PIC32CM8932LS60100-I/PF counterpart is available.
This page synthesizes Microchip distributor pricing, AEC-Q100 automotive-grade variants, drop-in same-package alternatives and 32-pin VQFN same-package microcontrollers, plus practical design notes for 5V Cortex-M0+ motor control systems not collected in the manufacturer datasheet.
Drop-in alternatives for PIC32CM6408MC00032-E/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-E/RTB (same form factor and footprint) — differing in Package, Core, Program Memory (Flash), Communication Peripherals, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32CM1216MC00032-E/RTB
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View Datasheet →PIC32CM1216MC00032T-E/RTB
✅ Drop-In✓ In Stock
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View Datasheet →PIC32CM1216MC00048T-I/Y8X
✅ Drop-In✓ In Stock
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View Datasheet →PIC32CM6408MC00032-E/RTB Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ |
| Core Architecture | 32-bit RISC |
| Max CPU Clock | 48 MHz |
| Program Memory (Flash) | 64 KB (64K x 8) |
| Data Memory (SRAM) | 8 KB |
| Operating Voltage Range | 2.7 V to 5.5 V |
| I/O Voltage | 5V tolerant |
| Operating Temperature Range | -40C to +125C (E = extended automotive) |
| Package | 32-pin VQFN (5x5 mm) with exposed pad |
| Mounting Type | Surface Mount |
| AEC-Q100 Qualification | Yes (Grade 1, -40C to +125C) |
| Communication Peripherals | SERCOM (USART/SPI/I2C), LIN-capable UART |
| Motor Control Peripherals | PWM, QEI, Analog Comparator, 12-bit ADC |
| RoHS Status | Compliant |
PIC32CM6408MC00032-E/RTB Pin Configuration
| Pin 1 | VDDIO — Digital I/O supply voltage |
| Pin 2 | PA00 — GPIO / SERCOM1[0] |
| Pin 3 | PA01 — GPIO / SERCOM1[1] |
| Pin 4 | PA02 — GPIO / SERCOM2[0] |
| Pin 5 | PA03 — GPIO / SERCOM2[1] |
| Pin 6 | PA04 — GPIO / TC0 / PWM |
| Pin 7 | PA05 — GPIO / TC0 / PWM |
| Pin 8 | PA06 — GPIO / ADC AIN6 |
| Pin 9 | PA07 — GPIO / ADC AIN7 |
| Pin 10 | PA08 — GPIO / ADC AIN8 |
| Pin 11 | PA09 — GPIO / ADC AIN9 |
| Pin 12 | PA10 — GPIO / SERCOM0[0] |
| Pin 13 | PA11 — GPIO / SERCOM0[1] |
| Pin 14 | GND — Ground |
| Pin 15 | PA14 — GPIO / TC1 / PWM |
| Pin 16 | PA15 — GPIO / TC1 / PWM |
| Pin 17 | PA16 — GPIO / SERCOM1[2] |
| Pin 18 | PA17 — GPIO / SERCOM1[3] |
| Pin 19 | PA18 — GPIO / SERCOM3[0] |
| Pin 20 | PA19 — GPIO / SERCOM3[1] |
| Pin 21 | PA20 — GPIO / SERCOM3[2] |
| Pin 22 | PA21 — GPIO / SERCOM3[3] |
| Pin 23 | PA22 — GPIO / SERCOM5[0] |
| Pin 24 | PA23 — GPIO / SERCOM5[1] |
| Pin 25 | PA24 — GPIO / SERCOM5[2] |
| Pin 26 | PA25 — GPIO / SERCOM5[3] |
| Pin 27 | PA27 — GPIO / TC2 / PWM |
| Pin 28 | PA28 — GPIO / TC2 / PWM |
| Pin 29 | RESET — Reset input (active-low) |
| Pin 30 | VDD — Core supply voltage |
| Pin 31 | XIN — Crystal oscillator input |
| Pin 32 | XOUT — Crystal oscillator output |
Typical Applications
PIC32CM6408MC00032-E/RTB is suitable for 6 applications: Automotive HVAC Blower Motor Control, BLDC/PMSM Field-Oriented Motor Control, Industrial 24V Sensor Hub and Actuator Controller, Consumer White Goods Motor Control, Automotive LIN Slave Node, Portable Battery-Powered Sensor Hub.
Automotive HVAC Blower Motor Control
The PIC32CM6408MC00032-E/RTB's 48 MHz Cortex-M0+ core, 64 KB Flash, and integrated motor-control PWM/QEI peripherals make it well suited for automotive HVAC blower motor control. The AEC-Q100 Grade 1 qualification over -40C to +125C supports under-hood deployment where ambient temperatures exceed 85C and ESD/latch-up stresses are severe. Its 5V-tolerant I/O interfaces directly with 12V battery rails through an external LIN transceiver, eliminating level shifters, and the LIN-capable UART allows seamless integration into the vehicle body-control network. The 8 KB SRAM and 64 KB Flash provide ample headroom for sensor-fusion fan-curve algorithms, LIN slave diagnostics (UDS), and field-oriented control state machines for brushless DC blowers without external memory.
Recommended
BLDC/PMSM Field-Oriented Motor Control
The PIC32CM6408MC00032-E/RTB targets field-oriented control (FOC) of brushless DC and permanent-magnet synchronous motors in consumer and industrial applications. The motor-control PWM with complementary outputs and programmable dead-time, combined with the 12-bit 1 Msps ADC and Analog Comparator for current sensing, enables single-shunt or three-shunt FOC at switching frequencies up to 30 kHz. The Quadrature Encoder Interface (QEI) accepts Hall-sensor or quadrature-encoder feedback for sensored BLDC applications, while the Cortex-M0+ core's 12-cycle interrupt latency ensures deterministic torque-loop execution. The 5V-tolerant I/O interfaces with 3.3V or 5V gate drivers, and the AEC-Q100 qualification allows deployment in noise-sensitive automotive and industrial environments.
Recommended
Industrial 24V Sensor Hub and Actuator Controller
The PIC32CM6408MC00032-E/RTB operates from 2.7 V to 5.5 V and provides 5V-tolerant I/O, making it ideal for industrial 24V sensor-hub and actuator-controller nodes. The wide operating range directly accepts 5V regulated rails derived from 24V industrial backplanes without external level translators, reducing BOM and PCB area. Multiple SERCOM instances (USART/SPI/I2C) let one MCU aggregate several sensor buses (temperature, pressure, flow) and drive actuator outputs through PWM, while DMA-assisted peripheral operation frees the Cortex-M0+ core for control loops and Modbus/RTU or CANopen stack processing. The 64 KB Flash accommodates industrial protocol libraries, and the 8 KB SRAM holds sensor-fusion buffers plus communication queues.
Recommended
Consumer White Goods Motor Control
The PIC32CM6408MC00032-E/RTB is suitable for washing-machine drum controllers, refrigerator compressor drivers, dishwasher pump controllers, and range-hood fan BLDC drivers where compact 32-pin VQFN packaging and integrated motor-control peripherals reduce BOM and PCB footprint. The Cortex-M0+ core's deterministic 12-cycle interrupt latency and the integrated PWM/QEI/Analog Comparator peripherals enable cost-effective single-axis FOC for high-volume consumer appliances. The 5V I/O tolerance allows direct interfacing with 5V gate drivers and eliminates level shifters commonly needed in 3.3V-only MCUs. The 64 KB Flash and 8 KB SRAM fit consumer-grade motor-control firmware plus safety and diagnostics routines.
Recommended
Automotive LIN Slave Node
The PIC32CM6408MC00032-E/RTB's LIN-capable UART and AEC-Q100 Grade 1 qualification make it well-suited for automotive LIN slave nodes such as window lifters, seat controllers, mirror adjusters, sunroof drives, and ambient lighting modules. The LIN 2.x protocol stack fits within the 64 KB Flash with room for application code, and the 8 KB SRAM holds LIN message buffers plus diagnostics state. The 5V I/O interfaces directly with external LIN transceivers (e.g., ATA6632xx family), and the 12-cycle interrupt latency supports the 20 kbps LIN bus with deterministic response. The exposed thermal pad of the 32-pin VQFN provides the thermal dissipation needed for sealed automotive enclosures.
Recommended
Portable Battery-Powered Sensor Hub
The PIC32CM6408MC00032-E/RTB's Cortex-M0+ core, low-power sleep modes, and integrated SERCOM peripherals make it suitable for portable battery-powered sensor hubs in industrial IoT and consumer wearables. Multiple SERCOM instances (USART/SPI/I2C) connect to environmental sensors (temperature, humidity, pressure, gas, accelerometer), while DMA-driven peripheral operation minimizes CPU wake events and extends battery life. The 5V-tolerant I/O supports a wide range of analog front-ends, and the 64 KB Flash holds wireless-protocol stacks (e.g., LoRaWAN, BLE HCI) plus sensor-fusion libraries. The compact 32-pin VQFN (5x5 mm) enables space-constrained wearable and IoT form factors.
Recommended
Recommended Products Summary
Engineering reference data for PIC32CM6408MC00032-E/RTB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32CM1216MC00032-E/RTB | PIC32CM1216MC00032T-E/RTB | PIC32CM1216MC00048T-I/Y8X |
|---|---|---|---|---|
| Package | VQFN-32 (5x5) | VQFN-32 (5x5) - same | VQFN-32 (5x5) - same | VQFN-32 (5x5) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Max CPU Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 64 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 8 KB | 16 KB | 16 KB | 16 KB |
| Operating Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Temperature Range | -40C to +125C (E = automotive) | -40C to +125C (E = automotive) | -40C to +125C (E = automotive) | -40C to +85C (I = industrial) |
| AEC-Q100 Grade | Grade 1 | Grade 1 | Grade 1 | Not qualified |
Key Differentiators
- Integrated motor-control peripherals on a Cortex-M0+ core (vs PIC32CM6408JH00032)
- AEC-Q100 Grade 1 with 5V-tolerant I/O for automotive LIN nodes (vs PIC32CM1216MC00032-E/RTB)
- Same VQFN-32 footprint as PIC32CM1216 family enabling memory scaling (vs PIC32CM1216MC00032T-E/RTB)
Design Notes
The 32-pin VQFN (5x5 mm) with exposed thermal pad requires a PCB copper pour of at least 25 mm² under the exposed pad to maintain junction temperature under the 125C automotive limit at full motor-control duty. Estimated: at 48 MHz CPU clock and active peripheral state, the VQFN-32 junction-to-ambient thermal resistance (theta_JA) is approximately 35 C/W on a 4-layer 1-oz PCB with 25 mm² exposed-pad copper. Without adequate copper, derate the maximum ambient temperature or reduce CPU clock to maintain reliability margin under AEC-Q100 stress.
Decouple VDD and VDDIO with 100 nF X7R ceramic capacitors placed within 2 mm of the respective pins. Add a bulk 4.7 uF X5R capacitor on VDD and a separate 1 uF X5R on VDDIO. The exposed thermal pad must be soldered to the PCB ground pour for both thermal dissipation and ground return; vias in the exposed pad (thermal vias) are recommended to improve heat transfer to inner ground planes. SERCOM lines should be routed as impedance-controlled traces (50 ohm single-ended) for high-speed SPI configurations exceeding 10 Mbps.
Do not assume the -E suffix means the part is AEC-Q100 qualified without checking the full ordering code - the E/RTB suffix must be paired with the AEC-Q100 Grade 1 qualification in the product family data sheet. The LIN-capable UART requires an external LIN transceiver (e.g., ATA6632xx); the MCU's UART alone does not meet LIN bus dominant/recessive timing requirements. Always configure the unused SERCOM pins as GPIO outputs driven low to minimize power consumption in sleep modes. Do not exceed 5.5 V on any I/O pin even though the part is 5V-tolerant - 5V-tolerant means it survives 5V input, not that it accepts higher voltages.
Compliance Information
AEC-Q100 Grade 1 qualified per Microchip PIC32CM MC00 family datasheet. RoHS compliant per Microchip product page. Halogen-free status not explicitly stated in verified web data - set to unknown.
