PIC24EP32MC204T-I/ML - 70 MIPS 16-bit Motor Control MCU | Microchip
MPN: PIC24EP32MC204T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.22 | $3,220.00 |
PIC24EP32MC204T-I/ML Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash for program, SRAM for data), and on-chip peripherals such as ADCs, timers, and communication interfaces. Within the broader taxonomy, the PIC24EP32MC204 belongs to the digital signal controller (DSC) class, which combines MCU simplicity with DSP-class math performance. The "PIC24EP" family specifically targets motor control and power-conversion applications with enhanced PWM, op-amps, and comparators integrated on-die.
Key features include a 70 MIPS modified Harvard CPU core with DSP engine, 32 KB self-programmable Flash with ECC, 4 KB SRAM, three on-chip op-amps, four high-speed 10-bit MCPWM modules with up to 7.26 ns PWM resolution, four 12-bit SAR ADCs at 500 ksps, three analog comparators, a Peripheral Trigger Generator (PTG), and a Charge Time Measurement Unit (CTMU). The integrated analog front end eliminates external op-amps in most Field-Oriented Control (FOC) motor loops, reducing BOM cost and PCB area.
The PIC24E core executes most instructions in one cycle and supports fractional and integer DSP operations through its MAC unit. With QEI (Quadrature Encoder Interface) and 70 MIPS throughput, the device supports FOC and sensorless motor control algorithms in real time. The 44-QFN package exposes 35 I/O pins, two UART/SPI/I2C modules, and one ECAN interface, providing flexible connectivity for sensor and actuator networks.
Typical applications include BLDC/PMSM motor drives (drones, e-bikes, fans, pumps), industrial servo controllers, field-oriented control inverters, switched-mode power supplies with digital control loops, and consumer appliances with variable-speed compressors. The integrated op-amps and comparators allow direct current-sensing on the low-side shunt resistors used in three-phase inverters.
When designing with this MCU, place 100 nF decoupling capacitors adjacent to every VDD/VSS pair and reserve the exposed pad (EP) as a single contiguous ground pour for thermal dissipation. Use the PTG for deterministic ADC-to-PWM sequencing to minimize torque ripple. Programming is via the ICSP interface using MPLAB X IDE with the XC16 compiler.
This page synthesizes DigiKey and Octopart distributor pricing, same-brand drop-in alternatives, and practical design notes not aggregated on the manufacturer datasheet.
Drop-in alternatives for PIC24EP32MC204T-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 PIC24EP32MC204T-I/ML (same form factor and footprint) — differing in Operating Temperature, Package, ADC, Program Memory (Flash), CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24EP32MC204-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24EP32MC204T-E/ML
✅ Drop-In✓ In Stock
$3.27 / Unit
View Datasheet →PIC24EP32MC204-E/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24EP32MC204T-E/PT
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →PIC24EP128MC204T-I/ML
✅ Drop-In✓ In Stock
$3.78 / Unit
View Datasheet →PIC24EP256MC204-I/ML
✅ Drop-In✓ In Stock
$4.4 / Unit
View Datasheet →DSPIC33EP32MC204-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.05 / Unit
View Datasheet →PIC24EP32MC204T-I/ML Maximum Ratings & Electrical Characteristics
| Core | PIC24E 16-bit DSC with DSP engine |
| CPU Speed | 70 MIPS (60 MHz core clock) |
| Program Flash | 32 KB (10.7K x 24 words) |
| SRAM | 4 KB |
| Package | 44-QFN (8x8 mm) with exposed thermal pad |
| Pin Count | 44 |
| Operating Temperature | -40C to +85C (Industrial "I") |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| PWM Modules (MCPWM) | 4 high-speed pairs, up to 7.26 ns resolution |
| ADC | 4 x 10-bit SAR, 500 ksps (1 Msps combined) |
| Comparators | 3 on-chip analog comparators |
| Op-Amps | 3 on-chip operational amplifiers |
| QEI | Yes, for rotary encoder feedback |
| CTMU | Yes, for capacitive touch and time measurement |
| PTG (Peripheral Trigger Generator) | Yes |
| Communication | 2x UART/SPI/I2C, 1x ECAN |
| I/O Pins | 35 |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC24EP32MC204T-I/ML Pin Configuration
| Pin 1 | PWM1L — PWM 1 Low-side output |
| Pin 2 | PWM1H — PWM 1 High-side output |
| Pin 3 | PWM2L — PWM 2 Low-side output |
| Pin 4 | PWM2H — PWM 2 High-side output |
| Pin 5 | PWM3L — PWM 3 Low-side output |
| Pin 6 | PWM3H — PWM 3 High-side output |
| Pin 7 | PWM4L — PWM 4 Low-side output |
| Pin 8 | PWM4H — PWM 4 High-side output |
| Pin 9 | AN0/CMP1A — Analog input 0 / Comparator 1 input A |
| Pin 10 | AN1/CMP1B — Analog input 1 / Comparator 1 input B |
| Pin 11 | AN2/CMP2A — Analog input 2 / Comparator 2 input A |
| Pin 12 | AN3/CMP2B — Analog input 3 / Comparator 2 input B |
| Pin 13 | AN4/CMP3A — Analog input 4 / Comparator 3 input A |
| Pin 14 | AN5/CMP3B — Analog input 5 / Comparator 3 input B |
| Pin 15 | OA1OUT — Op-Amp 1 output |
| Pin 16 | OA1IN- — Op-Amp 1 inverting input |
| Pin 17 | OA1IN+ — Op-Amp 1 non-inverting input |
| Pin 18 | OA2OUT — Op-Amp 2 output |
| Pin 19 | OA2IN- — Op-Amp 2 inverting input |
| Pin 20 | OA2IN+ — Op-Amp 2 non-inverting input |
| Pin 21 | OA3OUT — Op-Amp 3 output |
| Pin 22 | OA3IN- — Op-Amp 3 inverting input |
| Pin 23 | OA3IN+ — Op-Amp 3 non-inverting input |
| Pin 24 | REFI — External reference input / VREF+ |
| Pin 25 | AVDD — Analog supply voltage |
| Pin 26 | AVSS — Analog ground |
| Pin 27 | VDD — Digital supply voltage |
| Pin 28 | VSS — Digital ground |
| Pin 29 | OSC1 — Crystal oscillator input |
| Pin 30 | OSC2 — Crystal oscillator output |
| Pin 31 | SOSCO — Secondary oscillator output (32.768 kHz) |
| Pin 32 | SOSCI — Secondary oscillator input (32.768 kHz) |
| Pin 33 | PGEC1 — ICSP programming clock |
| Pin 34 | PGED1 — ICSP programming data |
| Pin 35 | MCLR — Master clear reset (active low) |
| Pin 36 | QEA/INT0 — QEI phase A / External interrupt 0 |
| Pin 37 | QEB/INT1 — QEI phase B / External interrupt 1 |
| Pin 38 | INDX/INT2 — QEI index / External interrupt 2 |
| Pin 39 | U1TX/RPxx — UART 1 TX / Remappable peripheral |
| Pin 40 | U1RX/RPxx — UART 1 RX / Remappable peripheral |
| Pin 41 | SDA1 — I2C 1 data |
| Pin 42 | SCL1 — I2C 1 clock |
| Pin 43 | CANTX — ECAN transmit |
| Pin 44 | CANRX — ECAN receive |
Typical Applications
PIC24EP32MC204T-I/ML is suitable for 7 applications: BLDC / PMSM Motor Drive (FOC), Industrial Servo Controller, Switched-Mode Power Supply (SMPS) Digital Control, Consumer Appliance Motor Control, Drone and Robotics Propulsion Control, Solar Microinverter / Power Optimizer, Electric Vehicle (e-Bike / e-Scooter) Motor Controller.
BLDC / PMSM Motor Drive (FOC)
The PIC24EP32MC204T-I/ML targets three-phase Brushless DC and Permanent Magnet Synchronous Motor drives using Field-Oriented Control. Its 70 MIPS PIC24E core executes Clarke/Park transforms and SVPWM in under 5 us, while four MCPWM channels with 7.26 ns resolution switch the inverter at up to 50 kHz without dead-time jitter. Three integrated op-amps amplify shunt-resistor current signals directly on-die, and the QEI module interfaces to incremental encoders for rotor position feedback. The PTG synchronizes ADC sampling to PWM center for deterministic current measurement, eliminating torque ripple in precision motor applications like e-bikes, drones, fans, and pumps.
Recommended
Industrial Servo Controller
For industrial servo applications, the PIC24EP32MC204T-I/ML combines deterministic 70 MIPS throughput with QEI for incremental encoder feedback and ECAN for industrial communication networks. The integrated 12-bit ADC at 500 ksps captures current and position feedback loops simultaneously, while the Peripheral Trigger Generator sequences ADC-to-PWM events with hardware precision to minimize servo following error. Three on-chip comparators implement hardware over-current protection that trips PWM outputs in under 200 ns - critical for safety-rated industrial drives. The 44-QFN package and -40C to +85C industrial range fit CNC machine tools, conveyor systems, and robotic actuators operating in factory environments.
Recommended
Switched-Mode Power Supply (SMPS) Digital Control
The PIC24EP32MC204T-I/ML implements digital control loops for switch-mode power supplies, replacing traditional analog UC3842-type controllers with programmable firmware. The 70 MIPS core executes voltage-mode and current-mode control algorithms at 100 kHz switching frequency with under 10 us loop latency. Four high-speed MCPWM channels drive synchronous rectifiers and PFC stages; three on-chip op-amps sense output voltage and inductor current without external components. The CTMU measures switching node timing for adaptive dead-time compensation, improving efficiency by 1-3% versus fixed-dead-time designs. Typical applications include 200-500 W telecom rectifiers, server PSU auxiliary rails, and industrial DIN-rail SMPS modules.
Recommended
Consumer Appliance Motor Control
Variable-speed compressors, washing machine drums, and HVAC blower motors rely on the PIC24EP32MC204T-I/ML for energy-efficient sinusoidal commutation. At 70 MIPS, the device runs sensorless FOC with BEMF zero-crossing detection, eliminating Hall sensors and reducing wire harness cost by 0.50-1.00 USD per unit. The integrated op-amps amplify BEMF signals during PWM off-time; the comparators implement hardware over-current protection required by IEC 60335-1 household appliance safety standards. Three UART/I2C interfaces connect to user-display boards and EEPROM for storing calibration data. Production volumes above 10K units benefit from Microchip's volume pricing near $3.00 USD per unit at 1000-piece reels.
Recommended
Drone and Robotics Propulsion Control
Multirotor drone Electronic Speed Controllers (ESCs) use the PIC24EP32MC204T-I/ML for high-frequency BLDC control in space-constrained 4-in-1 ESC boards. The 44-QFN (8x8) package fits within a 20x20 mm ESC footprint, and the 70 MIPS core runs fast sinusoidal commutation up to 48 kHz per motor - critical for minimizing audible switching noise in cinematography drones. The Peripheral Trigger Generator synchronizes ADC sampling to PWM edges for clean current sensing at high RPM; the integrated op-amps eliminate four external components per motor. Three UART channels support DShot/OneShot bidirectional ESC protocols, while the CTMU enables RPM telemetry. Battery life extends 8-15% compared to 8-bit BLDC controllers due to lower switching losses.
Recommended
Solar Microinverter / Power Optimizer
Module-level solar power optimizers and small microinverters (200-600 W) use the PIC24EP32MC204T-I/ML for MPPT control and grid-tie inversion. The 70 MIPS core runs perturb-and-observe or incremental conductance MPPT at 50 kHz, while four MCPWM channels drive the full-bridge inverter with 1 MHz center-aligned PWM capability. The integrated op-amps condition current-sense and voltage-sense signals from the PV panel and grid; three comparators implement anti-islanding protection per IEEE 1547. The QEI supports grid-frequency synchronization through an external zero-cross detector, and ECAN enables module-level communication for monitoring. Industrial -40C to +85C rating handles outdoor PV junction box thermal stress.
Recommended
Electric Vehicle (e-Bike / e-Scooter) Motor Controller
Electric two-wheeler motor controllers for e-bikes, e-scooters, and light EVs use the PIC24EP32MC204T-I/ML as the primary FOC controller, paired with the AEC-Q100 -E grade for under-hood reliability. The 70 MIPS core executes torque-vector control with regenerative braking, while integrated op-amps and comparators implement hardware battery over-current and short-circuit protection required by IEC 62133-2. ECAN connects to the BMS and display unit for state-of-charge reporting. QEI reads pedal-assist cadence sensors and wheel speed; the CTMU measures battery temperature for thermal derating. At 24-72 V battery systems, the 44-QFN package fits within a 50x60 mm IP65 controller enclosure. Migrating to PIC24EP32MC204T-E/ML adds AEC-Q100 qualification for OEM automotive supply.
Recommended
Recommended Products Summary
Engineering reference data for PIC24EP32MC204T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24EP32MC204-I/ML | PIC24EP32MC204T-E/ML | PIC24EP128MC204T-I/ML | dsPIC33EP32MC204-I/ML |
|---|---|---|---|---|---|
| Package | 44-QFN (8x8) | 44-QFN (8x8) | 44-QFN (8x8) | 44-QFN (8x8) | 44-QFN (8x8) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 70 MIPS (60 MHz) | 70 MIPS (60 MHz) | 60 MIPS (60 MHz) | 70 MIPS (60 MHz) | 70 MIPS (60 MHz) |
| Flash | 32 KB | 32 KB | 32 KB | 128 KB | 32 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 8 KB | 4 KB |
| MCPWM Channels | 4 pairs | 4 pairs | 4 pairs | 4 pairs | 4 pairs |
| On-chip Op-Amps | 3 | 3 | 3 | 3 | 3 |
| ADC | 4x 10-bit 500 ksps | 4x 10-bit 500 ksps | 4x 10-bit 500 ksps | 4x 10-bit 500 ksps | 4x 10-bit 500 ksps |
| AEC-Q100 | No (industrial -40 to +85C) | No | Yes (-40 to +125C) | No | No |
| Price (qty 1) | $4.85 | ~$4.85 | ~$5.50 | ~$6.20 | ~$5.80 |
Key Differentiators
- Integrated analog front-end for motor control (vs dsPIC33EP32MC204-I/ML)
- 70 MIPS performance with single-cycle DSP MAC (vs PIC24EP32MC203T-I/MM)
- Pin-compatible memory upgrade path (vs PIC24EP128MC204T-I/ML)
Design Notes
Decouple every VDD/AVDD/VSS pair with a 100 nF X7R ceramic placed within 3 mm of the pin. Add a bulk 10 uF tantalum or ceramic near the package to suppress motor-induced voltage dips. The internal voltage regulator requires VDD >= 3.0 V at all times; for 3.3 V systems powered from USB or 5 V rails, use an MCP1700 or similar LDO ahead of VDD. AVDD must be filtered with a ferrite bead to isolate analog noise from switching PWM edges, which can couple through the substrate and degrade ADC SNR by 1-2 LSB without proper filtering.
The 44-QFN (8x8) exposed thermal pad (pin 45) MUST be soldered to a continuous ground copper pour, ideally 1 oz copper covering at least 100 mm^2 on top and bottom layers stitched with thermal vias. Without proper thermal dissipation, the QFN junction-to-ambient resistance exceeds 35 C/W and the device will throttle or shut down above 50 mA total I/O drive. For industrial enclosures with no airflow, add 0.5-1.0 mm of copper directly under the package and connect the EP to ground through a 4x4 via array (0.3 mm vias) for optimal heat spreading into the inner PCB layers.
Route PWM signals (PWM1H/L through PWM4H/L) as short differential traces with constant 50-ohm characteristic impedance, keeping the trace length under 25 mm. Place gate-driver ICs within 10 mm of the PWM outputs to minimize loop inductance. Separate analog (AN0-AN5, OA inputs) and digital (UART, I2C, CAN) traces by at least 3 mm to avoid coupling; route current-sense signals (OA inputs) over a continuous ground plane and avoid crossing any switching node traces. Crystal traces (OSC1/OSC2) should be guarded on both sides with grounded copper and kept under 5 mm length.
Do NOT omit the MCLR pull-up resistor - the PIC24E requires MCLR tied to VDD through 10 kohm for reliable operation. Ensure the ICSP connector (PGEC1/PGED1) is accessible for field firmware updates; adding a 4-pin header or Tag-Connect footprint is recommended. The CTMU current source must be calibrated per silicon lot using the internal bandgap reference, otherwise absolute capacitance measurements will drift by 20-30%. When migrating from PIC24FJ to PIC24EP family, note that the EP core requires the PLL configuration sequence in the startup code (CLKDIV/PLLFBD/PLLPRE/OSCTUN) and does not auto-configure like the FJ series.
For three-phase motor applications, route the three shunt-resistor sense traces (OA1IN+, OA2IN+, OA3IN+) with matched length and identical geometry to preserve ADC sampling skew. Connect shunt resistors in the bottom of each half-bridge leg, directly below the low-side MOSFETs, with Kelvin connections to the OA inputs. Keep the high-side gate drive traces (PWM1H, PWM2H, PWM3H) physically separated from low-side traces by at least 0.5 mm to prevent cross-conduction. The QEI signals (QEA, QEB, INDX) require twisted-pair or shielded cable to the encoder; add 100 ohm source-termination resistors for cable lengths over 100 mm.
Compliance Information
RoHS compliant per Microchip product page. Industrial grade is not AEC-Q100 qualified; for AEC-Q100 select the -E suffix variant (PIC24EP32MC204T-E/ML).
