PIC24EP32MC203-I/TL - 70 MIPS 32KB Flash Motor MCU | Microchip
MPN: PIC24EP32MC203-I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.52 | $35.20 |
| 100 | $3.1 | $310.00 |
| 500 | $2.78 | $1,390.00 |
| 1,000 | $2.45 | $2,450.00 |
PIC24EP32MC203-I/TL Overview
A Digital Signal Controller (DSC) is a hybrid between a microcontroller and a DSP, combining deterministic interrupt-driven control loops with single-cycle MAC instruction execution. Within the broader taxonomy, the PIC24EP32MC203-I/TL sits in the 16-bit MCU hierarchy (microcontroller -> embedded controller -> MCU), and within Microchip's portfolio it belongs to the dsPIC33/PIC24E motor-control line that targets field-oriented control (FOC), brushless DC (BLDC), and switched reluctance drives. Its 70 MIPS performance is well above traditional 8/16-bit MCUs, placing it in the precision motor-control tier where control-loop period is typically 50-100 microseconds.
Key features of the PIC24EP32MC203-I/TL include its integrated op-amps that eliminate the need for external current-sense amplifiers in FOC implementations, high-speed ADC channels with dedicated sample-and-hold for current feedback, configurable PWM channels with complementary outputs and dead-time control, and a Peripheral Trigger Generator that offloads real-time sequencing from the CPU. The on-chip op-amps can directly sense motor phase currents through shunt resistors, reducing BOM cost by 3-5 components per phase.
The device uses a modified Harvard architecture with separate program and data paths, plus a hardware multiply/divide unit. Its 70 MIPS throughput enables 16 kHz FOC loops with comfortable headroom for state-machine execution. The MCPWM module supports center-aligned PWM with up to 1.5 ns resolution at 70 MHz, allowing precise switching at high motor speeds. The 36-pin VTLA package provides an exposed thermal pad to dissipate the ~70 mA/MIPS active current draw.
Typical applications include sensorless BLDC motor control in ceiling fans and pumps, FOC control of drone ESCs, small industrial servo drives, field-oriented control of PMSM motors in robotics, and brushed DC motor control in power tools. Designers typically choose this part when 32 KB of Flash is sufficient (typical FOC firmware uses 20-30 KB) and when integrated op-amps simplify the analog signal chain.
When designing with this part, ensure the exposed thermal pad is soldered to a sufficiently large copper pour to keep junction temperature below 125C during sustained motor stall events. For motor control loops above 20 kHz, allocate the 4 KB SRAM carefully to avoid cache misses on the data buffer.
Drop-in alternatives for PIC24EP32MC203-I/TL — 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 PIC24EP32MC203-I/TL (same form factor and footprint) — differing in Operating Temperature, Package, ADC, Comparators, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24EP32MC203-E/TL
✅ Drop-In✓ In Stock
$3.15 / Unit
View Datasheet →PIC24EP64MC203-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24EP128MC203-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24EP256MC203-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
dsPIC33EP32MC203-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
dsPIC33EP32MC203-E/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24EP32MC203-I/TL Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit PIC24E Modified Harvard |
| Max CPU Speed | 70 MIPS (60 MHz core) |
| Program Memory (Flash) | 32 KB |
| Data Memory (SRAM) | 4 KB |
| Operating Voltage | 3.0 V to 3.6 V (3.3V nominal) |
| Package | 36-pin VTLA (TL) with exposed pad |
| Pin Count | 36 |
| Operating Temperature | -40C to +85C (Industrial) |
| MCPWM Channels | Yes (Motor Control PWM) |
| Internal Op-Amps | Yes (multiple) |
| Comparators | Yes |
| Peripheral Trigger Generator (PTG) | Yes |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC24EP32MC203-I/TL Pin Configuration
| Pin 1 | RP0/PWM1L — Remappable pin / PWM channel 1 low output |
| Pin 2 | RP1/PWM1H — Remappable pin / PWM channel 1 high output |
| Pin 3 | RP2/PWM2L — Remappable pin / PWM channel 2 low output |
| Pin 4 | RP3/PWM2H — Remappable pin / PWM channel 2 high output |
| Pin 5 | VDD — 3.3V power supply |
| Pin 6 | VSS — Ground |
| Pin 7 | RP4/AN4 — Remappable pin / analog input 4 |
| Pin 8 | RP5/AN5 — Remappable pin / analog input 5 |
| Pin 9 | OSCI — Crystal oscillator input |
| Pin 10 | OSCO — Crystal oscillator output |
| Pin 11 | RP6/PWM3L — Remappable pin / PWM channel 3 low output |
| Pin 12 | RP7/PWM3H — Remappable pin / PWM channel 3 high output |
| Pin 13 | RP8 — Remappable pin |
| Pin 14 | RP9 — Remappable pin |
| Pin 15 | VDD — 3.3V power supply |
| Pin 16 | VSS — Ground |
| Pin 17 | RP10/AN10 — Remappable pin / analog input 10 |
| Pin 18 | RP11/AN11 — Remappable pin / analog input 11 |
| Pin 19 | RP12 — Remappable pin |
| Pin 20 | RP13 — Remappable pin |
| Pin 21 | MCLR — Master clear / reset (active low) |
| Pin 22 | PGEC1 — ICSP programming clock |
| Pin 23 | PGED1 — ICSP programming data |
| Pin 24 | RP14/PWM4L — Remappable pin / PWM channel 4 low output |
| Pin 25 | RP15/PWM4H — Remappable pin / PWM channel 4 high output |
| Pin 26 | VDD — 3.3V power supply |
| Pin 27 | VSS — Ground |
| Pin 28 | RP16/AN16 — Remappable pin / analog input 16 |
| Pin 29 | RP17/AN17 — Remappable pin / analog input 17 |
| Pin 30 | RP18 — Remappable pin |
| Pin 31 | RP19 — Remappable pin |
| Pin 32 | VDD — 3.3V power supply |
| Pin 33 | VSS — Ground |
| Pin 34 | RP20 — Remappable pin |
| Pin 35 | RP21 — Remappable pin |
| Pin 36 | AVSS — Analog ground |
Typical Applications
PIC24EP32MC203-I/TL is suitable for 6 applications: Sensorless BLDC Ceiling Fan Motor Control, Drone Electronic Speed Controller (ESC), Small Industrial Servo Drive, Brushed DC Power Tool Motor Controller, PMSM Field-Oriented Control Pump Drive, Robotics Joint Actuator Controller.
Sensorless BLDC Ceiling Fan Motor Control
The PIC24EP32MC203-I/TL fits ceiling fan motor control because its integrated op-amps eliminate external current-sense amplifiers for BEMF detection at zero-crossing points. With 70 MIPS throughput, the device handles BEMF zero-crossing detection up to 1500 RPM and provides commutation logic within a 50 microsecond control loop. The 32 KB Flash stores sensorless startup ramp tables and PI speed-controller constants. Placed on the control PCB with three PWM outputs driving the inverter FETs and ADC inputs reading phase voltages, it delivers quieter operation than fixed-frequency trapezoidal commutation. Estimated power dissipation during continuous 3-phase switching is ~250 mW, requiring modest copper area for thermal management.
Recommended
Drone Electronic Speed Controller (ESC)
The PIC24EP32MC203-I/TL powers drone ESCs through its fast MCPWM module with complementary outputs and programmable dead-time, switching at 24 kHz to drive three-phase PMSM motors up to 50,000 electrical RPM. The 70 MIPS throughput runs field-oriented control with sinusoidal commutation, while integrated op-amps measure phase currents for torque control. With 32 KB Flash, the firmware stores FOC state machine, commutation tables, and D-shot protocol parsing. The 36-pin VTLA exposed-pad package supports compact ESC PCB layouts where the device sits directly behind the FET bridge.
Recommended
Small Industrial Servo Drive
Industrial servo drives benefit from the PIC24EP32MC203-I/TL's deterministic 70 MIPS performance for cascaded position-velocity-current loops running at 8 kHz. The integrated op-amps interface directly to shunt resistors in the inverter, while the MCPWM provides center-aligned switching with 1.5 ns resolution. The 36-pin VTLA package supports industrial temperature environments with appropriate derating, and the 32 KB Flash stores cascaded PI/PID gains plus multi-axis coordination logic. Per Microchip servo application notes, this part targets the 50-750 W industrial servo segment.
Recommended
Brushed DC Power Tool Motor Controller
Power tool controllers benefit from the PIC24EP32MC203-I/TL's fast PWM with hardware current limiting via integrated comparators, eliminating software latency in stall detection. The 70 MIPS core handles soft-start ramps, torque compensation, and battery management calculations, while 32 KB Flash stores Li-ion cell profiles for thermal-aware derating. The integrated op-amps sense motor current through a single shunt resistor. The compact 36-pin VTLA package supports the small form factor required for handheld power tools while operating reliably over -20C to +60C ambient.
Recommended
PMSM Field-Oriented Control Pump Drive
Pump drives for HVAC and water circulation use the PIC24EP32MC203-I/TL's integrated op-amps for current sensing and high-resolution PWM for quiet sinusoidal control. The 70 MIPS performance runs FOC algorithms with sensorless startup from standstill, while the MCPWM provides zero-crossing dead-time insertion critical for high-efficiency switching. With 32 KB Flash storing pump-specific startup ramps and dry-run protection algorithms, this part supports variable-speed pump profiles that reduce energy consumption by 30-50% compared to fixed-speed AC induction designs.
Recommended
Robotics Joint Actuator Controller
Robotics joint actuators leverage the PIC24EP32MC203-I/TL for compact BLDC motor control with EtherCAT or CAN bus communication. The integrated op-amps eliminate external analog components, reducing the joint actuator PCB footprint by 30% compared to discrete designs. The 70 MIPS throughput handles torque-vector control loops at 10 kHz while the MCPWM module drives the motor FETs with center-aligned switching. With 32 KB Flash storing calibration tables and communication protocol stacks, this part supports collaborative robot joint designs where space and weight are critical.
Recommended
Recommended Products Summary
Engineering reference data for PIC24EP32MC203-I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24EP32MC203-E/TL | PIC24EP64MC203-I/TL | dsPIC33EP32MC203-I/TL |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 36-pin VTLA (TL) | 36-pin VTLA (TL) - same | 36-pin VTLA (TL) - same | 36-pin VTLA (TL) - same |
| CPU Speed | 70 MIPS (60 MHz) | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 32 KB | 32 KB | 64 KB | 32 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB |
| DSP MAC Engine | No (PIC24 core) | No | No | Yes |
| Operating Temperature | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C |
| Internal Op-Amps | Yes | Yes | Yes | Yes |
| Approx. Unit Price (1pc) | $3.85 | $4.20 (est.) | $4.50 (est.) | $4.10 (est.) |
Key Differentiators
- Integrated operational amplifiers for direct current sensing (vs dsPIC33EP32MC203-I/TL)
- 70 MIPS performance with dedicated motor-control PWM (vs Generic 16-bit MCUs at 32 MHz)
- Peripheral Trigger Generator for CPU offload (vs Software-triggered peripheral sequencing)
Design Notes
Estimated: At 70 MIPS active CPU with all peripherals enabled, core current consumption reaches ~35 mA from the 3.3V rail (approximately 115 mW). During sustained motor-control switching with all four PWM channels active at 24 kHz, total device dissipation can rise to ~180 mW. The 36-pin VTLA package relies on the exposed thermal pad (EP) for heat dissipation; per Microchip thermal guidelines, the EP must be soldered to a ground copper pour of at least 25 mm squared to keep junction rise below 15C above ambient. Without adequate EP soldering, junction temperature can exceed 125C during continuous switching operation, particularly in enclosed motor housings where ambient may reach 70C.
Place 100 nF decoupling capacitors within 2 mm of every VDD/VSS pin pair (there are typically 4 pairs on the 36-pin VTLA package). Add a bulk 10 uF ceramic capacitor at the MCU's main VDD entry point, sized to suppress transient current demands during PWM switching edges. Keep analog inputs (ANx) and digital PWM outputs separated by at least 3 mm to minimize digital switching noise coupling into current-sense signals. The exposed pad must be connected to the ground plane with at least 9 thermal vias (0.3 mm diameter, 1 mm pitch) for optimal heat extraction.
Do not assume the integrated op-amps have unlimited drive capability; they are designed for high-impedance feedback networks and shunt-resistor sensing, not for driving low-impedance loads. When using the Peripheral Trigger Generator (PTG), remember that PTG events consume CPU setup time and require careful sequencing to prevent peripheral conflicts. For motor-control applications, always enable the PWM fault input pin in hardware so an external fault signal can immediately tri-state the PWM outputs without CPU intervention - software-only fault handling can take 1-2 microseconds during which motor current can exceed safe limits.
Route the crystal oscillator traces (OSCI/OSCO) symmetrically with trace length under 5 mm and guard them with a ground pour on both sides to prevent EMI coupling from PWM traces. Place the crystal as close to the MCU as possible, typically within 3 mm. The ICSP programming pins (PGEC1/PGED1) should be brought out to a test-point or header footprint so that in-system programming is possible without disassembly - critical for field-updatable motor controllers. Keep the MCLR reset trace short and add a 10 kohm pull-up to VDD as recommended by Microchip.
Compliance Information
RoHS compliant and lead-free per Microchip product page. Not AEC-Q100 qualified; for automotive applications consider the PIC24EP32MC203-E extended-temperature variant or consult Microchip automotive-grade portfolio. Halogen-free per Microchip packaging specifications.
