DSPIC33EP128MC502-I/SP - 70MIPS 16-bit DSC 128KB Flash | Microchip
MPN: DSPIC33EP128MC502-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.02 | $5.02 |
| 10 | $4.68 | $46.80 |
| 100 | $4.2 | $420.00 |
| 500 | $3.82 | $1,910.00 |
| 1,000 | $3.55 | $3,550.00 |
DSPIC33EP128MC502-I/SP Overview
A digital signal controller combines the computational architecture of a microcontroller with the DSP capability of a digital signal processor. In the power management hierarchy, the dsPIC33E family sits above general-purpose 16-bit MCUs by adding a DSP engine, barrel shifter, modulo and bit-reversed addressing, and single-cycle MAC instructions, making it a natural fit in the hierarchy: DSC -> digital signal controller -> embedded processor -> semiconductor.
Key features include a 16-bit pipelined core running at up to 70 MIPS (60 MHz Tcy referenced in distributor listings), 128 KB self-programmable FLASH with ECC, and the MC-class peripheral set: a Motor Control PWM (MCPWM) module, dual on-chip operational amplifiers, analog comparators, a 10/12-bit ADC, and CAN 2.0B, which together eliminate many external analog components in motor-control designs.
Technically, the dsPIC33E core uses a modified Harvard architecture with a 24-bit instruction word, two 40-bit accumulators, and hardware DSP multiply-accumulate for filter and control-loop execution. In-circuit and in-application programming (ICSP/ICAP), IEEE 1149.2-compatible JTAG boundary scan, and two program/data breakpoints support development and field updates.
Typical applications include brushless DC and PMSM motor control (FOC sensorless drives), digital power supplies (LLC, PFC), industrial automation nodes with CAN connectivity, and smart sensors where the integrated op amps buffer current-sense signals directly. The 28-pin SPDIP package suits through-hole prototyping and legacy industrial boards.
Design consideration: connect a low-ESR capacitor to the VCAP/VDDCORE pin for the internal core regulator, and route PGECx/PGEDx pairs in matched pairs for ICSP - PGEC2 must pair with PGED2.
This page synthesizes distributor pricing, drop-in alternatives, pinout, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP128MC502-I/SP — 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 DSPIC33EP128MC502-I/SP (same form factor and footprint) — differing in Package, Core, ADC Resolution, CPU Speed, Flash Program Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP64MC502-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP256MC502-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32MC502-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC502-H/SP
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →DSPIC33EP128MC202-I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.94 / Unit
View Datasheet →DSPIC33EP128MC502-I/SP Maximum Ratings & Electrical Characteristics
| Core | dsPIC33E 16-bit DSC core |
| Performance | 70 MIPS |
| CPU Frequency | 60 MHz |
| Program Memory | 128 KB (43K x 24) FLASH |
| RAM | 16 KB |
| Operating Voltage Range | 3.0 V to 3.6 V |
| Package | 28-pin SPDIP |
| Mounting Type | Through Hole |
| PWM Module | High-speed Motor Control PWM (MCPWM) |
| On-chip Op Amps | Yes |
| Comparators | Yes |
| CAN | CAN 2.0B |
| Peripherals (per listing) | MCPWM, OpAmps, Comparators, PTG, CAN |
| Debug/Programming | ICSP/ICAP, JTAG (IEEE 1149.2 compatible) |
| Operating Temperature | -40C to +85C (I grade) |
| Data Points/Breakpoints | Two program and two complex data breakpoints |
DSPIC33EP128MC502-I/SP Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low), programming voltage input |
| Pin 2 | AN0/VREF+/CN2B/RB0 — Analog input 0 / ADC positive voltage reference / port RB0 |
| Pin 3 | AN1/VREF-/CN3B/RB1 — Analog input 1 / ADC negative voltage reference / port RB1 |
| Pin 4 | AN2/SS1/CN4B/RB4 — Analog input 2 / SPI slave select / port RB4 |
| Pin 5 | AN3/INDX/CN5B/RB5 — Analog input 3 / encoder index input / port RB5 |
| Pin 6 | VSS — Ground reference |
| Pin 7 | OSC1/CLKI/CN7/RA2 — Oscillator crystal input / external clock input / port RA2 |
| Pin 8 | OSC2/CLKO/CN6/RA3 — Oscillator crystal output / clock output / port RA3 |
| Pin 9 | VDD — Positive supply (3.0 V to 3.6 V) |
| Pin 10 | PGED1/AN4/CN6B/RB6 — Programming data 1 / analog input 4 / port RB6 |
| Pin 11 | PGEC1/AN5/CN7B/RB7 — Programming clock 1 / analog input 5 / port RB7 |
| Pin 12 | TDI/RB8 — JTAG test data input / port RB8 |
| Pin 13 | TDO/RB9 — JTAG test data output / port RB9 |
| Pin 14 | VSS — Ground reference |
| Pin 15 | VCAP/VDDCORE — Internal core regulator capacitor connection - low-ESR cap required |
| Pin 16 | RP15/RB15 — Remappable peripheral pin 15 / port RB15 |
| Pin 17 | RP14/RB14 — Remappable peripheral pin 14 / port RB14 |
| Pin 18 | RP13/RB13 — Remappable peripheral pin 13 / port RB13 |
| Pin 19 | RP12/RB12 — Remappable peripheral pin 12 / port RB12 |
| Pin 20 | VDD — Positive supply (3.0 V to 3.6 V) |
| Pin 21 | RP11/RB11 — Remappable peripheral pin 11 / port RB11 |
| Pin 22 | RP10/RB10 — Remappable peripheral pin 10 / port RB10 |
| Pin 23 | RP2/RB2 — Remappable peripheral pin 2 / port RB2 |
| Pin 24 | RP3/RB3 — Remappable peripheral pin 3 / port RB3 |
| Pin 25 | RP4/RA0 — Remappable peripheral pin 4 / port RA0 |
| Pin 26 | RP5/RA1 — Remappable peripheral pin 5 / port RA1 |
| Pin 27 | AVSS — Analog ground reference |
| Pin 28 | AVDD — Analog positive supply |
Typical Applications
DSPIC33EP128MC502-I/SP is suitable for 6 applications: BLDC / PMSM Motor Control (FOC), Digital Power Supplies (LLC / PFC), Industrial Automation CAN Nodes, Power Inverters and UPS, Electric Power Steering and Automotive Auxiliary Drives, Through-Hole Prototyping and Education.
BLDC / PMSM Motor Control (FOC)
The DSPIC33EP128MC502-I/SP fits field-oriented control drives because its 70 MIPS DSP core executes the PI and Clarke/Park transforms with single-cycle MAC instructions, while the Motor Control PWM (MCPWM) module generates complementary gate signals with dead-time insertion. The integrated op amps buffer low-side shunt current signals directly, and the on-chip comparators support cycle-by-cycle overcurrent protection without external amplifier ICs, cutting BOM cost and board area. In a typical topology the DSC reads phase currents through its ADC, computes rotor position (sensorless via back-EMF observer or with an encoder input), and updates PWM duty cycles every PWM period. The 128 KB FLASH accommodates a full FOC stack plus CAN communication and fault logs, and the 16 KB RAM supports control-loop state buffering.
Recommended
Digital Power Supplies (LLC / PFC)
The DSPIC33EP128MC502-I/SP suits digital power conversion because its high-speed PWM supports phase-shifted and resonant topologies, and the 70 MIPS core closes voltage- and current-loop compensators with sample rates well above the converter bandwidth. The ADC with multiple channels samples output voltage, input current, and temperature synchronously with the PWM period, while on-chip analog comparators provide hardware overcurrent trip protection faster than any software loop. In an LLC converter, the DSC implements frequency control plus burst mode; in a PFC front end, it performs average current-mode control with input-feedforward. The CAN interface enables power-supervisory communication in server and telecom rectifier racks. The 3.0V-3.6V supply and industrial temperature range fit standard auxiliary bias rails.
Recommended
Industrial Automation CAN Nodes
The DSPIC33EP128MC502-I/SP integrates CAN 2.0B, making it a compact node controller for factory automation networks where sensors, actuators, and drives exchange deterministic messages. The 70 MIPS core handles CAN stack processing, application logic, and protocol translation simultaneously, while the Peripheral Trigger Generator (PTG) automates routine sequenced tasks offload-free. The integrated op amps condition analog sensor signals (pressure, position, current) before ADC sampling, and the 128 KB FLASH retains firmware plus calibration tables and device identification data. The industrial -40C to +85C rating covers unconditioned factory floors, and the through-hole 28-pin SPDIP package simplifies serviceable DIN-rail module designs where field replacement by technicians is expected.
Recommended
Power Inverters and UPS
For single-phase inverters and online UPS systems, the DSPIC33EP128MC502-I/SP generates sinusoidal PWM through its MCPWM module, closes the output-voltage regulation loop at high sample rates using the 70 MIPS core, and monitors battery and bus conditions through its ADC channels. The on-chip comparators implement fast hardware protection for overcurrent and shoot-through events, a critical requirement in power conversion where microseconds matter. CAN connectivity supports parallel-inverter current sharing and supervisory communication in rack-mounted UPS systems. The 128 KB FLASH stores compensation tables, battery-charge profiles, and logging firmware simultaneously, while the industrial temperature grade and internal core regulator simplify derating analysis in sealed enclosures with limited airflow.
Recommended
Electric Power Steering and Automotive Auxiliary Drives
Microchip's dsPIC33E family targets automotive auxiliary motor drives such as electric power steering pumps, radiator fans, throttle actuators, and fuel pumps. The DSPIC33EP128MC502-I/SP provides the dual on-chip op amps required for three-shunt or single-shunt phase-current sensing in sensorless FOC drives, and the MCPWM module supplies the dead-time-controlled gate signals for the inverter bridge. The 70 MIPS core executes position-estimation observers at PWM frequency, and its DSP MAC instructions keep the control loop deterministic. The 128 KB FLASH holds application firmware plus ASIL-supporting diagnostics routines, and CAN 2.0B connects the drive to the vehicle body controller. Note this commercial-grade SKU should be reviewed against the automotive-qualified family variants for safety-critical platforms.
Recommended
Through-Hole Prototyping and Education
The 28-pin SPDIP through-hole package makes the DSPIC33EP128MC502-I/SP a strong choice for breadboard prototyping, university embedded-systems and motor-control labs, and legacy industrial equipment with socketed DIP components. Students and engineers can explore DSP techniques - FIR filtering, FFT, FOC - on a 70 MIPS core without surface-mount assembly equipment. The dsPIC33EP family is supported by Microchip's free MPLAB X IDE and low-cost in-circuit debuggers, and SEGGER tooling also lists support for this device. The ICSP interface uses accessible PGEC/PGED pin pairs, and the datasheet documents two program and two complex data breakpoints plus JTAG boundary scan, giving learners exposure to professional debugging workflows. The industrial -40C to +85C grade tolerates bench abuse.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128MC502-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP64MC502-I/SP | DSPIC33EP256MC502-I/SP | DSPIC33EP128MC502-H/SP | DSPIC33EP128MC202-I/SP |
|---|---|---|---|---|---|
| Package | 28-pin SPDIP | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Performance | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Program Memory (FLASH) | 128 KB (43K x 24) | 64 KB | 256 KB | 128 KB | 128 KB |
| On-chip Op Amps | Yes | Yes | Yes | Yes | No |
| Motor Control PWM | Yes (MCPWM) | Yes (MCPWM) | Yes (MCPWM) | Yes (MCPWM) | Yes (MCPWM) |
| CAN 2.0B | Yes | Yes | Yes | Yes | Yes |
| Temperature Grade | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | H grade (high-temp variant) | -40C to +85C (I) |
| Mounting | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
Key Differentiators
- Integrated on-chip op amps (vs DSPIC33EP128MC202-I/SP)
- Largest FLASH in 28-pin SPDIP MC50x family (vs DSPIC33EP64MC502-I/SP)
- Industrial I-grade through-hole availability (vs DSPIC33EP128MC502-H/SP)
Design Notes
The VCAP/VDDCORE pin powers the internal core regulator. Connect a low-ESR ceramic capacitor (per the manufacturer datasheet value, typically in the microfarad range) directly from VCAP to VSS with a short, wide trace. Omitting this capacitor or using a high-ESR part causes core-voltage dips during high-load 70 MIPS execution and can manifest as erratic resets - especially in FOC motor drives where the CPU load changes step-wise at each PWM update.
For ICSP programming, the device offers multiple PGECx/PGEDx pairs (e.g., PGEC1/PGED1 on pins 11/10). You must use them as matched pairs: if ICSPCLK uses PGEC2, then ICSPDAT must use PGED2 - do not mix pairs. Also connect all VDD and VSS pins (pins 6, 9, 14, 20) as recommended in the NSDSP programming notes for this exact device, and keep the MCLR trace short with the standard 10k pull-up and programming-connector provision for field firmware updates.
Do not assume the supply range beyond 3.0V-3.6V: the dsPIC33EP generation is a 3.3V-only family, and 5V microcontroller habits (direct sensor hookup) will damage I/O. Partition analog layout: route AVDD (pin 28) through an RC filter from VDD and star-ground AVSS (pin 27) so switching noise from the MCPWM-driven inverter does not corrupt ADC current-sense readings. Confirm the exact capacitor value for VCAP and the 32 kHz oscillator requirements against the current Microchip datasheet revision before release.
Compliance Information
Active production part; RoHS/lead-free per distributor listings (DigiKey, Mouser). REACH, halogen-free and conflict-minerals declarations not present in verified data - confirm via Microchip's environmental compliance page.
