DSPIC33EP512MC502-E/SO - 16-bit 60 MIPS DSC, 512KB Flash | Microchip
MPN: DSPIC33EP512MC502-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.62 | $5.62 |
| 10 | $5.08 | $50.80 |
| 100 | $4.51 | $451.00 |
| 500 | $4.12 | $2,060.00 |
| 1,000 | $3.79 | $3,790.00 |
DSPIC33EP512MC502-E/SO Overview
A digital signal controller combines the periphery of a microcontroller (ADC, timers, UART, SPI, I2C) with the mathematical acceleration of a DSP (single-cycle MAC, DSP instruction set, barrel shifter) inside a single core. In the power-management hierarchy, the dsPIC33EP family sits between general-purpose MCUs and dedicated DSPs, targeting closed-loop systems such as digital power conversion and motor control where fast control-loop execution and rich analog integration matter more than raw compute throughput.
Key features of this MC (motor control) variant include the Motor Control PWM (MCPWM) peripheral with complementary outputs and dead-time insertion, a Quadrature Encoder Interface (QEI) for direct encoder feedback, and on-chip analog integration with ADC inputs, comparators and input-op-amp capability as highlighted by distributors (Mouser lists MCPWM, QEI, op amps, comparators). The 512 KB self-programming Flash supports field firmware updates, while the 48 KB SRAM accommodates control histories and buffering.
The dsPIC33EP core uses an enhanced 16-bit architecture with hardware DSP multiply-accumulate, providing deterministic execution for Proportional-Integral-Derivative loops running at switching frequencies used in digital power supplies. According to Microchip, the dsPIC33E family targets high-performance precision motor control systems that are more energy efficient and quieter, controlling brushless DC and permanent-magnet motors.
Typical applications include brushless DC (BLDC) and permanent-magnet synchronous motor drives, digital switched-mode power supplies (PFC, LLC), and embedded industrial control nodes requiring both encoder feedback and fast PWM generation.
A key design consideration: select the correct supply pin budget and decouple VDD/VSS pairs with 0.1 uF ceramics placed at each pin pair, and confirm pin assignment against the manufacturer datasheet before layout.
This page synthesizes distributor pricing, drop-in alternatives within the same 28-pin SOIC footprint, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP512MC502-E/SO — 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 DSPIC33EP512MC502-E/SO (same form factor and footprint) — differing in Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256MC502-H/SO
✅ Drop-In✓ In Stock
$4.38 / Unit
View Datasheet →DSPIC33EP256MC502-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC502-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.29 / Unit
View Datasheet →DSPIC33EP64MC502-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP512GP502-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.95 / Unit
View Datasheet →DSPIC33EP512MC502-E/SO Maximum Ratings & Electrical Characteristics
| Core | dsPIC33EP 16-bit DSC |
| CPU Speed | 60 MIPS |
| Program Memory Size | 512 KB (170K x 24) Flash |
| SRAM | 48 KB |
| Package | 28-SOIC |
| Operating Temperature | -40C to +125C (extended, E grade) |
| Mounting Type | Surface Mount |
| Motor Control PWM (MCPWM) | Yes |
| Quadrature Encoder Interface (QEI) | Yes |
| On-chip Comparators | Yes |
| On-chip Op Amps | Yes (per MC family description) |
DSPIC33EP512MC502-E/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset / programming voltage input |
| Pin 2 | AN0/VREF+/CN0/RB0 — Analog input 0 / positive voltage reference |
| Pin 3 | AN1/VREF-/CN1/RB1 — Analog input 1 / negative voltage reference |
| Pin 4 | AN2/CN2/RB2 — Analog input 2 / change notification / port B |
| Pin 5 | AN3/CN3/RB3 — Analog input 3 / change notification / port B |
| Pin 6 | AN4/CN4/RB4 — Analog input 4 / comparator input / port B |
| Pin 7 | AN5/CN5/RB5 — Analog input 5 / comparator input / port B |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN6/RA2 — Oscillator input / external clock in |
| Pin 10 | OSC2/CLKO/RC15 — Oscillator output / clock out / port C |
| Pin 11 | AN7/CN7/RB7 — Analog input 7 / debug channel / port B |
| Pin 12 | AN8/CN8/RB8 — Analog input 8 / peripheral pin select / port B |
| Pin 13 | AN9/CN9/RB9 — Analog input 9 / peripheral pin select / port B |
| Pin 14 | AN10/CN10/RB10 — Analog input 10 / peripheral pin select / port B |
| Pin 15 | AN11/CN11/RB11 — Analog input 11 / peripheral pin select / port B |
| Pin 16 | AN12/CN12/RB12 — Analog input 12 / peripheral pin select / port B |
| Pin 17 | AN13/CN13/RB13 — Analog input 13 / peripheral pin select / port B |
| Pin 18 | AN14/CN14/RB14 — Analog input 14 / peripheral pin select / port B |
| Pin 19 | AN15/CN15/RB15 — Analog input 15 / peripheral pin select / port B |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDD — Positive supply |
| Pin 22 | RP24/RB? — Peripheral pin select I/O (RP24) - confirm exact mux per datasheet |
| Pin 23 | RP27/INT0 — Peripheral pin select I/O / external interrupt 0 |
| Pin 24 | RP35 — Peripheral pin select I/O (RP35), timer/UART/PWM mapping via PPS |
| Pin 25 | RP36 — Peripheral pin select I/O (RP36), timer/UART/PWM mapping via PPS |
| Pin 26 | RP37 — Peripheral pin select I/O (RP37), timer/UART/PWM mapping via PPS |
| Pin 27 | RP41 — Peripheral pin select I/O (RP41), timer/UART/PWM mapping via PPS |
| Pin 28 | RP42 — Peripheral pin select I/O (RP42), timer/UART/PWM mapping via PPS |
Typical Applications
DSPIC33EP512MC502-E/SO is suitable for 6 applications: BLDC Motor Drives, Digital Switch-Mode Power Supplies, PMSM Servo and Robotics, Industrial Sensing and Control Nodes, Battery-Powered Portable Equipment, Automotive and E-Mobility Auxiliary Systems.
BLDC Motor Drives
The DSPIC33EP512MC502-E/SO fits brushless DC motor control because its Motor Control PWM peripheral generates complementary outputs with programmable dead time while the Quadrature Encoder Interface ingests position feedback directly. At 60 MIPS, the core executes commutation and PI current-loop math within PWM periods typical of industrial drives. Firmware for FOC or trapezoidal commutation uses the DSP MAC instructions for deterministic loop timing. Trade-off: an LDO-free 3.3 V design and gate-driver companion ICs are still required to complete the power stage.
Recommended
Digital Switch-Mode Power Supplies
In digital power conversion (PFC, LLC, buck), the DSPIC33EP512MC502-E/SO closes voltage and current loops with its 60 MIPS DSP core and high-speed PWM resolution. The single-cycle MAC accelerates compensator computation, while on-chip comparators support cycle-by-cycle current limiting without CPU intervention. Its 512 KB Flash leaves room for multiple operating profiles and field-updatable firmware. Unlike analog controllers, the DSC allows adaptive gain scheduling, but software development effort and loop-stability validation are higher than with a fixed analog controller.
Recommended
PMSM Servo and Robotics
Permanent-magnet synchronous motor servos benefit from the QEI peripheral accepting incremental encoder signals and the MCPWM driving three-phase inverters with dead-time control. The 48 KB SRAM holds trajectory buffers and filter histories, and the -E grade (-40C to +125C) tolerates hot robot joint enclosures. Field-oriented control loops run deterministically thanks to the 16-bit DSP instruction set. Design consideration: allocate DMA channels carefully so encoder counting and ADC sampling never contend with communication stacks on the same bus cycles.
Recommended
Industrial Sensing and Control Nodes
The DSPIC33EP512MC502-E/SO serves as an intelligent sensor node combining on-chip comparators and analog inputs with 512 KB Flash for protocol stacks and data logging. The extended temperature range suits panels and pump housings, while the 28-SOIC keeps board area small. UART, SPI and I2C interfaces link the node to displays, EEPROM and radios. Because the DSC core includes DSP instructions, on-node FFT-based vibration analysis can run locally, reducing raw data traffic on the industrial network.
Recommended
Battery-Powered Portable Equipment
Power-tool and e-mobility controllers use the DSPIC33EP512MC502-E/SO for motor commutation and battery management logic in one chip: MCPWM handles the drive stage while comparators implement overcurrent thresholds. The 60 MIPS core leaves margin for state-of-charge estimation math. The 28-SOIC's moderate footprint and surface-mount form factor suit compact handheld boards. Watch power budget: sleep-mode current and peripheral gating should be configured per the Microchip power-management features to maximize battery runtime in standby.
Recommended
Automotive and E-Mobility Auxiliary Systems
Auxiliary motor systems such as pumps, fans and actuators use the DSPIC33EP512MC502-E/SO where its extended -40C to +125C grade and robust 16-bit DSC core handle under-hood adjacent environments. MCPWM with fault inputs enables fast shutdown on overcurrent events, and the 512 KB Flash stores diagnostic routines and OTA-update bootloaders. Note: this standard part is not AEC-Q100 qualified; for fully qualified automotive designs, verify qualification status with Microchip before use in safety-critical positions.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP512MC502-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256MC502-H/SO | DSPIC33EP128MC502-I/SO | DSPIC33EP512GP502-I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| CPU Speed | 60 MIPS | 60 MIPS | 60 MIPS | 60 MIPS |
| Flash Memory | 512 KB (170K x 24) | 256 KB | 128 KB | 512 KB |
| MCPWM / QEI | Yes / Yes | Yes / Yes | Yes / Yes | No (GP peripheral set) |
| Pin Compatibility | Reference (28-SOIC) | Pin-to-pin compatible | Pin-to-pin compatible | Pin-to-pin compatible |
Key Differentiators
- Maximum Flash in the 28-SOIC MC50x family (vs DSPIC33EP256MC502-H/SO)
- Extended temperature grade (vs DSPIC33EP128MC502-I/SO)
- Motor-control peripheral set (vs DSPIC33EP512GP502-I/SO)
Design Notes
Decouple every VDD/VSS pin pair with a 0.1 uF X7R ceramic placed within 2 mm of the pins, and add 4.7-10 uF bulk capacitance near the supply entry. On 28-SOIC layouts the two VSS pins (8 and 20) should both be tied to a solid ground plane through short thermal-relief connections; never daisy-chain grounds. Keep the crystal within 10 mm of OSC1/OSC2 with guard rings to ground when the MCPWM peripheral switches heavy loads.
Peripheral Pin Select (PPS) must be explicitly configured before UART, SPI, or PWM signals appear on RP pins - uninitialized RP inputs float and can cause sporadic resets if left connected to motor-drive fault lines. Also, with -E grade parts, verify that the PCB copper and ambient allow the +125C rating; the rating is ambient-based and does not grant extra self-heating allowance. Always confirm exact pin muxing against the current Microchip datasheet before release.
MCPWM dead-time edges drive fast dv/dt into gate drivers; route the three half-bridge PWM trace pairs as short, matched groups and keep them away from the QEI encoder inputs, which are sensitive to capacitively coupled edges. A local RC snubber or ferrite bead on gate-driver supply returns reduces conducted emissions. Estimated: adding 100 ohm series resistors on each PWM output typically slows edge rates enough to meaningfully cut radiated harmonics at the cost of minor switching loss.
Compliance Information
Compliance status for this specific ordering code must be confirmed on the official Microchip product page; provided web data did not state RoHS/REACH values.
