DSPIC33EP512MC502T-I/MM - 70 MIPS 16-bit DSC, 512KB Flash | Microchip
MPN: DSPIC33EP512MC502T-I/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.68 | $46.80 |
| 100 | $4.16 | $416.00 |
| 500 | $3.75 | $1,875.00 |
| 1,000 | $3.38 | $3,380.00 |
DSPIC33EP512MC502T-I/MM Overview
A digital signal controller combines the compute throughput of a DSP with the peripheral integration and ease of use of a microcontroller, occupying the middle of the embedded hierarchy between general-purpose MCUs and standalone DSPs. DSCs are the dominant architecture for embedded motor control, digital power conversion, and sensing systems where real-time control loops execute at tens to hundreds of kilohertz.
Key features of this part include the 70 MIPS pipelined dsPIC33E core with integrated DSP multiply-accumulate instructions, motor-control PWM (MCPWM) peripherals, quadrature encoder interface (QEI) inputs, on-chip operational amplifiers and comparators, a 10/12-bit ADC subsystem, and CAN2.0b, I2C, SPI, and UART serial interfaces. The 512KB Flash supports 170K 24-bit instruction words, ample for complex field-oriented control (FOC) firmware with communication stacks.
Architecturally, the dsPIC33E family uses a modified Harvard bus with dedicated DSP multiply, multiply-accumulate, and barrel shifter instructions executing in a single cycle, enabling control-loop math and filtering directly in C or assembly. Peripherals support DMA transfers, reducing CPU overhead in high-rate data acquisition.
Typical applications include brushless DC (BLDC) and permanent-magnet synchronous motor (PMSM) drives, digital power supplies and LED drivers, and industrial automation nodes requiring CAN connectivity. Microchip explicitly positions the dsPIC33E family for high-performance, energy-efficient, quieter precision motor control systems.
Design consideration: this is a 3.3V (2.97V-3.63V) device; the VCAP/VDDCORE pin requires an external low-ESR capacitor for the internal 2.5V core regulator, and the -40C to +85C industrial temperature grade (I suffix) should be checked against your enclosure thermal budget in sealed motor-drive environments.
This page synthesizes distributor pricing context, drop-in family alternatives, pinout guidance, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP512MC502T-I/MM — 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 DSPIC33EP512MC502T-I/MM (same form factor and footprint) — differing in Operating Temperature, Package, Comparators, Core, Maximum CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP512MC502T-E/MM
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →DSPIC33EP512MC502-H/MM
✅ Drop-In✓ In Stock
$4.02 / Unit
View Datasheet →DSPIC33EP512MC502-I/MM
✅ Drop-In✓ In Stock
$4.19 / Unit
View Datasheet →DSPIC33EP256MC502-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC502-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP512MC502T-I/MM Maximum Ratings & Electrical Characteristics
| Core | dsPIC33E 16-bit DSC core |
| Maximum CPU Speed | 70 MIPS |
| Program Memory Size | 512KB (170K x 24) Flash |
| RAM Size | 48KB |
| Supply Voltage Range | 2.97 V to 3.63 V (3.3 V typical) |
| ADC Channels | 6x 10-bit/12-bit ADCs (per distributor listing) |
| Communication Interfaces | CAN2.0b, I2C, SPI, UART, IrDA, LINbus, QEI |
| Motor Control Peripherals | MCPWM (motor control PWM), QEI |
| Analog Peripherals | On-chip OpAmps, Comparators, PTG |
| I/O Pins | 21 |
| Package | 28-QFN-S (6x6 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| RoHS Status | Compliant |
| Packaging Suffix | T = Tape and Reel |
| Pin Count | 28 |
DSPIC33EP512MC502T-I/MM Pin Configuration
| Pin 1 | MCLR — Master clear reset input, active low (with programming voltage function) |
| Pin 2 | RB0/AN0/CN3 — Port B I/O, analog input AN0 |
| Pin 3 | RB1/AN1/CN2 — Port B I/O, analog input AN1, VREF- capable |
| Pin 4 | RB2/AN2/SS1/CN4 — Port B I/O, analog input AN2, SPI slave select 1 |
| Pin 5 | RB3/AN3/CN5 — Port B I/O, analog input AN3, QEI index capable |
| Pin 6 | RB4/AN4/CN6 — Port B I/O, analog input AN4, QEA input capable |
| Pin 7 | VDD — Digital power supply (3.3V) |
| Pin 8 | VSS — Digital ground |
| Pin 9 | RA2/OSC1/CLKI/CN12 — Oscillator input / clock input / port A I/O |
| Pin 10 | RA3/OSC2/CLKO/CN13 — Oscillator output / clock output / port A I/O |
| Pin 11 | VCAP/VDDCORE — Internal core regulator output - connect stabilizing capacitor to VSS |
| Pin 12 | VSS — Digital ground |
| Pin 13 | RB5/CN27 — Port B I/O, change notification, PGED function |
| Pin 14 | RF3/RP3 — Remappable peripheral pin (e.g. U1TX/SDO1) |
| Pin 15 | RF2/RP2 — Remappable peripheral pin (e.g. U1RX/SDI1) |
| Pin 16 | RB6/PGEC3 — Port B I/O, programming clock function |
| Pin 17 | RB7/PGED3 — Port B I/O, programming data function |
| Pin 18 | RB8 — Port B I/O |
| Pin 19 | RB9 — Port B I/O |
| Pin 20 | VDD — Digital power supply (3.3V) |
| Pin 21 | VSS — Digital ground |
| Pin 22 | RB10 — Port B I/O, analog-capable |
| Pin 23 | RB11 — Port B I/O, analog-capable |
| Pin 24 | RB12 — Port B I/O, analog-capable |
| Pin 25 | RB13 — Port B I/O, analog-capable |
| Pin 26 | RB14 — Port B I/O, analog-capable |
| Pin 27 | AVSS — Analog ground |
| Pin 28 | AVDD — Analog power supply |
Typical Applications
DSPIC33EP512MC502T-I/MM is suitable for 6 applications: BLDC / PMSM Motor Control, Digital Power Conversion, Industrial Automation and CAN Nodes, Digital Audio and Signal Processing, Medical and Portable Instrumentation, Automotive and Harsh-Environment Control.
BLDC / PMSM Motor Control
The DSPIC33EP512MC502T-I/MM is purpose-built for precision brushless DC and permanent-magnet synchronous motor drives. The MCPWM peripheral generates complementary PWM outputs with hardware dead-time insertion, while the quadrature encoder interface reads position feedback directly. On-chip op-amps amplify low-level shunt resistor current signals before the 10/12-bit ADC samples them, and the 70 MIPS core with single-cycle DSP multiply-accumulate instructions executes field-oriented control loops at 10-20 kHz without saturating the CPU. The 512KB Flash holds FOC firmware, a CANopen or Modbus stack, and a bootloader with room to spare. This enables energy-efficient, quieter motor operation as Microchip's dsPIC33E family positioning states, in appliances, HVAC blowers, pumps, and industrial servo drives.
Recommended
Digital Power Conversion
In digitally controlled AC-DC and DC-DC converters, the DSPIC33EP512MC502T-I/MM replaces analog control loops with firmware-defined compensation. The high-speed ADC channels sample output voltage and inductor current synchronously with the MCPWM period, and the 70 MIPS core executes digital PID or 3p3z control laws with latency low enough for 100-500 kHz switching frequencies on slower topologies. On-chip comparators can trip PWM outputs in hardware for cycle-by-cycle current limiting without CPU intervention. The 3.3V supply integrates cleanly with housekeeping rails, and 21 I/O pins support PMBus-style communication over I2C or UART. Typical uses include server power supplies, solar micro-inverters, and high-brightness LED drivers requiring precise current regulation.
Recommended
Industrial Automation and CAN Nodes
With an integrated CAN2.0b controller, I2C, SPI, and UART, the DSPIC33EP512MC502T-I/MM serves as a compact CAN node for factory automation, building control, and embedded sensing. The 512KB Flash accommodates full protocol stacks plus application logic, and the PTG (Programmable Timing Generator) handles repetitive sequencing tasks autonomously, freeing the 70 MIPS core for communication and decision logic. The 28-QFN 6x6 mm footprint with 21 I/O pins fits dense PCBs in I/O modules, sensor hubs, and actuator controllers. The industrial -40C to +85C temperature grade suits unconditioned cabinets, and the E-grade sibling extends qualification to automotive-adjacent deployments where AEC-Q100 evidence is required.
Recommended
Digital Audio and Signal Processing
The dsPIC33E core's single-cycle MAC, 40-bit accumulator, and barrel shifter make the DSPIC33EP512MC502T-I/MM effective for embedded DSP tasks such as audio filtering, tone generation, and FFT-based condition monitoring. The 512KB Flash stores large coefficient tables and multi-stage filter implementations, while the 48KB RAM buffers audio streams for processing. SPI supports high-speed codec connectivity and the ADC subsystem can ingest microphone or line-level signals after external conditioning. Embedded acoustic applications - such as active noise cancellation in appliances, ultrasonic flow sensing, and vibration-based predictive maintenance - benefit from running DSP math and system control in one 3.3V, 28-pin device rather than a separate MCU-plus-DSP pair.
Recommended
Medical and Portable Instrumentation
Portable medical and laboratory instruments - blood-pressure monitors, infusion pumps, desktop analyzers - use the DSPIC33EP512MC502T-I/MM to combine motor control (pumps, valves), analog sensing via the 10/12-bit ADC and op-amps, and user-interface communication over UART or SPI in a single low-power 3.3V device. The 28-QFN 6x6 mm package minimizes board area in handheld form factors, while 512KB Flash supports feature-rich firmware with OTA-style field updates via a bootloader. The 70 MIPS core handles real-time control loops and data logging concurrently. For battery-powered designs, verify sleep and idle current figures in the datasheet; the dsPIC33E family supports low-power idle modes that keep periodic sampling loops alive between wakeups.
Recommended
Automotive and Harsh-Environment Control
For automotive-adjacent and harsh-environment applications - auxiliary pumps, e-mobility actuators, off-highway equipment - the drop-in E-grade sibling DSPIC33EP512MC502T-E/MM carries AEC-Q100 qualification with an extended temperature range while preserving the same 28-QFN-S footprint, Flash, and peripheral set. CAN2.0b integration connects the node to vehicle or machine buses without an external controller. Engineers designing for these environments should start layout with the E-grade part even if early prototyping uses the cheaper I-grade, avoiding a requalification exercise later. Complementary PWM with dead-time and QEI feedback support electric power steering-style and throttle-actuator control loops at 70 MIPS.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP512MC502T-I/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP512MC502T-E/MM | DSPIC33EP512MC502-H/MM | DSPIC33EP256MC502-I/MM | DSPIC33EP128MC502-I/MM |
|---|---|---|---|---|---|
| Package | 28-QFN-S (6x6 mm) | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 70 MIPS | 60 MIPS class (E grade) | Lower speed grade (H) | 70 MIPS | 70 MIPS |
| Program Memory (Flash) | 512KB (170K x 24) | 512KB | 512KB | 256KB | 128KB |
| AEC-Q100 Qualified | No (industrial I grade) | Yes | No | No | No |
| CAN2.0b / MCPWM / QEI | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- 512KB Flash in a 28-pin QFN footprint (vs DSPIC33EP256MC502-I/MM)
- Automotive option without PCB change (vs DSPIC33EP512MC502T-E/MM)
- Maximum 70 MIPS performance grade (vs DSPIC33EP512MC502-H/MM)
Design Notes
The VCAP/VDDCORE pin (pin 11) is the output of the internal 2.5V core regulator and MUST be decoupled with a low-ESR ceramic capacitor (typically around 10 uF, value per the latest datasheet table) directly to VSS. Omitting or undersizing this capacitor causes brown-out resets and erratic operation. AVDD/AVSS (pins 28/27) power the ADC and op-amps - feed AVDD from VDD through an RC filter or ferrite bead for clean ADC results in motor-current sensing.
The 28-QFN-S 6x6 mm package dissipates heat mainly through its exposed pad. Estimated: at 70 MIPS with heavy I/O switching, core power is on the order of tens of milliwatts to ~100 mW - modest, but connect the exposed pad to a solid ground plane with an array of thermal vias. This is mandatory practice for the AEC-Q100 E-grade variant operating near +125C ambient, where every degree of junction-temperature margin matters for long-term reliability.
Route MCPWM outputs to gate drivers with matched lengths per half-bridge and keep high-di/dt motor phase traces away from the analog shunt-sense lines feeding RB0-RB4/ANx inputs. Use the on-chip op-amps with short, Kelvin-routed shunt connections. Place a 0.1 uF decoupling capacitor at each VDD pin plus bulk capacitance near the IC. For MCLR, include the recommended pull-up resistor and series programming resistor so the In-Circuit Serial Programming header remains accessible for field firmware updates.
This is a 3.3V-only device - do not connect 5V logic directly to RBx/RFx pins; level-shift or choose 3.3V-compatible peripherals. Verify the oscillator configuration: running from the internal FRC vs an external crystal changes both achievable MIPS and UART/CAN bit-rate accuracy. Remappable RPn pins (e.g. RF2/RF3) must be assigned to peripherals in firmware (PPS registers) before those functions appear on the pins - a frequent bring-up issue when UART appears dead.
Compliance Information
RoHS compliant per DigiKey listing. The standard I-grade part is not AEC-Q100 qualified; use the E-grade variant DSPIC33EP512MC502T-E/MM, which Microchip USA lists as AEC-Q100 qualified.
