DSPIC33EP128MU502-E/MM - 70MIPS 16-bit DSC, USB, QFN-28 | Microchip
MPN: DSPIC33EP128MU502-E/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.12 | $6.12 |
| 10 | $5.55 | $55.50 |
| 100 | $4.98 | $498.00 |
| 500 | $4.52 | $2,260.00 |
| 1,000 | $4.1 | $4,100.00 |
DSPIC33EP128MU502-E/MM Overview
A digital signal controller combines the computational capabilities of a digital signal processor (DSP) with the peripherals and ease of use of a microcontroller (MCU). Within the power-management hierarchy of embedded systems, a DSC sits between a general-purpose microcontroller and a dedicated DSP, providing hardware multiply-accumulate (MAC) units, fast interrupt handling, and deterministic execution for control loops such as digital power conversion, motor control, and audio filtering.
Key features of the DSPIC33EP128MU502-E include the DSP engine with dual 40-bit accumulators, an upstream-facing Full-Speed USB controller with built-in PHY, a 12-bit ADC with up to 10.9 msps throughput for fast analog sampling, and multiple UART, SPI, and I2C communication interfaces for system connectivity. The -E suffix designates the extended temperature range of -40C to +125C, making this device suitable for industrial and automotive-adjacent environments.
Architecturally, the dsPIC33E family executes the modified Harvard instruction set at up to 70 MIPS from a 3.0V to 3.6V supply, with oscillator options including an internal fast RC oscillator and crystal-driven PLL for frequency-critical USB operation. Flexible pin remapping (peripheral pin select) on RPx pins allows UART, SPI, and other digital peripherals to be routed to available I/O, simplifying board layout in a compact 28-pin footprint.
Typical applications include USB-connected industrial sensors and data loggers, digital power supplies requiring high-rate ADC feedback, brushless DC and PMSM motor control, and audio or communications equipment needing DSP-level math on a low-cost controller.
A key design consideration is powering VUSB3V3 from a separate regulated 3.3V rail and placing the VCAP/VDDCORE stabilizing capacitor per the manufacturer datasheet to guarantee reliable core-voltage generation and USB compliance.
This page synthesizes verified distributor data, same-package drop-in alternatives, pricing tiers, and practical design notes not found on the manufacturer datasheet alone, for buyers and design engineers researching the DSPIC33EP128MU502-E/MM.
Drop-in alternatives for DSPIC33EP128MU502-E/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 DSPIC33EP128MU502-E/MM (same form factor and footprint) — differing in Package, Timers, Operating Temperature, Communication Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128MU502-I/MM
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.98 / Unit
View Datasheet →DSPIC33EP256MU502-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64MU502-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC502-I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP128MC202T-E/MM
✅ Drop-In✓ In Stock
$3.41 / Unit
View Datasheet →DSPIC33EP128MU502-E/MM Maximum Ratings & Electrical Characteristics
| Core Type | 16-bit dsPIC33E DSC |
| Program Memory (Flash) | 128 KB |
| RAM | 16 KB |
| Maximum Operating Speed | 70 MIPS |
| ADC Resolution | 12-bit |
| ADC Sample Rate | Up to 10.9 msps |
| USB | USB 2.0 Full-Speed device, built-in PHY |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +125C (E grade) |
| Package | QFN-28 (MM), 6x6 mm |
| Mounting Type | Surface Mount |
| Communication Interfaces | UART, SPI, I2C |
| Timers | 16-bit timers, Input Capture / Output Compare, Motor Control PWM |
| Peripheral Pin Select | Yes (RPx remapping) |
| Product Category | Digital Signal Processors & Controllers - DSP, DSC |
DSPIC33EP128MU502-E/MM qfn-28 (mm), 6x6 mm Pin Configuration Guide
Pin configuration for DSPIC33EP128MU502-E/MM (qfn-28 (mm), 6x6 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for DSPIC33EP128MU502-E/MM.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP128MU502-E/MM is suitable for 6 applications: USB-Connected Industrial Sensors and Data Loggers, Digital Power Supplies (SMPS/PFC), Brushless DC and PMSM Motor Control, Audio and Communications DSP Processing, USB Test and Measurement Instruments, Automotive-Adjacent and Harsh-Environment Embedded Control.
USB-Connected Industrial Sensors and Data Loggers
The DSPIC33EP128MU502-E/MM fits USB-connected sensor nodes because it is one of the few dsPIC33E devices combining a Full-Speed USB 2.0 device PHY with a 12-bit ADC and 70 MIPS DSP math in a compact 28-pin QFN-28 footprint. In a typical design, the 12-bit ADC samples sensor channels at up to 10.9 msps, the DSP engine applies digital filtering or calibration, and the USB CDC/HID class streams data to a host PC without an external USB-to-serial bridge. The -40C to +125C extended temperature grade tolerates enclosed industrial cabinets. Supply from a 3.3V rail and reserve one pin-remappable RPx pin for USB detection logic.
Recommended
Digital Power Supplies (SMPS/PFC)
The DSPIC33EP128MU502-E/MM suits digital power conversion because its 70 MIPS core closes control loops with sub-15-cycle latency and its 12-bit ADC achieves up to 10.9 msps for fast current and voltage feedback. The hardware MAC engine executes PI or 2p2z compensators efficiently, while output-compare/PWM resources drive switching stages. At -40C to +125C the -E grade survives power-supply self-heating near magnetics. One design consideration: this MU variant's USB module can serve as an in-system tuning interface for firmware parameter adjustment, but USB is disabled during power stages commissioning to guarantee deterministic loop timing.
Recommended
Brushless DC and PMSM Motor Control
The DSPIC33EP128MU502-E/MM supports field-oriented control (FOC) of BLDC/PMSM motors: the 70 MIPS core executes Clarke/Park transforms and PI current loops within a 50 us PWM period using the dual 40-bit accumulator DSP engine, and the 12-bit ADC synchronizes current sampling to PWM centers via trigger mode. Peripheral pin select lets designers route capture and PWM-adjacent signals optimally on the 28-pin QFN footprint. For applications prioritizing advanced PWM fault handling over USB connectivity, the MC-family variant DSPIC33EP128MC502 offers motor-control-optimized peripherals in the identical package, making family-level migration straightforward.
Recommended
Audio and Communications DSP Processing
The DSPIC33EP128MU502-E/MM handles moderate-rate audio processing because its hardware MAC with dual 40-bit accumulators executes FIR/IIR filtering, AGC, and tone generation with deterministic 70 MIPS timing, while USB Full-Speed supports audio-class streaming to a host at up to 12 Mbps. The 16 KB RAM buffers USB endpoints and double-buffered sample frames; the 12-bit ADC digitizes microphone or line inputs directly for simple voice-band channels. For higher-fidelity paths, pair the controller with an external audio codec over the I2S-capable remappable pins. Deterministic interrupt latency keeps jitter below audible thresholds in typical voice-band designs.
Recommended
USB Test and Measurement Instruments
The DSPIC33EP128MU502-E/MM serves as the acquisition and control core in compact USB instruments: the 12-bit ADC digitizes measured signals at up to 10.9 msps, the DSP engine performs averaging, RMS computation, and FFT-based analysis, and the integrated Full-Speed USB device PHY transfers results to host software with no external bridge IC. The 28-pin QFN (6x6 mm) package keeps instrument PCBs small, and the -40C to +125C rating covers rack-mounted thermal conditions. Designers should place the VCAP/VDDCORE capacitor close to the pin and provide a clean 3.3V VUSB3V3 rail to maintain USB signal integrity during ADC sampling bursts.
Recommended
Automotive-Adjacent and Harsh-Environment Embedded Control
The DSPIC33EP128MU502-E/MM's extended -40C to +125C operating range (E grade) qualifies it for harsh-environment controllers such as under-hood auxiliary modules, industrial actuator drivers, and outdoor equipment monitoring, where cabin or enclosure temperatures routinely exceed standard industrial limits. The 70 MIPS core runs control and communications tasks; UART, SPI, and I2C interfaces link to LIN transceivers, sensors, and EEPROMs; and peripheral pin select adapts the 28-pin pinout to legacy board designs. Note this device is not AEC-Q100 qualified; for formal automotive qualification, verify current Microchip automotive-grade listings before design-in.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128MU502-E/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128MU502-I/MM | DSPIC33EP256MU502-I/MM | DSPIC33EP64MU502-I/MM | DSPIC33EP128MC502-I/MM | DSPIC33EP128MC202T-E/MM |
|---|---|---|---|---|---|---|
| Package | QFN-28 (MM), 6x6 mm | QFN-28 (MM) - same | QFN-28 (MM) - same | QFN-28 (MM) - same | QFN-28 (MM) - same | QFN-28 (MM) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 128 KB | 128 KB | 256 KB | 64 KB | 128 KB | 128 KB |
| RAM | 16 KB | 16 KB | 16 KB | 8 KB | 16 KB | 16 KB |
| USB Module | USB 2.0 Full-Speed device | USB 2.0 Full-Speed device | USB 2.0 Full-Speed device | USB 2.0 Full-Speed device | No USB | No USB |
| Core Performance | 70 MIPS, 16-bit DSP | 70 MIPS, 16-bit DSP | 70 MIPS, 16-bit DSP | 70 MIPS, 16-bit DSP | 70 MIPS, 16-bit DSP | 70 MIPS, 16-bit DSP |
| Operating Temperature | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) |
| ADC | 12-bit, up to 10.9 msps | 12-bit, up to 10.9 msps | 12-bit, up to 10.9 msps | 12-bit, up to 10.9 msps | 12-bit, up to 10.9 msps | 12-bit, up to 10.9 msps |
| Peripheral Set Focus | USB + general purpose | USB + general purpose | USB + general purpose | USB + general purpose | Motor-control PWM, no USB | Motor-control PWM, no USB |
Key Differentiators
- Integrated Full-Speed USB 2.0 device PHY (vs DSPIC33EP128MC502-I/MM)
- Extended temperature grade (vs DSPIC33EP128MU502-I/MM)
- Balanced memory in the smallest MU footprint (vs DSPIC33EP256MU502-I/MM)
- Pin-compatible supply-chain fallback (vs DSPIC33EP64MU502-I/MM)
Design Notes
The dsPIC33EP core is powered from an internal regulator: connect VDD to a clean 3.0V-3.6V rail and fit the manufacturer-specified low-ESR capacitor on the VCAP/VDDCORE pin, placed within a few millimeters of the pin. When USB is used, supply the VUSB3V3 pin from a separate regulated 3.3V source per the datasheet; do not tie it directly to a noisy main 3.3V rail that also powers relays or LEDs. Estimated voltage-drop concerns do not apply here, but sequencing and regulator load rating must cover inrush into bulk capacitors.
The 28-pin QFN (MM) package has an exposed thermal pad that should be soldered to a grounded copper pour for both thermal relief and ground integrity. Place 100 nF ceramic decoupling capacitors at each VDD pin pair within 2 mm of the pin, plus one 4.7 uF-10 uF bulk capacitor. Keep the VCAP capacitor isolated from fast-switching ground currents. For USB, route D+/D- as a matched 90-ohm differential pair with length matching within 1 mm and keep them away from PWM and switching nodes.
The MM QFN footprint differs from the SP (SPDIP) and SS (SSOP) versions of the same die; they are not interchangeable on the same land pattern, so qualify the exact suffix before second-sourcing. ADC channels and RPx remappable pins are shared and multiplexed - verify in the I/O map that chosen pins are available simultaneously with USB enabled, since USB pins are fixed. Finally, configure configuration fuses (oscillator, watchdog, brown-out) deliberately in code; defaults may not start the PLL needed for the 70 MIPS and USB clock domains.
When sampling with the 12-bit ADC at high rates, reference the ADC to a quiet VREF and add a small RC (e.g., 100 ohm + 1 nF, Estimated: values are design starting points, not datasheet requirements) at analog inputs to absorb sample-and-hold charge kickback. Separate the analog ground return from PWM-driven motor or power ground paths, joining them at a single star point. Use the ADC trigger-from-PWM mode so conversions occur away from switching edges, substantially reducing noise-induced conversion error.
Compliance Information
Compliance data was not explicitly stated in the verified web sources reviewed. Verify RoHS/REACH status on the official Microchip product page or distributor compliance documentation before design release.
