DSPIC33EP128MU504-H/ML - 16-bit 70 MIPS DSC, 128KB Flash | Microchip
MPN: DSPIC33EP128MU504-H/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.16 | $61.60 |
| 100 | $5.48 | $548.00 |
| 500 | $4.92 | $2,460.00 |
| 1,000 | $4.45 | $4,450.00 |
DSPIC33EP128MU504-H/ML Overview
A digital signal controller combines the computational power of a DSP with the peripheral integration and deterministic control of a microcontroller. Within the embedded-systems hierarchy, the dsPIC33EP128MU504 sits in Microchip's dsPIC33EP family, which in turn belongs to the broader dsPIC33E series of 16-bit DSCs - a class of devices purpose-built for closed-loop control loops, digital power conversion, and signal processing tasks that a general-purpose MCU handles less efficiently.
Key differentiating features of this MU-series member include its high connectivity peripheral mix - multiple UART, SPI, and I2C ports - plus the 12-bit, multi-channel analog-to-digital converter that supports simultaneous sampling for motor-control feedback. The 70 MIPS dsPIC DSP engine includes two 40-bit accumulators, a 17-bit by 17-bit hardware multiplier, and DSP multiply-accumulate instructions for filtering and control algorithms.
Architecturally, the dsPIC33EP core is a modified Harvard design with a 16-bit data path and 24-bit instruction words, executing most instructions in a single cycle at up to 70 MIPS (with an internal PLL multiplying a 7.37 MHz internal FRC or external crystal to the maximum clock). The 128 KB self-programmable flash supports field firmware updates, while 16 KB of SRAM buffers control variables, communication stacks, and DSP working data.
Typical applications include brushless DC and PMSM motor control, digital power supplies and LED drivers, industrial automation nodes, sensor signal conditioning, and embedded control in HVAC and appliance systems. The high channel-count ADC and PWM-heavy peripheral set map directly onto these workloads.
A key design consideration: the -H/ML temperature-suffix option must be verified against your thermal environment, since the standard -I grade covers -40C to +85C; confirm the required operating range in the manufacturer datasheet before design freeze.
This page adds value beyond the datasheet by synthesizing distributor inventory data, drop-in same-family alternatives, pricing tiers, and practical design notes in one citable reference.
Drop-in alternatives for DSPIC33EP128MU504-H/ML — 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 DSPIC33EP128MU504-H/ML (same form factor and footprint) — differing in ADC Resolution, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128MU504-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.58 / Unit
View Datasheet →DSPIC33EP128MU504-E/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.25 / Unit
View Datasheet →DSPIC33EP256MU504-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64MU504-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC504-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MU504-H/ML Maximum Ratings & Electrical Characteristics
| Core | dsPIC33E 16-bit DSC |
| Maximum CPU Speed | 70 MIPS |
| Program Memory Size | 128 KB Flash |
| RAM Size | 16 KB |
| ADC Resolution | 12 bit |
| Package | QFN-44 (ML) |
| Mounting Type | Surface Mount |
| Communication Interfaces | UART, SPI, I2C |
| Internal Oscillator | 7.37 MHz internal FRC with PLL |
| Programmability | In-circuit serial programming (ICSP), self-programmable flash |
| Series | dsPIC33EP128MU504 |
| RoHS Status | Compliant |
| Data Bus Width | 16 bit |
DSPIC33EP128MU504-H/ML qfn-44 (ml) Pin Configuration Guide
Pin configuration for DSPIC33EP128MU504-H/ML (qfn-44 (ml) 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 DSPIC33EP128MU504-H/ML.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP128MU504-H/ML is suitable for 6 applications: BLDC and PMSM Motor Control, Digital Power Supplies and LED Drivers, Industrial Automation and Sensor Nodes, HVAC and Appliance Control, Embedded Audio and Signal Processing, Automotive-Adjacent and Harsh-Environment Control.
BLDC and PMSM Motor Control
The DSPIC33EP128MU504-H/ML fits motor-control designs that need fast control-loop execution: its 70 MIPS dsPIC33E core runs field-oriented control (FOC) algorithms with hardware multiply-accumulate and 40-bit accumulators, while the 12-bit multi-channel ADC samples phase currents and bus voltage with the deterministic timing required by current-loop bandwidths of several kHz. The MU-series peripheral mix supports communication with a host PLC or drive supervisor over UART or SPI, and the 128 KB flash holds FOC tables, commutation logic, and field-upgradable firmware. Placed on the same board as gate drivers and a current-shunt conditioning front end, the DSC closes digital current and speed loops entirely in firmware, eliminating external analog control circuitry; the trade-off is PCB care with ADC reference grounding to keep noise out of the current measurements.
Recommended
Digital Power Supplies and LED Drivers
In digitally controlled AC-DC, DC-DC, and high-power LED driver designs, the DSPIC33EP128MU504-H/ML replaces analog compensation networks with firmware: the 70 MIPS core executes voltage- and current-loop compensation at loop rates unattainable by slower 8-bit MCUs, and the 12-bit ADC digitizes output voltage, current, and temperature sensors for nonlinear control and protection. The 128 KB flash accommodates multiple operating profiles, soft-start sequences, and fault tables, while 16 KB of SRAM buffers telemetry for a UART-connected system monitor. Because digital control adapts compensation to load in real time, transient response can exceed what fixed analog loops achieve; the key design consideration is ADC sampling synchronization with the power-stage switching period to avoid beat-frequency noise on the feedback signal.
Recommended
Industrial Automation and Sensor Nodes
Factory automation nodes benefit from the connectivity emphasis of the MU-series: the DSPIC33EP128MU504-H/ML provides multiple UART, SPI, and I2C ports so a single DSC can bridge a sensor front end, a local HMI, and a plant network simultaneously. The 12-bit ADC conditions analog sensors such as pressure and temperature transmitters, while the 70 MIPS DSP engine runs digital filtering to clean noisy industrial signals before the data is transmitted. The 128 KB flash stores protocol stacks and multiple product configurations, and in-circuit programming enables field reconfiguration without desoldering. Industrial environments impose temperature and EMI stress, so choosing the appropriate temperature-grade suffix and adding input filtering on the ADC channels are the practical design steps that determine long-term field reliability.
Recommended
HVAC and Appliance Control
Appliance and HVAC controllers use the DSPIC33EP128MU504-H/ML to combine user-interface communication with motor and heater control on one chip: its UART and I2C ports talk to displays and touch panels, the 12-bit ADC reads NTC thermistors and pressure sensors for closed-loop temperature control, and the 70 MIPS core handles compressor or blower motor commutation. The 128 KB flash holds multiple regional firmware variants - useful for one hardware platform shipping worldwide - and self-programmable flash enables service-mode updates. QFN-44 mounting keeps the controller compact on crowded mainboards. The dominant design consideration is reliability under mains-borne transients: robust grounding, EMI filtering, and watchdog supervision should be applied per Microchip's dsPIC33E system-design guidance.
Recommended
Embedded Audio and Signal Processing
The DSP engine of the DSPIC33EP128MU504-H/ML - hardware 17x17 multiplier, two 40-bit accumulators, and single-cycle MAC instructions - executes FIR/IIR filtering, FFT-based analysis, and tone generation at 70 MIPS, sufficient for audio equalization, acoustic sensing, and instrumentation signal chains that do not justify a dedicated DSP. The 12-bit ADC digitizes microphone or sensor inputs, while the UART/SPI ports stream results to a host or drive external DACs. With 16 KB of RAM, moderate-length filter and buffer structures fit on-chip without external memory, simplifying the bill of materials. Developers should budget cycle time carefully: at 70 MIPS the headroom over real-time audio rates is comfortable for single-channel processing but tight for multi-channel high-rate streams, so algorithm profiling during design is essential.
Recommended
Automotive-Adjacent and Harsh-Environment Control
For control modules exposed to elevated ambient temperatures - off-highway equipment accessories, industrial machinery near heat sources, or heavy-duty charging infrastructure - the extended-temperature -E grade sibling (DSPIC33EP128MU504-E/ML) shares the same 44-pin QFN footprint, allowing one PCB design to be qualified across temperature grades by swapping the qualified DSC variant. The 12-bit ADC supports diagnostic monitoring of temperatures and currents, and the 70 MIPS core runs protection algorithms with the deterministic latency required for fault shutdown. Designers should derate clock frequency per the manufacturer's temperature-versus-speed curves where applicable, use the exposed QFN pad as a thermal ground plane, and confirm AEC qualification requirements independently, since harsh-environment automotive programs demand the appropriate qualification screen.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128MU504-H/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128MU504-I/ML | DSPIC33EP128MU504-E/ML | DSPIC33EP256MU504-I/ML | DSPIC33EP64MU504-I/ML | DSPIC33EP128MC504-I/ML |
|---|---|---|---|---|---|---|
| Package | QFN-44 (ML) | QFN-44 (ML) - same | QFN-44 (ML) - same | QFN-44 (ML) - same | QFN-44 (ML) - same | QFN-44 (ML) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 64 KB | 128 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB class | 8 KB class | 16 KB class |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| ADC Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Peripheral Emphasis | Connectivity (UART/SPI/I2C) | Connectivity (UART/SPI/I2C) | Connectivity (UART/SPI/I2C) | Connectivity (UART/SPI/I2C) | Connectivity (UART/SPI/I2C) | Motor control (advanced PWM) |
| Temperature Grade | -H suffix option | Industrial (-I) | Extended (-E, -40C to +125C) | Industrial (-I) | Industrial (-I) | Industrial (-I) |
Key Differentiators
- Memory-flexible pin-compatible family for BOM consolidation (vs DSPIC33EP256MU504-I/ML)
- Extended-temperature qualification option on the same die (vs DSPIC33EP128MU504-E/ML)
- 70 MIPS DSP engine versus slower 8-bit alternatives (vs PIC16LF15376-I/ML)
Design Notes
The 44-pin QFN (ML) package has an exposed pad beneath the die that must be soldered to a grounded copper pour. Design the land pattern per the Microchip QFN drawing in the dsPIC33EP datasheet, use a via array (typically 4-9 thermal vias) under the pad to tie it to internal ground planes, and verify paste stencil segmentation to prevent voiding. The exposed pad is the primary thermal and ground return path - omitting it degrades both ADC accuracy and junction temperature margin.
Decouple each VDD pin pair with 0.1 uF ceramic capacitors placed within 2 mm of the pins, plus one bulk capacitor (4.7-10 uF) near the device. Keep the ADC's reference and analog supply path separate from digital switching current returns; use a star or split-plane scheme per Microchip's dsPIC33EP family reference manual layout guidance. Clean analog supply routing directly determines 12-bit ADC effective resolution - switching noise from motor drivers sharing the board is the most common cause of ADC-code jitter.
Verify the -H temperature suffix against your thermal requirement before design freeze: the widely stocked -I and -E grades differ only in qualification range, but the -H variant has thinner distribution (Heisener is the primary listed source, price on RFQ). Also confirm that MPLAB X and your programmer (PICkit/ICD/SNAP) firmware support the 44-pin MU504 device, and budget MCLR programming-voltage access in your connector header - omitting the ICSP header forces socket-based reprogramming later.
Compliance Information
Distributor listings (Mouser, Hotenda) indicate RoHS-compliant, lead-free packaging for the dsPIC33EP128MU504 series; REACH, halogen-free, and conflict-minerals status were not stated in the provided data.
