DSPIC33EP128MU502-H/SP - 16-bit DSC 128KB Flash 70MIPS | Microchip
MPN: DSPIC33EP128MU502-H/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
DSPIC33EP128MU502-H/SP Overview
A digital signal controller combines the computational architecture of a digital signal processor with the peripherals and ease of use of a microcontroller. DSCs sit within the broader embedded processor hierarchy - microcontroller, then DSC, then system-on-chip - offering single-cycle MAC and DSP instructions while retaining conventional MCU peripherals such as UART, SPI, I2C, PWM, and CAN.
Key features of this device include the high-performance 16-bit dsPIC33E core rated at 70 MIPS, 128 KB of self-programmable Flash with ECC, 16 KB of SRAM, dual 12-bit ADC modules, multiple 16-bit timers, and communication peripherals including USB and CAN for the MU (USB/media) family variant. The H temperature grade supports extended operating conditions, and the SPDIP package suits prototyping, legacy through-hole boards, and industrial control retrofits.
The dsPIC33EP architecture uses a modified Harvard pipeline with deterministic interrupt latency, hardware DSP engine (single-cycle multiply-accumulate), and Peripheral Pin Select (PPS) for flexible I/O mapping. Code development is supported by Microchip MPLAB X IDE and the XC16 compiler, with drop-in code compatibility across the dsPIC33EP family.
Typical applications include industrial motor control, digital power supplies (switching converters with MC PWM), USB-connected sensor hubs, audio processing nodes, and general-purpose embedded control requiring DSP-class math.
A key design consideration: the dsPIC33EP core requires a VCAP/VDDCORE stabilization capacitor on the internal regulator pin - omitting it is a common bring-up failure. Note this part is listed as discontinued at DigiKey; pricing is RFQ-based from independent distributors.
This page synthesizes distributor availability, drop-in family alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet, as of 2026-09-24.
Drop-in alternatives for DSPIC33EP128MU502-H/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 DSPIC33EP128MU502-H/SP (same form factor and footprint) — differing in Package, Core, Mounting Type, ADC Resolution, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128MU502-E/SP
✅ Drop-In✓ In Stock
$4.55 / Unit
View Datasheet →DSPIC33EP64MU502-H/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64MU502-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128GP502-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC502-I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.55 / Unit
View Datasheet →DSPIC33EP128MU502-H/SP Maximum Ratings & Electrical Characteristics
| Core | 16-bit dsPIC33E |
| Core Speed | 70 MIPS |
| Flash Program Memory | 128 KB |
| RAM | 16 KB |
| Data Flash (EEPROM) | 1 KB |
| ADC Resolution | 12-bit |
| Package | 28-pin SPDIP (0.300 in) |
| Mounting Type | Through Hole |
| Packaging | Tube |
| Connectivity Peripherals | UART, SPI, I2C, CAN, USB |
| Analog Peripherals | 12-bit ADC, 3x Op-Amp, CTMU |
| Motor Control Peripherals | MC PWM, QEI, PTG |
| Operating Voltage | 3.0 V to 3.6 V |
| Oscillator Type | Internal + External (OSC1/OSC2) |
DSPIC33EP128MU502-H/SP Pin Configuration
| Pin 1 | MCLR/VPP/RE3 — Master clear reset and programming voltage input |
| Pin 2 | AN0/VREF+/CN2B/RB0 — Analog input 0 / positive voltage reference |
| Pin 3 | AN1/VREF-/CN3B/RB1 — Analog input 1 / negative voltage reference |
| Pin 4 | AN2/SS1/CN4B/RB2 — Analog input 2 / SPI slave select |
| Pin 5 | AN3/C1IN+/INDAC/CN5B/RB3 — Analog input 3 / comparator input |
| Pin 6 | AN4/C1IN-/CN6B/RB4 — Analog input 4 / comparator inverting input |
| Pin 7 | VDD — Positive supply (3.0 V to 3.6 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN7B/RA2 — Oscillator crystal input / external clock input |
| Pin 10 | OSC2/CLKO/CN8B/RA3 — Oscillator crystal output / clock output |
| Pin 11 | VCAP/VDDCORE — Internal core regulator stabilization capacitor |
| Pin 12 | RP15/RD6 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 13 | RP14/RD5 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 14 | RP13/RD4 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 15 | RP12/RD3 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 16 | RP11/RD2 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 17 | RP10/RD1 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 18 | RP9/RD0 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 19 | RP26/RG7 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 20 | RP24/RG6 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 21 | RP23/RF4 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 22 | RP22/RF5 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 23 | RP21/RF2 — Remappable digital I/O / UART/CAN mapping (verify in datasheet) |
| Pin 24 | RP20/RF3 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 25 | RP19/RF1 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 26 | RP18/RF0 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 27 | RP17/RF13 — Remappable digital I/O (verify RPx mapping in datasheet) |
| Pin 28 | VDD — Positive supply |
Typical Applications
DSPIC33EP128MU502-H/SP is suitable for 6 applications: Industrial Motor Control, USB-Connected Sensor Hubs, Digital Power Supplies, Audio Signal Processing Nodes, Legacy Through-Hole Board Retrofits, Embedded Test and Measurement Instruments.
Industrial Motor Control
The DSPIC33EP128MU502-H/SP fits motor control because it combines 70 MIPS DSP throughput (enough for single-shunt FOC loops at 10-20 kHz PWM rates) with dedicated MC PWM modules offering complementary outputs, dead-time insertion, and fault inputs, plus a QEI for position feedback. The internal 12-bit ADC samples phase currents synchronously with PWM triggers, and the 3 on-chip op-amps can amplify shunt voltages without external amplifiers, reducing BOM cost. Typical topology: the DSC drives a 3-phase inverter gate-driver stage, sampling current each PWM cycle; the PTG automates ADC-PWM triggering for low CPU overhead. The through-hole SPDIP package also simplifies prototyping of drive boards.
Recommended
USB-Connected Sensor Hubs
The MU-family USB peripheral on the DSPIC33EP128MU502 makes it a natural USB device-side controller for sensor aggregation nodes. With 16 KB RAM, the device buffers multiple ADC channels at 12-bit resolution while servicing USB bulk transfers, and the 70 MIPS core applies filtering (IIR/FIR via the DSP engine's single-cycle MAC) before upload. PPS (Peripheral Pin Select) lets designers route UART/SPI streams from external sensors to any free RP pin, easing board layout. In a typical design the part enumerates as a USB CDC device, streaming calibrated telemetry; the 128 KB Flash holds both USB stack and DSP processing code with room to spare.
Recommended
Digital Power Supplies
For digitally controlled AC/DC and DC/DC converters, the DSPIC33EP128MU502 provides high-resolution MC PWM outputs, fast 12-bit ADC triggering, and DSP bandwidth for control loops (voltage-mode, current-mode, or average-current control) at switching frequencies from 100 kHz to 1 MHz with appropriate loop design. The CTMU supports precise measurements, and the deterministic 70 MIPS core executes compensator equations within one PWM period. The through-hole 28-SP package suits bench power-supply prototypes and educational digital-power platforms; production high-density designs often migrate to the same code on smaller SMD siblings without firmware changes.
Recommended
Audio Signal Processing Nodes
The MU (USB/media) variant targets audio applications: the 70 MIPS core with DSP instruction set implements filters, mixers, and codec preprocessing, while the USB peripheral handles audio streaming classes to a host PC. With 16 KB RAM, delay lines and multi-band filter state variables fit comfortably, and the 128 KB Flash retains room for a USB audio stack. On-chip op-amps can condition microphone or line-level inputs. In practice the DSC sits between an I2S/UART-connected codec and the USB host, performing room equalization or echo cancellation; the DSP engine executes biquad sections in a few cycles each, leaving margin for control tasks.
Recommended
Legacy Through-Hole Board Retrofits
The 28-pin SPDIP (0.300 in) through-hole package makes the DSPIC33EP128MU502-H/SP uniquely valuable for retrofitting older industrial equipment designed around DIP microcontrollers. It drops into standard 0.6-inch-wide DIP-28 sockets, allowing performance upgrades (70 MIPS, DSP math, USB/CAN) without PCB respins. PPS remapping lets the firmware adapt to existing board wiring rather than forcing trace changes. Given the part's mixed authorized/independent availability, retrofitters should secure lifetime-buy quantities with verified date codes; the pin-compatible E/SP and 64MU502 variants provide ongoing sourcing flexibility for the same socket.
Recommended
Embedded Test and Measurement Instruments
In handheld and bench instruments, the DSPIC33EP128MU502-H/SP performs ADC acquisition (12-bit, multiple channels), DSP-based measurement math (RMS, FFT windowing via single-cycle MAC), and USB data upload to a PC host. The 16 KB RAM supports waveform capture buffers of thousands of samples at 12-bit resolution, while the CTMU provides precision time and charge measurement functions for capacitance or time-domain measurements. The deterministic interrupt latency ensures accurate trigger timing. The through-hole package and 3.3 V operation simplify battery-powered instrument design, and the 128 KB Flash accommodates menu-driven UI firmware alongside measurement routines.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128MU502-H/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128MU502-E/SP | DSPIC33EP64MU502-H/SP | DSPIC33EP128GP502-I/SP | DSPIC33EP128MC502-I/SP |
|---|---|---|---|---|---|
| Package | 28-pin SPDIP (0.300 in) | 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 / Speed | 16-bit dsPIC33E, 70 MIPS | 16-bit dsPIC33E, 70 MIPS | 16-bit dsPIC33E, 70 MIPS | 16-bit dsPIC33E, 70 MIPS | 16-bit dsPIC33E, 70 MIPS |
| Flash Program Memory | 128 KB | 128 KB | 64 KB (-50%) | 128 KB | 128 KB |
| USB Peripheral | Yes (MU media variant) | Yes | Yes | No (GP variant) | No (MC variant) |
| ADC | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Temperature Grade | H (extended/high temp) | E (extended, -40C to +125C) | H | I (industrial, -40C to +85C) | I (industrial) |
Key Differentiators
- USB + media peripheral set in a 28-pin DIP (vs DSPIC33EP128GP502-I/SP)
- Double the program memory of the 64 KB sibling (vs DSPIC33EP64MU502-H/SP)
- Extended high-temperature grade availability (vs DSPIC33EP128MC502-I/SP)
Design Notes
The dsPIC33EP core regulator requires a low-ESR capacitor (nominally 10 uF tantalum/ceramic plus a 0.1 uF ceramic in parallel) on the VCAP/VDDCORE pin, pin 11, placed within a few millimeters of the pin. Omitting or undersizing this capacitor causes erratic operation, brown-out resets, or failure to program. Decouple each VDD pin with 0.1 uF ceramic close to the pin, and keep VSS connections low-impedance. Per Microchip hardware design guidelines, avoid routing noisy PWM return currents under the VCAP node.
Because the SPDIP package is through-hole, use a clean ground grid or ground pour on the solder side and place the 0.1 uF VDD decouplers directly at pins 7 and 28. When using the on-chip op-amps or ADC, route analog inputs away from PWM and CAN traces; the AN0-AN4 pins (2-6) share proximity with remappable digital pins, so configure unused digital neighbors to output-low or input with weak pull-up to reduce crosstalk. Reserve space for a 2x5 ICSP header wired to MCLR, PGD, and PGC for in-circuit programming.
Common bring-up failures: (1) MCLR left floating - always fit a 10 kOhm pull-up to VDD; (2) forgetting that PPS (Peripheral Pin Select) must map UART/SPI/PWM to RP pins in software before the peripherals function; (3) exceeding 3.6 V absolute maximum on VDD when interfacing 5 V logic - use level shifters or series resistors with clamping. Additionally, this exact suffix is discontinued at DigiKey; for new production designs, verify the E/SP or I-temp variants' availability and qualify them early.
Compliance Information
Compliance data not explicitly stated in verified web data for this exact suffix; modern dsPIC33EP production is typically lead-free/RoHS-compliant but must be confirmed via Microchip Certificate of Conformance for this ordering code.
