DSPIC33EP128MU506T-I/MR - 16-bit 70 MIPS DSC 128KB USB | Microchip
MPN: DSPIC33EP128MU506T-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.95 | $6.95 |
| 10 | $6.32 | $63.20 |
| 100 | $5.64 | $564.00 |
| 500 | $5.18 | $2,590.00 |
| 1,000 | $4.72 | $4,720.00 |
DSPIC33EP128MU506T-I/MR Overview
A digital signal controller combines the computational architecture of a microcontroller with the math acceleration of a DSP, sitting in the system hierarchy between general-purpose MCUs and dedicated DSPs. The dsPIC33EP family pairs a 16-bit pipelined core with DSP instructions, an on-chip regulator, and rich analog and communication peripherals, making it a power-management-oriented single-chip solution.
Key features include the 70 MIPS dsPIC33E core, 128 KB Flash and up to 32 KB of on-chip RAM for USB buffering and control, full-speed USB 2.0 OTG, multiple UART/SPI/I2C ports with PPS (Peripheral Pin Select) remapping, high-speed PWM, and an internal oscillator. The industrial temperature grade (-40C to +85C) suits harsh environments.
Architecturally, the MU-series emphasizes connectivity: USB OTG operates in host, device, or dual-role modes, while the DMA controller and 16-channel PPS enable flexible pin assignment without external glue logic. The 3.0V to 3.6V supply is handled by an integrated regulator, simplifying power-tree design.
Typical applications include USB-connected industrial instruments, motor control panels with USB commissioning ports, and audio or data-logging peripherals.
Design consideration: budget Flash endurance and USB compliance testing early; the VQFN-64 thermal pad requires a solid ground pour.
This page synthesizes distributor stock data, same-family drop-in alternatives, and design notes beyond the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP128MU506T-I/MR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256MU506T-I/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64MU506-I/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MU505T-I/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC506T-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.9 / Unit
View Datasheet →DSPIC33EP128GP506T-I/MR
✅ Drop-In✓ In Stock
$2.98 / Unit
View Datasheet →DSPIC33EP128MU506T-I/MR Maximum Ratings & Electrical Characteristics
| Core | dsPIC33E, 16-bit DSC |
| Maximum CPU Speed | 70 MIPS |
| Program Memory Size | 128 KB (43K x 24) Flash |
| USB | USB 2.0 full-speed OTG (host/device/dual role) |
| Operating Temperature | -40C to +85C (industrial, I-grade) |
| Package | 64-VQFN (9x9 mm), MR suffix |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Series | dsPIC33EP128MU506 |
| Communication Interfaces | USB OTG, UART, SPI, I2C |
| Pin Remapping | PPS (Peripheral Pin Select) |
| Timers / PWM | High-speed PWM, core timers |
| Oscillator | Internal FRC + external crystal options |
DSPIC33EP128MU506T-I/MR Pin Configuration
| Pin 1 | MCLR — Master clear reset input |
| Pin 2 | AN0/VREF+/RB0 — Analog input 0 / positive voltage reference / port B bit 0 |
| Pin 3 | AN1/VREF-/RB1 — Analog input 1 / negative voltage reference / port B bit 1 |
| Pin 4 | AN2/RB2 — Analog input 2 / port B bit 2 (remappable RPx) |
| Pin 5 | AN3/RB3 — Analog input 3 / port B bit 3 (remappable RPx) |
| Pin 6 | AN4/RB4 — Analog input 4 / port B bit 4 (remappable RPx) |
| Pin 7 | AN5/RB5 — Analog input 5 / port B bit 5 (remappable RPx) |
| Pin 8 | AVDD — Analog supply voltage |
| Pin 9 | AVSS — Analog ground |
| Pin 10 | AN6/RB6 — Analog input 6 / port B bit 6 (remappable RPx) |
| Pin 11 | AN7/RB7 — Analog input 7 / port B bit 7 (remappable RPx) |
| Pin 12 | AN8/RB8 — Analog input 8 / port B bit 8 (remappable RPx) |
| Pin 13 | AN9/RB9 — Analog input 9 / port B bit 9 (remappable RPx) |
| Pin 14 | AN10/RB10 — Analog input 10 / port B bit 10 (remappable RPx) |
| Pin 15 | AN11/RB11 — Analog input 11 / port B bit 11 (remappable RPx) |
| Pin 16 | AN12/RB12 — Analog input 12 / port B bit 12 (remappable RPx) |
| Pin 17 | AN13/RB13 — Analog input 13 / port B bit 13 (remappable RPx) |
| Pin 18 | AN14/RB14 — Analog input 14 / port B bit 14 (remappable RPx) |
| Pin 19 | AN15/RB15 — Analog input 15 / port B bit 15 (remappable RPx) |
| Pin 20 | VDD — Digital supply voltage |
| Pin 21 | VSS — Digital ground |
| Pin 22 | RC1 — Port C bit 1 (remappable RPx) |
| Pin 23 | RC2 — Port C bit 2 (remappable RPx) |
| Pin 24 | RC3 — Port C bit 3 (remappable RPx) |
| Pin 25 | RC4 — Port C bit 4 (remappable RPx) |
| Pin 26 | RC5 — Port C bit 5 (remappable RPx) |
| Pin 27 | RC6 — Port C bit 6 (remappable RPx) |
| Pin 28 | RC7 — Port C bit 7 (remappable RPx) |
| Pin 29 | RC8 — Port C bit 8 (remappable RPx) |
| Pin 30 | RC9 — Port C bit 9 (remappable RPx) |
| Pin 31 | RC10 — Port C bit 10 (remappable RPx) |
| Pin 32 | RC11 — Port C bit 11 (remappable RPx) |
| Pin 33 | RC12 — Port C bit 12 (remappable RPx) |
| Pin 34 | RC13 — Port C bit 13 (remappable RPx) |
| Pin 35 | RC14 — Port C bit 14 (remappable RPx) |
| Pin 36 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Pin 37 | OSC2/CLKO/RC15 — Crystal oscillator output / clock output / port C bit 15 |
| Pin 38 | VDD — Digital supply voltage |
| Pin 39 | VSS — Digital ground |
| Pin 40 | RD0 — Port D bit 0 (remappable RPx) |
| Pin 41 | RD1 — Port D bit 1 (remappable RPx) |
| Pin 42 | RD2 — Port D bit 2 (remappable RPx) |
| Pin 43 | RD3 — Port D bit 3 (remappable RPx) |
| Pin 44 | RD4 — Port D bit 4 (remappable RPx) |
| Pin 45 | RD5 — Port D bit 5 (remappable RPx) |
| Pin 46 | RD6 — Port D bit 6 (remappable RPx) |
| Pin 47 | RD7 — Port D bit 7 (remappable RPx) |
| Pin 48 | RD8 — Port D bit 8 (remappable RPx) |
| Pin 49 | RD9 — Port D bit 9 (remappable RPx) |
| Pin 50 | RD10 — Port D bit 10 (remappable RPx) |
| Pin 51 | RD11 — Port D bit 11 (remappable RPx) |
| Pin 52 | RD12 — Port D bit 12 (remappable RPx) |
| Pin 53 | RD13 — Port D bit 13 (remappable RPx) |
| Pin 54 | RD14 — Port D bit 14 (remappable RPx) |
| Pin 55 | RD15 — Port D bit 15 (remappable RPx) |
| Pin 56 | RE0 — Port E bit 0 (remappable RPx) |
| Pin 57 | RE1 — Port E bit 1 (remappable RPx) |
| Pin 58 | RE2 — Port E bit 2 (remappable RPx) |
| Pin 59 | VDD — Digital supply voltage |
| Pin 60 | VSS — Digital ground |
| Pin 61 | VCAP/VDDCORE — Internal regulator capacitor connection |
| Pin 62 | VUSB3V3 — USB 3.3V supply for USB transceiver |
| Pin 63 | D+ — USB differential data positive |
| Pin 64 | D- — USB differential data negative |
Typical Applications
DSPIC33EP128MU506T-I/MR is suitable for 6 applications: USB-Connected Industrial Instruments, Motor Control with USB Commissioning, Data Logging Peripherals, Audio and USB Audio Class Devices, Building Automation Controllers, Portable Measurement Devices.
USB-Connected Industrial Instruments
The DSPIC33EP128MU506T-I/MR fits industrial instruments that require a USB commissioning or data port because its full-speed USB 2.0 OTG block removes the need for an external USB interface chip, saving board area and BOM cost. The 70 MIPS core and 128 KB Flash execute measurement, calibration, and protocol tasks concurrently, while Peripheral Pin Select lets designers route UART/SPI traffic without PCB respins. Typically used as a single-chip data-acquisition front end: sensors attach to remappable analog and digital pins, DMA streams samples to USB buffers, and the industrial -40C to +85C rating covers factory-floor temperature extremes. The main trade-off versus a non-USB controller is USB compliance testing, which is a one-time engineering cost.
Recommended
Motor Control with USB Commissioning
Motor-drive boards benefit from the DSPIC33EP128MU506T-I/MR because the dsPIC33EP core provides DSP math for field-oriented control at 70 MIPS while the high-speed PWM module drives three-phase inverters. The added USB OTG port gives manufacturing and service teams a single-connector channel for firmware updates, parameter tuning, and fault logging. Quadrature encoder or hall inputs attach through remappable pins, and DMA keeps control-loop sampling deterministic. Compared with the MC-series sibling DSPIC33EP128MC506, the MU part trades some motor-specific peripheral emphasis for the on-chip USB PHY; for products that need both control and connectivity in one chip at 128 KB Flash, it is an efficient choice.
Recommended
Data Logging Peripherals
For data loggers that offload to USB flash drives, the DSPIC33EP128MU506T-I/MR operates USB OTG in host mode, reading and writing mass-storage devices without a host PC. The 128 KB Flash holds the FAT file-system stack alongside application logic, and the RAM budget supports multi-buffer USB transfers with DMA. Remappable SPI and I2C ports connect flash, EEPROM, and sensor banks, while the internal oscillator allows crystal-free designs when timing tolerance permits. The 64-pin VQFN (9x9 mm) keeps the board compact for enclosures. Designers should budget the 3.x V supply and ensure VCAP and VUSB3V3 decoupling per the datasheet for reliable USB eye compliance across the -40C to +85C range.
Recommended
Audio and USB Audio Class Devices
The DSPIC33EP128MU506T-I/MR serves USB audio accessories by combining the full-speed USB 2.0 OTG peripheral with a DSP core capable of executing filtering and gain math on streaming samples. The 70 MIPS throughput supports stereo processing with headroom, while DMA-fed USB endpoints keep isochronous transfers jitter-free. Remappable SPI/I2S-style interfaces connect audio codecs, and the 128 KB Flash stores descriptors, DSP routines, and control firmware in one image. The industrial temperature grade suits professional and installed-audio equipment. The main design consideration is managing the shared RAM between USB buffering and DSP scratch memory, which usually requires careful buffer sizing and ping-pong schemes in firmware.
Recommended
Building Automation Controllers
Building automation nodes use the DSPIC33EP128MU506T-I/MR as the main controller when a USB service port simplifies installation and diagnostics. The 16-bit core at 70 MIPS runs control logic, communication stacks, and scheduling in parallel, and multiple UART, SPI, and I2C ports - each routable to nearly any pin through Peripheral Pin Select - connect sensors, displays, and sub-GHz or RS-485 links. The industrial -40C to +85C rating covers rooftop and mechanical-room environments, and the single-supply design with an internal regulator simplifies panel power. The 64-pin VQFN provides enough I/O for relay banks and sensor arrays without port expanders in typical zone-controller designs.
Recommended
Portable Measurement Devices
Battery-powered handheld instruments choose the DSPIC33EP128MU506T-I/MR for its single-chip integration of USB device connectivity, analog-capable remappable I/O, and a 3.x V supply rail that matches common lithium cell regulators. The 70 MIPS core executes digital filtering on ADC streams in real time, and the 64-pin VQFN (9x9 mm) footprint keeps the PCB small enough for pen-style form factors. USB OTG lets the instrument recharge data offload sessions by plugging directly into PCs or phones with OTG adapters. Design attention should go to power-budget profiling, since USB operation raises average current; sleep and idle modes plus peripheral gating recover battery life during measurement gaps.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128MU506T-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256MU506T-I/MR | DSPIC33EP64MU506-I/MR | DSPIC33EP128MU505T-I/MR | DSPIC33EP128MC506T-I/MR | DSPIC33EP128GP506T-I/MR |
|---|---|---|---|---|---|---|
| Package | 64-VQFN (9x9 mm, MR) | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 128 KB (43K x 24) | 256 KB | 64 KB | 128 KB | 128 KB | 128 KB |
| Operating Temperature | -40C to +85C (I-grade) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging | Tape & Reel | Tape & Reel | Tube/Tray | Tape & Reel | Tape & Reel | Tape & Reel |
| Peripheral Emphasis | USB connectivity | USB connectivity, more Flash | USB connectivity, cost-optimized | USB connectivity, fewer channels | Motor control | General purpose |
Key Differentiators
- On-chip USB 2.0 full-speed OTG (vs DSPIC33EP128GP506T-I/MR)
- Flash headroom upgrade path without respin (vs DSPIC33EP256MU506T-I/MR)
- Cost-optimized variant for memory-light firmware (vs DSPIC33EP64MU506-I/MR)
Design Notes
The dsPIC33EP integrates an on-chip regulator: connect the VCAP/VDDCORE pin to a low-ESR ceramic capacitor (per the datasheet-recommended value, typically around 10 uF) to ground, placed as close to the pin as possible. VUSB3V3 needs its own 3.3 V rail with decoupling when USB is used; do not back-drive it from the main 3.x V rail without a filter. Estimate: with the internal regulator handling core current, keep VDD within the datasheet 3.x V range to guarantee 70 MIPS operation across -40C to +85C.
The 64-VQFN (9x9 mm) package has a central exposed pad (thermal/electrical) that must be soldered to a ground pour with an array of vias - skipping this pad is the most common assembly defect for MR-suffix parts and causes both thermal and ground-integrity issues. For USB, keep the D+/D- pair as a 90-ohm matched differential route, short and away from the high-speed PWM traces. Follow the Microchip layout guidance in the family datasheet pin-diagram section for crystal placement.
Because this reel SKU is marked discontinued at some franchise distributors, new production should qualify DSPIC33EP256MU506T-I/MR (pin-compatible, more Flash) as a second source. Also: the MU-series uses Peripheral Pin Select for UART/SPI/PWM routing - always cross-check final RPx assignments against the family datasheet mapping tables before locking the PCB, since incorrect default pin assumptions are the top firmware bring-up failure on dsPIC33EP designs.
Compliance Information
Compliance data not stated in retrieved distributor listings for this exact reel SKU; verify against the Microchip product page or shipment certificate of conformance.
