DSPIC33EP128MU502-I/MM - 16-bit DSC 128KB Flash USB | Microchip
N.º de pieza: DSPIC33EP128MU502-I/MM ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.2 | $6,20 |
| 10 | $5.58 | $55,80 |
| 100 | $4.96 | $496,00 |
| 500 | $4.45 | $2.225,00 |
| 1.000 | $3.98 | $3.980,00 |
DSPIC33EP128MU502-I/MM Descripción general
A Digital Signal Controller combines the computational capabilities of a digital signal processor with the control peripherals and ease of use of a microcontroller. In the embedded systems hierarchy, the DSC sits between a general-purpose microcontroller (MCU) and a dedicated DSP, making it well suited for real-time control loops that also require math-intensive signal processing, such as digital power conversion and motor control.
Key features of the DSPIC33EP128MU502 include its modified Harvard architecture 16-bit core executing at up to 70 MIPS, DSP engine with single-cycle MAC and 40-bit accumulators, and integrated USB OTG support for device, host, and dual-role designs. The part also integrates multiple UART, SPI, and I2C peripherals, a flexible output-compare/input-capture system, and high-speed PWM outputs suitable for power electronics.
Architecturally, the dsPIC33EP family uses deterministic single-cycle instruction execution with zero-overhead DO and REPEAT loops, allowing filtering and control algorithms to run predictably. The 12-bit ADC with multiple sample-and-hold channels enables simultaneous sampling of current and voltage feedback signals in closed-loop converters.
Typical applications include digital power supplies, USB-connected industrial instruments, battery chargers, BLDC/PMSM motor control drives, and audio signal processing nodes where USB connectivity plus DSP math in a compact 28-pin footprint is valuable.
For design, the MM QFN package requires a solid ground plane and thermal vias under the exposed pad; decouple all VDD pins with 100 nF ceramics placed as close as possible to each supply pin.
This page synthesizes distributor pricing, drop-in alternatives within the dsPIC33EP family, pinout data, and practical design notes not found on the manufacturer product page.
Alternativas directas para DSPIC33EP128MU502-I/MM — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con DSPIC33EP128MU502-I/MM (mismo factor de forma y huella) — difiere en Package, Operating Temperature, Timers, Communication Interfaces, Core.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
DSPIC33EP128GP502-I/MM
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$3.44 / unidad
Ver hoja de datos →DSPIC33EP64MU502-I/MM
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
DSPIC33EP32MU502-I/MM
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
DSPIC33EP128MC502-I/MM
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
DSPIC33EP128MC202T-E/MM
✅ Sustitución directa✓ En stock
$3.41 / unidad
Ver hoja de datos →DSPIC33EP128MU502-I/MM Valores máximos y características eléctricas
| Core Architecture | 16-bit dsPIC33EP DSC, modified Harvard |
| Program Memory (Flash) | 128 KB |
| RAM | 16 KB |
| Max Core Speed | 70 MIPS |
| ADC Resolution | 12-bit |
| USB Interface | USB 2.0 full-speed OTG (device/host/dual role) |
| Encapsulado | 28-pin QFN (MM), 6x6 mm |
| Temperatura de funcionamiento | -40C to +85C (industrial, I suffix) |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Communication Peripherals | UART, SPI, I2C |
| Timers | Multiple 16-bit timers + output compare / input capture |
| PWM | High-speed PWM / motor control PWM outputs |
| Tipo de montaje | Surface Mount |
| Programming / Debug | ICSP via MPLAB (ICD 3, PICkit 3, SNAP) |
| Estado RoHS | Compliant |
Configuración de pines de DSPIC33EP128MU502-I/MM
| Pin 1 | MCLR — Master clear reset / programming voltage input |
| Pin 2 | AN0/CN2/RB0 — Analog input 0 / change notification / port B bit 0 |
| Pin 3 | AN1/CN3/RB1 — Analog input 1 / change notification / port B bit 1 |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select / port B bit 2 |
| Pin 5 | AN3/IND/CN5/RB3 — Analog input 3 / comparator input / port B bit 3 |
| Pin 6 | AN4/C1IN-/CN6/RB4 — Analog input 4 / comparator 1 inverting input / port B bit 4 |
| Pin 7 | VDD — Power supply (3.0-3.6 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN7/RA2 — Oscillator crystal input / external clock input |
| Pin 10 | OSC2/CLKO/CN8/RA3 — Oscillator crystal output / clock output |
| Pin 11 | AN5/C1IN+/CN11/RB5 — Analog input 5 / comparator 1 non-inverting input / port B bit 5 |
| Pin 12 | VDD — Power supply (second VDD pin) |
| Pin 13 | VSS — Ground reference (second VSS pin) |
| Pin 14 | VCAP/VDDCORE — Core voltage regulator external capacitor - do not omit |
| Pin 15 | PGD1/RP35/RB13 — Programming data 1 / remappable pin / port B bit 13 |
| Pin 16 | PGC1/RP36/RB14 — Programming clock 1 / remappable pin / port B bit 14 |
| Pin 17 | RP37/RB15 — Remappable pin / port B bit 15 |
| Pin 18 | RP20/RD0/CN15 — Remappable pin / port D bit 0 |
| Pin 19 | RP21/RD1/CN16 — Remappable pin / port D bit 1 |
| Pin 20 | RP22/RD2/CN17 — Remappable pin / port D bit 2 |
| Pin 21 | RP23/RD3/CN18 — Remappable pin / port D bit 3 |
| Pin 22 | RP24/RD4/CN19 — Remappable pin / port D bit 4 |
| Pin 25 | VUSB3V3 — USB transceiver 3.3 V supply - connect 3.3 V via ferrite when USB is used |
| Pin 26 | D- — USB differential data minus |
| Pin 27 | D+ — USB differential data plus |
| Pin 28 | EP — Exposed thermal pad - connect to VSS ground plane |
Aplicaciones típicas
DSPIC33EP128MU502-I/MM es adecuado para 6 aplicacións: Digital Power Supplies, USB-Connected Industrial Instruments, BLDC / PMSM Motor Control Drives, Battery Charging Systems, Audio Signal Processing Nodes, Embedded IoT Sensor Nodes.
Digital Power Supplies
The DSPIC33EP128MU502-I/MM fits digital power conversion (AC-DC, DC-DC, LLC, PFC stages) because its 16-bit core runs control loops at up to 70 MIPS with deterministic single-cycle execution, while the DSP engine performs PI/PID and filtering math with single-cycle MAC operations. The integrated 12-bit ADC provides the fast, accurate feedback sampling of output voltage and inductor current that closed-loop converters require. In a typical topology, the ADC samples the error signal each switching period and the DSC updates the PWM duty cycle within the same cycle, achieving control-loop bandwidths impractical for analog-only compensation at low cost. USB OTG additionally enables field commissioning and firmware updates from a host PC without extra interface chips.
Recomendado
USB-Connected Industrial Instruments
For hand-held meters, data loggers, and bench instruments that must communicate with a PC, the full-speed USB 2.0 OTG module eliminates external USB-interface ICs, reducing BOM cost and board area in the compact 28-pin QFN footprint. The 128 KB Flash accommodates a USB stack alongside the application firmware and data-acquisition routines, and the 16 KB RAM buffers measurement records. The 12-bit ADC digitizes sensor inputs directly, while UART/SPI/I2C peripherals connect front-end components such as precision ADCs or displays. Because the part supports device, host, and dual-role operation, the same PCB can act as a PC peripheral or as a standalone logger reading USB flash media.
Recomendado
BLDC / PMSM Motor Control Drives
Sensorless BLDC and PMSM drives benefit from the DSPIC33EP128MU502's combination of high-speed PWM output-compare channels, fast 12-bit ADC for phase-current sampling, and DSP math for field-oriented control transforms and state observers. At 70 MIPS, the Clarke/Park transforms and PI current loops execute well within a 20 kHz switching period. USB OTG allows drive tuning, telemetry streaming, and firmware updates over the same connector used for power-up commissioning, which shortens development cycles in industrial drives. The -40C to +85C industrial rating suits motor-drive enclosures where ambient temperatures rise significantly during continuous operation.
Recomendado
Battery Charging Systems
Smart chargers for Li-ion, LiFePO4, and lead-acid packs use the DSPIC33EP128MU502-I/MM to run charging state machines and constant-current/constant-voltage regulation with the 12-bit ADC monitoring pack voltage, current, and temperature via NTC channels. USB OTG is a natural fit: the charger can negotiate USB battery-charging profiles with a host while managing the power path, and the DSC's Flash self-programming supports field-updatable charge profiles as cell chemistries evolve. The 3.0-3.6 V supply range maps directly to standard 3.3 V LDO or buck-derived rails, and the QFN-28 footprint keeps charger PCBs compact enough for wall-adapters and power-bank form factors.
Recomendado
Audio Signal Processing Nodes
The DSP engine with 40-bit accumulators and single-cycle MAC enables real-time audio filtering, equalization, and loudness control at the sample rates typical of professional audio (48-96 kHz). The DSPIC33EP128MU502-I/MM pairs USB OTG with audio-over-USB device classes so a single chip can implement a USB audio interface plus onboard DSP processing - a common architecture for USB microphones, small mixers, and active speakers. The 12-bit ADC handles control surface inputs (pots, switches) and auxiliary analog signals, while UART/SPI/I2C connect external audio codecs. Deterministic execution avoids glitchy processing artifacts that interrupt-latency-sensitive audio paths demand.
Recomendado
Embedded IoT Sensor Nodes
Industrial IoT gateways and sensor nodes use the DSPIC33EP128MU502-I/MM to perform local signal conditioning (FFT, RMS computation, thresholding) on sensor data before transmission, reducing upstream bandwidth. SPI and I2C connect external radios, EEPROM, and sensors; UART links to modem modules. USB OTG provides a maintenance port for configuration and log retrieval in the field. With 128 KB Flash, a complete TCP/Modem stack plus a DSP pre-processing pipeline fits alongside the application. The QFN-28 package suits compact node PCBs, and the industrial temperature grade supports outdoor and factory-floor deployments from -40C to +85C.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para DSPIC33EP128MU502-I/MM — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | DSPIC33EP128GP502-I/MM | DSPIC33EP64MU502-I/MM | DSPIC33EP32MU502-I/MM | DSPIC33EP128MC502-I/MM | DSPIC33EP128MC202T-E/MM |
|---|---|---|---|---|---|---|
| Package | 28-pin QFN (MM) | 28-pin QFN (MM) - same | 28-pin QFN (MM) - same | 28-pin QFN (MM) - same | 28-pin QFN (MM) - same | 28-pin QFN (MM) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 64 KB | 32 KB | 128 KB | 128 KB |
| USB OTG Module | Yes (full-speed USB 2.0 OTG) | No | Yes | Yes | No | No |
| Core 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 |
| Temperature Grade | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) |
Diferenciadores clave
- Integrated USB 2.0 full-speed OTG (frente a DSPIC33EP128GP502-I/MM)
- Double the Flash of the MU64 variant (frente a DSPIC33EP64MU502-I/MM)
- USB plus general-purpose mix vs motor-control specialization (frente a DSPIC33EP128MC502-I/MM)
Notas de diseño
The QFN-28 (MM) package has an exposed pad (EP) that must be soldered to the ground plane for both electrical and thermal performance. Use a 3x3 via array under the EP pad connecting to the internal ground pour. The two VDD pins (7, 12) each need a 100 nF ceramic capacitor placed within 2 mm of the pin, plus one 4.7-10 uF bulk capacitor near the device. The VCAP/VDDCORE pin (14) requires the exact capacitance value specified in the datasheet - typically a low-ESR ceramic - and must never be loaded externally.
The USB D+/D- pair (pins 26/27) must be routed as a 90-ohm differential pair with length matching within 1 mm and a solid uninterrupted ground reference beneath. Decouple VUSB3V3 with 100 nF plus 1 uF through a ferrite bead from the main 3.3 V rail to keep USB eye diagrams compliant with full-speed USB 2.0. Avoid routing USB traces near the crystal oscillator or high-di/dt PWM traces to prevent jitter and crosstalk.
Do not configure RB0-RB5 analog-capable pins as digital I/O without clearing their ANSEL bits - the POR default is analog, which makes digital reads return 0 and is a frequent first-bring-up failure on dsPIC33EP parts. Also remember that PGC1/PGD1 (pins 16/15) are shared with ICSP programming: if your application drives these pins, add series isolation resistors so the programmer can control them during debug.
Información de cumplimiento
RoHS compliance listed by broker sources (Jotrin, full-electronic). REACH/halogen-free/conflict-minerals declarations should be requested from Microchip's official compliance portal.
