DSPIC33EP128MU502-E/SP - 16-bit DSC 128KB USB CAN | Microchip
MPN: DSPIC33EP128MU502-E/SP β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.62 | $6.62 |
| 10 | $6.02 | $60.20 |
| 100 | $5.36 | $536.00 |
| 500 | $4.89 | $2,445.00 |
| 1,000 | $4.55 | $4,550.00 |
DSPIC33EP128MU502-E/SP Overview
A digital signal controller is a hybrid device that combines the compute architecture of a microcontroller with the mathematical acceleration of a digital signal processor. Within the power management and embedded control hierarchy, DSCs sit between general-purpose MCUs and dedicated DSPs, making them the natural choice for closed-loop control systems such as digital power supplies, motor drives, and power-conversion stages that require both fast multiply-accumulate throughput and rich peripherals.
Key features of the DSPIC33EP128MU502 include a 12-bit, 1.1 Msps analog-to-digital converter, three on-chip operational amplifiers, high-resolution PWM modules suitable for power conversion, a CTMU (Charge Time Measurement Unit) for capacitive touch and precision time measurement, and dual connectivity blocks: Full-Speed USB 2.0 device support and an ECAN module for CAN 2.0b networks.
Architecturally, the dsPIC33E core executes an enhanced 16-bit instruction set with DSP engine (17x17 multiplier, 40-bit accumulator, dual operand fetch), enabling filtering and control-loop math at up to 70 MIPS. Flash is self-programmable, supporting field firmware updates; the Extended-temperature (E) suffix guarantees operation across the full -40C to +125C automotive-grade range.
Typical applications include digital power supplies and PFC stages, brushless DC and PMSM motor control, USB-connected embedded-control nodes, and CAN-based automotive or industrial sensing modules where the wide temperature rating is mandatory.
Design consideration: the SPDIP package is ideal for prototyping and low-volume assembly, but its larger package limits thermal density versus SOIC/QFN siblings - verify dissipation at 70 MIPS operation.
This page adds distributor stock visibility, drop-in same-family alternatives, and selection guidance not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP128MU502-E/SP β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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DSPIC33EP128MU502-I/SP
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$3.38 / Unit
View Datasheet βDSPIC33EP256MU502-E/SP
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
DSPIC33EP64MU502-E/SP
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DSPIC33EP128GP502-E/SP
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
DSPIC33EP128MC502-E/SP
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
DSPIC33EP128MU502-E/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33E DSC core |
| Maximum CPU Speed | 70 MIPS |
| Flash Program Memory | 128 KB |
| SRAM | 16 KB |
| EEPROM | 1 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +125C (Extended, E suffix) |
| ADC Resolution | 10-bit / 12-bit |
| ADC Sampling Rate | 1.1 Msps (12-bit) |
| On-chip Op-Amps | 3 |
| USB Interface | USB 2.0 Full-Speed device |
| CAN Interface | ECAN, CAN 2.0B |
| Communication Peripherals | 2x UART, 2x SPI, 2x I2C |
| Timers | 1x 16-bit with prescaler + multiple 16/32-bit timers, CTMU |
| PWM | Motor Control PWM / high-resolution PWM |
| Package | 28-pin SPDIP (SP), 300 mil |
| Mounting Type | Through-Hole |
| RoHS Status | ROHS3 Compliant |
| Programming Interface | ICSP (In-Circuit Serial Programming), 2-wire emulation |
DSPIC33EP128MU502-E/SP Pin Configuration
| Pin 1 | MCLR β Master clear reset, programming voltage input |
| Pin 2 | AN0/RB3 β Analog input 0 / port B, VREF+ capable |
| Pin 3 | AN1/RA4 β Analog input 1 / port A, VREF- capable |
| Pin 4 | AN2/RB0 β Analog input 2 / comparator input / port B |
| Pin 5 | AN3/RB1 β Analog input 3 / comparator voltage reference / port B |
| Pin 6 | PGD/AN4/RB2 β ICSP data, analog input 4 / port B |
| Pin 7 | PGC/AN5/RB3 β ICSP clock, analog input 5 / port B |
| Pin 8 | VDD β Positive supply (3.0 V to 3.6 V) |
| Pin 9 | VSS β Ground reference |
| Pin 10 | OSC1/RC12 β Primary oscillator input / external clock in |
| Pin 11 | OSC2/RC15 β Primary oscillator output / clock out |
| Pin 12 | SOSCI/RB4 β Secondary (32.768 kHz) oscillator input / port B |
| Pin 13 | SOSCO/T1CK/RA0 β Secondary oscillator output / Timer1 clock / port A |
| Pin 14 | VDD β Positive supply |
| Pin 15 | VSS β Ground reference |
| Pin 16 | AN8/RB5 β Analog input 8 / port B |
| Pin 17 | AN9/RB6 β Analog input 9 / port B |
| Pin 18 | AN10/RB7 β Analog input 10 / port B |
| Pin 19 | AN11/RB8 β Analog input 11 / port B |
| Pin 20 | AN12/RB9 β Analog input 12 / port B |
| Pin 21 | AN13/RB10 β Analog input 13 / Timer2 external clock / port B |
| Pin 22 | AN14/RB11 β Analog input 14 / Timer3 external clock / port B |
| Pin 23 | AN15/RB12 β Analog input 15 / port B |
| Pin 24 | VSS β Ground reference |
| Pin 25 | VDD β Positive supply |
| Pin 26 | PGD3/RB13 β Alternate ICSP data / remappable I/O / port B |
| Pin 27 | PGC3/RB14 β Alternate ICSP clock / remappable I/O / port B |
| Pin 28 | RB15 β Remappable I/O (UART/SPI/I2C/PPS) / port B |
Typical Applications
DSPIC33EP128MU502-E/SP is suitable for 6 applications: Digital Power Supplies and PFC, BLDC/PMSM Motor Control, USB Embedded Control Nodes, Automotive and Industrial CAN Modules, Portable and Battery-Powered Instruments, Capacitive Touch Human Interface.
Digital Power Supplies and PFC
The DSPIC33EP128MU502-E/SP is a natural fit for digitally controlled AC-DC and DC-DC converters. Its 70 MIPS DSP engine executes compensator math (17x17 multiply, 40-bit accumulation) fast enough for switching frequencies in the hundreds of kilohertz, while the 12-bit 1.1 Msps ADC samples output voltage and inductor current with low latency. High-resolution PWM enables fine duty-cycle granularity for tight regulation. The three on-chip op-amps amplify shunt-current signals ahead of the ADC, cutting external component count. Placed as the sole control IC, it replaces analog compensation networks with firmware-tunable Digital Compensator blocks, simplifying design iteration across the -40C to +125C Extended range.
Recommended
BLDC/PMSM Motor Control
For brushless DC and permanent-magnet synchronous motor drives, the MU502 provides MC-type PWM outputs, quadrature encoder interface (QEI) inputs, and fast ADC triggered synchronously with PWM for low-noise current sampling. The 70 MIPS core runs field-oriented control (FOC) and sensorless observers within one PWM period, and the three integrated op-amps condition low-side shunt currents without external amplifiers. The Extended -40C to +125C rating suits pump, fan, and industrial drive enclosures. The SPDIP through-hole package also simplifies prototyping on perfboard or socketed evaluation fixtures during algorithm bring-up before committing to a production SMT layout.
Recommended
USB Embedded Control Nodes
The integrated USB 2.0 Full-Speed device controller makes the MU502 ideal for instruments, test jigs, and industrial nodes that must communicate with a PC without a separate USB chip. Microchip's USB framework supplies HID, CDC (virtual COM port), and vendor-class stacks executable within the 128 KB Flash alongside application firmware. Because USB and the ECAN controller coexist, the device can serve as a CAN-to-USB gateway for field diagnostics - receiving CAN 2.0B frames on one side and streaming them to a host over CDC on the other. The 16 KB SRAM comfortably buffers multi-frame CAN and USB endpoint traffic simultaneously.
Recommended
Automotive and Industrial CAN Modules
With an ECAN controller supporting CAN 2.0B, 125 kbps to 1 Mbps bit rates, and hardware message buffering, the device targets sensor nodes, gateways, and actuator controllers on vehicle and factory bus networks. The -40C to +125C Extended qualification covers engine-bay-adjacent enclosures and unconditioned industrial cabinets. The CTMU peripheral adds capacitive-touch and precise time-measurement capability for panel interfaces on the same die, and the remappable pin routing (PPS) lets designers place CAN RX/TX, UART, and analog channels on optimal PCB positions. ROHS3 compliance supports standard European-market deployment of these modules.
Recommended
Portable and Battery-Powered Instruments
Operating from a single 3.0 V to 3.6 V rail, the MU502 integrates the analog front end - 12-bit ADC, three op-amps, and CTMU - that portable measurement instruments typically need, minimizing board area and BOM cost. The DSP engine performs FFT and digital filtering on captured waveforms in real time, while USB connectivity transfers results or charging/status telemetry to a host. The 1 KB on-chip EEPROM stores calibration constants without external memory. The through-hole SPDIP package suits hand-built or socketed instrument boards used in lab and service equipment, and Microchip's low-power sleep/idle modes extend battery life between USB-synchronized wake events.
Recommended
Capacitive Touch Human Interface
The CTMU (Charge Time Measurement Unit) enables mTouch capacitive-touch buttons and sliders directly on the same controller driving application logic, eliminating a separate touch IC. Combined with the 12-bit ADC for ambient sensing, PWM outputs for LED feedback or haptic drivers, and USB for host connectivity, a single DSPIC33EP128MU502-E/SP can implement a complete human-machine interface: touch sensing, LED indication, and host reporting. The -40C to +125C range allows panel controllers in outdoor or industrial equipment, while the 28-pin SPDIP package simplifies revisions of touch electrode routing during mechanical prototyping phases.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128MU502-E/SP β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128MU502-I/SP | DSPIC33EP256MU502-E/SP | DSPIC33EP128GP502-E/SP | DSPIC33EP128MC502-E/SP |
|---|---|---|---|---|---|
| Package | 28-pin SPDIP (SP), 300 mil | 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 |
| Flash Memory | 128 KB | 128 KB | 256 KB | 128 KB | 128 KB |
| SRAM | 16 KB | 16 KB | 24 KB | 16 KB | 16 KB |
| USB Device | Yes (USB 2.0 Full-Speed) | Yes | Yes | No | No |
| CAN (ECAN) | Yes (CAN 2.0B) | Yes | Yes | Yes | Yes |
| On-chip Op-Amps | 3 | 3 | 3 | 0 | 0 |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +125C (Extended) |
Key Differentiators
- USB 2.0 Full-Speed device integrated on die (vs DSPIC33EP128GP502-E/SP)
- Extended -40C to +125C qualification (vs DSPIC33EP128MU502-I/SP)
- Three on-chip op-amps for current sensing (vs DSPIC33EP128MC502-E/SP)
Design Notes
The dsPIC33EP128MU502 requires a regulated 3.0 V to 3.6 V supply; do not connect it directly to 5 V. Use a 3.3 V LDO such as the MCP1700 or MCP1755, and decouple each VDD pin (8, 14, 25) with 100 nF ceramic capacitors placed within 5 mm of the pin, plus a 4.7 uF to 10 uF bulk capacitor near the board entry. VSS pins (9, 15, 24) should return to a low-impedance ground plane. During Flash self-programming, current transients occur - adequate bulk decoupling prevents brown-out resets.
In the SPDIP package, analog pins (2-5, 16-23) sit adjacent to digital remappable I/O. For best ADC accuracy, route analog traces away from PWM and USB lines, and configure unused ANx pins as digital outputs low (per Microchip ADC usage guidelines). The secondary oscillator pins (12, 13) should use a 32.768 kHz crystal with ground guard ring if RTCC accuracy matters. MCLR (pin 1) needs a 10 kOhm pull-up to VDD and should be brought to an ICSP header together with PGC/PGD (pins 6, 7).
Two frequent mistakes: (1) assuming the -I version substitutes for the -E version - the -I grade stops at +85C, which fails Extended-temperature requirements; verify the -E suffix on incoming parts. (2) Configuring Peripheral Pin Select (PPS) incorrectly - UART, SPI, I2C, and PWM outputs must be explicitly mapped via PPS registers at startup; forgetting the unlock sequence leaves peripherals dead. Also note that with all peripherals active (USB + ECAN + ADC at full rate), verify clock configuration delivers the intended 70 MIPS (7.3728 MHz x PLL or 8 MHz crystal options per datasheet).
Compliance Information
ROHS3 Compliant per distributor listing (ics-embedded.com). Lead-free per /E suffix qualification. Reach and conflict-minerals status not stated in provided data.
