DSPIC33EP128MC502T-E/SO - 16-bit 60MIPS DSC, 128KB Flash | Microchip
MPN: DSPIC33EP128MC502T-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.9 | $5.90 |
| 10 | $5.31 | $53.10 |
| 100 | $4.72 | $472.00 |
| 500 | $4.25 | $2,125.00 |
| 1,000 | $3.8 | $3,800.00 |
DSPIC33EP128MC502T-E/SO Overview
A digital signal controller combines the control peripherals of a microcontroller with the multiply-accumulate DSP engine of a digital signal processor in a single chip. Within the power-management hierarchy, the dsPIC33E family sits between general-purpose MCUs and dedicated DSPs, making it a popular choice for embedded motor control, power conversion, and digital power applications where both fast control loops and rich communication interfaces are required.
Key features include a 16-bit modified Harvard architecture core running at up to 60 MIPS (70 MIPS capable family members), a single-cycle 16x16 MAC DSP engine with dual 40-bit accumulators, 3.3V operation, and extensive connectivity: CAN 2.0B, I2C, SPI, UART/USART, IrDA, LINbus, quadrature encoder interface (QEI), and multiple PWM channels. The extended-temperature E suffix supports demanding automotive and industrial environments.
Technically, the device integrates a 12-bit ADC, motor-control PWM with dead-time insertion, input capture/output compare modules, and self-programming Flash for field updates. In-circuit serial programming (ICSP), JTAG boundary scan, and debug via two program breakpoints simplify development under Microchip MPLAB X tooling.
Typical applications include brushless DC and permanent-magnet motor control, switch-mode power supplies, digital lighting, and automotive auxiliary systems where CAN connectivity and precise PWM timing are essential.
Design consideration: keep the 3.3V supply decoupled with 0.1 uF ceramics at both VDD pins and route high-current PWM traces away from the analog inputs to preserve ADC accuracy.
This page adds value beyond the manufacturer datasheet by consolidating distributor pricing context, drop-in alternatives, application pairings, and practical design notes in one place.
Drop-in alternatives for DSPIC33EP128MC502T-E/SO — 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 DSPIC33EP128MC502T-E/SO (same form factor and footprint) — differing in Operating Temperature, Series, Core Architecture, Package, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128MC502T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP128MC502-I/SO
✅ Drop-In✓ In Stock
$3.29 / Unit
View Datasheet →DSPIC33EP128GP502-H/SO
✅ Drop-In✓ In Stock
$3.36 / Unit
View Datasheet →DSPIC33EP128MC502T-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC DSC |
| Core Speed | 60 MIPS |
| Max Clock Frequency | 70 MHz |
| Program Memory Size | 128 KB (43K x 24) Flash |
| RAM Size | 8 KB |
| Supply Voltage | 3.3 V |
| Package | 28-SOIC (0.295 in, 7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C (E, extended) |
| Qualification | Automotive, AEC-Q100 |
| Connectivity | CANbus, I2C, SPI, UART/USART, IrDA, LINbus, QEI |
| Programmability | In-Circuit Serial Programming (ICSP), JTAG (IEEE 1149.2 compatible) |
| Series | dsPIC 33EP, Motor Control family |
| RoHS Status | Compliant |
| Packaging | Tape & Reel (T suffix) |
DSPIC33EP128MC502T-E/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low), programming voltage input |
| Pin 2 | AN0/VREF+/CN3/RB0 — Analog input 0 / positive voltage reference / change notification |
| Pin 3 | AN1/VREF-/CN2/RB1 — Analog input 1 / negative voltage reference / change notification |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select / change notification |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / QEI index input / change notification |
| Pin 6 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / QEI phase A / input capture 7 |
| Pin 7 | AN5/QEB/IC8/CN7/RB5 — Analog input 5 / QEI phase B / input capture 8 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN12/RA2 — Oscillator input / external clock input |
| Pin 10 | OSC2/CLKO/CN13/PMA0/RA3 — Oscillator output / clock output |
| Pin 11 | VDD — Positive supply (3.3 V) |
| Pin 12 | RP15/SDO1/EMUD1/RF3 — Remappable pin / SPI data output |
| Pin 13 | RP14/SOSCI/CN1/EMUC3/RF4 — Remappable pin / secondary oscillator input |
| Pin 14 | RP13/SOSCO/T1CK/CN0/EMUD3/RF5 — Remappable pin / secondary oscillator output / Timer1 clock |
| Pin 15 | VDD — Positive supply (3.3 V) |
| Pin 16 | RP12/RF6 — Remappable peripheral pin |
| Pin 17 | RP11/RF7 — Remappable peripheral pin |
| Pin 18 | VSS — Ground reference |
| Pin 19 | RP10/PWM1H/RE0 — Remappable pin / PWM1 half-bridge output |
| Pin 20 | RP17/PWM1L/RE1 — Remappable pin / PWM1 complementary output |
| Pin 21 | RP18/PWM2H/RE2 — Remappable pin / PWM2 output |
| Pin 22 | RP19/PWM2L/RE3 — Remappable pin / PWM2 complementary output |
| Pin 23 | RP28/PWM3H/RE4 — Remappable pin / PWM3 output |
| Pin 24 | RP29/PWM3L/RE5 — Remappable pin / PWM3 complementary output |
| Pin 25 | PGC/EMUC/RB6 — Programming clock / in-circuit debug clock |
| Pin 26 | PGD/EMUD/RB7 — Programming data / in-circuit debug data |
| Pin 27 | VDD — Positive supply (3.3 V) |
| Pin 28 | VSS — Ground reference |
Typical Applications
DSPIC33EP128MC502T-E/SO is suitable for 6 applications: BLDC / PMSM Motor Control, Automotive Auxiliary Modules, Digital Power Conversion, Industrial Automation Nodes, Embedded Sensing and Instrumentation, IoT and Connected Edge Devices.
BLDC / PMSM Motor Control
The DSPIC33EP128MC502T-E/SO is purpose-built for brushless DC and permanent-magnet synchronous motor control. Its 60 MIPS DSP core executes field-oriented control (FOC) loops fast enough for high-dynamic servo and traction applications, while the hardware quadrature encoder interface decodes position feedback without CPU overhead. Complementary PWM outputs with programmable dead-time directly drive three-phase gate drivers, and the 3.3 V logic interfaces cleanly with isolated driver ICs. Microchip's dsPIC33E documentation specifically cites quieter, more energy-efficient motor operation and extended drive life. Trade-off: FOC math consumes significant Flash headroom from the 128 KB budget, leaving room for host communication stacks.
Recommended
Automotive Auxiliary Modules
With AEC-Q100 qualification and a -40C to +125C extended range, this DSC fits automotive auxiliary electronic modules such as pump controllers, actuator nodes, and body electronics exposed to harsh thermal environments. The integrated CAN 2.0B module connects directly to in-vehicle networks through an external transceiver, while LINbus and UART support cover lower-cost sub-nodes. The self-programming Flash enables in-application firmware updates for field-serviceable ECUs. Performance consideration: at 3.3 V supply the I/O is not 5 V tolerant in all configurations, so level translation may be required when interfacing legacy 5 V automotive sensors.
Recommended
Digital Power Conversion
In switch-mode power supplies, PFC stages, and digital lighting ballasts, the 60 MIPS DSP engine with single-cycle MAC performs the fast control-loop math that analog compensation would otherwise require. High-resolution PWM outputs drive half-bridge and full-bridge topologies with precise duty and phase control, and the 12-bit ADC samples current and voltage feedback synchronously with the PWM carrier. Typical deployments include telecom rectifiers and LED drivers where efficiency and transient response are competitive differentiators. Trade-off: digital control adds firmware development effort versus a purely analog controller, but enables adaptive tuning across operating conditions.
Recommended
Industrial Automation Nodes
The combination of CAN, I2C, SPI, and multiple UARTs makes this DSC an effective industrial automation node: sensor aggregation, valve and actuator control, and factory-floor communication gateways. The quadrature encoder interface reads shaft encoders from conveyor and positioning axes directly, and the DSP core supports filtering and diagnostics that plain MCUs perform too slowly. Its extended temperature range suits panels near motors and drives where ambient temperatures climb. Performance consideration: 8 KB of RAM is adequate for protocol stacks but not for large buffering; design the data flow to stream rather than accumulate samples.
Recommended
Embedded Sensing and Instrumentation
For handheld and bench instruments, the DSP core accelerates FFT, digital filtering, and calibration math on captured sensor data, while UART and USB-bridge-class connectivity offload results to a host. The on-chip ADC with multiple channels handles multichannel sensor inputs, and ICSP/JTAG simplify in-fixture programming during production. The 28-SOIC package with 7.50 mm body width fits two-layer cost-sensitive boards. Consideration: for precision metrology-grade measurement, add an external precision reference and low-noise front end, since the internal ADC is intended for control-loop accuracy rather than laboratory measurement specifications.
Recommended
IoT and Connected Edge Devices
Edge devices that bridge local sensors to a CAN, LIN, or serial backhaul use this DSC as the local controller: it runs filtering and protocol tasks on the DSP core while a separate radio or Ethernet module handles uplink. SPI and UART interfaces connect external connectivity modules, and the extended temperature variant supports outdoor enclosures and sealed industrial sensors. Self-programming Flash allows over-the-serial firmware updates in deployed hardware. Performance consideration: there is no integrated radio, so total BOM and power budget must account for the external connectivity module and its supply sequencing.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128MC502T-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128MC502T-I/SO | DSPIC33EP128MC502-I/SO | DSPIC33EP128GP502-H/SO | DSPIC33EP128MC202T-E/MM | DSPIC33CK64MC102T-I/SS |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | QFN-28 - different | SSOP-28 - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 60 MIPS | 60 MIPS | 60 MIPS | 60 MIPS | 60 MIPS | 100 MIPS |
| Flash Memory | 128 KB (43K x 24) | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB |
| Family / Peripheral Focus | Motor Control (MC) with QEI + motor PWM | Motor Control - same | Motor Control - same | General Purpose (GP) | Motor Control - same | Motor Control (dsPIC33CK) |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
Key Differentiators
- Extended -40C to +125C range with AEC-Q100 (vs DSPIC33EP128MC502T-I/SO)
- Motor Control peripheral set (QEI + complementary PWM) (vs DSPIC33EP128GP502-H/SO)
- 128 KB Flash and 60 MIPS in 28 pins (vs DSPIC33CK64MC102T-I/SS)
Design Notes
Decouple both VDD pins (11, 15) and the third VDD (pin 27) each with a 0.1 uF ceramic placed within 3 mm of the pin, plus one 4.7-10 uF bulk capacitor near the device. The 28-SOIC 7.50 mm body leaves room for short traces on a two-layer board; keep the decoupling loop area minimal to suppress switching noise coupling into the 12-bit ADC. Tie all VSS pins (8, 18, 28) to a continuous ground plane rather than a single trace.
On the MC502, PWM outputs (pins 19-24) switch motor currents via external gate drivers. Route these traces away from analog inputs RB0-RB5 (pins 2-7) and the VREF pins to prevent kickback noise corrupting ADC samples. Synchronize ADC sampling to the PWM period in firmware (SOC trigger from the PWM module) rather than free-running, so current sampling occurs in the low-noise window of each switching cycle - this is the standard pattern in Microchip motor-control reference designs.
Do not leave MCLR (pin 1) floating: use a 10k pull-up to VDD and keep the ICSP connector wired to pins 1, 25, 26 for in-circuit programming. Pin-peripheral mapping on the dsPIC33EP is done through the PPS (peripheral pin select) registers - forgetting to map UART/CAN pins in initialization code is the most common first-boot failure. Also confirm oscillator configuration fuses match your crystal; a mismatch between config settings and hardware results in silent lockup rather than a reset.
Estimated: the 28-SOIC package dissipates well under 0.5 W in typical 3.3 V operation (core active current is on the order of tens of mA), so no heatsink or copper pour is normally required. However, in the +125C extended environment, verify junction temperature using the datasheet theta_JA with your specific board stack-up, since high ambient plus driver-stage heating on shared copper can approach the maximum rating.
Compliance Information
Automotive, AEC-Q100 qualification listed by DigiKey and datasheets.globalspec. Extended temperature range -40C to +125C per the E suffix.
