DSPIC33EP128MC202T-I/MM - 16-bit DSC, 128KB Flash | Microchip
MPN: DSPIC33EP128MC202T-I/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.16 | $41.60 |
| 100 | $3.74 | $374.00 |
| 500 | $3.37 | $1,685.00 |
| 1,000 | $3.03 | $3,030.00 |
DSPIC33EP128MC202T-I/MM Overview
A digital signal controller combines the compute power of a DSP with the peripheral set and ease of use of a microcontroller. In the power-management hierarchy, the dsPIC33EP family sits above general-purpose MCUs and below standalone DSPs, integrating motor-control peripherals, analog blocks, and communications in a single chip. This makes DSCs the standard choice for digital power conversion, precision motor control, and embedded sensing.
Key features include a 16-bit modified Harvard architecture core, dual on-chip op amps (MCPWM per distributor data: motor control PWM), output-compare modules, comparators, and peripherals such as DMA, I2C, SPI, UART/IrDA/LIN, and QEI quadrature encoder interfaces per Microchip product information. JTAG/IEEE 1149.2 boundary scan and in-circuit programming (ICSP) support development and production programming. Industrial temperature rating covers -40C to +85C.
Technically, the dsPIC33EP core features DSP multiply-accumulate instructions, fixed-point arithmetic support, and flexible interrupt vectoring, enabling fast control-loop execution for field-oriented motor control at kHz rates. Flash self-programming supports field firmware updates, and the watch-dog timer plus low-voltage detect protect against brownout conditions.
Typical applications include brushless DC and PMSM motor control, digital power supplies (LLC, PFC), solar micro-inverters, and industrial sensors that combine analog signal conditioning with communications.
A key design consideration: the 28-pin QFN exposed pad must be soldered to a ground plane for thermal dissipation and EMC; budget I/O carefully since motor-control designs typically need PWM pairs, encoder inputs, and at least one UART simultaneously.
This page synthesizes distributor pricing from DigiKey, Mouser, and LCSC, drop-in same-package alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33EP128MC202T-I/MM — 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 DSPIC33EP128MC202T-I/MM (same form factor and footprint) — differing in Core, Operating Temperature, Package, Analog Peripherals, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128MC202T-E/MM
✅ Drop-In✓ In Stock
$3.41 / Unit
View Datasheet →DSPIC33EP128MC202-I/MM
✅ Drop-In✓ In Stock
$4.9 / Unit
View Datasheet →DSPIC33EP256MC202T-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64MC202T-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32MC202T-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC502T-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC202T-I/MM Maximum Ratings & Electrical Characteristics
| Core | dsPIC33EP 16-bit DSC core |
| Core Speed | 70 MIPS (device family); up to 60 MHz internal clock per distributor listing |
| Program Memory | 128 KB Flash (43K x 24) |
| RAM | 16 KB |
| Operating Voltage | 3.3 V |
| Package | 28-QFN-S (6x6 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| Communications Interfaces | I2C, SPI, UART/USART, IrDA, LINbus, QEI |
| Motor Control PWM | Yes (MCPWM) |
| Analog Peripherals | OpAmps, Comparators, 10/12-bit ADC |
| DMA | Yes |
| Watchdog Timer | Yes (WDT) |
| Debug / Boundary Scan | IEEE 1149.2 compatible (JTAG) boundary scan, ICSP programming |
| Packing | Tape & Reel (T suffix) |
| RoHS Status | Compliant |
| Reference Datasheet Publication | Published 2013-08-15 per datasheets.com |
DSPIC33EP128MC202T-I/MM Pin Configuration
| Pin 1 | MCLR — Master clear reset / programming voltage input |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive voltage reference / change notification / port B |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative voltage reference / change notification / port B |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select 1 / port B |
| Pin 5 | AN3/CTED2/CN5/RB3 — Analog input 3 / comparator event / port B |
| Pin 6 | PGD/AN4/CN6/RB4 — Programming data / analog input 4 / port B |
| Pin 7 | PGC/AN5/CN7/RB5 — Programming clock / analog input 5 / port B |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OA1OUT/AN6/OC1/CN8/RB6 — Op-amp 1 output / analog input 6 / output compare 1 / port B |
| Pin 10 | OA2OUT/AN7/OC2/CN9/RB7 — Op-amp 2 output / analog input 7 / output compare 2 / port B |
| Pin 11 | AN8/RTCC/CN10/RB8 — Analog input 8 / RTCC / port B |
| Pin 12 | AN9/CTED1/T2CK/CN11/RB9 — Analog input 9 / timer 2 external clock / port B |
| Pin 13 | T1CK/AN10/CN12/RB10 — Timer 1 external clock / analog input 10 / port B |
| Pin 14 | SOSCI/AN11/CN13/RB11 — Secondary oscillator input / analog input 11 / port B |
| Pin 15 | SOSCO/AN12/CN14/RB12 — Secondary oscillator output / analog input 12 / port B |
| Pin 16 | VCAP/VDDCORE — Core voltage regulator capacitor connection |
| Pin 17 | VSS — Ground reference |
| Pin 18 | VDD — Positive supply (3.3V) |
| Pin 19 | PWM1L/RD0 — Motor control PWM 1 low-side output / port D |
| Pin 20 | PWM1H/RD1 — Motor control PWM 1 high-side output / port D |
| Pin 21 | PWM2L/RD2 — Motor control PWM 2 low-side output / port D |
| Pin 22 | PWM2H/RD3 — Motor control PWM 2 high-side output / port D |
| Pin 23 | RC0 — General purpose I/O port C |
| Pin 24 | RC1 — General purpose I/O port C |
| Pin 25 | C1IN-/RC2 — Comparator 1 inverting input / port C |
| Pin 26 | C2IN-/RC3 — Comparator 2 inverting input / port C |
| Pin 27 | RC4 — General purpose I/O port C |
| Pin 28 | RC5 — General purpose I/O port C |
Typical Applications
DSPIC33EP128MC202T-I/MM is suitable for 6 applications: Brushless DC / PMSM Motor Control, Digital Power Supplies (PFC / LLC), Solar Micro-Inverters and MPPT, Industrial Sensor Nodes, Lighting Ballasts and LED Drivers, Automotive Body and Auxiliary Control (with E-grade).
Brushless DC / PMSM Motor Control
The DSPIC33EP128MC202T-I/MM is purpose-built for precision motor control: its motor-control PWM (MCPWM) module generates complementary outputs with programmable dead-time, the QEI peripheral reads encoder position, and on-chip op amps amplify shunt current signals before the ADC samples them. Per Microchip, the dsPIC33E family enables high-performance, precision motor control designs. Running at 70 MIPS, the core executes field-oriented control (FOC) loops at kHz rates with DSP multiply-accumulate instructions. Placed directly in the power-control path with PWM driving a three-phase inverter gate-driver stage, the DSC closes current, speed, and position loops in hardware-timed interrupts. The 128KB Flash holds the control algorithm plus commutation tables; using the internal op amps and comparators saves external signal-conditioning ICs, reducing BOM cost and PCB area in the 6x6 mm QFN footprint.
Recommended
Digital Power Supplies (PFC / LLC)
Digital power conversion benefits directly from the MCPWM module's high-resolution PWM and fast ADC triggered at zero-crossing instants. The DSPIC33EP128MC202T-I/MM implements voltage-mode or current-mode control for PFC front-ends and LLC resonant converters, with feedback compensation executed in software at 70 MIPS - fast enough for kHz-scale switching with dual-sample loops. On-chip comparators provide cycle-by-cycle overcurrent protection independent of software latency, and the DMA streams ADC results without CPU intervention. Using this DSC in place of dedicated analog controllers lets one firmware base serve multiple power ratings and adds digital telemetry (fault logs, efficiency data) over UART or I2C. The 28-QFN 6x6 mm package fits the compact controller area of server and telecom power boards where board space is constrained and temperature ranges -40C to +85C cover indoor equipment environments.
Recommended
Solar Micro-Inverters and MPPT
Maximum power point tracking (MPPT) requires fast, deterministic sampling of panel voltage/current plus efficient power-stage control. The DSPIC33EP128MC202T-I/MM handles both: its 70 MIPS core runs the MPPT algorithm while the MCPWM drives the DC-DC conversion stage, and DMA-based ADC sampling synchronizes measurements to the PWM cycle for accurate power calculation. According to Microchip's positioning of the dsPIC33E family for digital power and energy conversion, the integrated comparators implement hardware fault protection for panel overcurrent conditions. The 128KB Flash accommodates grid-interconnect communication firmware (e.g., powerline or UART-based telemetry) alongside the MPPT engine. In an outdoor-rated inverter enclosure, the industrial -40C to +85C rating and QFN exposed-pad thermal design support thermally demanding, passively cooled environments typical of rooftop installations.
Recommended
Industrial Sensor Nodes
Industrial sensing nodes need analog conditioning, signal processing, and a communications stack in one device - exactly the dsPIC33EP128MC202T-I/MM profile. On-chip op amps condition millivolt-level signals from pressure, strain-gauge, or thermocouple front-ends into the ADC's input range, DSP instructions implement filtering (FIR/IIR) and RMS computation, and UART/IrDA, LIN, I2C, or SPI links deliver results to a SCADA gateway or PLC. Per Microchip product documentation, the family integrates enhanced on-chip peripherals for these combined analog-plus-DSP workloads. The 128KB Flash stores compensation tables and protocol stacks; 16KB RAM buffers sample windows for FFT-based vibration analysis. With industrial -40C to +85C operation and a watchdog timer for autonomous recovery, the DSC suits long-deployment nodes on factory floors where firmware updates happen over the existing communication link via self-programming Flash.
Recommended
Lighting Ballasts and LED Drivers
Digital HID ballast and high-power LED driver control demands precise phase control and dimming resolution. The DSPIC33EP128MC202T-I/MM's MCPWM module generates half-bridge or full-bridge drive with adjustable dead-time and phase shift, enabling resonant lamp ignition sequences and PWM/analog dimming profiles executed in firmware. Per distributor peripheral listings (MCPWM, op amps, comparators), the analog blocks monitor lamp current and protect against open/short conditions via hardware comparators. At 70 MIPS the core runs resonance-tracking and power-factor correction simultaneously. The 128KB Flash supports multi-protocol dimming interfaces (DALI over UART, 0-10V over ADC channels, TRIAC phase-dimming) in one firmware image. The 28-QFN 6x6 mm footprint keeps the controller section compact inside ballast housings, and the industrial temperature rating covers enclosed luminaire environments where ambient temperatures routinely exceed 70C.
Recommended
Automotive Body and Auxiliary Control (with E-grade)
While the -I grade targets industrial environments, the same die is available as DSPIC33EP128MC202T-E/MM for -40C to +125C applications. Designers of automotive auxiliary systems (pumps, actuators, blowers) use the identical pinout and MCPWM/QEI/op-amp peripheral set for single-chip motor control inside body electronics. According to Microchip USA product data, the -E variant is an automotive-grade microcontroller offering 128KB Flash, motor control PWM, DMA, WDT, and I2C/IrDA/LIN/QEI/SPI/UART connectivity. LINbus support is particularly relevant for in-vehicle network nodes. Using the same 28-QFN footprint across industrial and automotive builds lets one PCB layout serve both markets with only a component-grade change. The exposed-pad QFN construction supports the vibration-tolerant, thermally efficient solder joints required in under-dash and engine-bay-adjacent enclosures.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128MC202T-I/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128MC202T-E/MM | DSPIC33EP128MC202-I/MM | DSPIC33EP256MC202T-I/MM | DSPIC33EP64MC202T-I/MM | DSPIC33EP32MC202T-I/MM |
|---|---|---|---|---|---|---|
| Package | 28-QFN-S (6x6 mm) exposed pad | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 128 KB (43K x 24) | 128 KB | 128 KB | 256 KB | 64 KB | 32 KB |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Core Speed | 70 MIPS | 70 MIPS (60 MIPS per variant listing) | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Packing | Tape & Reel (T) | Tape & Reel | Tube / Tray | Tape & Reel | Tape & Reel | Tape & Reel |
| Typical Relative Cost | Mid (128KB tier) | Higher (E-grade premium) | Comparable | Higher (+Flash) | Lower | Lowest |
Key Differentiators
- Extended temperature option on identical silicon (vs DSPIC33EP128MC202T-E/MM)
- Largest Flash in family tier (vs DSPIC33EP64MC202T-I/MM)
- 16KB RAM for DSP buffers (vs DSPIC33EP64MC202T-I/MM)
- Trade-off: smaller Flash needed means lower cost (vs DSPIC33EP32MC202T-I/MM)
Design Notes
The 28-QFN-S exposed pad is the primary thermal and ground path. Extend the exposed pad land pattern with a via array (3x3 minimum) into the internal ground plane to reduce theta_JA and improve EMC performance. Estimated: with ~0.5W dissipation at 70 MIPS and a typical QFN-28 theta_JA near 40-50 C/W with proper copper, junction rise is roughly 20-25C above ambient - fine for +85C industrial ratings, but verify against the datasheet thermal table. Place 0.1uF decoupling caps on every VDD pin within 2 mm of the pin.
Connect the VCAP/VDDCORE pin (pin 16) to a low-ESR ceramic capacitor (approximately 10uF per Microchip family datasheet conventions) to ground - this stabilizes the internal core regulator and is essential for reliable operation; do not supply this pin externally. Ensure the 3.3V rail ramp is monotonic; add a 10uF bulk capacitor at the VDD entry. MCLR must have a pull-up (4.7k-10k) for in-circuit programming access even in production boards, so programmers can be connected without rework.
When driving a three-phase inverter, keep PWM outputs (PWM1L/H, PWM2L/H) short and route them away from the analog inputs (AN0-AN12) to prevent coupling into ADC samples. Synchronize ADC sampling to the PWM period via the MCPWM trigger rather than free-running the ADC, so shunt currents are sampled at stable mid-PWM points. For long leads to gate drivers, add series resistors (22-33 ohm) at the DSC pins to damp ringing before it reaches the microcontroller.
Configuring peripheral pin select (PPS) incorrectly is the most common dsPIC33EP bring-up failure - verify each RP pin mapping against the family datasheet before committing the layout, since UART/SPI/QEI functions are assignable. Also confirm the oscillator configuration fuses: selecting an unsupported crystal or PLL divider can leave the device dead at power-up with no JTAG access. Always enable the watchdog (WDT) in production firmware; per Microchip documentation it is a required safety net for motor-control applications.
Compliance Information
RoHS compliant per Microchip standard product and distributor listings (DigiKey, Mouser, LCSC). The -E variant is described as automotive-grade by Microchip USA; the -I grade on this page is a standard industrial product. AEC-Q100 status for this exact MPN not stated in provided data.
