DSPIC33EP128MC202-I/SP - 70 MIPS 16-bit DSC | Microchip
MPN: DSPIC33EP128MC202-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.62 | $5.62 |
| 10 | $5.15 | $51.50 |
| 100 | $4.58 | $458.00 |
| 500 | $4.21 | $2,105.00 |
| 1,000 | $3.94 | $3,940.00 |
DSPIC33EP128MC202-I/SP Overview
A digital signal controller combines the compute throughput of a microcontroller with DSP-grade math acceleration in a single chip. Within the power-management hierarchy, the DSC sits above a standard MCU: it adds a hardware DSP engine (single-cycle MAC, dual operand fetch, modulo and bit-reversed addressing) on top of a 16-bit MCU architecture, making it a member of the broader 16-bit microcontroller and digital signal controller category.
Key differentiating features include high-speed PWM peripherals purpose-built for motor control (complementary or independent outputs, dead-time insertion, fault inputs), an operating speed of up to 70 MIPS from an internal PLL, and integrated advanced analog peripherals that reduce external component count. The -I suffix denotes the industrial -40C to +85C operating range, and the /SP suffix denotes the 28-pin 300-mil wide-body SPDIP package suited to through-hole assembly.
Architecturally, the dsPIC33E CPU executes most instructions in a single cycle at 70 MIPS, with two 40-bit accumulators, 16 x 16 multiply operations, and hardware divide support. Flash program memory is organized in 24-bit instruction words, and in-circuit serial programming (ICSP) plus JTAG boundary scan support production programming and debugging via tools such as PICkit, ICD, and REAL ICE.
Typical applications include Brushed DC, Brushless DC (BLDC), permanent-magnet synchronous (PMSM), and stepper motor control, digital power supplies (power factor correction, DC-DC converters), and embedded control systems requiring DSP filtering, such as sensor signal processing. The through-hole DIP package makes the part especially popular in prototyping, education, and repairable industrial equipment.
Design consideration: the dsPIC33E core requires an external low-ESR capacitor on the internal regulator output (VCAP/VDDCORE pin); this capacitor is mandatory for stable operation and must not be omitted. All VDD/VSS pairs must be connected even on simplified designs, and PGECx/PGEDx pins must be used as matched pairs during programming.
This page synthesizes verified distributor data, drop-in family alternatives, pricing tiers, and practical design notes beyond what a single datasheet page provides.
Drop-in alternatives for DSPIC33EP128MC202-I/SP — 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 DSPIC33EP128MC202-I/SP (same form factor and footprint) — differing in Package, Operating Temperature, Mounting Type, Product Family, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256MC202-I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.12 / Unit
View Datasheet →DSPIC33EP64MC202-I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.1 / Unit
View Datasheet →DSPIC33EP32MC202-I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.57 / Unit
View Datasheet →DSPIC33EP128MC202-H/SP
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP128MC202-I/SP Maximum Ratings & Electrical Characteristics
| Core | dsPIC33E 16-bit DSC core |
| Maximum CPU Speed | 70 MIPS |
| Clock Frequency | 60 MHz (per Mouser listing) |
| Program Memory Size | 128 KB (43K x 24) Flash |
| RAM Size | 16 KB |
| Package | 28-SPDIP (through-hole) |
| Operating Temperature | -40C to +85C (industrial, -I suffix) |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Supply Voltage Nominal | 3.3 V |
| Instruction Width | 24-bit |
| DSP Engine | Single-cycle MAC, 16x16 multiply, dual 40-bit accumulators |
| Programming Interface | ICSP (2-wire PGECx/PGEDx pairs), JTAG |
| Mounting Type | Through Hole |
| Product Family | dsPIC33EP128MC202 (Motor Control family) |
| Key Peripherals | High-speed PWM, advanced analog, enhanced peripherals |
| MSL Level | Not applicable (through-hole DIP) |
DSPIC33EP128MC202-I/SP Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low), programming voltage input |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive voltage reference |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative voltage reference |
| Pin 4 | PGD/AN2/SS1/CN4/RB2 — ICSP data, analog input 2, SPI slave select |
| Pin 5 | PGC/AN3/CN5/RB3 — ICSP clock, analog input 3 |
| Pin 6 | AN4/C1IN-/CN6/RB4 — Analog input 4 / comparator 1 inverting input |
| Pin 7 | AN5/C1IN+/CN7/RB5 — Analog input 5 / comparator 1 non-inverting input |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN12/RA2 — Oscillator input / external clock input |
| Pin 10 | OSC2/CLKO/CN13/RA3 — Oscillator output / clock output |
| Pin 11 | VDD — Positive supply, 3.0 V to 3.6 V |
| Pin 12 | AN6/RP1/RB6 — Analog input 6 / remappable peripheral pin |
| Pin 13 | AN7/RP0/RB7 — Analog input 7 / remappable peripheral pin |
| Pin 14 | VDD — Positive supply (all VDD pins must be connected) |
| Pin 15 | PGD2/AN9/RP3/RB8 — Alternate ICSP data pair 2, analog input 9 |
| Pin 16 | PGC2/AN10/RP17/RB9 — Alternate ICSP clock pair 2, analog input 10 |
| Pin 17 | AN11/RB10 — Analog input 11 / general purpose I/O |
| Pin 18 | AN12/RB11 — Analog input 12 / general purpose I/O |
| Pin 19 | AN13/RB12 — Analog input 13 / general purpose I/O |
| Pin 20 | AN14/C2IN-/RB13 — Analog input 14 / comparator 2 inverting input |
| Pin 21 | AN15/C2IN+/RB14 — Analog input 15 / comparator 2 non-inverting input |
| Pin 22 | AVDD — Analog positive supply |
| Pin 23 | AVSS — Analog ground |
| Pin 24 | RE0/RP18 — General purpose I/O / remappable pin (PWM output group) |
| Pin 25 | RE1/RP19 — General purpose I/O / remappable pin (PWM output group) |
| Pin 26 | RE2/RP20 — General purpose I/O / remappable pin (PWM output group) |
| Pin 27 | RE3/RP21 — General purpose I/O / remappable pin (PWM output group) |
| Pin 28 | VCAP/VDDCORE — Internal regulator output - external low-ESR capacitor required |
Typical Applications
DSPIC33EP128MC202-I/SP is suitable for 6 applications: BLDC / PMSM Motor Control, Digital Power Supplies, Stepper Motor Drivers, Sensor Signal Processing, Education and Prototyping, Industrial Automation and Repairable Equipment.
BLDC / PMSM Motor Control
The dsPIC33EP128MC202-I/SP is purpose-built for precision motor control: its 70 MIPS DSP core executes field-oriented control (FOC) loops at tens of kHz, while the dedicated high-speed PWM module supplies complementary outputs with hardware dead-time insertion and fault shutdown. In a typical sensorless BLDC drive, the DSC reads back-EMF through its analog inputs, runs the control algorithm using single-cycle 16x16 MAC instructions, and drives a three-phase inverter through the RE0-RE3 PWM pins. The on-chip PWM resolution supports fine duty-cycle control for low-torque-ripple operation, and the 128 KB Flash holds the full FOC stack plus startup routines. Unlike a generic MCU, no external DSP or supervisor chip is needed, reducing BOM cost and board area in compact drives.
Recommended
Digital Power Supplies
In digital power applications such as power factor correction, LLC converters, and synchronous buck regulators, the dsPIC33EP128MC202-I/SP replaces analog control loops with firmware-controlled high-speed PWM. The 70 MIPS core closes voltage and current loops at switching frequencies common in AC-DC and DC-DC stages, with the high-resolution PWM providing the duty-cycle granularity needed for tight regulation. The DSP engine executes compensator (PID/2P2Z) calculations in single cycles, and the integrated analog inputs handle voltage/current feedback scaling. The 128 KB Flash supports multiple firmware profiles and compensation tables. Through-hole SPDIP packaging also simplifies prototype iteration in lab power-supply development before committing to a surface-mount production build.
Recommended
Stepper Motor Drivers
Stepper applications benefit from the dsPIC33EP128MC202-I/SP's combination of precise PWM generation and DSP throughput. Microstepping requires generating sine-weighted phase currents at high update rates; the 70 MIPS core computes the phase tables in real time while the high-speed PWM outputs, with dead-time control, drive H-bridge stages through the RE0-RE3 pins. The DSC's analog inputs read winding current sense signals for closed-loop microstepping, improving torque accuracy and reducing heat compared with open-loop drives. The 128 KB Flash holds acceleration/deceleration profiles and communication firmware simultaneously, and the industrial -40C to +85C rating suits CNC, 3D-printer, and automation environments where ambient temperatures fluctuate.
Recommended
Sensor Signal Processing
The DSP engine in the dsPIC33EP128MC202-I/SP makes it effective for embedded signal conditioning: FIR/IIR filtering, FFT-based analysis, and demodulation all map efficiently onto its single-cycle MAC and dual 40-bit accumulators. Sensor data (vibration, current, pressure) enters through the analog inputs, is filtered or transformed in firmware at 70 MIPS, and the result drives control outputs or communication. With 128 KB of Flash, whole filter coefficient banks and lookup tables reside on-chip, and 16 KB of RAM buffers high-rate sample streams. For OEMs standardizing on one controller, this DSC covers both the real-time DSP workload and the general housekeeping tasks that would otherwise require two separate chips.
Recommended
Education and Prototyping
The 28-pin SPDIP through-hole package of the dsPIC33EP128MC202-I/SP is a major advantage in education and rapid prototyping. It plugs directly into solderless breadboards and zero-insertion-force sockets, tolerates repeated insertion cycles, and is easy to hand-solder or replace after a wiring mistake - unlike QFN or SOIC packages that need hot-air rework. Universities and training courses use this exact part number to teach 16-bit embedded C, DSP concepts, and motor control on the same silicon used in industry. Programming is via the standard 2-wire ICSP interface (any matched PGECx/PGEDx pair) using low-cost PICkit tools, so the full learning setup costs a fraction of comparable DSP development kits.
Recommended
Industrial Automation and Repairable Equipment
Through-hole DIP packaging remains valuable in industrial equipment designed for field serviceability: the dsPIC33EP128MC202-I/SP can be socketed so technicians replace a controller in minutes without soldering equipment. The industrial -40C to +85C temperature rating and 3.0-3.6 V operation fit standard industrial control cabinets and 24 V systems with a regulator stage. The 70 MIPS core handles real-time tasks such as pump sequencing, inverter control, and process interlocks, while the high-speed PWM adds motor or heater drive capability on the same chip. JTAG boundary-scan support eases board-level test, and the 128 KB Flash accommodates firmware upgrades plus bootloaders for remote updates over serial links.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128MC202-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256MC202-I/SP | DSPIC33EP64MC202-I/SP | DSPIC33EP128MC202-H/SP | DSPIC33EP128MC202-I/MM |
|---|---|---|---|---|---|
| Package | 28-SPDIP | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same | 28-QFN-S 6x6 (different) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 128 KB | 256 KB | 64 KB | 128 KB | 128 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | Extended/high-temp grade | -40C to +85C |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Mounting | Through Hole | Through Hole | Through Hole | Through Hole | Surface Mount |
| Key Trade-off | Balanced memory in DIP | Headroom for growth | Lower cost, less flash | Harsh-environment rating | Smaller footprint, SMT only |
Key Differentiators
- More Flash headroom than the 64 KB variant (vs DSPIC33EP64MC202-I/SP)
- Lower cost option exists in the same footprint (vs DSPIC33EP32MC202-I/SP)
- Harsh-environment option without redesign (vs DSPIC33EP128MC202-H/SP)
- Through-hole DIP vs surface-mount QFN (vs DSPIC33EP128MC202-I/MM)
Design Notes
The dsPIC33E internal regulator requires a low-ESR capacitor (about 10 uF with a 0.1 uF ceramic in parallel) on the VCAP/VDDCORE pin, pin 28. Omitting or undersizing this capacitor is the most common cause of brown-out resets and erratic behavior on dsPIC33E designs. All VDD (pins 11, 14) and VSS (pin 8) connections must be made even on minimal prototypes; a single unconnected power pin can cause programming failures. Decouple each VDD pin with 0.1 uF ceramics placed within a few millimeters.
ICSP programming requires matched PGECx/PGEDx pairs: if PGEC2 (pin 15 area) is used for ICSPCLK, ICSPDAT must use the corresponding PGED2. Mixing pins from different pairs fails silently. Keep the MCLR trace short with a 10 kOhm pull-up and do not load pin 4 (PGD/RB2) or pin 5 (PGC/RB3) with heavy capacitive loads if in-circuit debugging is planned. Reserve at least one programming pair exclusively for the ICSP header in production designs.
Separate analog and digital grounds, tying them at a single star point near pin 23 (AVSS). Route PWM outputs (RE0-RE3) away from analog input traces; the fast PWM edges couple noise into the ADC and comparators. For motor-control layouts, add snubber or gate-drive filtering at the inverter side and keep current-sense return paths direct to AVSS. Estimated: adding a small RC filter (e.g., 1 kOhm + 1 nF) on analog inputs modestly reduces ADC noise at the cost of a higher source impedance, so verify acquisition timing per the family datasheet ADC requirements.
Compliance Information
RoHS compliant and lead-free per current Microchip dsPIC33EP production and distributor listings (DigiKey/LCSC). REACH, halogen-free, and conflict-minerals status not stated in provided data.
