DSPIC33EP32GP502-I/SP - 16-bit DSC 32KB Flash 70 MIPS | Microchip
MPN: DSPIC33EP32GP502-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.62 | $5.62 |
| 10 | $5.06 | $50.60 |
| 100 | $4.51 | $451.00 |
| 500 | $4.05 | $2,025.00 |
| 1,000 | $3.62 | $3,620.00 |
DSPIC33EP32GP502-I/SP Overview
A Digital Signal Controller combines the computational throughput of a DSP with the peripheral integration and deterministic interrupt structure of a microcontroller. In the power-management hierarchy of embedded systems, the DSC sits between a general-purpose MCU and a dedicated DSP, making dsPIC33E devices the standard choice for control loops, digital filtering, and motor/power conversion tasks where 16-bit arithmetic and fast multiply-accumulate (MAC) operations are required.
Key features of the DSPIC33EP32GP502 include a 16-bit modified Harvard architecture core executing up to 70 MIPS at 3.0V to 3.6V, high-speed PWM peripherals for digital power conversion, superior 12-bit ADC performance for precision analog sampling, and communication interfaces suited for general purpose embedded designs. The industrial (-I) temperature rating of -40C to +85C covers most commercial and industrial environments, while Microchip also offers an extended -40C to +125C option within the same family.
Technically, the dsPIC33EP core supports DSP instruction extensions including single-cycle MAC, dual operand fetch, and modulo and bit-reversed addressing, which accelerate FIR/IIR filtering, FFTs, and PI control loops. The Peripheral Trigger Generator (PTG) and rich interrupt vector architecture allow low-latency, deterministic responses essential for closed-loop control.
Typical applications include switch-mode power supplies and digital lighting ballasts (high-speed PWM), sensor signal conditioning with on-chip digital filtering, and general purpose embedded control where 16-bit precision outperforms 8-bit MCUs.
Design consideration: the 28-pin SPDIP package suits prototyping and through-hole production boards, but flash is limited to 32 KB, so applications should budget code size carefully before selecting the 64 KB or 128 KB family variants.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP32GP502-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 DSPIC33EP32GP502-I/SP (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, Program Memory (Flash), CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP64GP502-I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.55 / Unit
View Datasheet →DSPIC33EP128GP502-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32GP502-E/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.52 / Unit
View Datasheet →DSPIC33EP128MU502-E/SP
✅ Drop-In✓ In Stock
$4.55 / Unit
View Datasheet →DSPIC33EP32GP502-I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33E (modified Harvard) |
| Max Core Speed | 70 MIPS |
| Flash Program Memory | 32 KB |
| RAM | 4 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 28-pin SPDIP (SP) |
| Mounting Type | Through Hole |
| ADC Resolution | 10-bit / 12-bit |
| PWM | High-speed PWM for digital power conversion |
| Communication Interfaces | UART, SPI, I2C, CAN-ready family peripherals |
| DSP Instructions | Single-cycle MAC, modulo and bit-reversed addressing |
| Extended Temp Option | -40C to +125C (E variant, family option) |
| RoHS Status | Compliant |
| Product Family | dsPIC33EP general purpose DSC |
| Family Highlights | CAN, CTMU, Op Amps, Peripheral Trigger Generator (PTG) |
DSPIC33EP32GP502-I/SP Pin Configuration
| Pin 1 | MCLR — Master clear reset / ICSP programming voltage input (active low) |
| Pin 2 | AN0/CN2/RB0 — Analog input 0 / change notification / port B bit 0, VREF+ |
| Pin 3 | AN1/CN3/RB1 — Analog input 1 / change notification / port B bit 1, VREF- |
| Pin 4 | AN2/RB2 — Analog input 2 / port B bit 2 |
| Pin 5 | AN3/RB3 — Analog input 3 / port B bit 3 |
| Pin 6 | AN4/RB4 — Analog input 4 / port B bit 4 |
| Pin 7 | AN5/RB5 — Analog input 5 / port B bit 5 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Pin 10 | OSC2/CLKO/RC15 — Oscillator crystal output / clock output / port C bit 15 |
| Pin 11 | VDD — Power supply (3.0 V to 3.6 V) |
| Pin 12 | RP0/RE0 — Remappable peripheral pin / port E bit 0 (PWM/UART/SPI assignable via PPS) |
| Pin 13 | RP1/RE1 — Remappable peripheral pin / port E bit 1 |
| Pin 14 | RP2/SOSCI/RE2 — Remappable peripheral pin / secondary oscillator input / port E bit 2 |
| Pin 15 | RP3/SOSCO/RE3 — Remappable peripheral pin / secondary oscillator output / port E bit 3 |
| Pin 16 | VSS — Ground reference |
| Pin 17 | VDD — Power supply |
| Pin 18 | RP4/RE4 — Remappable peripheral pin / port E bit 4 |
| Pin 19 | RP5/RE5 — Remappable peripheral pin / port E bit 5 |
| Pin 20 | VCAP/VDDCORE — Internal core regulator capacitor pin - connect low-ESR capacitor to VSS (do not connect to VDD) |
| Pin 21 | RP6/RE6 — Remappable peripheral pin / port E bit 6 |
| Pin 22 | RP7/RE7 — Remappable peripheral pin / port E bit 7 |
| Pin 23 | AN9/RP8/RB7 — Analog input / remappable peripheral pin / port B bit 7 |
| Pin 24 | AN10/RP9/RB8 — Analog input / remappable peripheral pin / port B bit 8 |
| Pin 25 | AN11/RP10/RB9 — Analog input / remappable peripheral pin / port B bit 9 |
| Pin 26 | PGD/AN12/RP11/RB10 — ICSP data / analog input / remappable peripheral pin / port B bit 10 |
| Pin 27 | PGC/AN13/RP12/RB11 — ICSP clock / analog input / remappable peripheral pin / port B bit 11 |
| Pin 28 | AVDD/AVSS-region — Analog power/reference pins per datasheet pinning diagram |
Typical Applications
DSPIC33EP32GP502-I/SP is suitable for 6 applications: Digital Power Supply Control, Digital Lighting Ballasts and LED Drivers, Sensor Signal Conditioning with Digital Filtering, Motor Control (BLDC/DC Servo), General Purpose Embedded Control, Through-Hole Prototyping and Education Platforms.
Digital Power Supply Control
The DSPIC33EP32GP502-I/SP fits digital switch-mode power supply control because the dsPIC33E general purpose family provides high-speed PWM peripherals purpose-built for power conversion topologies such as buck, boost, LLC, and PFC stages. The 70 MIPS core executes single-cycle multiply-accumulate instructions, so a 100 kHz-class PI or 3P3Z compensation loop consumes only a fraction of the CPU budget, leaving margin for housekeeping and communication tasks. Placed as the sole supervisory controller, it samples output voltage and current via the high-performance 12-bit ADC with deterministic interrupt latency, then updates PWM duty cycle within one switching period. Compared with an 8-bit MCU, the 16-bit DSP math avoids fixed-point saturation issues in wide-dynamic-range current loops. Design trade-off: budget flash carefully at 32 KB - complex multi-loop firmware may require the 64 KB or 128 KB pin-compatible siblings.
Recommended
Digital Lighting Ballasts and LED Drivers
The DSPIC33EP32GP502-I/SP is well matched to digital lighting applications because Microchip explicitly positions the dsPIC33E family for ballast and LED driver control, where precise high-frequency PWM and fast analog feedback are mandatory. The high-speed PWM block generates complementary outputs with programmable dead time for half-bridge stages, while the 70 MIPS DSP core runs dimming algorithms, PFC loops, and fault protection (over-current trip via comparator/ADC paths) in hardware-assisted timeframes. In a typical implementation the controller drives a resonant half-bridge, samples lamp or LED-string current each cycle, and adjusts frequency or duty cycle for constant-current regulation at 1-2% accuracy achievable with 12-bit ADC sampling. The industrial -40C to +85C rating covers enclosed luminaire environments. Use the 28-pin SPDIP for prototype and through-hole lamp service boards, migrating to SMD packages for production volume.
Recommended
Sensor Signal Conditioning with Digital Filtering
The DSPIC33EP32GP502-I/SP excels at embedded sensor signal conditioning because its DSP instruction set - single-cycle MAC, modulo and bit-reversed addressing - accelerates FIR and IIR filters, RMS computation, and FFT-based spectrum analysis directly on-chip without an external DSP. The high-performance 12-bit ADC captures sensor outputs at up to hundreds of ksps, and the Peripheral Trigger Generator can chain ADC conversions to PWM timing or CTMU excitation without CPU intervention, producing jitter-free sampling windows. A typical chain routes a bridge or piezo sensor through a front-end amplifier into the ADC, then applies a 64-tap FIR filter in a few microseconds at 70 MIPS. The 4 KB RAM accommodates coefficient tables and buffering for moderate filter orders; verify stack and heap sizing at 32 KB flash. This eliminates a separate filter IC and lowers BOM cost in industrial transmitters.
Recommended
Motor Control (BLDC/DC Servo)
The DSPIC33EP32GP502-I/SP supports brushless DC and servo motor control through its high-speed PWM outputs with complementary mode and hardware dead-time insertion, required for three-phase inverter bridges. At 70 MIPS, the core executes field-oriented control (FOC) inner loops with single-cycle MAC operations, and the fast ADC can sample phase currents at center-aligned PWM instants to minimize switching-noise corruption - a technique standard in Microchip motor control reference designs for the dsPIC33E family. The Peripheral Pin Select feature remaps RPx pins so encoder (QEA/QEB) or hall sensor inputs land exactly where the PCB routing demands, a significant advantage in constrained 28-pin layouts. The 32 KB flash holds a complete sensored or sensorless FOC stack for single-motor applications; use the pin-compatible 128 KB variant for multi-axis or advanced estimator firmware.
Recommended
General Purpose Embedded Control
The DSPIC33EP32GP502-I/SP serves as a strong general purpose controller when an application outgrows 8-bit MCUs but does not justify a full 32-bit ARM platform. Microchip positions the dsPIC33E general purpose family for high-end general purpose tasks, offering UART, SPI, and I2C with Peripheral Pin Select for flexible pin assignment, plus deterministic interrupt behavior for real-time sequencing. Typical deployments include industrial sensor nodes, HVAC control boards, charge management logic, and lab instrumentation front panels, where the 70 MIPS core handles protocol stacks plus periodic control tasks concurrently. The 28-pin SPDIP through-hole package is particularly suited to prototype builds, repair-friendly service hardware, and education platforms where DIP sockets are valued. Development uses the free XC16 compiler and low-cost PICkit/ SNAP programmers, keeping the total toolchain cost among the lowest of any 16-bit platform.
Recommended
Through-Hole Prototyping and Education Platforms
The DSPIC33EP32GP502-I/SP is ideal for prototyping and teaching environments because the SPDIP-28 package inserts directly into standard DIP sockets and breadboard adapters, unlike the surface-mount variants of the same die. Students and engineers gain access to a genuine 16-bit DSP-class core (70 MIPS, hardware MAC) with industrial peripherals - high-speed PWM, 12-bit ADC, CTMU for capacitive/timing measurement - at DIP-package convenience. The ICSP programming interface (MCLR, PGD, PGC) requires only five wires to a PICkit or SNAP programmer, and MPLAB X with the free XC16 compiler covers the complete toolchain. In coursework, the same board can progress from blinking LEDs to running digital filters and motor control loops without hardware changes. Note the 3.0V to 3.6V supply requirement: breadboard labs need a regulated 3.3V source, and 5V signals must be level-shifted.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GP502-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP64GP502-I/SP | DSPIC33EP128GP502-I/SP | DSPIC33EP32GP502-E/SP | DSPIC33EP128MU502-E/SP |
|---|---|---|---|---|---|
| Package | 28-pin SPDIP (SP) | 28-pin SPDIP (SP) - same | 28-pin SPDIP (SP) - same | 28-pin SPDIP (SP) - same | 28-pin SPDIP (SP) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 64 KB | 128 KB | 32 KB | 128 KB |
| Core Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +125C |
| 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 |
| Family / Special Feature | dsPIC33EP GP (PWM, ADC, PTG) | dsPIC33EP GP, 2x flash | dsPIC33EP GP, 4x flash | dsPIC33EP GP, extended temp | dsPIC33EP MU (USB-capable), extended temp |
Key Differentiators
- Lowest-cost entry into the 28-pin dsPIC33EP family (vs DSPIC33EP128GP502-I/SP)
- Extended temperature availability in identical footprint (vs DSPIC33EP32GP502-E/SP)
- General purpose peripheral set vs USB-focused MU die (vs DSPIC33EP128MU502-E/SP)
Design Notes
The VCAP/VDDCORE pin (pin 20) must have a low-ESR stabilizing capacitor (typically 10 uF tantalum or ceramic per Microchip layout guidelines) to ground for the internal core regulator. Never connect VDDCORE to the 3.3V rail. Supply the device from a clean 3.0-3.6 V rail; exceeding 3.6 V on VDD is out of specification and can damage the part. Estimated: with a typical active current in the tens of mA at 70 MIPS, a 3.3 V rail delivering 100 mA covers the DSC plus a small sensor load.
For through-hole SPDIP prototyping, keep decoupling capacitors (100 nF ceramic across each VDD/VSS pair) within a few centimeters of the pins; long DIP-socket leads increase ground bounce during simultaneous PWM switching. Route analog inputs (AN0-AN13) away from PWM traces. Use the AVDD/AVSS reference pins per the datasheet pinning diagram with local filtering to preserve ADC accuracy when sampling switch-node feedback in digital power designs.
Three frequent mistakes with this part: (1) applying 5 V logic directly to RPx pins - the dsPIC33E is a 3.0-3.6 V device and inputs are not 5 V tolerant, so level-shift any 5 V signals; (2) forgetting that 32 KB flash fills quickly with FOC firmware plus bootloader - compile early against the 64 KB/128 KB pin-compatible variants if code size is uncertain; (3) omitting the ICSP header (MCLR, PGC, PGD, VDD, VSS) - retrofitting it to a soldered DIP design is easy, but plan it for in-circuit reprogramming.
Compliance Information
RoHS/lead-free per standard Microchip policy for active catalog devices; obtain product-specific certificates from the Microchip compliance portal for this MPN.
