DSPIC33EP32GP503-I/M5 - 16-bit 70MIPS DSC, 32KB Flash | Microchip
MPN: DSPIC33EP32GP503-I/M5 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.12 | $5.12 |
| 10 | $4.61 | $46.10 |
| 100 | $4.1 | $410.00 |
| 500 | $3.68 | $1,840.00 |
| 1,000 | $3.27 | $3,270.00 |
DSPIC33EP32GP503-I/M5 Overview
A digital signal controller merges the computational capability of a digital signal processor (DSP) with the peripheral set and control architecture of a microcontroller (MCU). Within the power management hierarchy, the dsPIC33E family sits between general-purpose PIC16/PIC18 MCUs and high-end 32-bit MCUs, offering a processing layer optimized for deterministic, math-intensive embedded control such as digital power conversion, motor control loops, and sensor signal processing.
Key features include the 70 MIPS 16-bit pipelined core, on-chip operational amplifiers, comparators, a Peripheral Trigger Generator (PTG) for autonomous peripheral sequencing, and a CAN 2.0B controller. The FindIC listing confirms the 3.3V supply operation, 32KB Flash, and UQFN EP package. Five 16-bit timers, four DMA channels, and four external interrupt sources support complex real-time tasks.
Architecturally, the dsPIC33E core uses a modified Harvard bus with DSP multiply-accumulate (MAC) instructions, barrel shifter, and modulo bit-reversed addressing, enabling efficient FIR/IIR filtering and PID control loops. Advanced analog integration (op-amps and comparators adjacent to the 12-bit ADC pipeline) reduces external component count in closed-loop control systems.
Typical applications include digital switch-mode power supplies (SMPS), brushless DC and PMSM motor control, CAN-networked automotive and industrial nodes, and general-purpose embedded control requiring DSP-level math.
A key design consideration: the H-speed-suffix variants and the I temperature range differ; always verify supply voltage sequencing and MCLR/ICSP pair usage (PGECx/PGEDx must be used as matched pairs) during in-circuit programming.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP32GP503-I/M5 — 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 DSPIC33EP32GP503-I/M5 (same form factor and footprint) — differing in Operating Temperature, Package, Comparators, RAM, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32GP503-H/M5
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP32GP503-E/M5
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.9 / Unit
View Datasheet →DSPIC33EP64GP503-I/M5
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.32 / Unit
View Datasheet →DSPIC33EP16GP503-I/M5
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32GP503-I/M5 Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33E DSC (Harvard, DSP-enhanced) |
| Maximum Clock Frequency | 70 MHz (70 MIPS) |
| Flash Program Memory | 32 KB |
| RAM | 4 KB |
| Supply Voltage | 3.3 V |
| Package | 36-pin UQFN (VTLA, 5x5 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| CAN Controller | Yes (CAN 2.0B) |
| On-chip Op-Amps | Yes |
| Comparators | Yes |
| Peripheral Trigger Generator (PTG) | Yes |
| DMA Channels | 4 |
| Timers | 5 |
| External Interrupt Pins | 4 |
| Hi-Speed PWM | Yes |
| In-Circuit Serial Programming (ICSP) | Yes (multiple PGECx/PGEDx pairs) |
| RoHS Status | Compliant (per Microchip product page) |
DSPIC33EP32GP503-I/M5 36-pin uqfn (vtla, 5x5 mm) with exposed pad Pin Configuration Guide
Pin configuration for DSPIC33EP32GP503-I/M5 (36-pin uqfn (vtla, 5x5 mm) with exposed pad package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for DSPIC33EP32GP503-I/M5.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32GP503-I/M5 is suitable for 6 applications: Digital Switch-Mode Power Supplies, Brushless DC and PMSM Motor Control, CAN-Networked Industrial Nodes, Portable Instrumentation and Sensor Processing, Automotive Body and Auxiliary Control, LED Lighting and Electronic Ballasts.
Digital Switch-Mode Power Supplies
The DSPIC33EP32GP503-I/M5 fits digital SMPS designs because its 70 MIPS core closes voltage/current loops with single-cycle MAC instructions while the Hi-Speed PWM module produces complementary outputs with hardware dead-time insertion. The on-chip op-amps can amplify shunt-resistor current signals directly into the ADC, and four DMA channels move conversion results without CPU intervention, keeping loop latency deterministic. Placed as the sole controller for a half-bridge or LLC stage, it replaces analog compensators with firmware that can adapt gain at runtime. The trade-off is switching-frequency headroom: 70 MIPS supports loops up to a few hundred kHz comfortably, so very high frequency converters should verify cycle budgets in firmware simulation.
Recommended
Brushless DC and PMSM Motor Control
Sensorless or encoder-based FOC for BLDC and PMSM motors maps efficiently onto the DSPIC33EP32GP503-I/M5. The 70 MIPS pipelined core executes Clarke/Park transforms and PID current loops within each PWM period, while five 16-bit timers and the Hi-Speed PWM deliver six complementary channels with dead time. On-chip comparators support cycle-by-cycle overcurrent shutdown, and the CAN controller integrates the drive into industrial networks. Typical usage couples the MCU's op-amp inputs to low-side shunts and runs ADC triggers synchronized to PWM center points for noise-free sampling. Because Flash is 32KB, complete FOC firmware plus a lightweight communication stack fits without external memory.
Recommended
CAN-Networked Industrial Nodes
With an integrated CAN 2.0B controller, the DSPIC33EP32GP503-I/M5 serves as a compact intelligent node in factory automation, HVAC, and building-control networks. The 70 MIPS core handles protocol processing plus application math, four external interrupt pins respond to field events, and the PTG (Peripheral Trigger Generator) sequences ADC sampling and PWM updates autonomously, reducing CPU overhead for periodic telemetry. Typical deployment uses the CAN transceiver on CANTX/CANRX with the node handling sensor acquisition, actuation, and diagnostics. The 36-pin UQFN's exposed pad provides solid grounding for EMC robustness in electrically noisy cabinets, and the -40C to +85C rating covers most industrial ambient conditions.
Recommended
Portable Instrumentation and Sensor Processing
Battery- and hand-held instruments benefit from the DSPIC33EP32GP503-I/M5's combination of DSP throughput and 3.3V single-supply operation. DSP-enhanced instructions (MAC, barrel shift, bit-reversed addressing) accelerate FIR/IIR filtering of ADC samples from vibration, pressure, or acoustic sensors, while 32KB Flash holds calibration tables and a simple UI. The PTG offloads repetitive sample-trigger sequences so sleep currents can be minimized between measurement windows. In practice the device reads a sensor front end through its op-amp-conditioned ADC inputs, applies filtering, and reports via UART or CAN. Designers should budget the 4KB RAM carefully for filter buffers, using DMA double-buffering to keep sample streams continuous.
Recommended
Automotive Body and Auxiliary Control
For non-safety-critical automotive auxiliaries - lighting modules, pump controllers, HVAC actuators - the DSPIC33EP32GP503-I/M5 in its extended-temperature sibling form (E grade) provides CAN connectivity and robust analog integration. The Hi-Speed PWM drives lamp or pump stages, on-chip comparators implement hardware fault protection, and the CAN 2.0B controller communicates on vehicle subnets. The -I grade covers underhood-adjacent zones at -40C to +85C; harsher underhood locations should use the E/M5 variant rated to +125C in the same footprint, enabling one PCB across temperature zones. Designers must confirm AEC-Q100 qualification requirements separately, since standard I-grade parts are not automatically automotive qualified.
Recommended
LED Lighting and Electronic Ballasts
Digital LED drivers and ballasts use the DSPIC33EP32GP503-I/M5's Hi-Speed PWM for precise dimming resolution and its ADC-plus-op-amp path for output current regulation. At 70 MIPS, the controller can run average-current-mode loops at switching frequencies typical of LED drivers while also implementing PFC on the same die, reducing BOM count. The PTG autonomously sequences PWM and ADC triggers for constant-frequency operation, and comparators provide fast overcurrent trip. In a typical buck or boost LED driver, the MCU senses shunt voltage, closes the loop in firmware, and supports DALI or analog dimming interfaces over UART or CAN. Thermal design should use the UQFN exposed pad soldered to a copper pour for heat spreading.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GP503-I/M5 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32GP503-H/M5 | DSPIC33EP32GP503-E/M5 | DSPIC33EP64GP503-I/M5 | DSPIC33EP16GP503-I/M5 |
|---|---|---|---|---|---|
| Package | UQFN-36 (VTLA, 5x5 mm) EP | UQFN-36 (5x5 mm) - same | UQFN-36 (5x5 mm) - same | UQFN-36 (5x5 mm) - same | UQFN-36 (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 70 MHz (70 MIPS) | 60 MHz | 70 MHz | 70 MHz | 70 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 64 KB | 16 KB |
| CAN Controller | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) |
Key Differentiators
- Highest speed grade in family (vs DSPIC33EP32GP503-H/M5)
- Extended-temperature sibling in identical footprint (vs DSPIC33EP32GP503-E/M5)
- Balanced memory/price point (vs DSPIC33EP64GP503-I/M5)
Design Notes
The dsPIC33EP family uses an internal 1.8V core regulator that requires an external low-ESR capacitor (typically 10uF, ceramic) on the VCAP pin - do not omit it or the device will not start. All VDD pins must be tied to a common 3.3V rail with 0.1uF ceramic decoupling placed within 2-3 mm of each VDD/VSS pin pair, plus one bulk 4.7-10uF capacitor. According to Microchip hardware design guidelines, VDD ramp rate should not exceed the specified slew limit; add a 10k pull-down on MCLR if the supply rises slowly.
The UQFN-36 exposed pad is the primary ground return and thermal path - connect it to a solid ground pour with an array of thermal vias (at least 3x3). Use PGECx/PGEDx pairs as matched channels for ICSP: if PGEC2 is used for ICSPCLK, PGED2 must be ICSPDAT, per Microchip programming specifications. Reserve programming-header access on the layout even in production, since in-circuit debugging with MPLAB ICD/SNAP requires unobstructed access to one PGEC/PGED pair, MCLR, VDD, and VSS.
Peripheral Pin Select (PPS) is flexible but error-prone: lock PPS registers (write PPSLOCK sequence) after configuration to prevent runaway firmware from remapping critical outputs like PWM. When using the on-chip op-amps, verify comparator response and input range in the datasheet electrical characteristics rather than assuming rail-to-rail behavior. The 70 MIPS operation requires correct PLL configuration from the FRC or primary oscillator; mismatched PLL settings are the most common bring-up failure on the dsPIC33EP family.
Keep PWM output traces short and away from ADC input traces, since dsPIC33EP ADC sampling windows synchronized to PWM center points can pick up switching edges routed nearby. For current-shunt sensing via the on-chip op-amps, use Kelvin connections at the shunt resistor and place an RC anti-alias filter (e.g., 1k / 1nF) at the ADC input. Estimated: at 3.3V and typical 40-60 mA operating current, trace drops are negligible below 10 cm on 0.2 mm traces, but ground bounce on shared ground returns can corrupt low-level analog readings.
Compliance Information
RoHS compliant and In Production per Microchip product page. Standard industrial (I) grade part; not AEC-Q100 automotive qualified - verify qualification requirements separately for automotive programs.
