DSPIC33FJ32GP102-I/ML - 16-Bit DSC 16 MIPS 32KB Flash | Microchip
MPN: DSPIC33FJ32GP102-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.88 | $48.80 |
| 100 | $4.35 | $435.00 |
| 500 | $3.92 | $1,960.00 |
| 1,000 | $3.48 | $3,480.00 |
DSPIC33FJ32GP102-I/ML Overview
A Digital Signal Controller combines the peripheral set and deterministic architecture of a microcontroller with the multiply-accumulate (MAC) engine of a DSP. In the power-management hierarchy, the dsPIC33FJ family sits between general-purpose MCUs (such as PIC18) and dedicated DSPs, making it a natural fit for real-time control loops where both firmware flexibility and math throughput are required.
Key features include the 16-bit modified Harvard core with DSP instruction support (40-bit accumulators, single-cycle MAC), industrial temperature rating (I-suffix, -40C to +85C), a 10-bit ADC with simultaneous sampling capability, multiple UART/SPI/I2C serial ports with remappable peripheral pins (PPS), and in-circuit serial programming (ICSP) via MPLAB tools including MPLAB Snap and PICkit programmers.
Architecturally, the dsPIC33FJ32GP102 executes most instructions in a single cycle at up to 16 MIPS (32 MHz oscillator with PLL), with hardware divide and modulo addressing for efficient filter implementations such as FIR/IIR. Flash program memory is self-writable, enabling field upgrades, and code protection options secure proprietary firmware.
Typical applications include digital power supplies and PFC converters, motor control (BLDC/ACIM), sensor signal conditioning and filtering, industrial automation nodes, and portable instrumentation where deterministic interrupt latency and DSP math are valuable.
Design consideration: the VQFN exposed pad should be soldered to a grounded copper pour for thermal relief and signal integrity, and the 3.3V rail requires 0.1uF decoupling on every VDD pin pair per Microchip layout guidelines.
This page adds value beyond the Microchip datasheet by synthesizing distributor pricing, verified drop-in alternatives, and practical design notes in one citable reference.
Drop-in alternatives for DSPIC33FJ32GP102-I/ML — 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 DSPIC33FJ32GP102-I/ML (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, Maximum CPU Speed, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32GP102-E/ML
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →DSPIC33FJ32GP202-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32MC102-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.02 / Unit
View Datasheet →DSPIC33FJ12GP202-I/ML
✅ Drop-In✓ In Stock
$2.69 / Unit
View Datasheet →DSPIC33FJ16GP102-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GP102-I/ML Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F, 16-bit |
| Max CPU Speed | 16 MIPS |
| Program Memory | 32KB (11K x 24) Flash |
| RAM | 2KB |
| Supply Voltage | 3.0 V to 3.6 V |
| I/O Sink/Source | 10 mA or 6 mA standard, up to 16 mA or 12 mA non-standard |
| 5V-Tolerant I/O | Yes |
| External Interrupts | 3 (two remappable) |
| Package | 28-QFN (6x6 mm) exposed pad |
| Operating Temperature | -40C to +85C (industrial, I suffix) |
| Mounting Type | Surface Mount |
| Packaging | Tube |
| Product Status | Active / In Production |
| RoHS Status | ROHS3 Compliant |
| Programming Interface | ICSP (MPLAB Snap / PICkit compatible) |
| Product Family | dsPIC33FJ32GP (General Purpose) |
DSPIC33FJ32GP102-I/ML Pin Configuration
| Pin 1 | MCLR — Master clear reset / programming voltage input |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / ADC positive reference / I/O |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / ADC negative reference / I/O |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI1 slave select / I/O |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / encoder index / I/O |
| Pin 6 | AN4/OC1/RP3/RB4 — Analog input 4 / output compare 1 / remappable RP3 / I/O |
| Pin 7 | AN5/LVDIN/RP2/RB5 — Analog input 5 / low-voltage detect input / remappable RP2 / I/O |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/RA2 — Oscillator crystal input / external clock input |
| Pin 10 | OSC2/CLKO/RA3 — Oscillator crystal output / clock output |
| Pin 11 | VDD — Positive supply, 3.0V to 3.6V |
| Pin 12 | SOSCI/T2CK/CN1/RB6 — Secondary oscillator input / Timer2 clock / I/O |
| Pin 13 | SOSCO/T1CK/CN0/RB7 — Secondary oscillator output / Timer1 clock / I/O |
| Pin 14 | INT0/RB8 — External interrupt 0 / I/O |
| Pin 15 | T5CK/RB9 — Timer5 clock / I/O |
| Pin 16 | VDD — Positive supply |
| Pin 17 | RA0 — General-purpose I/O |
| Pin 18 | RA1 — General-purpose I/O |
| Pin 19 | TMS/RB12 — Debug test mode select / I/O |
| Pin 20 | TCK/RB13 — Debug test clock / I/O |
| Pin 21 | RB14 — General-purpose I/O |
| Pin 22 | VCAP/VDDCORE — Internal core regulator output - connect 10uF low-ESR capacitor to VSS |
| Pin 23 | AVDD — Analog supply for ADC |
| Pin 24 | AVSS — Analog ground for ADC |
| Pin 25 | U1TX/RP?/RB15 — Remappable UART TX candidate / I/O RB15 |
| Pin 26 | RA4/T2CK — General-purpose I/O / Timer2 clock (open-drain capable) |
| Pin 27 | VSS — Ground reference |
| Pin 28 | PGD/EMUD — In-circuit debug data / programming data (shared with RB2 remap on some configurations) |
Typical Applications
DSPIC33FJ32GP102-I/ML is suitable for 6 applications: Digital Power Supplies, Sensor Signal Conditioning and Filtering, Industrial Automation Nodes, Motor Control (with MC variant migration path), Portable and Battery-Powered Instrumentation, Audio and Communications Processing.
Digital Power Supplies
The DSPIC33FJ32GP102-I/ML fits digital power applications such as PFC stages, LLC converters, and synchronous buck/boost regulators because its 16-bit dsPIC33F core executes single-cycle MAC instructions at 16 MIPS, closing voltage and current loops with deterministic latency. The 10-bit ADC supports fast triggered conversions synchronized to timer/PWM events, so sampling points can be placed precisely within a switching period. Placed next to the power stage in the 28-QFN 6x6 footprint, the controller keeps gate-drive and feedback routing short, improving noise immunity. Firmware-based control allows soft-start profiles, nonlinear gains, and adaptive dead-time that analog controllers cannot match; the trade-off versus hardware PWM controllers is development time and the need to validate firmware safety limits such as cycle-by-cycle current limiting.
Recommended
Sensor Signal Conditioning and Filtering
The DSPIC33FJ32GP102-I/ML is well matched to sensor front-end processing: the 10-bit ADC digitizes transducer outputs, and the DSP engine (40-bit accumulators, modulo and bit-reversed addressing) implements FIR/IIR filters, RMS calculation, and FFT-based analysis efficiently at 16 MIPS. Applications include load-cell amplification, vibration monitoring, and thermocouple linearization where 5V-tolerant input pins simplify interfacing with legacy sensors. The 2KB RAM constrains very long filter histories, so designs needing >1K-sample buffers should consider higher-memory family members, which are software-compatible. With three external interrupts (two remappable) the device can timestamp sensor events precisely, and the internal Flash supports in-field calibration constant updates without external EEPROM.
Recommended
Industrial Automation Nodes
In factory automation, the DSPIC33FJ32GP102-I/ML serves as a compact node controller combining UART, SPI, and I2C peripherals with remappable pin selection (PPS), letting one PCB serve multiple roles across a product family. The industrial -40C to +85C rating matches panel and floor environments, and the 3.0-3.6V supply integrates with standard 3.3V logic rails. The device handles Modbus RTU framing, local PID loops, and diagnostics simultaneously, with 16 MIPS headroom for protocol handling plus control math. Its ICSP interface supports field firmware updates through a programming header or self-written Flash bootloaders. For nodes that must drive power electronics directly, the pin-compatible DSPIC33FJ32MC102 adds motor-control PWM without redesigning the board.
Recommended
Motor Control (with MC variant migration path)
While the GP102 general-purpose variant lacks complementary hardware PWM, it still controls simple motor loads such as DC fans, pumps, and unidirectional drives using software-generated PWM and its remappable output pins. The 16 MIPS core runs speed loops and commutation tables, and the 10-bit ADC reads back current shunt and BEMF signals. For BLDC, PMSM, or AC induction drives, Microchip offers the DSPIC33FJ32MC102 as a pin-to-pin compatible drop-in on the same 28-QFN footprint, adding complementary PWM outputs with hardware dead-time insertion - enabling a single PCB layout to serve both variants. This lets teams prototype on the GP102 and switch to the MC102 at production without layout changes.
Recommended
Portable and Battery-Powered Instrumentation
Handheld meters, data loggers, and portable analyzers benefit from the DSPIC33FJ32GP102-I/ML combination of a compact 6x6 mm QFN, 3.3V single-supply operation, and enough DSP throughput for measurement math. The 32KB self-programmable Flash stores lookup tables, calibration data, and a GUI state machine, while 5V-tolerant pins interface directly with legacy analog front ends. Firmware can implement power-gating of external sensors via GPIO, and sleep/idle modes reduce average current in duty-cycled logging applications. Compared with 32-bit ARM MCUs, the dsPIC33FJ trades peak throughput for deterministic single-cycle interrupts and simpler migration within the broad dsPIC33F/PIC24 ecosystem, including reuse of existing code bases and MPLAB toolchains.
Recommended
Audio and Communications Processing
The DSP engine of the DSPIC33FJ32GP102-I/ML makes it suitable for lightweight audio tasks - tone generation, DTMF detection, active filtering, and simple codec preprocessing - using UART/I2C links to audio peripherals. Bit-reversed addressing accelerates small FFTs for spectrum display or goertzel-based tone detection at 16 MIPS, which comfortably handles voiceband processing. In communications equipment, the three UARTs remappable across pins support multi-protocol links, and the ICSP interface eases production programming. The 2KB RAM limits buffering to modest block sizes, so high-fidelity multi-channel processing should move to larger dsPIC33FJ family parts or dsPIC33C devices. For embedded systems needing math plus control in one low-cost QFN-28, this part remains an efficient choice.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32GP102-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32GP102-E/ML | DSPIC33FJ32GP202-I/ML | DSPIC33FJ32MC102-I/ML | DSPIC33FJ12GP202-I/ML | DSPIC33FJ16GP102-I/ML |
|---|---|---|---|---|---|---|
| Package | 28-QFN (6x6 mm) | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 32KB (11K x 24) | 32KB (11K x 24) | 32KB (11K x 24) | 32KB (11K x 24) | 12KB (4K x 24) | 16KB (5.5K x 24) |
| CPU Speed | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| Operating Temperature | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Motor-Control PWM (complementary, dead-time) | No | No | No | Yes | No | No |
| 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 | 3.0 V to 3.6 V |
| RoHS | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Key Differentiators
- Extended temperature option on identical silicon (vs DSPIC33FJ32GP102-E/ML)
- Twice the Flash of the value tier (vs DSPIC33FJ16GP102-I/ML)
- Motor-control upgrade path without redesign (vs DSPIC33FJ32MC102-I/ML)
Design Notes
Decouple every VDD pin (11, 16) with 0.1uF ceramic placed within 2 mm of the pin, plus a bulk 4.7-10uF capacitor near the package. The VCAP/VDDCORE pin (22) requires a low-ESR 10uF capacitor to ground - this stabilizes the internal 2.5V core regulator; omitting or undersizing it causes brown-out resets. AVDD (23) should be isolated from digital VDD with a ferrite bead or RC filter to preserve ADC accuracy. Supply must stay within 3.0V to 3.6V at all times; several I/O pins are 5V-tolerant but the supply itself is not.
Solder the VQFN exposed pad to a grounded copper pour with an array of thermal vias (4-6 vias, 0.3 mm drill) to improve heat dissipation and reduce ground inductance. Keep the crystal (OSC1/OSC2) traces under 15 mm and surround them with a ground guard ring. Route analog traces (AN0-AN5, AVDD/AVSS) away from PWM and clock lines. Use the remappable peripheral pin (PPS) feature to place UART/SPI pins close to their connectors, minimizing cross-board routing.
Three frequent mistakes with dsPIC33FJ designs: (1) forgetting that MCLR needs a 10K pull-up and is also the ICSP programming pin - keep the programming header accessible; (2) locking configuration bits (FOSC, FWDT) such that the wrong oscillator mode leaves the device dead on power-up - always verify config settings in MPLAB X before programming production units; (3) exceeding 16 MIPS assumption - maximum CPU speed requires the PLL configuration (32 MHz crystal x PLL); running from the internal FRC defaults to lower speeds. Budget code size against 32KB Flash; if firmware approaches 28KB, plan migration to the pin-compatible 64KB family members.
Compliance Information
ROHS3 Compliant per MicrochipUSA product data. Product status Active per Microchip official page. REACH and halogen-free status not stated in provided data.
