DSPIC33FJ32GP102-I/SO - 16-bit DSC 32KB Flash 28-SOIC | Microchip
MPN: DSPIC33FJ32GP102-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.2 | $42.00 |
| 25 | $3.98 | $99.50 |
| 100 | $3.55 | $355.00 |
| 1,000 | $2.98 | $2,980.00 |
DSPIC33FJ32GP102-I/SO Overview
A digital signal controller is a hybrid device class that merges the deterministic control capabilities of a microcontroller with the multiply-accumulate (MAC) DSP engine of a digital signal processor. In the power-management hierarchy, a DSC sits above general-purpose MCUs for math-intensive embedded control, making the dsPIC33F family a mainstream choice for motor control, digital power, and sensor signal processing.
Key features include the 16-bit modified Harvard architecture with a single-cycle 16x16 multiply and 32-bit divide support, up to 20 remappable peripheral pins (PPS) for flexible PCB routing, three external interrupts, and 5V-tolerant input pins on selected I/O. The device operates from a 3.0V to 3.6V supply (3.3V nominal) and supports multiple low-power modes including idle and doze for battery-sensitive designs.
Technical depth: the dsPIC33F CPU executes most instructions in one instruction cycle at Fcy = Fosc/2, with a hardware DSP module providing dual 40-bit accumulators and X/Y data busses for efficient FIR/IIR filtering. On-chip peripherals include a 10-bit ADC, UART, SPI, and I2C interfaces, input capture and output compare channels, and an internal fast RC oscillator with PLL, reducing external component count.
Typical applications include brushless DC and PMSM motor control, switched-mode power supplies and digital power factor correction, and sensor conditioning in industrial automation where DSP math and deterministic interrupts must coexist.
Design consideration: place a low-ESR capacitor on the VCAP/VDDCORE pin as required by the datasheet, since the internal 1.8V core regulator stability depends directly on it; omitting or undersizing this capacitor is the most common cause of unreliable startup.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ32GP102-I/SO — 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/SO (same form factor and footprint) — differing in Core Architecture, Package, Operating Temperature, Program Memory (Flash), I/O Sink/Source Current.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32GP101-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
Contact for price
View Datasheet →DSPIC33FJ16GP102-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.18 / Unit
View Datasheet →DSPIC33FJ64GP202-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GP302-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ12GP202-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.46 / Unit
View Datasheet →DSPIC33FJ32MC102-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.05 / Unit
View Datasheet →DSPIC33FJ32GP102-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F DSC |
| Max CPU Speed | 16 MIPS |
| Program Memory (Flash) | 32 KB |
| RAM | 2 KB |
| Supply Voltage | 3.0 V to 3.6 V (3.3 V nominal) |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 28-SOIC, 0.3 in (7.5 mm) body width |
| Mounting Type | Surface Mount |
| I/O Pins | Up to 21, with peripheral pin select (PPS) |
| ADC | 10-bit on-chip ADC |
| Communication Interfaces | UART, SPI, I2C |
| External Interrupts | 3 (two remappable) |
| I/O Sink/Source Current | 10 mA or 6 mA standard, up to 16 mA or 12 mA on 5V-tolerant pins |
| Timers/Capture/Compare | Timers, input capture, output compare channels |
| Oscillator | Internal fast RC with PLL, external crystal support |
| Low Power Modes | Idle, Sleep, Doze |
| RoHS Status | Compliant |
DSPIC33FJ32GP102-I/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset / programming voltage input |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / ADC positive reference / change notification |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / ADC negative reference |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / QEI index input |
| Pin 6 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / QEI phase A / capture input |
| Pin 7 | AN5/QEB/IC8/CN7/RB5 — Analog input 5 / QEI phase B / capture input |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN9/RA2 — Crystal oscillator input / external clock input |
| Pin 10 | OSC2/CLKO/RC15 — Crystal oscillator output / clock output |
| Pin 11 | VDD — Positive supply, 3.0V to 3.6V |
| Pin 12 | EMUD1/SDA1/T2CK/U1ATX/CN8/RF2 — Debug data / I2C data / Timer2 clock / alternate UART TX |
| Pin 13 | EMUC1/SCL1/T1CK/U1ARX/CN9/RF3 — Debug clock / I2C clock / Timer1 clock / alternate UART RX |
| Pin 14 | EMUD2/U1TX/SDO1/CN10/RF4 — Debug data / UART transmit / SPI data output |
| Pin 15 | VCAP/VDDCORE — Internal core regulator capacitor connection - fit low-ESR capacitor per datasheet |
| Pin 16 | EMUC3/U1RX/SDI1/CN11/RF5 — Debug clock / UART receive / SPI data input |
| Pin 17 | RP6/SOSCI/CN1/RA3 — Remappable peripheral pin / secondary oscillator input |
| Pin 18 | RP7/SOSCO/T1CK/CN0/RA4 — Remappable peripheral pin / secondary oscillator output / Timer1 clock |
| Pin 19 | VDD — Positive supply, 3.0V to 3.6V |
| Pin 20 | VSS — Ground reference |
| Pin 21 | RB6/CN14 — Bi-directional I/O / change notification (PGD programming clock role) |
| Pin 22 | RB7/CN15 — Bi-directional I/O / change notification (PGC programming data role) |
| Pin 23 | RB8/CN16 — Bi-directional I/O / change notification |
| Pin 24 | RB9/CN17 — Bi-directional I/O / change notification |
| Pin 25 | RB10/CN18 — Bi-directional I/O / change notification |
| Pin 26 | RB11/CN19 — Bi-directional I/O / change notification |
| Pin 27 | RB12/CN20 — Bi-directional I/O / change notification |
| Pin 28 | RB13/CN21 — Bi-directional I/O / change notification |
Typical Applications
DSPIC33FJ32GP102-I/SO is suitable for 6 applications: BLDC Motor Control, Digital Power Supplies (SMPS / PFC), Industrial Sensor Signal Processing, Embedded Audio / Signal Conditioning, Battery-Powered Portable Instruments, Home Appliance Control.
BLDC Motor Control
The DSPIC33FJ32GP102-I/SO's 16 MIPS core with single-cycle 16x16 MAC executes commutation and PI current-loop math fast enough for BLDC and light PMSM drives. Input capture channels read hall sensors or back-EMF zero crossings with timer resolution, while remappable output-compare outputs (PPS) drive the six-step or field-oriented inverter stage without hard-coded routing. Running from a 3.3V rail, the controller interfaces directly with gate-driver ICs through 3.3V logic, and 5V-tolerant selected pins simplify level interfacing. For designs needing complementary PWM with hardware dead-time, the same-footprint DSPIC33FJ32MC102-I/SO is the preferred variant; the GP102 suits sensor-based, moderate-speed drives where the control loop is closed at a few kHz.
Recommended
Digital Power Supplies (SMPS / PFC)
Digital power conversion benefits directly from the DSP engine of the DSPIC33FJ32GP102-I/SO: the dual 40-bit accumulators and hardware MAC implement voltage and current compensators deterministically under interrupt control at the 16 MIPS rate. The 10-bit ADC samples feedback signals such as output voltage and inductor current, and the internal RC oscillator with PLL eliminates crystal cost in non-precision-timing topologies. The 2KB RAM holds filter state and fault logs, and 32KB flash accommodates control code plus a bootloader for field firmware updates via UART. Because switching loops are latency-sensitive, designers should verify interrupt latency against the datasheet timing tables; for higher loop bandwidth, the pin-compatible 64KB or higher-performance family members offer upgrade paths on the same PCB.
Recommended
Industrial Sensor Signal Processing
In industrial automation nodes, the DSPIC33FJ32GP102-I/SO conditions and filters analog sensor data using its DSP MAC hardware, converting noisy 10-bit ADC readings into calibrated engineering values on-chip. The -40C to +85C industrial temperature grade covers factory-floor environments, and the 3.0V-3.6V supply matches common 3.3V industrial logic rails. UART links to SCADA bridges or RS-485 transceivers, SPI connects external precision ADCs or flash, and I2C reads configuration EEPROMs - all routable freely thanks to peripheral pin select, which eases dense PCB layouts. The three external interrupts (two remappable) capture encoder or limit-switch events without polling overhead, keeping the DSP loop deterministic while supervisory tasks run in the main loop.
Recommended
Embedded Audio / Signal Conditioning
The hardware DSP engine of the DSPIC33FJ32GP102-I/SO suits lightweight audio processing - active crossover filtering, AGC, and tone control - in embedded products that cannot justify a full DSP. Audio codecs with I2S-style or SPI streaming interfaces connect through the remappable SPI pins, and the single-cycle MAC sustains FIR filter taps at audio sample rates within the 16 MIPS budget. The internal PLL oscillator removes the need for an external crystal at standard audio-derived frequencies, and the 28-SOIC footprint keeps the BOM compact for consumer enclosures. Designers should budget flash carefully: 32KB holds several hundred filter coefficients plus control code, and the pin-compatible 64KB DSPIC33FJ64GP202-I/SO provides headroom for more presets without layout changes.
Recommended
Battery-Powered Portable Instruments
Portable measurement devices exploit the DSPIC33FJ32GP102-I/SO's low-power modes - Idle, Sleep, and Doze - to stretch battery life between acquisition bursts. The controller wakes from Sleep on external interrupt or watchdog, performs 10-bit ADC sampling and MAC-based averaging or windowing, transmits results over UART or SPI, then returns to Sleep, minimizing average current drawn from a 3.3V Li-ion or primary-cell rail via an LDO. The internal fast RC oscillator eliminates warm-up delay for quick wake-and-measure cycles, and the compact 28-SOIC package fits handheld PCBs. Because the 5V-tolerant selected pins tolerate legacy sensor outputs, interfacing with older 5V peripherals is possible through the datasheet-specified pins, reducing level-shifter component count in mixed-voltage retrofit instruments.
Recommended
Home Appliance Control
Appliance main boards - blenders, fans, pumps, and small heaters - use the DSPIC33FJ32GP102-I/SO as a single-chip control hub combining user-interface scanning, safety supervision, and basic motor or power control. The 16 MIPS core handles touch or button debounce, temperature interpolation from NTC tables, and PID loops concurrently within a state-machine architecture. Remappable I/O (PPS) lets one PCB layout serve multiple product SKUs by reassigning UART, capture, and compare functions in firmware, cutting qualification cost across derivative models. The -40C to +85C rating tolerates unventilated enclosures, and 32KB flash stores multi-language menus plus control code. The on-chip 10-bit ADC reads potentiometers and NTC sensors directly, while the industrial supply range suits transformer-derived 3.3V rails.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32GP102-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32GP101-I/SO | DSPIC33FJ16GP102-I/SO | DSPIC33FJ64GP202-I/SO | DSPIC33FJ32MC102-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| Flash Memory | 32 KB | 16 KB | 16 KB | 64 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 4 KB | 2 KB |
| 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 |
| Peripheral Focus | General purpose (GP) | General purpose (GP) | General purpose (GP) | General purpose (GP) | Motor control (MC) with complementary PWM |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Balanced 32KB flash without paying for unused memory (vs DSPIC33FJ64GP202-I/SO)
- Twice the code space of the entry family member (vs DSPIC33FJ32GP101-I/SO)
- General-purpose peripheral set for mixed workloads (vs DSPIC33FJ32MC102-I/SO)
Design Notes
The VCAP/VDDCORE pin (pin 15) connects to the output of the internal 1.8V core regulator. Fit a low-ESR ceramic capacitor of the value specified in the Microchip datasheet directly at this pin; undersizing or omitting it is the single most common cause of brown-out during power ramp or flash erase/write cycles. Keep the trace short and place a solid via to the ground plane. Do not load this pin externally - it is for the core regulator stabilization only.
Decouple each VDD pin (pins 11 and 19) with a 100nF ceramic capacitor placed within 5mm of the pin, plus one bulk 4.7uF-10uF capacitor per rail. Route MCLR with a 10k pull-up and expose it to the ICSP programming header (MCLR, VDD, VSS, PGC/RB7, PGD/RB6) even in production boards - in-circuit reprogramming via MPLAB SNAP avoids desoldering and supports field firmware updates. PGS/PGD pins double as change-notification I/O, so ensure header circuitry does not disturb normal operation.
Peripheral Pin Select (PPS) remapping must be explicitly locked after configuration, and forgotten lock steps cause intermittent peripheral behavior after resets. Also note that analog-capable RB pins default to analog mode after reset - firmware must clear the ANSx bits before using them as digital I/O, a classic first-boot failure. Finally, oscillator configuration fuses (Fosc/2 = Fcy) are set at programming time; a wrong fuse selection silently halves or doubles the 16 MIPS target, so validate actual Fcy with a timer-toggle measurement.
When driving gate drivers or long traces from output-compare pins, keep switching edges away from the analog RB0-RB5 ADC inputs; PPS remapping allows moving digital functions to the RF-side pins (12-16) to isolate the analog quadrant of the PCB. Use the secondary oscillator pins (17/18) for a 32.768kHz crystal only if real-time clock accuracy is required, since loading capacitors add PCB area otherwise.
Compliance Information
RoHS compliant per distributor listings; REACH and halogen-free status not stated in provided data.
