DSPIC33FJ32GP102T-I/SO - 16-Bit 32KB Flash DSC | Microchip
MPN: DSPIC33FJ32GP102T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.46 | $1,230.00 |
| 1,000 | $2.19 | $2,190.00 |
DSPIC33FJ32GP102T-I/SO Overview
A digital signal controller is a hybrid device that combines the real-time control peripherals of a microcontroller (MCU) with the arithmetic throughput of a digital signal processor (DSP). In the product taxonomy, a DSC sits between a general-purpose MCU and a dedicated DSP: it executes single-cycle multiply-accumulate (MAC) operations and barrel shifts while retaining timers, PWM, UART, SPI, and ADC peripherals. The dsPIC33F family is Microchip's 16-bit DSC line, and the GP (general purpose) variants target motor control, power conversion, and sensor-processing designs that need DSP math but not the specialized motor-control PWM of the MC variants.
Key features of the DSPIC33FJ32GP102T-I/SO include 32 KB Flash, 2 KB SRAM, a 16-bit dsPIC core running at up to 32 MHz (16 MIPS), a 10-bit ADC, and up to 35 general-purpose I/O pins. The device supports in-circuit serial programming (ICSP) and in-circuit debugging through the MPLAB Snap or PICkit programmers, and it is supported by the MPLAB X IDE and XC16 compiler toolchain.
The dsPIC33F architecture uses a modified Harvard memory organization with separate program and data buses, allowing instruction fetch and data access in the same cycle. The DSP engine adds a 17x17-bit multiplier, two 40-bit accumulators, and hardware support for fractional and saturation arithmetic, which accelerates filtering, PID control loops, and FFT-based sensing compared with a plain 8-bit or 16-bit MCU.
Typical applications include digital power supplies, brushless DC motor control, industrial sensor signal conditioning, and embedded audio or instrumentation front ends. The 28-pin SOIC package is a good fit for space-constrained control boards that still need a moderate I/O count.
When designing with this device, keep the analog supply (AVDD/AVSS) well decoupled from the digital rail and place the 0.1 uF decoupling capacitors close to the VDD pins. The ICSP programming pins (PGEC/PGED) should be kept free of heavy capacitive loads to avoid programming failures.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for selection, replacement, and layout decisions.
Drop-in alternatives for DSPIC33FJ32GP102T-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 DSPIC33FJ32GP102T-I/SO (same form factor and footprint) — differing in Package, Core Architecture, Program Memory (Flash), ADC, I/O Sink/Source Current.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32GP102T-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32GP102-I/SO
✅ Drop-In✓ In Stock
$2.98 / Unit
View Datasheet →DSPIC33FJ16GP102T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32GP102T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC RISC with DSP engine |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (11K x 24-bit) |
| RAM | 2 KB (1K x 16-bit) |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature Range | -40C to +85C (industrial) |
| Package | 28-pin SOIC (0.295 in / 7.50 mm) |
| Mounting Type | Surface Mount |
| Number of I/O Pins | Up to 35 (pin-multiplexed) |
| ADC Resolution | 10-bit |
| Programming Interface | ICSP (PGEC/PGED), in-circuit debug |
| Development Toolchain | MPLAB X IDE, XC16 compiler, MPLAB Snap/PICkit |
| RoHS Status | Compliant |
| Packaging | Tape & Reel (T/R) |
DSPIC33FJ32GP102T-I/SO Pin Configuration
| Pin 1 | MCLR — Master clear / reset (active low) |
| Pin 2 | EMUD2/AN0/RB0 — Emulator data / analog input 0 / digital I/O RB0 |
| Pin 3 | AN1/RB1 — Analog input 1 / digital I/O RB1 |
| Pin 4 | AN2/RB2 — Analog input 2 / digital I/O RB2 |
| Pin 5 | AN3/RB3 — Analog input 3 / digital I/O RB3 |
| Pin 6 | AN4/RB4 — Analog input 4 / digital I/O RB4 |
| Pin 7 | AN5/RB5 — Analog input 5 / digital I/O RB5 |
| Pin 8 | AN6/RB6 — Analog input 6 / digital I/O RB6 |
| Pin 9 | AN7/RB7 — Analog input 7 / digital I/O RB7 |
| Pin 10 | VDD — Positive digital supply (3.3 V) |
| Pin 11 | VSS — Digital ground |
| Pin 12 | OSC1/CLKI — Primary oscillator input / external clock input |
| Pin 13 | OSC2/CLKO — Primary oscillator output / clock output |
| Pin 14 | PGEC1/AN8/RB8 — ICSP clock / analog input 8 / digital I/O RB8 |
| Pin 15 | PGED1/AN9/RB9 — ICSP data / analog input 9 / digital I/O RB9 |
| Pin 16 | AN10/RB10 — Analog input 10 / digital I/O RB10 |
| Pin 17 | AN11/RB11 — Analog input 11 / digital I/O RB11 |
| Pin 18 | AN12/RB12 — Analog input 12 / digital I/O RB12 |
| Pin 19 | AN13/RB13 — Analog input 13 / digital I/O RB13 |
| Pin 20 | AN14/RB14 — Analog input 14 / digital I/O RB14 |
| Pin 21 | AN15/RB15 — Analog input 15 / digital I/O RB15 |
| Pin 22 | AVDD — Positive analog supply |
| Pin 23 | AVSS — Analog ground |
| Pin 24 | VDD — Positive digital supply (3.3 V) |
| Pin 25 | VSS — Digital ground |
| Pin 26 | PGC/EMUC/RB6 — ICSP clock / emulator / digital I/O (multiplexed) |
| Pin 27 | PGD/EMUD/RB7 — ICSP data / emulator / digital I/O (multiplexed) |
| Pin 28 | VDD — Positive digital supply (3.3 V) |
Typical Applications
DSPIC33FJ32GP102T-I/SO is suitable for 6 applications: Digital Power Supply Control, Brushless DC Motor Control, Industrial Sensor Signal Conditioning, Embedded Audio Processing, Portable Instrumentation, Automotive Body and Sensor Nodes.
Digital Power Supply Control
The DSPIC33FJ32GP102T-I/SO fits digital power supply control because its dsPIC core delivers 16 MIPS with single-cycle 17x17-bit MAC operations, enough to close a voltage or current loop at switching frequencies in the tens of kHz. The 10-bit ADC samples the output rail while the general-purpose PWM drives the power stage, and the 32 KB Flash holds the control law plus soft-start and protection routines. Placed on the secondary side, the device replaces an analog PWM controller and lets the designer tune loop compensation in firmware. The trade-off is that the 10-bit ADC limits measurement resolution compared with a dedicated 12-bit power controller, so designs needing tight regulation should average multiple samples or add an external ADC.
Recommended
Brushless DC Motor Control
The DSPIC33FJ32GP102T-I/SO suits brushless DC motor control because the DSP engine executes field-oriented control math - Clarke/Park transforms and PI current loops - in real time at 16 MIPS, while the on-chip ADC samples phase currents and the PWM block drives the three-phase inverter. The 2 KB RAM is adequate for a single-motor FOC implementation with modest state variables, and the 28-pin SOIC keeps the control board compact. The GP variant provides general-purpose PWM rather than the dedicated motor-control PWM with dead-time insertion found on dsPIC33FJ32MC102, so designers needing complementary outputs with hardware dead time should evaluate the MC variant. For simple trapezoidal commutation, the GP102 is more than sufficient.
Recommended
Industrial Sensor Signal Conditioning
The DSPIC33FJ32GP102T-I/SO is well suited to industrial sensor signal conditioning because its hardware MAC unit runs FIR and IIR digital filters in real time, removing analog filter drift from the signal chain. A 10-bit ADC digitizes the transducer output, the DSP engine applies gain, offset, and filtering, and the result is reported over UART or SPI. The 3.0-3.6 V supply matches standard 3.3 V industrial logic, and the -40C to +85C industrial rating covers most factory-floor environments. The main limitation is the 10-bit ADC resolution, which constrains dynamic range to roughly 60 dB; precision instrumentation should pair the device with an external 16-bit ADC and use the DSC only for filtering and communication.
Recommended
Embedded Audio Processing
The DSPIC33FJ32GP102T-I/SO can handle embedded audio processing because the dsPIC DSP engine performs biquad filtering, equalization, and simple FFT analysis at 16 MIPS, fast enough for voice-band and low-sample-rate audio. The 32 KB Flash stores filter coefficient tables and codec control routines, while the 2 KB RAM buffers a small number of audio samples. The device is typically placed between an external audio codec and a host processor, applying fixed-function DSP before the signal is forwarded. The trade-off is memory: 2 KB RAM limits buffering to short blocks, so high-fidelity or multi-channel audio requires a larger dsPIC33F device or an external codec with on-chip DSP.
Recommended
Portable Instrumentation
The DSPIC33FJ32GP102T-I/SO fits portable instrumentation because it combines DSP math, a 10-bit ADC, and serial interfaces in a single 28-pin SOIC that draws modest current from a 3.3 V rail. Handheld meters, data loggers, and field analyzers use the device to sample sensors, apply calibration and filtering in firmware, and stream results over UART or SPI to a display or radio. The 32 KB Flash holds calibration tables and measurement routines, and the industrial temperature rating supports outdoor use. The design consideration is power: the dsPIC33F core has no dedicated low-power sleep mode as deep as a dedicated MSP430-class MCU, so battery life depends on duty-cycling the CPU and peripherals aggressively.
Recommended
Automotive Body and Sensor Nodes
The DSPIC33FJ32GP102T-I/SO can serve automotive body and sensor nodes when paired with its AEC-Q100 qualified sibling, the DSPIC33FJ32GP102T-E/SO, which shares the same 28-pin SOIC footprint and 32 KB Flash. In this role the DSC filters and linearizes sensor inputs - position, pressure, current - and reports over CAN or LIN through an external transceiver. The DSP engine handles oversampling and digital filtering that would otherwise require analog circuitry, reducing component count. The key design consideration is qualification: the I-grade part is rated only to +85C, so under-hood or high-temperature nodes must use the E-grade device to meet automotive temperature and reliability requirements.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32GP102T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32GP102T-E/SO | DSPIC33FJ32GP102-I/SO | DSPIC33FJ32GP102T-I/SS | DSPIC33FJ32GP101-I/P |
|---|---|---|---|---|---|
| Package | 28-pin SOIC (0.295 in) | 28-pin SOIC (0.295 in) - same | 28-pin SOIC (0.295 in) - same | 28-pin SSOP - different | 28-pin PDIP - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB |
| CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| 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 |
| Operating Temperature | -40C to +85C (industrial) | -40C to +125C (extended/AEC-Q100) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Packaging | Tape & Reel | Tape & Reel | Tube | Tape & Reel | Tube |
| AEC-Q100 Qualification | Not qualified | Qualified | Not qualified | Not qualified | Not qualified |
| Programming Interface | ICSP (PGEC/PGED) | ICSP (PGEC/PGED) | ICSP (PGEC/PGED) | ICSP (PGEC/PGED) | ICSP (PGEC/PGED) |
Key Differentiators
- AEC-Q100 qualified drop-in option in the same footprint (vs DSPIC33FJ32GP102T-E/SO)
- Tape-and-reel packaging for automated assembly (vs DSPIC33FJ32GP102-I/SO)
- Surface-mount SOIC footprint versus through-hole PDIP (vs DSPIC33FJ32GP101-I/P)
- Higher Flash and RAM than the 16 KB family member (vs DSPIC33FJ16GP102T-I/SO)
Design Notes
Decouple every VDD pin (pins 10, 24, 28) with a 0.1 uF ceramic capacitor placed within 2 mm of the pin, and add a 10 uF bulk capacitor on the 3.3 V rail. The analog supply AVDD (pin 22) should be filtered separately from the digital rail with a ferrite bead or RC network and its own 0.1 uF capacitor to keep ADC noise low. Keep AVSS (pin 23) tied to the same ground plane as VSS but route the analog return away from switching currents.
Keep the ICSP programming pins PGEC1/PGED1 (pins 14 and 15) free of heavy capacitive loads and long stubs; Microchip recommends a short, direct trace to the programming header. If these pins are reused as analog inputs AN8/AN9, isolate the programming header with series resistors (typically 100 ohm) so the debugger can drive the lines without being loaded by the analog network.
Do not exceed the 3.6 V maximum supply voltage; the dsPIC33F core is not 5 V tolerant, so any 5 V peripheral must be level-shifted before connecting to the I/O pins. Also verify the oscillator configuration bits in the MPLAB X project - an incorrect FOSC setting is the most common cause of a device that programs successfully but does not run. Estimated: at 32 MHz and 3.3 V the core current is on the order of tens of mA, so budget the regulator accordingly.
Compliance Information
RoHS compliance and lead-free status are stated on distributor listings for the DSPIC33FJ32GP102T-I/SO. The industrial I-grade part is not AEC-Q100 qualified; the DSPIC33FJ32GP102T-E/SO variant is the AEC-Q100 qualified option. REACH, halogen-free, and conflict-minerals status were not present in the verified data.
