DSPIC33FJ32MC101-E/SO - 16-bit DSC 32KB Flash 16MIPS | Microchip
MPN: DSPIC33FJ32MC101-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.36 | $8.36 |
| 10 | $7.52 | $75.20 |
| 100 | $6.24 | $624.00 |
| 500 | $4.96 | $2,480.00 |
| 1,000 | $3.75 | $3,750.00 |
DSPIC33FJ32MC101-E/SO Overview
A digital signal controller combines the computational power of a DSP engine with the peripheral set and ease of use of a microcontroller. Within the power-management hierarchy, the DSC sits between a general-purpose MCU and a dedicated DSP, making it the standard choice for real-time closed-loop control systems such as motor drives and digital power converters. The dsPIC33F family belongs to Microchip's broader 16-bit embedded control portfolio.
Key features include the Motor Control PWM (MCPWM) module with complementary outputs and dead-time control, three analog comparators, the Charge Time Measurement Unit (CTMU) for capacitive touch and precise timing measurement, Real-Time Clock and Calendar (RTCC), and Peripheral Pin Select (PPS) for flexible pin mapping. The modified Harvard architecture with a DSP engine, barrel shifter, and single-cycle MAC supports efficient filtering and control algorithms.
Technically, the device runs from a 3.0V to 3.6V supply, uses CMOS flash technology, and provides multiple low-power modes (idle, sleep) plus fast wake-up. The 24-bit instruction word architecture yields 11K executable instructions from the 32KB Flash, and the 2KB SRAM is organized for DSP-style accumulate operations.
Typical applications include BLDC and PMSM motor control, digital power supplies (LLC, PFC), uninterruptible power supplies, and battery chargers, where the MCPWM and fast analog comparators directly reduce external component count.
Design consideration: budget the 3.0-3.6V supply rail early, and note that the single MCPWM bank must cover all motor phases on this 20-pin variant, so plan PPS mapping before routing.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ32MC101-E/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 DSPIC33FJ32MC101-E/SO (same form factor and footprint) — differing in Package, RTCC, Operating Temperature, Core Architecture, PWM Module.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32MC101-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.05 / Unit
View Datasheet →DSPIC33FJ16MC101-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ16MC101-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32MC102-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.78 / Unit
View Datasheet →DSPIC33FJ32MC202-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.55 / Unit
View Datasheet →DSPIC33FJ12MC202-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32MC101-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F modified Harvard |
| Max CPU Speed | 16 MIPS (32 MHz clock) |
| Program Memory | 32 KB (11K x 24) Flash |
| SRAM | 2 KB |
| Supply Voltage | 3.0 V to 3.6 V |
| Package | 20-lead SOIC (SO) |
| Operating Temperature | -40C to +125C (extended, E) |
| PWM Module | Motor Control PWM (MCPWM) |
| Comparators | 3 analog comparators |
| CTMU | Yes (Charge Time Measurement Unit) |
| RTCC | Yes (Real-Time Clock and Calendar) |
| Peripheral Pin Select | Yes (PPS) |
| DSP Engine | Single-cycle MAC, barrel shifter |
| Technology | CMOS Flash |
| Mounting Type | Surface Mount |
| Low Power Modes | Idle, Sleep |
| RoHS Status | Compliant |
DSPIC33FJ32MC101-E/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset input (active low), programming voltage pin |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive voltage reference / change notification / port B |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative voltage reference / change notification / port B |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select / change notification / port B |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / encoder index / change notification / port B |
| Pin 6 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / encoder phase A / input capture / port B |
| Pin 7 | VSS — Ground reference |
| Pin 8 | OSC1/CLKI/CN7/RA2 — Oscillator crystal input / external clock input / port A |
| Pin 9 | OSC2/CLKO/CN8/RA3/RC15 — Oscillator crystal output / clock output / port A |
| Pin 10 | PGED1/AN5/C1IN-/IC8/T2CK/CN9/RB5 — Programming data 1 / analog input / comparator input / input capture / port B |
| Pin 11 | PGEC1/AN6/OCFA/C2IN+/T3CK/CN10/RB6 — Programming clock 1 / analog input / PWM fault A / comparator input / port B |
| Pin 12 | PGED2/AN7/C2IN-/C1IN+/CN11/RB7 — Programming data 2 / analog input / comparator inputs / port B |
| Pin 13 | PGEC2/AN8/C1OUT/INT0/CN12/RB8 — Programming clock 2 / analog input / comparator 1 output / external interrupt / port B |
| Pin 14 | AN9/C2OUT/FLTA/REFO/CN13/RB9 — Analog input / comparator 2 output / PWM fault A / reference clock out / port B |
| Pin 15 | TMS/CVREF/AN10/C3IN+/CN14/RB10 — Test mode select / comparator voltage reference / analog input / comparator input / port B |
| Pin 16 | TCK/C3IN-/AN11/CN15/RB11 — Test clock / comparator 3 input / analog input / port B |
| Pin 17 | PGD3/TDI/AN12/CN16/RB12 — Programming data 3 / JTAG data in / analog input / port B |
| Pin 18 | PGC3/TDO/AN13/CN17/RB13 — Programming clock 3 / JTAG data out / analog input / port B |
| Pin 19 | VDD — Positive supply, 3.0 V to 3.6 V |
| Pin 20 | AVDD — Analog positive supply (connect to VDD with filter) |
Typical Applications
DSPIC33FJ32MC101-E/SO is suitable for 6 applications: BLDC Motor Control, Digital Power Supplies (PFC/LLC), Uninterruptible Power Supplies (UPS), Battery Chargers, Capacitive Touch Interfaces, Industrial Automation Sensor Nodes.
BLDC Motor Control
The DSPIC33FJ32MC101-E/SO is an ideal controller for sensorless BLDC motor drives because its Motor Control PWM (MCPWM) module generates complementary outputs with hardware dead-time insertion, while the 3 on-chip analog comparators handle cycle-by-cycle overcurrent limiting and back-EMF zero-crossing detection without external ICs. Running at 16 MIPS with a single-cycle MAC DSP engine, the core closes current and speed loops well above the 20 kHz PWM frequency typical for trapezoidal or FOC commutation. The CTMU adds precise timing measurement for position estimation. Placed between the gate-driver stage and current-shunt resistors, the DSC reduces BOM cost by integrating PWM, protection, and control in one 20-pin SOIC rated to +125C for hot motor-housing environments.
Recommended
Digital Power Supplies (PFC/LLC)
Switch-mode power supplies benefit directly from this DSC's architecture: the 16 MIPS core with DSP MAC executes average-current-mode PFC or LLC burst-mode control loops deterministically, while the MCPWM module outputs high-resolution PWM with programmable dead time critical for half-bridge and full-bridge topologies. The 3 comparators implement hardware cycle-by-cycle current limiting for fault protection even if firmware stalls. The extended -40C to +125C rating suits sealed industrial PSU enclosures with limited airflow. Because the DSPIC33FJ32MC101-E/SO runs from a 3.0-3.6V rail, pair it with a small LDO fed from the auxiliary 5V bias winding. Non-linear gain and feed-forward compensation are implemented in firmware, enabling adaptive control across universal AC input ranges.
Recommended
Uninterruptible Power Supplies (UPS)
Line-interactive and double-conversion UPS designs use the DSPIC33FJ32MC101-E/SO to generate the inverter SPWM waveform and control the transfer switch timing. The MCPWM module's complementary PWM outputs with dead-time control drive the inverter H-bridge through gate drivers, while the 12-bit ADC sampling synchronized to the PWM period performs instantaneous current and voltage feedback at the switching frequency. The RTCC maintains battery-test scheduling timestamps, and the extended temperature range supports outdoor telecom cabinet installations. At 16 MIPS, the DSP engine computes RMS values and THD estimates in the control-loop spare time. Firmware-implemented voltage regulation adapts to battery sag without changing hardware, a key advantage over fixed analog control in cost-sensitive UPS designs.
Recommended
Battery Chargers
Smart battery chargers for lead-acid, Li-ion, and LiFePO4 chemistries fit naturally on this DSC. The MCPWM module implements a buck or synchronous-buck charging stage with adjustable frequency and dead time; the on-chip comparators provide hardware overcurrent and overvoltage cutoff independent of firmware; and the CTMU plus ADC inputs measure battery voltage, current, and temperature for CC/CV profile execution with NTC-based thermal derating. The RTCC logs charge-session data. With 16 MIPS of DSP capability, coulomb counting and charge-state estimation run alongside the primary control loop. The extended -40C to +125C operating range makes the DSPIC33FJ32MC101-E/SO suitable for outdoor EVSE-adjacent and solar charge-controller enclosures without a heated compartment.
Recommended
Capacitive Touch Interfaces
The integrated Charge Time Measurement Unit (CTMU) makes the DSPIC33FJ32MC101-E/SO a compact choice for capacitive touch buttons and sliders embedded in motor-driven appliances, power tools, and white goods. The CTMU measures charge time on touch pads with sub-nanosecond resolution; firmware applies baseline tracking, threshold detection, and drift compensation. Because touch sensing shares the same die as the MCPWM motor controller, one 20-pin SOIC replaces separate touch MCU plus motor MCU combinations, cutting BOM count and board area. The 16 MIPS core runs touch acquisition scanning in the idle gaps of the motor-control loop, and the extended temperature rating plus CMOS process ensure stable CTMU behavior from freezer to hot-panel conditions in kitchen and industrial environments.
Recommended
Industrial Automation Sensor Nodes
For industrial control nodes combining sensing with local actuation, the DSPIC33FJ32MC101-E/SO offers Peripheral Pin Select (PPS) to map UART/SPI/I2C to any available pins, easing PCB routing in crowded DIN-rail enclosures. The CTMU supports resistive and capacitive sensor interfacing, the 10/12-bit ADC samples transducer outputs, and the RTCC timestamps events for maintenance logging. UART links to Modbus RTU gateways over RS-485 transceivers, and spare MCPWM outputs drive small actuators, dampers, or alarms. The extended -40C to +125C range suits rooftop HVAC sensors and foundry-adjacent equipment. At 16 MIPS the DSP engine runs digital filtering on noisy analog channels, and 32KB Flash leaves headroom for field-updatable protocol stacks and calibration routines.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32MC101-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32MC101-I/SO | DSPIC33FJ16MC101-E/SO | DSPIC33FJ16MC101-I/SO | DSPIC33FJ32MC202-E/SO |
|---|---|---|---|---|---|
| Package | SOIC-20 | SOIC-20 - same | SOIC-20 - same | SOIC-20 - same | SOIC-28 - differs |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 16 MIPS (32 MHz) | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| Flash Program Memory | 32 KB (11K x 24) | 32 KB | 16 KB | 16 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Operating Temperature | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) |
| MCPWM / Comparators | Yes / 3 | Yes / 3 | Yes / 3 | Yes / 3 | Yes / 3 |
| 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 |
Key Differentiators
- Extended -40C to +125C temperature rating in low-cost SOIC-20 (vs DSPIC33FJ32MC101-I/SO)
- Double the program memory of the 16KB family member (vs DSPIC33FJ16MC101-E/SO)
- Single-package motor control with integrated protection (vs DSPIC33FJ32MC202-E/SO)
Design Notes
The DSPIC33FJ32MC101-E/SO requires a 3.0-3.6V supply with separate VDD (pin 19) and AVDD (pin 20) rails. Estimated: at 16 MIPS the core draws roughly 25-35 mA (typical family figure) plus I/O current; size the LDO or buck accordingly with at least 50% margin. Decouple each supply pin with 0.1 uF ceramic placed within 2 mm, plus 4.7-10 uF bulk near the IC. Filter AVDD through an RC (10 ohm + 1 uF) from VDD to reduce ADC and CTMU noise. GPIO are not 5V tolerant - level-shift any 5V signals.
Keep the crystal loop (OSC1/OSC2, pins 8-9) compact with guard ground, and route PGEC1/PGED1 (pins 11/10) to a standard 5-pin ICSP header for in-circuit programming with PICkit/ICD tools. Because Peripheral Pin Select remaps peripherals, reserve test points on any pins planned for MCPWM outputs before routing. Motor PWM traces should be short and away from analog inputs AN0-AN13. On a 2-layer board, pour ground under the DSC and stitch it with vias to reduce comparator-input noise on the three C1IN/C2IN/C3IN channels.
Three frequent mistakes with this device: (1) leaving AVDD unconnected - analog peripherals and the ADC fail even though digital logic appears to run; (2) choosing the -I variant to save cost in an application whose enclosure exceeds +85C ambient, then seeing field failures - the -E rating to +125C exists for that reason; (3) enabling MCLR pin as GPIO, which locks out in-circuit debugging. Also confirm flash endurance expectations: avoid runtime self-write logging loops from high-wear RTCC-triggered tasks in the 32KB flash.
Compliance Information
Current-production Microchip dsPIC33FJ devices are RoHS-compliant and lead-free per distributor listings (DigiKey, Mouser). AEC-Q100 status not stated in provided data.
