DSPIC33FJ32MC101-I/P - 16-Bit 16MIPS DSC 32KB DIP-20 | Microchip
MPN: DSPIC33FJ32MC101-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.01 | $3.01 |
| 10 | $2.78 | $27.80 |
| 100 | $2.55 | $255.00 |
| 500 | $2.35 | $1,175.00 |
| 1,000 | $2.18 | $2,180.00 |
DSPIC33FJ32MC101-I/P Overview
A digital signal controller combines the computational architecture of a microcontroller with DSP features such as a hardware multiplier, barrel shifter, and single-cycle MAC instructions. Within the power-management hierarchy, the DSC sits between a general-purpose MCU and a dedicated DSP, making the dsPIC33F family a common choice for closed-loop motor control and digital power conversion.
Key differentiating features include the motor control PWM (MCPWM) module for complementary or independent PWM generation, the Charge Time Measurement Unit (CTMU) for capacitive touch and precision timing, and Peripheral Pin Select (PPS), which lets designers remap digital peripherals such as UART and SPI to almost any RPn pin for maximum board-layout flexibility.
Technically, the device runs from a 3.0V to 3.6V supply and uses CMOS process technology with low-power modes including idle and sleep. Its modified Harvard architecture with DSP instruction extensions executes 16-bit fixed-point operations efficiently, supported by dual operands and modulo and bit-reversed addressing modes. Flash self-programming supports field firmware updates, and In-Circuit Serial Programming (ICSP) enables programming through just two I/O pins plus MCLR.
Typical applications include brushed and brushless DC motor control, digital power supplies, electronic ballasts, and embedded control in industrial automation where low pin count and low cost matter. The 20-pin PDIP also suits prototyping and through-hole production.
Design consideration: keep VCAP/VDDCORE pin decoupled per the datasheet and remember the exposed metal pad underneath is recommended to be externally connected to VSS.
This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33FJ32MC101-I/P — 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-I/P (same form factor and footprint) — differing in Package, Supply Voltage, Motor Control PWM, Mounting Type, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32MC101-E/P
✅ Drop-In✓ In Stock
$3.2 / Unit
View Datasheet →DSPIC33FJ32GP101-I/P
✅ Drop-In✓ In Stock
$3.63 / Unit
View Datasheet →DSPIC33FJ16MC101-E/P
✅ Drop-In✓ In Stock
$3.38 / Unit
View Datasheet →DSPIC33FJ16MC101-I/P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GP101-E/P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32MC101-I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F DSC |
| Maximum Clock Frequency | 32 MHz |
| Performance | 16 MIPS |
| Program Memory | 32 KB (11K x 24) Flash |
| RAM | 2 KB |
| Supply Voltage | 3 V to 3.6 V (3.3 V nominal) |
| Package | 20-PDIP (0.300 in, 7.62 mm) |
| Mounting Type | Through Hole |
| Operating Temperature | -40C to +85C (I grade) |
| Motor Control PWM | MCPWM module |
| CTMU | Charge Time Measurement Unit included |
| Peripheral Pin Select | PPS supported |
| Programming Interface | ICSP / In-Circuit Debug (2-wire) |
| Process Technology | CMOS |
| Low Power Modes | Idle, Sleep |
| RoHS Status | Compliant |
DSPIC33FJ32MC101-I/P Pin Configuration
| Pin 1 | MCLR — Master clear reset input / programming voltage |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive voltage reference |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative voltage reference |
| Pin 4 | AN2/CN4/RB2 — Analog input 2 / digital I/O |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / encoder index input |
| Pin 6 | VSS — Ground reference |
| Pin 7 | OSC1/CLKI/CN6/RA2 — Oscillator crystal input / external clock input |
| Pin 8 | OSC2/CLKO/RC15 — Oscillator crystal output / clock output |
| Pin 9 | VDD — Positive supply (3.0V to 3.6V) |
| Pin 10 | RP0/CN14/RF0 — Remappable peripheral pin 0 / digital I/O |
| Pin 11 | RP1/CN15/RF1 — Remappable peripheral pin 1 / digital I/O |
| Pin 12 | RP2/CN16/RF2 — Remappable peripheral pin 2 / digital I/O |
| Pin 13 | RP3/CN17/RF3 — Remappable peripheral pin 3 / digital I/O |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RP4/SOSCO/T2CK/CN1/RC14 — Remappable pin 4 / secondary oscillator output / Timer2 clock |
| Pin 16 | RP5/SOSCI/T1CK/CN0/RC13 — Remappable pin 5 / secondary oscillator input / Timer1 clock |
| Pin 17 | VCAP/VDDCORE — Internal core voltage regulator capacitor connection (external capacitor to VSS required) |
| Pin 18 | RP6/CN8/RB4 — Remappable peripheral pin 6 / digital I/O |
| Pin 19 | RP7/CN9/RB5 — Remappable peripheral pin 7 / digital I/O |
| Pin 20 | VDD — Positive supply (3.0V to 3.6V) |
Typical Applications
DSPIC33FJ32MC101-I/P is suitable for 6 applications: Brushed DC Motor Control, Brushless DC (BLDC) Motor Drive, Digital Power Supplies, Industrial Automation Nodes, Electronic Lighting Ballasts, Embedded Prototyping and Education.
Brushed DC Motor Control
The DSPIC33FJ32MC101-I/P suits brushed DC motor drive nodes where a single PWM channel with direction control is sufficient. The MCPWM module generates the switching waveform at up to 16 MIPS control-loop headroom, while the 10-bit ADC samples current shunt feedback for closed-loop torque regulation. In a typical H-bridge drive, the DSC reads a potentiometer or command input, executes a PI current loop every few PWM cycles, and adjusts duty cycle through the gate driver. The 20-pin PDIP footprint keeps the control PCB minimal, and Peripheral Pin Select lets the PWM output land on the most convenient routing pin. Because the part is through-hole, it also simplifies prototyping and low-volume repair of drive boards.
Recommended
Brushless DC (BLDC) Motor Drive
For sensor-based BLDC control, the DSPIC33FJ32MC101-I/P combines its MCPWM module with PPS-routed input capture pins for Hall-sensor commutation. The 16-bit DSP core with single-cycle MAC instructions runs the commutation state machine and current limiting at 16 MIPS, comfortably handling 20 kHz+ PWM frequencies. Complementary PWM outputs with dead-time insertion drive a three-phase inverter through a gate driver. The CTMU can also assist with capacitive position sensing in sensorless variants. With 32KB Flash there is room for a full commutation table, PI current loops, and communication firmware. The -40C to +85C industrial range covers appliance and industrial fan environments without derating the control electronics.
Recommended
Digital Power Supplies
The DSPIC33FJ32MC101-I/P works as a digital controller for AC-DC and DC-DC converters in the sub-500 W class. Its fast 16-bit core closes voltage-mode or average-current-mode loops at PWM frequencies of 100 kHz or more, while the 10-bit ADC triggered by the PWM module samples output voltage at consistent intervals, minimizing control jitter. PPS allows UART or SPI telemetry to be placed anywhere on the 20-pin device for power-supply status reporting. The 2KB RAM holds compensation state and fault logs, and Flash self-programming supports field calibration updates. For flyback, LLC, or boost PFC stages needing only a modest pin count, this DSC replaces discrete analog control at lower BOM cost with programmable protection thresholds.
Recommended
Industrial Automation Nodes
In factory automation, the DSPIC33FJ32MC101-I/P serves as a compact actuator or sensor node controller. Peripheral Pin Select maps UART or SPI to whichever RPn pins the backplane connector uses, easing multi-drop wiring, and the CTMU provides capacitive touch inputs for panel interfaces without extra ICs. The industrial -40C to +85C grade survives cabinet and machine-mount environments. With 16 MIPS and hardware multiply, the part performs local filtering and scaling on analog sensor channels before transmitting over RS-485 (via external transceiver). Its 32KB Flash stores protocol stacks and lookup tables, while ICSP enables in-system firmware updates without removing the through-hole device from the board.
Recommended
Electronic Lighting Ballasts
Fluorescent and HID electronic ballast designs benefit from the DSPIC33FJ32MC101-I/P's combination of MCPWM outputs and analog comparators for half-bridge resonant switching. The DSC sweeps the PWM frequency through the lamp ignition profile and then regulates to a target operating point, replacing custom analog ballast control ICs with programmable logic. The 16-bit core executes lamp fault detection (open/short, end-of-life) within each switching period, and low-power sleep modes cut standby consumption to meet energy regulations. The 20-pin PDIP suits the small control sections of ballast boards, and the -40C to +85C range covers luminaire internal temperatures when the part is mounted away from the lamp housing.
Recommended
Embedded Prototyping and Education
The 20-pin PDIP package makes the DSPIC33FJ32MC101-I/P a favorite for breadboard prototyping and university embedded-systems courses. It plugs into a standard 0.3-inch DIP socket or breadboard, programs through a low-cost PICkit-style ICSP tool using just MCLR, PGD, PGC, and power, and debugs in-circuit with MPLAB X. Students exercise the 16-bit DSP instruction set, PPS pin remapping, MCPWM, and CTMU peripherals on one low-cost device. Compared with surface-mount dsPIC33 variants, the PDIP eliminates adapter boards, and its identical firmware compatibility with SS/SO packaged siblings means prototype code ports directly to production footprints without modification, shortening the path from coursework or lab bench to manufacturable hardware.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32MC101-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32MC101-E/P | DSPIC33FJ32GP101-I/P | DSPIC33FJ16MC101-E/P | DSPIC33FJ16MC101-I/P |
|---|---|---|---|---|---|
| Package | 20-PDIP | 20-PDIP - same | 20-PDIP - same | 20-PDIP - same | 20-PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB (11K x 24) | 32 KB | 32 KB | 16 KB | 16 KB |
| RAM | 2 KB | 2 KB | 2 KB | 1 KB | 1 KB |
| Performance | 16 MIPS @ 32 MHz | 16 MIPS @ 32 MHz | 16 MIPS @ 32 MHz | 16 MIPS @ 32 MHz | 16 MIPS @ 32 MHz |
| Operating Temperature | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) |
| Motor Control PWM (MCPWM) | Yes (MC family) | Yes | No - output compare (GP family) | Yes | Yes |
| 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
- Dedicated motor control PWM with dead-time insertion (vs DSPIC33FJ32GP101-I/P)
- Extended temperature option without redesign (vs DSPIC33FJ32MC101-E/P)
- Cost optimization path with 16KB sibling (vs DSPIC33FJ16MC101-I/P)
Design Notes
Decouple VDD with at least one 0.1uF ceramic capacitor placed within 5 mm of pins 9 and 20, plus a 4.7uF-10uF bulk capacitor near the device. Pin 17 (VCAP/VDDCORE) must connect to a low-ESR ceramic capacitor (typically 10uF per datasheet 70000652f) to VSS - this stabilizes the internal 1.8V-class core regulator. Never drive VCAP from an external supply; wrong capacitance or high ESR here causes brown-out resets that are hard to diagnose.
Per the datasheet, the exposed metal pad at the bottom of the PDIP package is not connected to any pin and is recommended to be connected to VSS externally - do not assume it is isolated when mounting over a ground plane or in a socket with a metal backing. Also configure Configuration bits for the oscillator source at program time: the default FRC oscillator runs the device well below the 32 MHz maximum unless PLL settings are set correctly in FOSC config words.
Use the Peripheral Pin Select (PPS) feature during layout optimization: route PWM, UART, and SPI to whichever RPn pins give shortest traces to the gate driver or transceiver, then lock the mapping in firmware. Keep the analog pins 2-5 (AN0-AN3) away from PWM switching nodes; add a local 0.1uF filter capacitor on VREF+ when ADC accuracy matters. Include the 5-pin ICSP header (MCLR, VDD, GND, PGD, PGC) in every production board for field updates.
Estimated: at 32 MHz with all peripherals active, typical operating current is in the tens of milliamps range (verify exact Idd figure in the datasheet electrical characteristics table). Power dissipation is roughly P = 3.3 V x Idd, i.e., on the order of 0.1 W, far below the PDIP thermal capability, so no heatsink or copper-pour thermal design is needed for the controller itself in standard motor-control applications.
Compliance Information
RoHS-compliant per distributor listings; exact REACH/halogen statements should be confirmed via the Microchip product page environmental data export.
