DSPIC33FJ128MC202-I/MM - 16-bit DSC 40 MIPS QFN-28 | Microchip
MPN: DSPIC33FJ128MC202-I/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.63 | $5.63 |
| 10 | $5.1 | $51.00 |
| 100 | $4.36 | $436.00 |
| 500 | $3.98 | $1,990.00 |
| 1,000 | $3.55 | $3,550.00 |
DSPIC33FJ128MC202-I/MM Overview
A Digital Signal Controller combines the deterministic interrupt handling and low-cost peripheral set of a microcontroller with the mathematical throughput of a DSP. In the power-management hierarchy of embedded systems, the DSC sits between general-purpose MCUs (such as the PIC18 family) and dedicated DSPs, making the dsPIC33F family a natural fit for closed-loop control systems that require fast, repetitive multiply-accumulate computation alongside real-time I/O.
Key features include the 16-bit modified Harvard architecture executing C-friendly instructions at up to 40 MIPS, motor-control PWM peripherals with complementary outputs and dead-time insertion, and an advanced analog block of 10-bit ADC channels multiplexed across AN0-AN7, plus external VREF+ and VREF- inputs. DMA support offloads data movement, and the device is pin compatible with the PIC24H family, enabling seamless migration.
Technically, the dsPIC33F core operates from 3.0 V to 3.6 V (nominal 3.3 V) and provides DSP-style multiply-accumulate (MAC) instructions, dual operand fetch, and 40-bit wide accumulators. Remappable peripheral pins (RPx) let engineers route UART, SPI, I2C, and PWM signals to flexible locations on the 21-I/O pad ring, dramatically simplifying PCB routing in the compact 6 x 6 mm QFN footprint.
Typical applications include brushless DC and PMSM motor control drives, digital power supplies and power-factor-correction converters, and sensor signal-processing nodes in industrial automation. The motor-control PWM and fast ADC sampling make it especially suited for current-loop control at switching frequencies in the tens of kilohertz.
Design consideration: the -I suffix denotes an industrial temperature rating of -40C to +85C; for -40C to +125C operation select the -E variant instead, and always decouple both VDD pins with low-ESR ceramics placed directly at the QFN pads.
This page synthesizes distributor availability data, drop-in alternatives within the dsPIC33F and PIC24H families, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ128MC202-I/MM — 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 DSPIC33FJ128MC202-I/MM (same form factor and footprint) — differing in Operating Temperature, Package, ADC, Maximum CPU Speed, Core Architecture.
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No drop-in alternatives available for this product.
Request AlternativesDSPIC33FJ128MC202-I/MM Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit modified Harvard RISC (dsPIC33F) |
| Maximum CPU Speed | 40 MIPS |
| Program Memory | 128 KB (128K x 8) Flash |
| SRAM | 16 KB |
| Supply Voltage | 3.0 V to 3.6 V (nominal 3.3 V) |
| Digital Signal Controller | Yes (DSP MAC instruction set) |
| Package | 28-QFN-S, 6 x 6 mm (MM) |
| I/O Count | 21 |
| ADC | 10-bit, channels AN0-AN7, VREF+/VREF- support |
| PWM | Motor Control PWM with complementary outputs and dead-time |
| DMA | Yes |
| Remappable Pins | RPx peripheral pin select |
| Operating Temperature | -40C to +85C (industrial, -I suffix) |
| Mounting Type | Surface Mount |
| Family Compatibility | Pin compatible with PIC24H family |
| RoHS Status | Compliant |
DSPIC33FJ128MC202-I/MM Pin Configuration
| Pin 1 | MCLR — Master clear reset input / programming voltage |
| Pin 2 | RB0/AN0/VREF+ — I/O, ADC channel 0, positive voltage reference |
| Pin 3 | RB1/AN1/VREF- — I/O, ADC channel 1, negative voltage reference |
| Pin 4 | RB2/AN2/SS1 — I/O, ADC channel 2, SPI slave select 1 |
| Pin 5 | RB3/AN3/INDX — I/O, ADC channel 3, encoder index input |
| Pin 6 | RB4/AN4/QEA — I/O, ADC channel 4, quadrature encoder phase A |
| Pin 7 | VDD — Positive supply (3.0 V to 3.6 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA2/OSC1/CLKI — I/O, crystal oscillator input / external clock input |
| Pin 10 | RA3/OSC2/CLKO — I/O, crystal oscillator output / clock output, EC mode I/O |
| Pin 11 | RB5/AN5/QEB — I/O, ADC channel 5, quadrature encoder phase B |
| Pin 12 | RB6/AN6/OCFA — I/O, ADC channel 6, PWM fault A input |
| Pin 13 | RB7/AN7/UPDN — I/O, ADC channel 7, quadrature up/down control |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RC13/SOSCI/T2CK — I/O, secondary oscillator input, Timer2 external clock |
| Pin 16 | RC14/SOSCO/T1CK — I/O, secondary oscillator output, Timer1 external clock |
| Pin 17 | VDD — Positive supply (3.0 V to 3.6 V) |
| Pin 18 | RF2/RP2 — Remappable I/O (peripheral pin select, e.g. U1RX/SDI1) |
| Pin 19 | RF3/RP3 — Remappable I/O (peripheral pin select, e.g. U1TX/SDO1) |
| Pin 20 | RD0/RP4 — Remappable I/O (PWM/peripheral functions) |
| Pin 21 | RD1/RP5 — Remappable I/O (PWM/peripheral functions) |
| Pin 22 | RD2/RP6 — Remappable I/O (PWM/peripheral functions) |
| Pin 23 | RD3/RP7 — Remappable I/O (PWM/peripheral functions) |
| Pin 24 | RD4/RP8 — Remappable I/O (PWM/peripheral functions) |
| Pin 25 | RD5/RP9 — Remappable I/O (PWM/peripheral functions) |
| Pin 26 | RD6/RP10 — Remappable I/O (PWM/peripheral functions) |
| Pin 27 | RD7/RP11 — Remappable I/O (PWM/peripheral functions) |
| Pin 28 | RD8/RP12 — Remappable I/O (PWM/peripheral functions) |
Typical Applications
DSPIC33FJ128MC202-I/MM is suitable for 6 applications: BLDC/PMSM Motor Control Drives, Digital Power Supplies and PFC Converters, Industrial Automation Sensor Nodes, Embedded Audio and Signal Processing, Lighting and Electronic Ballasts, Automotive Auxiliary Control Units (Extended Temp Variant).
BLDC/PMSM Motor Control Drives
The DSPIC33FJ128MC202-I/MM is a natural fit for brushless DC and permanent-magnet synchronous motor drives because its Motor Control PWM module generates complementary output pairs with programmable dead-time insertion, which is essential for driving half-bridge gates without shoot-through. Its 10-bit ADC channels (AN0-AN7) sample shunt-resistor phase currents fast enough for field-oriented control inner loops, while the 40 MIPS core with DSP MAC instructions executes Park/Clarke transforms and PI current controllers in deterministic interrupt windows. Typical usage places the DSC between gate-driver ICs and current-sense amplifiers; the remappable RPx pins let PWM outputs, UART diagnostics, and SPI encoder interfaces be routed to convenient QFN pads. The 16 KB SRAM holds state observers and ramp tables, and DMA offloads ADC results, keeping interrupt latency low. The -40C to +85C industrial rating covers most drive environments.
Recommended
Digital Power Supplies and PFC Converters
Digital switch-mode power supplies and power-factor-correction stages need deterministic, high-rate control loops, and the DSPIC33FJ128MC202-I/MM delivers with its 40 MIPS modified Harvard core and DSP multiply-accumulate instructions that compute compensation filters in a few microseconds. The 10-bit ADC can trigger from the PWM module to sample output voltage and inductor current at precisely timed points in each switching cycle, minimizing ripple-induced sampling error, and the motor-control PWM provides the complementary outputs and dead-time control needed for synchronous buck or boost topologies. DMA moves conversion results to RAM without CPU intervention. Designers typically run voltage-mode or average-current-mode loops at switching frequencies in the tens to hundreds of kilohertz; the 3.0 V to 3.6 V supply and 21 remappable I/O in the 6 x 6 mm QFN-S footprint keep the controller area compact on dense power PCBs.
Recommended
Industrial Automation Sensor Nodes
In factory automation, the DSPIC33FJ128MC202-I/MM serves as a smart sensor node controller combining signal processing with field connectivity. Its 10-bit ADC and on-chip analog support digitize bridge, thermistor, or current-loop sensors, while DSP MAC instructions apply digital filtering (IIR/FIR) that rejects line noise and improves measurement resolution beyond raw ADC capability. The remappable RPx pins provide UART, SPI, and I2C routing freedom so designers can place an RS-485 transceiver, EEPROM, and CAN interface wherever the PCB layout demands rather than where fixed pins dictate. With 128 KB Flash there is room for protocol stacks plus calibration and diagnostics code, and the 16 KB SRAM buffers burst data before transmission. The industrial -40C to +85C rating and surface-mount 28-QFN-S package suit DIN-rail and machine-mounted electronics that must tolerate vibration and temperature swings.
Recommended
Embedded Audio and Signal Processing
The DSP core of the DSPIC33FJ128MC202-I/MM with 40-bit wide accumulators and single-cycle MAC instructions makes it a cost-effective engine for embedded audio preprocessing and control: active crossovers, limiter/compressor functions, and closed-loop class-D amplifier modulation. Audio samples arriving via SPI from an external codec are processed by FIR/IIR filters whose accumulators avoid overflow in long filter chains, and the motor-control PWM can be repurposed to generate high-frequency power-stage switching signals for digital amplifiers. The 128 KB Flash stores coefficient tables, multiple tuning presets, and firmware update code, while 16 KB SRAM provides delay-line memory for room-correction algorithms within small-room path lengths. Designers typically pair the DSC with an I2S/SPI audio codec; the remappable RPx pins simplify codec clocking and data routing in the compact 6 x 6 mm QFN-S layout.
Recommended
Lighting and Electronic Ballasts
High-intensity discharge and LED ballast controllers benefit from the DSPIC33FJ128MC202-I/MM combination of a motor-control PWM module, fast ADC feedback, and low-cost 16-bit processing. The PWM module produces the resonant half-bridge drive with programmable dead-time, while the ADC monitors lamp current and bus voltage each cycle to implement closed-loop power regulation and strike/restart sequences. DSP instructions run the control compensators and fault-detection routines at 40 MIPS, supporting switching frequencies well into the hundreds of kilohertz range where ballast magnetics stay small. Remappable RPx pins allow DALI or UART dimming interfaces to be placed on any convenient pad of the 6 x 6 mm QFN-S, and the 128 KB Flash accommodates multiple lamp-type profiles in one firmware image. The -40C to +85C industrial temperature rating suits outdoor and enclosed luminaire environments where self-heating is significant.
Recommended
Automotive Auxiliary Control Units (Extended Temp Variant)
Although the -I/MM grade is rated -40C to +85C, the same footprint in the -E/MM extended variant (also on this page as a drop-in alternative) extends to +125C, making the dsPIC33FJ128MC202 architecture applicable to underhood auxiliary units: fuel-pump controllers, cooling-fan drives, throttle actuators, and electric water pumps. These systems reuse the identical motor-control PWM with dead-time insertion for three-phase or H-bridge stages and the 10-bit ADC for position and current feedback, exactly as in industrial drives. On non-critical in-cabin nodes, the -I/MM grade is sufficient and lowers cost. The remappable RPx I/O accommodates LIN/CAN transceivers and diagnostic UARTs anywhere on the 28-QFN-S pad ring, and 128 KB Flash retains space for OBD-style diagnostics. Teams can develop with the -I/MM and drop the -E/MM onto the same PCB for high-temperature zones with zero layout change.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128MC202-I/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128MC202-E/MM | DSPIC33FJ128MC202-H/MM | DSPIC33FJ64MC202-I/MM | DSPIC33FJ32MC202-I/MM | PIC24HJ128GP202-I/MM | DSPIC33FJ06GS202-I/MM |
|---|---|---|---|---|---|---|---|
| Package | 28-QFN-S (6 x 6 mm, MM) | 28-QFN-S (6 x 6 mm) - same | 28-QFN-S (6 x 6 mm) - same | 28-QFN-S (6 x 6 mm) - same | 28-QFN-S (6 x 6 mm) - same | 28-QFN-S (6 x 6 mm) - same | 28-QFN-S (6 x 6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 128 KB | 64 KB | 32 KB | 128 KB | 6 KB |
| Operating Temperature | -40C to +85C (-I) | -40C to +125C (-E) | Lower temp grade (-H) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Motor Control PWM | Yes (complementary outputs, dead-time) | Yes | Yes | Yes | Yes | Standard output-compare (no MC PWM emphasis) | Yes (digital-power PWM family) |
| Core Type | dsPIC33F 16-bit DSC (DSP MAC) | dsPIC33F DSC | dsPIC33F DSC | dsPIC33F DSC | dsPIC33F DSC | PIC24H 16-bit MCU | dsPIC33F DSC (GS digital-power) |
| Pin Compatibility | Reference | Pin-to-pin, same die | Pin-to-pin | Pin-to-pin | Pin-to-pin | Pin compatible per Microchip (PIC24H family) | Same footprint, verify pin multiplexing |
Key Differentiators
- Extended-temperature drop-in option in the same footprint (vs DSPIC33FJ128MC202-E/MM)
- Full 128 KB Flash at maximum memory in the MC202 subfamily (vs DSPIC33FJ64MC202-I/MM)
- Dedicated motor-control PWM versus general-purpose MCU (vs PIC24HJ128GP202-I/MM)
Design Notes
The DSPIC33FJ128MC202-I/MM requires a tightly regulated 3.0 V to 3.6 V rail. Decouple both VDD pins (pins 7 and 17) with a 0.1 uF ceramic placed within 2 mm of each pad, plus one bulk 10 uF per device. Note that pins 7 and 17 are on opposite sides of the QFN - route a local copper pour under the exposed pad rather than long traces. VDDCore regulation is internal on this family; do not add external components to core pins. A drop above 3.6 V or brownout below 3.0 V can corrupt Flash writes, so enable the on-chip brown-out detector and low-voltage detect interrupts.
For the 6 x 6 mm QFN-S (MM) footprint, solder the center exposed pad to a grounded copper island with an array of thermal vias - this improves both grounding integrity and heat extraction. Keep the analog AN0-AN7 traces short and routed away from motor-control PWM lines; PWM switching edges couple tens of millivolts into long analog runs. Because peripheral pin select (RPx) lets you remap UART/SPI/PWM functions, assign peripherals to pads that minimize crossovers during layout instead of fixing pin assignments before routing.
Three common mistakes with this part: (1) choosing the -I grade for an environment where self-heating pushes junction temperature beyond the +85C rating - switch to the DSPIC33FJ128MC202-E/MM (-40C to +125C) which is the same footprint; (2) assuming MCLR pin 1 can be left floating - it needs a pull-up (typically 10K) for reliable reset and in-circuit programming; (3) forgetting the secondary oscillator pins 15/16 (SOSCI/SOSCO) if using the RTCC - configure them deliberately. Also verify code fits smaller-Flash siblings (64 KB/32 KB) before cost-reducing to DSPIC33FJ64MC202-I/MM.
Compliance Information
RoHS compliance per standard Microchip -I grade product data; explicit REACH/halogen statements not present in provided data and are therefore marked unknown.
