PIC24HJ32GP202-I/SO - 40 MIPS 16-bit MCU 32KB Flash | Microchip
MPN: PIC24HJ32GP202-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.4 | $340.00 |
| 500 | $3.05 | $1,525.00 |
| 1,000 | $2.72 | $2,720.00 |
PIC24HJ32GP202-I/SO Overview
A PIC24H 16-bit MCU is a modified-Harvard microcontroller that combines a 16-bit data path with a 24-bit instruction word and a DSP-enhanced instruction set, occupying the middle ground between 8-bit PIC MCUs and 32-bit ARM Cortex-M parts in Microchip's portfolio. It targets real-time control applications that need deterministic interrupt response, on-chip peripherals for motor and power conversion, and C-compiler-efficient addressing modes. The PIC24H family is pin-compatible with the dsPIC33F DSC family, which adds hardware MAC/DSP instructions on the same core for applications such as digital filtering and sensorless motor control.
Key features include 32 KB (11K x 24 words) of self-programmable Flash with ECC, 2 KB SRAM, 21 digital I/O pins, three 16-bit timers that can be paired to form a 32-bit timer, two output-capture modules, three 16-bit PWM channels, a 10-bit ADC, two UARTs, two SPI, and one I2C. The wide VDD range of 3.0 V to 3.6 V is supplied to the core while the I/O ring runs at the same rail, simplifying single-rail designs. Pin functions are remappable through Peripheral Pin Select (PPS), allowing flexible PCB routing.
Architecturally the device uses a 16-bit data path with a 24-bit instruction word and dual-bus Harvard structure that allows simultaneous data and program fetches, achieving up to 40 MIPS sustained throughput. The integrated DSP engine supports fractional arithmetic and signed multiplication, enabling sensorless motor-control algorithms and digital-filter kernels without external DSP components.
Typical applications include sensorless and sensored BLDC/PMSM motor drives, digital switch-mode power conversion (PFC, LLC, full-bridge), industrial sensor signal conditioning with on-chip ADC, building-automation fan/pump controllers, and HVAC compressor inverters. The 32 KB Flash and 2 KB SRAM budget suits mid-complexity state machines and control loops. An internal 8 MHz oscillator with PLL allows operation without an external crystal on cost-sensitive boards.
Designers should plan VDD decoupling with a 10 uF bulk and a 100 nF ceramic placed within 5 mm of the VDD/VSS pair, and use the internal PLL configuration bits carefully because switching from FRC to the PLL-derived clock without proper sequence can cause firmware lock-up. The device is drop-in compatible with other PIC24HJ32GP202 speed grades (-I/SP, -E/SP) within the same 28-pin SOIC footprint, but only when firmware timing margins permit the temperature-grade change.
This page synthesizes distributor stock data, drop-in replacement MPNs, and practical design notes that are not aggregated on a single manufacturer page.
Drop-in alternatives for PIC24HJ32GP202-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 PIC24HJ32GP202-I/SO (same form factor and footprint) — differing in Package, Core Architecture, ADC, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24HJ32GP202-H/SO
✅ Drop-In✓ In Stock
$4.12 / Unit
View Datasheet →PIC24HJ32GP202-E/MM
✅ Drop-In✓ In Stock
$3.6 / Unit
View Datasheet →dsPIC33FJ32GP202-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
dsPIC33FJ32GP202-H/SO
✅ Drop-In📋 Reference alternative (not in catalog)
dsPIC33FJ32GP202-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24HJ32GP204-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24HJ32GP202-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24H 16-bit modified Harvard with DSP |
| Instruction Word Size | 24-bit |
| Maximum CPU Speed | 40 MIPS at 40 MHz |
| Program Flash Memory | 32 KB (11K x 24 words) |
| RAM | 2 KB |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| Digital I/O Pins | 21 |
| Timers | Three 16-bit (pairable into one 32-bit) |
| Output Compare Modules | 2 |
| Input Capture Modules | 2 |
| PWM Channels | 3 x 16-bit |
| ADC | 10-bit, multi-channel (per datasheet) |
| Communication Peripherals | 2x UART, 2x SPI, 1x I2C |
| Operating Temperature | -40 to +85 C (industrial -I grade) |
| Package | 28-pin SOIC (SO, wide-body 0.300 inch) |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Lead-free per package marking |
PIC24HJ32GP202-I/SO 28-pin soic (so, wide-body 0.300 inch) Pin Configuration Guide
Pin configuration for PIC24HJ32GP202-I/SO (28-pin soic (so, wide-body 0.300 inch) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC24HJ32GP202-I/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC24HJ32GP202-I/SO is suitable for 6 applications: Sensorless BLDC / PMSM Motor Drive, Digital Switch-Mode Power Supply (SMPS) Control, Industrial Sensor Signal Conditioning, HVAC Compressor Inverter, Building Automation Fan/Pump Controller, Solar Micro-Inverter Power Conversion.
Sensorless BLDC / PMSM Motor Drive
The PIC24HJ32GP202-I/SO drives sensorless BLDC and PMSM motors in fans, pumps and small appliances. Its 40 MIPS throughput and 3 PWM channels handle six-step commutation at >20 kHz PWM switching with BEMF sensing on the ADC. The 32 KB Flash fits a complete sensorless trapezoidal or simple-FOC firmware, while 2 KB SRAM handles state variables and the control loop. Pair with Microchip MCP8024 BLDC gate driver and MCP6001 op-amp for BEMF feedback; field-tested for HVAC and appliance duty.
Recommended
Digital Switch-Mode Power Supply (SMPS) Control
The PIC24HJ32GP202-I/SO is well-suited for digital control of PFC, LLC, and full-bridge converters. Its 40 MIPS supports 50-100 kHz voltage-mode control loops with adaptive dead-time insertion, while three PWM channels drive synchronous rectifiers and the auxiliary PFC MOSFET. The 10-bit ADC samples primary current and VOUT for closed-loop regulation; pair with Microchip MCP1631 hv buck controller or HCPL-3120 gate driver IGBT bridge. Industrial 3.3 V supply integrates directly with 24 V/48 V telecom bus systems.
Recommended
Industrial Sensor Signal Conditioning
The PIC24HJ32GP202-I/SO conditions multi-channel analog sensor inputs in PLC, factory-automation, and process-control front ends. Its 10-bit ADC reads 4-20 mA loop current, RTD/thermocouple bridges, and bridge-pressure sensors; the dual UART serves Modbus RTU or RS-485 links, while the SPI connects to a downstream ADC for <0.1% measurement accuracy. The 32 KB Flash holds linearization tables and calibration constants; the -40C to +85C industrial rating suits outdoor and factory-floor ambient.
Recommended
HVAC Compressor Inverter
The PIC24HJ32GP202-I/SO is used in HVAC compressor and outdoor-unit inverter boards, where it drives a 3-phase IGBT bridge through three PWM channels and samples compressor phase current on the ADC. The 32 KB Flash holds sinusoidal-FOC code or v/Hz open-loop firmware for cost-sensitive residential systems. The wide -40C to +85 C industrial range handles the outdoor ambient of condenser enclosures, while the 28-pin SOIC footprint is drop-in to the sister PIC24HJ12GP202 for low-cost BOM variants.
Recommended
Building Automation Fan/Pump Controller
The PIC24HJ32GP202-I/SO controls BLDC fans and circulation pumps in building automation, with firmware for variable-speed control via 0-10 V analog or PWM input, on-board RTC scheduling, and Modbus RTU comms. The 2 KB SRAM and 32 KB Flash suit a complete protocol stack plus closed-loop PID; the SPI connects to ENC28J100D60 Ethernet for BACnet gateways. Industrial temperature grade is suitable for rooftop unit controllers where ambient reaches +70 C.
Recommended
Solar Micro-Inverter Power Conversion
The PIC24HJ32GP202-I/SO runs MPPT and grid-tie control on small solar micro-inverters up to 300 W. Its 40 MIPS sustains a 100 kHz control loop with on-the-fly MPPT step adjustments; the 10-bit ADC reads panel voltage, current and grid zero-cross. The 32 KB Flash fits perturb-and-observe MPPT, anti-islanding, and a basic 50/60 Hz phase-lock loop. Industrial -40C to +85C range survives outdoor cabinet mounting; pair with Microchip MCP16331 hv buck for the DC-DC stage and an H-bridge IGBT module.
Recommended
Recommended Products Summary
Engineering reference data for PIC24HJ32GP202-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24HJ32GP202-H/SO | PIC24HJ32GP202-E/MM | dsPIC33FJ32GP202-I/SO | dsPIC33FJ32GP202-H/SO | dsPIC33FJ32GP202-E/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SOIC | 28-pin SOIC | 28-pin QFN (MM) | 28-pin SOIC | 28-pin SOIC | 28-pin SOIC |
| Core | PIC24H 16-bit | PIC24H 16-bit | PIC24H 16-bit | dsPIC33F 16-bit DSP | dsPIC33F 16-bit DSP | dsPIC33F 16-bit DSP |
| DSP Engine | No | No | No | Yes (MAC + fractional) | Yes (MAC + fractional) | Yes (MAC + fractional) |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| CPU Speed | 40 MIPS at 40 MHz | 40 MIPS at 40 MHz | 40 MIPS at 40 MHz | 40 MIPS at 40 MHz | 40 MIPS at 40 MHz | 40 MIPS at 40 MHz |
| 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 | 3.0 V to 3.6 V |
| Temperature Grade | Industrial -40C to +85C (-I) | Commercial 0C to +70C (-H) | Extended -40C to +125C (-E) | Industrial -40C to +85C (-I) | Commercial 0C to +70C (-H) | Extended -40C to +125C (-E) |
Key Differentiators
- Pin-compatible upgrade path to dsPIC33F DSP (vs dsPIC33FJ32GP202-I/SO)
- Industrial temperature grade with extended upper spec (vs PIC24HJ32GP202-H/SO)
- Highest Flash density in the 28-pin SOIC GP202 family (vs PIC24HJ12GP202-I/SS)
Design Notes
Decouple the VDD rail with a 10 uF X5R/X7R bulk ceramic placed within 5 mm of the VDD pin pair and a 100 nF X7R ceramic adjacent to each VDD-VSS pair on the package. PIC24H parts draw brief inrush transients on PLL lock; a bulk capacitor prevents VDD droop that can reset the part. Per Microchip reference design, AVdd and AVss (if exposed) need a 100 nF + 10 uF pair separate from digital VDD to avoid ADC reference noise injection.
Route the 40 MHz system clock trace away from analog ADC inputs to avoid digital coupling. Place the quartz load capacitors within 2 mm of the OSC1/OSC2 pair and guard the 32 kHz secondary oscillator traces with a ground ring. Use a 4-layer PCB with continuous ground plane under the MCU; the 28-pin SOIC package has better thermal dissipation than QFN on 2-layer boards but worse than QFN on 4-layer.
When switching the system clock from FRC to the PLL-derived clock, follow the unlock sequence in the OSCCON register (OSWEN bit). Skipping the sequence or using an unstable oscillator source can lock the firmware. Use IEC60730 Class B diagnostic libraries if targeting household appliance safety. The PPS peripheral pin select feature on PIC24H can be misconfigured at startup, leaving remappable peripherals inactive - verify PPS registers in a separate init routine.
Compliance Information
Lead-free and RoHS compliant per Microchip product page. The PIC24HJ32GP202-I/SO is not AEC-Q100 qualified; for automotive applications refer to AEC-Q100-qualified PIC24HJ variants in the dsPIC33F family. Conflict minerals statement per Microchip corporate policy.
