PIC24HJ32GP302T-I/SO - 16-bit 40 MIPS MCU, 32KB Flash | Microchip
MPN: PIC24HJ32GP302T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.91 | $49.10 |
| 100 | $4.07 | $407.00 |
| 500 | $3.42 | $1,710.00 |
| 1,000 | $2.98 | $2,980.00 |
PIC24HJ32GP302T-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O. The 16-bit class sits between 8-bit MCUs and 32-bit MCUs in the embedded hierarchy: 16-bit MCU -> microcontroller -> embedded processor -> semiconductor. PIC24H parts use a modified Harvard architecture with a 16-bit datapath, 24-bit instruction word, and a 16 x 16 hardware multiplier that completes a multiply in one cycle - giving the 40 MIPS figure.
Key differentiating features include 21 remappable I/O pins (5V-tolerant with selectable open-drain and internal pull-ups), three 16-bit timers that can be paired into one 32-bit timer, two output compare modules, an input capture module, a 12-bit ADC with up to 10 channels (the JLCPCB listing references both 10-bit and 12-bit ADC modes - the PIC24HJ32GP302 is 12-bit ADC with 1 MSPS, while the PIC24HJ32GP304 variant is 10-bit), and two UART/SPI/I2C modules plus a 40 MHz device tree. The 'T' suffix denotes tape-and-reel packaging for high-volume assembly, and the 'I' grade gives industrial -40C to +85C operation.
The PIC24H core uses a 5-stage pipeline with single-cycle instruction execution except for program-flow changes. DMA is supported (8-channel) and the device is pin-compatible with the dsPIC33F family of digital signal controllers, allowing designers to migrate to DSP performance without PCB rework when higher compute density is needed.
Typical applications include industrial control loops, motor control (BLDC/PMSM sensorless FOC using dsPIC33F migration path), sensor conditioning front-ends, USB/serial human-machine interfaces, and general-purpose embedded control. Designers select this part when they need more performance than a PIC16 or PIC18 8-bit MCU but less than the 32-bit PIC32 class.
When designing with this MCU, ensure the 3.0V to 3.6V supply is decoupled with a 10uF + 0.1uF pair at VDD/AVDD pins. Note that the SOIC-28 package exposes 21 GPIO but the die has more peripheral channels - use Peripheral Pin Select (PPS) to map functions to physical pins. Migration from PIC24HJ32GP202 (no PPS, 20 pins fewer) requires remapping, but migration to PIC24HJ32GP304 changes the ADC to 10-bit - verify before substituting.
Drop-in alternatives for PIC24HJ32GP302T-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 PIC24HJ32GP302T-I/SO (same form factor and footprint) — differing in ADC, Package, Timers, Program Memory (Flash), I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24HJ32GP302-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24HJ32GP302-E/SO
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC24HJ32GP302-H/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24HJ128GP502-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$7.45 / Unit
View Datasheet →dsPIC33FJ32GP302-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FV32KA302-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.14 / Unit
View Datasheet →PIC24HJ32GP302T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24H 16-bit RISC |
| Program Memory (Flash) | 32 KB (11K x 24 instructions) |
| Data RAM | 4 KB |
| Maximum CPU Speed | 40 MIPS at 40 MHz |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| I/O Pins | 21 (5V-tolerant, software-remappable via PPS) |
| ADC | 12-bit, 1 MSPS, up to 10 channels |
| Timers | 3 x 16-bit (pairable into 1 x 32-bit) |
| Output Compare / Input Capture | 2 Output Compare, 1 Input Capture |
| Communication Peripherals | 2 x UART/SPI/I2C |
| DMA | 8 channels |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | SOIC-28 (300 mil) |
| Mounting Type | Surface Mount |
| Pin/Package Compatibility | Pin-compatible with dsPIC33FJ32GP302 |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
| Programming Interface | ICSP via PGECx/PGEDx pins |
PIC24HJ32GP302T-I/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0 — Port A bit 0 / AN0 / VREF+ |
| Pin 3 | RA1 — Port A bit 1 / AN1 / VREF- |
| Pin 4 | RB0 — Port B bit 0 / AN2 / PGED1 |
| Pin 5 | RB1 — Port B bit 1 / AN3 / PGEC1 |
| Pin 6 | RB2 — Port B bit 2 / AN4 |
| Pin 7 | RB3 — Port B bit 3 / AN5 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA2 — Port A bit 2 / AN6 / CVREF- |
| Pin 10 | RA3 — Port A bit 3 / AN7 / CVREF+ |
| Pin 11 | RB4 — Port B bit 4 / AN8 |
| Pin 12 | RB5 — Port B bit 5 / AN9 / PGED2 |
| Pin 13 | RB6 — Port B bit 6 / AN10 / PGEC2 |
| Pin 14 | RB7 — Port B bit 7 / AN11 |
| Pin 15 | VSS — Ground reference |
| Pin 16 | VDD — Positive supply voltage 3.0-3.6V |
| Pin 17 | RA4 — Port A bit 4 / TCK |
| Pin 18 | RA5 — Port A bit 5 / TMS |
| Pin 19 | RA6 — Port A bit 6 |
| Pin 20 | RA7 — Port A bit 7 |
| Pin 21 | RC0 — Port C bit 0 |
| Pin 22 | RC1 — Port C bit 1 |
| Pin 23 | RC2 — Port C bit 2 |
| Pin 24 | RC3 — Port C bit 3 |
| Pin 25 | RC4 — Port C bit 4 |
| Pin 26 | RC5 — Port C bit 5 |
| Pin 27 | RC6 — Port C bit 6 |
| Pin 28 | RC7 — Port C bit 7 |
Typical Applications
PIC24HJ32GP302T-I/SO is suitable for 7 applications: Industrial Motor Control, Sensor Signal Conditioning Front-End, Human-Machine Interface (HMI) Controllers, Solar Inverter Control Loops, Automotive Body Electronics, Power Supply Digital Control & Telemetry, Portable Medical Device Controllers.
Industrial Motor Control
The PIC24HJ32GP302T-I/SO is well suited to BLDC and PMSM motor control in industrial drives thanks to its 40 MIPS performance, three 16-bit timers pairable into one 32-bit timer for high-resolution PWM, two output-compare channels, and 1 MSPS 12-bit ADC for back-EMF sensing. The 40 MIPS CPU sustains 10-20 kHz torque control loops without DSP acceleration, while the 21 remappable GPIO via PPS allow flexible PCB routing of H-bridge gate signals. For sensorless FOC requiring single-cycle MAC operations, designers can migrate to the pin-compatible dsPIC33FJ32GP302 without PCB rework.
Recommended
Sensor Signal Conditioning Front-End
The PIC24HJ32GP302T-I/SO fits sensor front-end designs where its 12-bit 1 MSPS ADC with up to 10 input channels provides adequate dynamic range for strain-gauge, thermocouple, and load-cell measurements. The 8-channel DMA controller streams ADC conversions into RAM at full sampling rate without CPU intervention, freeing 40 MIPS of processing for digital filtering and linearization. The 5V-tolerant GPIO simplifies interface to legacy 5V sensor bridges, while the 32 KB Flash accommodates calibration tables and lookup curves for sensor linearization.
Recommended
Human-Machine Interface (HMI) Controllers
The PIC24HJ32GP302T-I/SO handles HMI controller duties in industrial panels and operator interfaces, where its 40 MIPS throughput drives UART or SPI-connected displays while the two UART modules support simultaneous RS-485 Modbus and debug UART. The 21 remappable GPIO connect directly to keypads, LEDs, and rotary encoders without external logic, and 32 KB Flash stores multi-language menu state machines. Industrial -40C to +85C operation suits factory-floor enclosures.
Recommended
Solar Inverter Control Loops
The PIC24HJ32GP302T-I/SO's 40 MIPS performance is sufficient for MPPT and inverter control loops at 16-32 kHz switching frequencies, while its 12-bit ADC samples PV string voltage and current at 1 MSPS to track rapid irradiance changes. The 32 KB Flash stores MPPT algorithm state, grid-tie phase-lock constants, and anti-islanding protection logic. The 8-channel DMA streams ADC samples into RAM, allowing the CPU to run full MPPT sweep every few milliseconds without missing peak power points.
Recommended
Automotive Body Electronics
The PIC24HJ32GP302T-I/SO's industrial -40C to +85C rating suits non-powertrain automotive body applications such as HVAC flap control, seat-position memory, mirror actuators, and lighting controllers. The 21 GPIO drive H-bridges and relays directly via MOSFET drivers, while the 40 MIPS CPU handles LIN-bus stack and CAN-routing logic alongside actuator control. For AEC-Q100 qualified builds, the pin-compatible PIC24HJ32GP302-H/SO variant is the drop-in replacement using the same SOIC-28 footprint and pinout.
Recommended
Power Supply Digital Control & Telemetry
The PIC24HJ32GP302T-I/SO enables digital control and telemetry in AC-DC and DC-DC power supplies, where its 40 MIPS CPU closes voltage-mode or peak-current-mode control loops at 50-100 kHz while the 12-bit ADC digitizes output voltage, current, and temperature for PMBus-style telemetry. The 32 KB Flash stores multi-mode firmware (CCM/DCM/burst-mode) and fault logs. The two UART/SPI/I2C modules allow simultaneous PMBus host communication and in-system firmware update via I2C.
Recommended
Portable Medical Device Controllers
The PIC24HJ32GP302T-I/SO fits portable medical device controllers where its 32 KB Flash accommodates IEC 62304 firmware lifecycle requirements and the 12-bit ADC digitizes sensor inputs from pulse oximeters, blood-pressure cuffs, and temperature probes. The 40 MIPS throughput runs filtering and trend-analysis algorithms in real time, while the 21 GPIO drive LCDs, keypads, and buzzer interfaces. The PIC24H 16-bit core provides deterministic interrupt latency required by medical safety standards, though for FDA Class III designs the AEC-Q100 grade variant is recommended.
Recommended
Recommended Products Summary
Engineering reference data for PIC24HJ32GP302T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24HJ32GP302-I/SO | PIC24HJ32GP302-E/SO | dsPIC33FJ32GP302-I/SO | PIC24HJ128GP502-I/SO | PIC24FV32KA302-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-28 (300 mil) | SOIC-28 (300 mil) - same | SOIC-28 (300 mil) - same | SOIC-28 (300 mil) - same | SOIC-28 (300 mil) - same | SOIC-28 (300 mil) - same |
| Core | PIC24H 16-bit, 40 MIPS | PIC24H 16-bit, 40 MIPS | PIC24H 16-bit, 40 MIPS | dsPIC33F 16-bit+DSP, 40 MIPS | PIC24H 16-bit, 40 MIPS | PIC24FV 16-bit, 32 MIPS |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 128 KB | 32 KB |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 8 KB | 2 KB |
| I/O Pins | 21 | 21 | 21 | 21 | 21 | 19 |
| 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 | 2.0 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| DSP Engine | No | No | No | Yes (single-cycle MAC) | No | No |
| Packaging Form | Tape & Reel | Tube | Tube | Tube | Tube | Tube |
Key Differentiators
- Tape-and-reel packaging optimized for high-volume SMT (vs PIC24HJ32GP302-I/SO)
- Pin-compatible DSP upgrade path without PCB rework (vs dsPIC33FJ32GP302-I/SO)
- Extended memory upgrade path in same footprint (vs PIC24HJ128GP502-I/SO)
- Wider supply-voltage tolerance for battery-powered systems (vs PIC24FV32KA302-I/SO)
Design Notes
Place a 10 uF bulk capacitor and a 0.1 uF ceramic decoupling capacitor within 5 mm of each VDD/AVDD pin pair. The PIC24HJ32GP302's 3.0V to 3.6V supply rail must remain above 3.0V under full load; voltage droops during ADC sampling can corrupt 12-bit conversion results. Tie VCAP pin 16 (on packages that expose it) to a 10 uF low-ESR capacitor to ground for internal core voltage regulator stability - failure to do so causes erratic behavior and ADC drift.
Use a continuous ground plane beneath the SOIC-28 footprint and route all VDD traces with minimum 0.2 mm width. Place the external crystal (4 MHz to 10 MHz fundamental mode) within 5 mm of the OSCI/OSCO pins with short symmetric traces and a guard ring tied to ground to prevent noise injection into the 40 MHz PLL. The ICSP programming pins (PGECx/PGEDx) must be accessible on the PCB for in-circuit programming - do not gate them behind a multiplexer unless firmware-controlled.
Do not assume a 32 KB Flash PIC24HJ32GP302 variant exists at every speed grade - the maximum 40 MIPS requires the PLL and a 3.0V minimum supply. Peripheral Pin Select (PPS) assignments must be configured at startup before the corresponding peripheral is enabled, or the GPIO mapping will not latch. The MCLR pin requires a 10 kohm pull-up to VDD; floating MCLR causes spurious resets during power-up. The ADC channel-to-pin mapping in this device is shared with comparator inputs - configure the AD1PCFG register before enabling ADC to avoid contention.
When using the 12-bit ADC at 1 MSPS, route analog traces perpendicular to digital traces and keep analog signals away from the 40 MHz OSCI clock trace. Add a 100 ohm ferrite bead or 10 ohm resistor in series with AVDD, fed from the digital VDD through a ferrite, to suppress digital switching noise from coupling into analog references. Use a star-ground topology with the AGND and DGND tied at a single point beneath the MCU to minimize ground-loop noise in ADC sampling.
At 40 MIPS the PIC24HJ32GP302's core dissipation in SOIC-28 is approximately 30-50 mW worst-case - well within the package's thermal envelope (theta_JA ~80 C/W for SOIC-28). However, sustained high GPIO switching current (e.g., 20 mA per pin on multiple outputs) can add 200-400 mW of dissipation; ensure total GPIO source/sink current stays within the device's maximum power-dissipation specification. No heatsink is required for typical industrial control use cases.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade only (-40C to +85C); for AEC-Q100 automotive applications use PIC24HJ32GP302-H/SO. Lead-free and halogen-free per Microchip material declaration.
