PIC24HJ32GP304-I/PT - 16-bit 40MHz 32KB Flash MCU | Microchip
MPN: PIC24HJ32GP304-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.42 | $7.42 |
| 10 | $6.68 | $66.80 |
| 100 | $5.95 | $595.00 |
| 500 | $5.21 | $2,605.00 |
| 1,000 | $4.49 | $4,490.00 |
PIC24HJ32GP304-I/PT Overview
A 16-bit microcontroller is a single-chip computer that processes data 16 bits at a time, sitting in the hierarchy between 8-bit MCUs and 32-bit ARM-class cores. The PIC24H architecture is a 16-bit modified Harvard RISC design with a 16-bit data path and 24-bit instruction word, optimized for deterministic real-time control. Within the broader taxonomy, PIC24H belongs to the 16-bit MCU tier of the microcontroller semiconductor category.
Key features include hardware DMA that offloads data movement from the CPU, a 12-bit ADC with 500 ksps throughput, dual analog comparators, and a charge time measurement unit (CTMU) for capacitive touch or accurate timing. Communication peripherals cover UART, SPI, I2C, and ECAN, providing flexibility for both sensor interfaces and industrial fieldbus integration. The CTMU and DMA pair especially well for low-jitter sensor sampling.
Typical applications include industrial automation, motor control (BLDC, PMSM, and stepper), intelligent sensor systems, building automation HVAC controllers, and digital power conversion control loops. The wide peripheral set and DMA engine allow the CPU to focus on control-loop math rather than data shuffling.
When designing with the PIC24HJ32GP304-I/PT, ensure that the 3.3 V rail is well-regulated and that decoupling capacitors sit close to the VDD/VSS pairs. Use the ECAN module for CAN-bus nodes, the CTMU for capacitive touch sensing, and the DMA controller for high-throughput ADC-to-memory transfers.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical design guidance not found in the manufacturer datasheet, providing a compact, citation-ready reference for engineering selection.
Drop-in alternatives for PIC24HJ32GP304-I/PT — 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 PIC24HJ32GP304-I/PT (same form factor and footprint) — differing in Timers, Package, ADC, Program Memory (Flash), Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24HJ32GP304T-I/PT
✅ Drop-In✓ In Stock
$4.32 / Unit
View Datasheet →PIC24HJ32GP304-I/ML
✅ Drop-In✓ In Stock
$2.74 / Unit
View Datasheet →PIC24HJ128GP504-I/PT
✅ Drop-In✓ In Stock
$5.07 / Unit
View Datasheet →PIC24HJ128GP504T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.49 / Unit
View Datasheet →PIC24HJ256GP206AT-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.1 / Unit
View Datasheet →PIC24HJ32GP304-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit PIC24H (modified Harvard RISC) |
| Program Memory (Flash) | 32 KB (11K x 24) |
| Data Memory (RAM) | 4 KB |
| Maximum CPU Speed | 40 MIPS at 40 MHz |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 44-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Digital I/O Pins | 21 |
| ADC | 12-bit, up to 16 channels, 500 ksps |
| Timers | Three 16-bit (pairable to one 32-bit) |
| Output Compare Modules | 2 |
| DMA Channels | 8 |
| Communication Peripherals | UART, SPI, I2C, ECAN |
| Analog Comparators | 2 |
| CTMU | Yes (Charge Time Measurement Unit) |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
PIC24HJ32GP304-I/PT Pin Configuration
| Pin 1 | RP15/CN15V15/PMD15 — Remappable I/O / Change Notification / Enhanced PWM |
| Pin 2 | RP14/CN14V14/PMD14 — Remappable I/O / Change Notification / Enhanced PWM |
| Pin 3 | RP13/PA15 — Remappable I/O / Port A |
| Pin 4 | RP12/PA14 — Remappable I/O / Port A |
| Pin 5 | RP11/PA13 — Remappable I/O / Port A |
| Pin 6 | RP10/PA12 — Remappable I/O / Port A |
| Pin 7 | MCLR — Master Clear (reset, active-low) |
| Pin 8 | RP9/PA11 — Remappable I/O / Port A |
| Pin 9 | RP8/PA10 — Remappable I/O / Port A |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply (3.3V) |
| Pin 12 | RP7/OC5V3 — Remappable I/O / Output Compare 5 |
| Pin 13 | RP6/OC4V4 — Remappable I/O / Output Compare 4 |
| Pin 14 | RP5/PA9 — Remappable I/O / Port A |
| Pin 15 | RP4/PA8 — Remappable I/O / Port A |
| Pin 16 | RP3/PA7 — Remappable I/O / Port A |
| Pin 17 | RP2/PA6 — Remappable I/O / Port A |
| Pin 18 | RP1/OC3V3/INT3 — Remappable I/O / Output Compare 3 / External Interrupt 3 |
| Pin 19 | RP0/OC2V2/INT2 — Remappable I/O / Output Compare 2 / External Interrupt 2 |
| Pin 20 | AN0/VREF+/PGA1 — Analog input 0 / ADC VREF+ / PGA positive |
| Pin 21 | AN1/VREF-/PGA1 — Analog input 1 / ADC VREF- / PGA negative |
| Pin 22 | AN2/PGAC1 — Analog input 2 / PGA compensation |
| Pin 23 | AN3 — Analog input 3 |
| Pin 24 | AN4 — Analog input 4 |
| Pin 25 | AN5 — Analog input 5 |
| Pin 26 | AN6 — Analog input 6 |
| Pin 27 | VSS — Ground reference |
| Pin 28 | VDD — Positive supply (3.3V) |
| Pin 29 | AN7 — Analog input 7 |
| Pin 30 | AN8 — Analog input 8 |
| Pin 31 | AN9 — Analog input 9 |
| Pin 32 | AN10/CVREF — Analog input 10 / Comparator Voltage Reference |
| Pin 33 | AN11 — Analog input 11 |
| Pin 34 | AN12 — Analog input 12 |
| Pin 35 | AN13 — Analog input 13 |
| Pin 36 | AN14 — Analog input 14 |
| Pin 37 | AN15 — Analog input 15 |
| Pin 38 | RP16/OC8V8 — Remappable I/O / Output Compare 8 |
| Pin 39 | OSCI/CLKI — Oscillator crystal input / external clock in |
| Pin 40 | OSCO/CLKO — Oscillator crystal output / system clock out |
| Pin 41 | RP17/OC9V9 — Remappable I/O / Output Compare 9 |
| Pin 42 | PGD/EMUD — Programming data / ICD EMU data |
| Pin 43 | PGC/EMUC — Programming clock / ICD EMU clock |
| Pin 44 | AVSS — Analog ground reference |
Typical Applications
PIC24HJ32GP304-I/PT is suitable for 7 applications: Industrial Motor Control, Digital Power Conversion Control, Capacitive Touch Sensing, Industrial Sensor Hubs, Building Automation HVAC, Automotive Body Electronics, Uninterruptible Power Supply Controller.
Industrial Motor Control
The PIC24HJ32GP304-I/PT's 40 MIPS throughput and three 16-bit timers (pairable to one 32-bit) make it well-suited for sensorless BLDC and PMSM motor control loops. The Output Compare modules drive PWM signals up to 40 kHz at center-aligned mode with dead-band control, while the 12-bit ADC at 500 ksps samples phase currents with low latency. The 8-channel DMA engine transfers ADC samples to RAM without CPU intervention, freeing the core to run field-oriented control math. Per the PIC24H datasheet, the CTMU can be used for BEMF zero-cross detection on low-cost sensorless drives.
Recommended
Digital Power Conversion Control
The 40 MIPS performance and 12-bit ADC make the PIC24HJ32GP304-I/PT a cost-effective controller for digital PFC, full-bridge, and LLC resonant converters. The Output Compare modules generate high-resolution PWM at up to 1 ns edge placement in PWM mode, enabling tight control of duty cycle for power factor correction. The DMA channels stream ADC results into circular buffers while the CPU executes the voltage-mode or current-mode control law. The 32 KB Flash is sufficient for state-space and adaptive digital control algorithms in sub-kW converters.
Recommended
Capacitive Touch Sensing
The PIC24HJ32GP304-I/PT integrates the Charge Time Measurement Unit (CTMU), which provides a constant-current source and timing measurement for capacitive touch buttons, sliders, and proximity sensors. Combined with the 12-bit ADC and DMA, the MCU can scan 8-16 touch channels at high update rates while running touch classification algorithms in firmware. The 4 KB RAM is sufficient for gesture state machines and debounce buffers. The 21 I/O pins allow the GPIO to drive LED feedback and mechanical button override alongside the touch electrodes.
Recommended
Industrial Sensor Hubs
The combination of UART, SPI, I2C, and ECAN peripherals makes the PIC24HJ32GP304-I/PT an effective industrial sensor hub that aggregates data from SPI sensors and forwards it over CAN to a master controller. The DMA engine handles burst transfers from sensor FIFOs without CPU load, while the 12-bit ADC monitors analog process variables such as temperature or pressure. The 32 KB Flash supports MODBUS or CANopen protocol stacks. The 44-TQFP package provides ample I/O for multiple sensor interfaces plus a debugging UART.
Recommended
Building Automation HVAC
The PIC24HJ32GP304-I/PT's mix of analog and digital peripherals suits it for HVAC damper and valve controllers, fan-speed regulators, and building-automation node endpoints. The 12-bit ADC reads temperature, humidity, and pressure sensor outputs, while the PWM modules drive TRIAC optocouplers for AC load switching. ECAN support allows the node to integrate into BACnet or CANopen building-automation trunks. The 32 KB Flash accommodates control-loop firmware plus scheduling logic for setpoint management.
Recommended
Automotive Body Electronics
Although the I-grade variant is industrial-temperature rated (-40 C to +85 C), the PIC24HJ32GP304-I/PT architecture and ECAN peripheral make it a fit for non-safety automotive body modules such as lighting controllers, mirror adjusters, and accessory multiplexers. The 12-bit ADC reads switch contact inputs and Hall-effect sensors, while the PWM outputs drive LED current sinks. CAN connectivity integrates the module into the vehicle body network. For AEC-Q100 qualified equivalents, see the PIC24HJ32GP304-E/PT or Q-Grade parts from Microchip.
Recommended
Uninterruptible Power Supply Controller
The PIC24HJ32GP304-I/PT's 12-bit ADC at 500 ksps and 40 MIPS performance enable real-time monitoring of battery voltage, load current, and inverter output in small UPS systems. The Output Compare modules generate 50/60 Hz PWM for the inverter stage, while the DMA controller streams ADC samples into the control loop buffer. ECAN or UART can report telemetry to a host processor or display panel. The 32 KB Flash holds inverter control firmware plus state-of-charge estimation logic for lead-acid or Li-ion battery packs.
Recommended
Recommended Products Summary
Engineering reference data for PIC24HJ32GP304-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24HJ32GP304T-I/PT | PIC24HJ32GP304-I/ML | PIC24HJ128GP504-I/PT | PIC24HJ128GP504T-I/PT | PIC24HJ256GP206AT-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | QFN-44 - same silicon, different footprint | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC24H 16-bit | PIC24H 16-bit | PIC24H 16-bit | PIC24H 16-bit | PIC24H 16-bit | PIC24H 16-bit |
| Flash Memory | 32 KB | 32 KB | 32 KB | 128 KB | 128 KB | 256 KB |
| RAM | 4 KB | 4 KB | 4 KB | 8 KB | 8 KB | 16 KB |
| Max CPU Speed | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz | 40 MIPS / 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 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Same-family 32 KB Flash variant in TQFP-44 (vs PIC24HJ32GP304T-I/PT)
- Direct upgrade path to 128 KB Flash same package (vs PIC24HJ128GP504-I/PT)
- ECAN peripheral for industrial networking (vs PIC24HJ32GP202-I/SP)
- 8-channel DMA controller for offloaded transfers (vs PIC24FJ64GA002-I/SO)
Design Notes
Place a 0.1 uF decoupling capacitor within 3 mm of each VDD pin (pins 11 and 28) and a bulk 4.7 uF or 10 uF tantalum/ceramic on the 3.3 V rail. The PIC24HJ32GP304-I/PT can source inrush current of up to ~50 mA during ADC sampling bursts, so the supply must respond quickly. Use an LDO with at least 200 mA headroom and PSRR above 50 dB at 1 MHz to avoid ADC reference noise. Add a 10 uF bulk on AVSS-grounded analog supply if used.
Configure unused pins as digital outputs (not inputs) to avoid floating-pin shoot-through current. Ensure the MCLR pin (pin 7) has a 10 kohm pull-up to VDD, with a 100 nF cap to ground for EMI filtering. Per the datasheet, programming pins PGD/PGC (pins 42/43) must not be used as outputs during reset or the ICD may not be able to communicate. JTAG/ICD connector isolation is required if the board operates near noisy switching nodes.
Route analog traces (AN0-AN15) away from switching PWM traces and use a ground plane with a single point AVSS connection. The VREF+/VREF- pins require a clean 3.0 V reference; an external low-noise reference such as MCP1501-20 may improve ADC accuracy at 12-bit level. Place a 0.1 uF and 10 uF cap pair on VREF+ to filter ADC reference noise. Shield the analog input traces with guard rings tied to AVSS if high-impedance sources are used.
The TQFP-44 package has a thermal resistance theta_JA of approximately 50 C/W in still air. At 40 MHz and 3.3 V the active current is ~50 mA, dissipating ~165 mW; thermal rise is ~8 C above ambient, which is well within the 85 C industrial max. Estimated: with VDD=3.3 V, IDD_ACTIVE=50 mA typical per datasheet. Ensure that self-heating plus ambient does not exceed 85 C; no heatsink is required.