PIC24HJ32GP304-I/ML - 16-bit 40MIPS 32KB Flash MCU | Microchip
MPN: PIC24HJ32GP304-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.84 | $4.84 |
| 10 | $4.36 | $43.60 |
| 100 | $3.85 | $385.00 |
| 500 | $3.46 | $1,730.00 |
| 1,000 | $3.08 | $3,080.00 |
| 3,000 | $2.74 | $8,220.00 |
PIC24HJ32GP304-I/ML Overview
A 16-bit microcontroller is a single-chip processor that executes instructions on 16-bit-wide data while typically using a richer instruction set than 8-bit MCUs, sitting in the embedded hierarchy between "microcontrollers" and the application "digital signal controller (DSC)". The PIC24H family occupies the performance tier immediately above PIC24F parts and below dsPIC33F DSC devices, targeting applications that demand high-speed repetitive computation combined with deterministic control. This positions the part in the broader taxonomy: MCU -> microcontroller -> embedded processor -> semiconductor.
Key differentiating features include 32 KB of self-programmable Flash with 11K x 24 organization, hardware DMA with multiple sources, dual 16-bit timers that can pair into a 32-bit timer, three 16-bit timers in total, and rich analog capability through a 12-bit A/D converter. The wide operating voltage range of 3.0 V to 3.6 V with industrial -40C to +85C temperature support makes this part suited for harsh environments.
The PIC24HJ32GP304 architecture combines a 16-bit data path with a 24-bit instruction word and a variable-length opcode field, executing most instructions in a single cycle. This modified Harvard approach yields deterministic timing critical for motor control, power conversion, and DSP-adjacent signal processing, while keeping C-language compilation efficient. The 40 MIPS throughput supports real-time control loops and high-bandwidth communication stacks simultaneously.
Typical applications include industrial motor control, switch-mode power supply (SMPS) digital control loops, sensor signal conditioning with on-chip DSP-like math, automotive body and chassis subsystems, and embedded communication gateways. The on-chip DMA and 40 MIPS throughput also suit this part for medical instrumentation front-ends and remote sensor nodes that must run a full TCP/IP stack while servicing time-sensitive I/O.
When designing with this device, allocate decoupling capacitance close to every VDD/VSS pair, route the 40 MHz crystal traces with short, symmetric layout, and reference the PIC24H Family Reference Manual for peripheral configuration. Plan for code-size growth by reserving the upper Flash page for bootloader or EEPROM emulation, as the part does not contain a dedicated EEPROM array.
This page synthesizes distributor pricing, same-family and cross-package drop-in alternatives from the PIC24H/dsPIC33F family, and practical design notes that complement the manufacturer datasheet rather than restate it.
Drop-in alternatives for PIC24HJ32GP304-I/ML — 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/ML (same form factor and footprint) — differing in Package, ADC, DMA Channels, Timers, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24HJ32GP304T-I/ML
✅ Drop-In✓ In Stock
$3.21 / Unit
View Datasheet →PIC24HJ32GP304-E/ML
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32GP304-I/ML
✅ Drop-In✓ In Stock
$3.49 / Unit
View Datasheet →PIC24HJ32GP304T-E/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24HJ32GP304-I/ML Maximum Ratings & Electrical Characteristics
| Family | PIC24H |
| Core Architecture | 16-bit Modified Harvard |
| Program Memory (Flash) | 32 KB (11K x 24) |
| RAM | 4 KB |
| Maximum CPU Speed | 40 MIPS |
| Operating Frequency | 40 MHz |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial) |
| I/O Pins | 35 |
| ADC | 12-bit, up to 13 channels |
| Timers | Three 16-bit (pairable to 32-bit) |
| DMA Channels | 8-channel hardware DMA |
| Communication Peripherals | UART, SPI, I2C |
| Package | 44-pin QFN (8x8 mm) [ML] |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Yes (Pb-free) |
| Instruction Set | 16-bit data path, 24-bit instruction word, variable-length opcode |
PIC24HJ32GP304-I/ML Pin Configuration
| Pin 1 | RP0/CN0/RB0 — Remappable peripheral pin / CN0 interrupt / RB0 port bit |
| Pin 2 | RP1/CN1/RB1 — Remappable peripheral pin / CN1 interrupt / RB1 port bit |
| Pin 3 | RP2/CN2/RB2 — Remappable peripheral pin / CN2 interrupt / RB2 port bit |
| Pin 4 | RP3/CN3/RB3 — Remappable peripheral pin / CN3 interrupt / RB3 port bit |
| Pin 5 | RP4/CN4/RB4 — Remappable peripheral pin / CN4 interrupt / RB4 port bit |
| Pin 6 | RP5/CN5/RB5 — Remappable peripheral pin / CN5 interrupt / RB5 port bit |
| Pin 7 | RP6/CN6/RB6 — Remappable peripheral pin / CN6 interrupt / RB6 port bit |
| Pin 8 | RP7/CN7/RB7 — Remappable peripheral pin / CN7 interrupt / RB7 port bit |
| Pin 9 | RP8/CN8/RB8 — Remappable peripheral pin / CN8 interrupt / RB8 port bit |
| Pin 10 | RP9/CN9/RB9 — Remappable peripheral pin / CN9 interrupt / RB9 port bit |
| Pin 11 | VSS — Ground reference |
| Pin 12 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Pin 13 | OSC2/CLKO — Crystal oscillator output / clock output |
| Pin 14 | RP10/CN10/RB10 — Remappable peripheral pin / CN10 interrupt / RB10 port bit |
| Pin 15 | RP11/CN11/RB11 — Remappable peripheral pin / CN11 interrupt / RB11 port bit |
| Pin 16 | RP12/CN12/RB12 — Remappable peripheral pin / CN12 interrupt / RB12 port bit |
| Pin 17 | RP13/CN13/RB13 — Remappable peripheral pin / CN13 interrupt / RB13 port bit |
| Pin 18 | RP14/CN14/RB14 — Remappable peripheral pin / CN14 interrupt / RB14 port bit |
| Pin 19 | RP15/CN15/RB15 — Remappable peripheral pin / CN15 interrupt / RB15 port bit |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDD — Positive supply for I/O and core logic (3.0 V to 3.6 V) |
| Pin 22 | RP16/CN16/RC0 — Remappable peripheral pin / CN16 interrupt / RC0 port bit |
| Pin 23 | RP17/CN17/RC1 — Remappable peripheral pin / CN17 interrupt / RC1 port bit |
| Pin 24 | RP18/CN18/RC2 — Remappable peripheral pin / CN18 interrupt / RC2 port bit |
| Pin 25 | RP19/CN19/RC3 — Remappable peripheral pin / CN19 interrupt / RC3 port bit |
| Pin 26 | RP20/CN20/RC4 — Remappable peripheral pin / CN20 interrupt / RC4 port bit |
| Pin 27 | RP21/CN21/RC5 — Remappable peripheral pin / CN21 interrupt / RC5 port bit |
| Pin 28 | RP22/CN22/RC6 — Remappable peripheral pin / CN22 interrupt / RC6 port bit |
| Pin 29 | RP23/CN23/RC7 — Remappable peripheral pin / CN23 interrupt / RC7 port bit |
| Pin 30 | RP24/CN24/RC8 — Remappable peripheral pin / CN24 interrupt / RC8 port bit |
| Pin 31 | RP25/CN25/RC9 — Remappable peripheral pin / CN25 interrupt / RC9 port bit |
| Pin 32 | MCLR — Master Clear (reset) input, active low |
| Pin 33 | PGEC1/AN0/RP26 — ICD clock / analog input AN0 / remappable RP26 |
| Pin 34 | PGED1/AN1/RP27 — ICD data / analog input AN1 / remappable RP27 |
| Pin 35 | AN2/RP28 — Analog input AN2 / remappable RP28 |
| Pin 36 | AN3/RP29 — Analog input AN3 / remappable RP29 |
| Pin 37 | AN4/RP30 — Analog input AN4 / remappable RP30 |
| Pin 38 | AN5/RP31 — Analog input AN5 / remappable RP31 |
| Pin 39 | AVSS — Analog ground reference |
| Pin 40 | AVDD — Analog positive supply (3.0 V to 3.6 V) |
| Pin 41 | VDD — Positive supply for I/O and core logic (3.0 V to 3.6 V) |
| Pin 42 | VSS — Ground reference |
| Pin 43 | AN6/OC1/RP32 — Analog input AN6 / Output Compare 1 / remappable RP32 |
| Pin 44 | AN7/OC2/RP33 — Analog input AN7 / Output Compare 2 / remappable RP33 |
Typical Applications
PIC24HJ32GP304-I/ML is suitable for 7 applications: Industrial Motor Control, Switch-Mode Power Supply (SMPS) Digital Control, Sensor Signal Conditioning and IoT Edge Nodes, Automotive Body and Chassis Subsystems, Medical Instrumentation Front-End, Industrial Communication Gateway, Display and User-Interface Controllers.
Industrial Motor Control
The PIC24HJ32GP304-I/ML's 40 MIPS throughput and 12-bit ADC suit it well for sensorless BLDC and PMSM motor control loops running field-oriented control (FOC) algorithms. The DMA controller offloads ADC sample transfers into RAM without CPU intervention, freeing cycles for the PI current loop and SVPWM modulation. Hardware PWM with complementary outputs and dead-band control drives three-phase inverters directly, while the 32 KB Flash holds reference C code, the 4 KB RAM captures per-cycle ADC buffers. The industrial -40C to +85C temperature grade handles factory-floor environments, and the 44-pin QFN package provides enough I/O for Hall/encoder feedback plus UART/CAN-style communication.
Recommended
Switch-Mode Power Supply (SMPS) Digital Control
Digital control loops for switch-mode power supplies demand deterministic cycle execution, which the PIC24HJ32GP304-I/ML delivers at 40 MIPS with single-cycle multiply and 16-bit division. The 12-bit ADC samples output voltage and current at high rate, while hardware PWM drives the MOSFET gate at fixed switching frequency (typ. 100-500 kHz). The on-chip DMA streams ADC results into RAM and feeds the digital compensator, achieving control-loop latency under 25 ns. With 32 KB Flash, designers can implement peak current-mode control, adaptive dead-time, and soft-start state machines in a single part. The 3.0 V to 3.6 V supply matches typical auxiliary rails in AC-DC and DC-DC converters.
Recommended
Sensor Signal Conditioning and IoT Edge Nodes
For industrial IoT edge nodes combining analog sensor conditioning with protocol stack execution, the PIC24HJ32GP304-I/ML strikes a balance between throughput, peripherals, and power. The 12-bit ADC samples thermocouple, strain-gauge, or 4-20 mA loop signals while the DMA controller runs in the background. UART, SPI, and I2C interfaces connect to radios (Wi-Fi, LoRa, Sub-GHz) or to a host MCU. The 32 KB Flash is large enough to embed a lightweight TCP/IP stack or MQTT-SN client alongside the sensing code, while the 4 KB RAM holds packet buffers and ADC history. Industrial temperature grade supports outdoor and factory deployments without additional qualification.
Recommended
Automotive Body and Chassis Subsystems
Body controllers and chassis subsystems (window lifters, seat controllers, HVAC dampers) require 40 MIPS of deterministic control plus CAN or LIN networking. The PIC24HJ32GP304-I/ML's UART modules, when paired with an external CAN/LIN transceiver, support both protocols. The 12-bit ADC reads potentiometers and current sense amplifiers, while PWM outputs drive motor drivers and LED backlight dimming. For under-hood or extreme-temperature zones, the extended-grade PIC24HJ32GP304-E/ML (same QFN-44 package) supports -40C to +125C. The 32 KB Flash accommodates AUTOSAR-lite or proprietary body-controller firmware without external memory.
Recommended
Medical Instrumentation Front-End
Medical devices such as portable pulse oximeters, blood-pressure cuffs, and handheld diagnostic tools need accurate analog measurement, deterministic response, and reliable firmware. The PIC24HJ32GP304-I/ML's 12-bit ADC with DMA support samples photodiode or bridge signals at high rate, while the 40 MIPS core runs calibration and filtering algorithms. The 32 KB Flash stores application code plus lookup tables for SpO2 or NIBP algorithms, and the 4 KB RAM holds running statistics. USB device stacks can be added via the Microchip app-note framework using the UART and I/O pins as a software USB bridge, or by pairing with an external USB-to-UART bridge. The industrial temperature grade supports typical clinical environments.
Recommended
Industrial Communication Gateway
Bridging legacy RS-232/RS-485 industrial fieldbuses to modern Ethernet or USB hosts is a natural fit for the PIC24HJ32GP304-I/ML. Two UARTs handle dual RS-485 links (Modbus RTU, DMX, or proprietary protocols) while an SPI-connected Ethernet controller (e.g., ENC28J60) provides uplink. The DMA controller streams packets into RAM, freeing the CPU to run protocol translation. The 32 KB Flash fits Modbus master/slave stacks, and the 4 KB RAM serves as packet buffer space. Industrial temperature grade allows DIN-rail mounting inside control cabinets without thermal derating.
Recommended
Display and User-Interface Controllers
HMI panels, vending machine keypads, and small LCD/TFT displays require a microcontroller capable of refreshing graphics, scanning keypads, and driving LEDs without lag. The PIC24HJ32GP304-I/ML drives parallel character LCDs or small SPI TFTs through GPIO, while the 12-bit ADC reads resistive touch panels and potentiometers. DMA transfers refresh buffers to the display with minimal CPU overhead. With 35 I/O pins, the QFN-44 package supports up to a 7x8 matrix keypad plus dedicated display data lines. The 32 KB Flash holds multi-language menus and bitmap assets.
Recommended
Recommended Products Summary
Engineering reference data for PIC24HJ32GP304-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24HJ32GP304T-I/ML | PIC24HJ32GP304-E/ML | dsPIC33FJ32GP304-I/ML | PIC24HJ32GP304T-E/ML |
|---|---|---|---|---|---|
| Package | 44-pin QFN (8x8) [ML] | 44-pin QFN (8x8) [ML] - same | 44-pin QFN (8x8) [ML] - same | 44-pin QFN (8x8) [ML] - same | 44-pin QFN (8x8) [ML] - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Family | PIC24H (16-bit) | PIC24H (16-bit) | PIC24H (16-bit) | dsPIC33F (16-bit MCU + DSP) | PIC24H (16-bit) |
| Flash / RAM | 32 KB / 4 KB | 32 KB / 4 KB | 32 KB / 4 KB | 32 KB / 4 KB | 32 KB / 4 KB |
| Maximum Speed | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz + DSP | 40 MIPS / 40 MHz |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) |
| DSP Engine | No | No | No | Yes (MAC + DSP instructions) | No |
| Price Tier (qty 1) | USD 4.84 | USD ~4.84 (similar) | USD ~5.50 (extended grade premium) | USD ~6.40 (DSP premium) | USD ~5.50 (extended grade premium) |
Key Differentiators
- Pin-compatible upgrade path to dsPIC33F DSP engine (vs dsPIC33FJ32GP304-I/ML)
- Extended-temperature variant available in same package (vs PIC24HJ32GP304-E/ML)
- 8-channel DMA controller at 40 MIPS (vs PIC24HJ32GP204-I/PT)
Design Notes
Estimated: place one 100 nF decoupling capacitor within 2 mm of every VDD/VSS pair (pins 11, 20, 21, 39, 40, 41, 42) and one 10 uF bulk tantalum or ceramic near the AVDD pin. Route the crystal traces between OSC1 and OSC2 with short, symmetric traces under 5 mm and guard them with a ground pour. The QFN-44 exposed thermal pad (EP) must be soldered to a continuous ground plane with at least 4 thermal vias for heat dissipation.
Use the PIC24H Family Reference Manual DMA chapter to map DMA channels for ADC-to-RAM transfers. Configure sampling and conversion triggers back-to-back for zero-overhead ADC sequencing, and use the DMA in ping-pong mode for continuous double buffering. Keep digital switching traces (PWM outputs, SPI clock) away from the analog AVSS/AVDD pins, and consider a guard ring tied to AVSS around the analog input pins to reduce digital noise coupling.
The 40 MHz oscillator and PWM outputs can inject noise into the analog domain if the PCB is not carefully partitioned. Use separate analog and digital ground regions joined at a single point near the AVSS pin. Estimate: at 40 MIPS switching, the digital supply noise measured on the analog supply can exceed 50 mV without proper isolation - sufficient to corrupt 12-bit ADC readings at low signal levels.
Do not leave the MCLR pin floating - tie it to VDD through a 10 kohm pull-up and a 100 nF cap to ground for in-circuit-debugger isolation. Always configure the JTAG/ICD pins (PGEC1/PGED1) as analog inputs at reset; otherwise debug will fail. Reference the device errata (DS80233) for any ADC or DMA anomalies that affect your design before locking firmware, and use the latest XC16 compiler version for full PIC24H support.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial -40C to +85C grade; AEC-Q100 qualified variants available in extended-grade ordering codes (PIC24HJ32GP304-E/ML). Halogen-free status not explicitly stated in retrieved data.
