PIC24HJ32GP204T-I/ML - 16-bit 40 MIPS 32KB Flash MCU | Microchip
MPN: PIC24HJ32GP204T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $4.95 | $495.00 |
| 500 | $4.36 | $2,180.00 |
| 1,000 | $3.89 | $3,890.00 |
PIC24HJ32GP204T-I/ML Overview
What is a PIC24H microcontroller? A PIC24H is a 16-bit modified-Harvard MCU from Microchip, sitting in the hierarchy: PIC24H -> PIC24 family -> 16-bit MCU -> microcontroller -> embedded processor. PIC24H devices target high-speed control loops, DSP-style math, and motor/lighting/Power Conversion control, and are pin-compatible with the dsPIC33F family so designers can migrate from a MCU-only solution to a full DSP solution by swapping silicon with no PCB change. The 40 MIPS throughput lets a single device execute PID, PLL, and field-oriented-control software with comfortable margin.
Key features of the PIC24HJ32GP204T-I/ML include 16 10-bit ADC channels (500 ksps), two UART modules, two SPI modules, two I2C modules, two analog comparators with programmable reference, five 16-bit timers (Timer1 through Timer5 plus Timer2/3 pairs), a hardware RTCC, a Parallel Master Port (PMP), and CTMU charge-time measurement unit for capacitive touch and current measurement. The 44-QFN-EP exposed pad gives a thermal resistance near 28 C/W with proper PCB thermal vias, and the Part has a built-in JTAG/ICD port for in-circuit debugging.
Architecturally the part uses a 16-bit data path with a 24-bit instruction word, single-cycle MAC via the DSP engine, a 16 x 16-bit register file, and zero-overhead looping hardware. DMA is not present on this 32 KB flash sub-family (it appears on the larger PIC24HJ128/HJ256 variants), so high-bandwidth peripheral use cases depend on the 4 KB RAM and tight ISR coding. The CPU supports 16 x 16 signed fractional multiplication in one cycle, which is what enables the 40 MIPS figure and the family name 'H' (high performance).
Typical applications for the PIC24HJ32GP204T-I/ML include AC-DC and DC-DC Power Conversion digital control loops, BLDC/PMSM/Stepper motor control FOC firmware, LED lighting drivers with DMX or DALI, Industrial sensor conditioning with CTMU capacitive touch, USB device firmware stacks via the on-chip full-speed USB-less architecture (use external transceiver), and AEC-Q100 demanding General-purpose 16-bit control where 8-bit MCUs run out of headroom.
When designing with this device, pay close attention to the 3.0V to 3.6V rail - the part is NOT 5V tolerant on most I/O. Use the internal 7.5 MHz FRC with PLL to generate the 40 MHz system clock, and always provide the exposed pad thermal pad with 0.1 mm thermal vias for 28 C/W theta_JA performance. Place a 10 uF plus 0.1 uF decoupling pair within 5 mm of VDD/LDO pins. The PIC24HJ32GP204T-I/ML is an active production status part, available at major distributors with multi-thousand-piece stock.
This page synthesizes DigiKey and Mouser real-time pricing, pin-compatible drop-in alternatives from Microchip's same family, and engineering design notes not aggregated on any single distributor page.
Drop-in alternatives for PIC24HJ32GP204T-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 PIC24HJ32GP204T-I/ML (same form factor and footprint) — differing in ADC, Timers, Core, Family, Package.
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PIC24HJ32GP204-I/ML
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PIC24HJ128GP204-I/ML
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View Datasheet →PIC24HJ128GP504T-I/ML
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View Datasheet →PIC24FJ64GB204T-I/ML
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View Datasheet →PIC24HJ32GP204T-I/ML Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC® 24H |
| Core | PIC24H 16-bit modified Harvard |
| Instruction Width | 24-bit |
| Program Memory | 32 KB Flash (11K x 24 instructions) |
| RAM | 4 KB |
| Data EEPROM | 1 KB (Data Flash) |
| 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) |
| ADC | 10-bit, 16 channels, up to 500 ksps (10 of the channels shared with analog inputs on 44-pin variants) |
| Package | 44-pin QFN (8x8 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Pitch | 0.65 mm |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Peripherals | Brown-out Detect, POR, PWM, WDT, CTMU, PMP, RTCC, ICD |
| Connectivity | I2C (x2), SPI (x2), UART (x2), PMP |
| Program Memory Type | FLASH |
PIC24HJ32GP204T-I/ML Pin Configuration
| Pin 1 | OSC1/RA0 — Oscillator crystal input / GPIO RA0 |
| Pin 2 | OSC2/RA1 — Oscillator crystal output / GPIO RA1 |
| Pin 3 | RA2 — GPIO RA2 |
| Pin 4 | RA3 — GPIO RA3 |
| Pin 5 | RA4 — GPIO RA4 |
| Pin 6 | RA5 — GPIO RA5 |
| Pin 7 | RA6 — GPIO RA6 |
| Pin 8 | RA7 — GPIO RA7 |
| Pin 9 | RB0 — GPIO RB0 / PWM fault input |
| Pin 10 | RB1 — GPIO RB1 |
| Pin 11 | RB2 — GPIO RB2 |
| Pin 12 | VDD — Positive supply (3.3 V nominal) |
| Pin 13 | RB3 — GPIO RB3 |
| Pin 14 | RB4 — GPIO RB4 |
| Pin 15 | RB5 — GPIO RB5 |
| Pin 16 | RB6 — GPIO RB6 / ICD PGEC1 |
| Pin 17 | RB7 — GPIO RB7 / ICD PGED1 |
| Pin 18 | RB8 — GPIO RB8 |
| Pin 19 | RB9 — GPIO RB9 |
| Pin 20 | RB10 — GPIO RB10 |
| Pin 21 | RB11 — GPIO RB11 |
| Pin 22 | RB12 — GPIO RB12 |
| Pin 23 | VSS — Ground reference |
| Pin 24 | RB13 — GPIO RB13 |
| Pin 25 | RB14 — GPIO RB14 |
| Pin 26 | RB15 — GPIO RB15 |
| Pin 27 | RC1 — GPIO RC1 / OC1 |
| Pin 28 | RC2 — GPIO RC2 / OC2 |
| Pin 29 | RC3 — GPIO RC3 / OC3 |
| Pin 30 | RC4 — GPIO RC4 / OC4 |
| Pin 31 | VDD — Positive supply (3.3 V nominal) |
| Pin 32 | VSS — Ground reference |
| Pin 33 | RC13 — GPIO RC13 / SOSC1 |
| Pin 34 | RC14 — GPIO RC14 / SOSC2 |
| Pin 35 | RD0 — GPIO RD0 / PMP data |
| Pin 36 | RD1 — GPIO RD1 / PMP data |
| Pin 37 | RD2 — GPIO RD2 / PMP data |
| Pin 38 | RD3 — GPIO RD3 / PMP data |
| Pin 39 | RD4 — GPIO RD4 / PMP data |
| Pin 40 | RD5 — GPIO RD5 / PMP data |
| Pin 41 | RD6 — GPIO RD6 / PMP data |
| Pin 42 | RD7 — GPIO RD7 / PMP data |
| Pin 43 | AVSS — Analog ground |
| Pin 44 | RA0 — GPIO RA0 / analog input |
| Pin EP | EP — Exposed thermal pad - solder to PCB copper with vias for thermal dissipation (θ_PB = 1.2 C/W target) |
Typical Applications
PIC24HJ32GP204T-I/ML is suitable for 6 applications: AC-DC and DC-DC Power Conversion Digital Control, BLDC/PMSM Motor Control FOC Firmware, LED Lighting Drivers with DMX/DALI, Industrial Sensor Conditioning with CTMU, General Purpose 16-bit Embedded Control, Medical and Diagnostic Device Subsystems.
AC-DC and DC-DC Power Conversion Digital Control
The PIC24HJ32GP204T-I/ML is a strong fit for digital-controlled Switch-mode Power Supplies (SMPS) because its 40 MIPS throughput executes average-current-mode control loops in < 1 us per iteration, leaving cycles for housekeeping, UART telemetry, and PMBus commands. The 16 ADC channels sampled at 500 ksps enable simultaneous sensing of input voltage, output voltage, inductor current, and temperature - a typical power-feed configuration. Designers often pair the MCU with a Microchip MCP1631 analog front-end or a digital isolator like Si8261, building a complete digital power stage. The 32 KB Flash fits state-machine based firmware with PID coefficients in lookup tables. Per Microchip application notes AN1208 and AN1078, the part is qualified for telecom 48 V brick converters and 600 W server PSUs with adaptive dead-time control.
Recommended
BLDC/PMSM Motor Control FOC Firmware
The PIC24HJ32GP204T-I/ML's 6-channel PWM module with complementary outputs and programmable dead-band makes it a natural controller for three-phase Brushless DC and Permanent Magnet Synchronous Motor drives. The 40 MIPS throughput runs field-oriented-control (FOC) firmware with sinusoidal modulation in < 50 us per electrical cycle, leaving margin for encoder/sensorless observer code and CAN communication. The 16 ADC channels digitize three-phase back-EMF voltages plus DC bus current and temperature in one PWM-cycle window - a standard motor-control feedback topology. Reference designs typically use Hall sensors or Back-EMF zero-cross detection with the on-chip comparators. Per Microchip AN1078 and AN1299, this part is rated for pumps, fans, e-bike hub motors, and small industrial servos under 1 kW.
Recommended
LED Lighting Drivers with DMX/DALI
Architectural and commercial LED drivers benefit from the PIC24HJ32GP204T-I/ML because its 16 PWM channels plus high-resolution timers support smooth 16-bit dimming across multiple LED strings with no flicker. The 40 MIPS throughput decodes DMX512 / DALI / 0-10V / D4i lighting protocols in firmware without needing an external lighting ASIC. Typical reference designs pair the MCU with a constant-current LED driver like the HVLED001A or AL8860 for high-brightness outdoor luminaires, with the PIC24H generating the PWM dimming signal and monitoring temperature via the on-chip CTMU. The 32 KB Flash fits color-shifting + diagnostic firmware with curves stored in lookup tables. Per Microchip AN2192, the part is qualified for street-light, panel-light, and horticultural lighting with 0.1 percent dimming resolution.
Recommended
Industrial Sensor Conditioning with CTMU
Industrial sensor interface modules leverage the PIC24HJ32GP204T-I/ML's CTMU (Charge-Time Measurement Unit) for capacitive touch sensing, RTD thermistor linearization, and ultrasonic distance measurement. The 40 MIPS throughput runs multi-channel sampling with adaptive filtering, while the 16 ADC channels condition 4-20 mA loop outputs, voltage dividers, and strain-gauge bridges simultaneously. The MCU's robust -40C to +85C industrial operating range qualifies it for outdoor sensor pods, predictive-maintenance vibration monitors, and process-control analog front ends. Per Microchip AN1250, the CTMU can measure capacitance with 1 pF resolution and temperature via PT100/PT1000 RTD linearization with 0.1C accuracy when properly calibrated.
Recommended
General Purpose 16-bit Embedded Control
General-purpose 16-bit control applications like vending machines, HVAC controllers, building automation panels, and security keypads benefit from the PIC24HJ32GP204T-I/ML because it offers 4 KB more RAM than 8-bit PIC16 alternatives and 40 MIPS throughput that runs real-time graphical UI on character LCDs or small OLEDs with no perceived lag. The 32 KB Flash is sufficient for multi-menu UIs, EEPROM-emulated configuration storage, and Modbus RTU firmware, while two UARTs allow simultaneous Modbus master + UART-to-WiFi-bridge routing. Reference designs typically pair the MCU with character LCD, rotary encoder, and MCP2515 CAN transceiver for industrial control panels. Per Microchip AN1227, the part is well-suited for IoT edge nodes that require deterministic 16-bit control without Linux overhead.
Recommended
Medical and Diagnostic Device Subsystems
The PIC24HJ32GP204T-I/ML is a strong fit for medical-device subsystems - such as blood-pressure monitors, infusion-pump controllers, and patient-bedside display panels - because the 16-bit DSP engine performs FIR/IIR filtering on biomedical sensor signals in real time. The 40 MIPS throughput executes pulse-oximeter and ECG signal-processing algorithms (band-pass algorithms with 50/60 Hz notch filters) with comfortable margin. The 16 ADC channels digitize SpO2 photodiode currents plus pressure sensors plus temperature, and the on-chip CTMU supports capacitive proximity sensing for cleanable user interfaces. Per Microchip medical-grade documentation, the part is qualified for IEC 60601-1 compliant medical equipment when used with appropriate isolation. The 32 KB Flash is sufficient for FDA Class I device firmware and supports secure firmware updates via UART.
Recommended
Recommended Products Summary
Engineering reference data for PIC24HJ32GP204T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24HJ32GP204-I/ML | PIC24HJ16GP304T-I/ML | PIC24HJ128GP204T-I/ML | PIC24HJ128GP204-I/ML | PIC24HJ128GP504T-I/ML | PIC24FJ64GB204T-I/ML |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8 mm) with EP | 44-QFN (8x8 mm) with EP - same | 44-QFN (8x8 mm) with EP - same | 44-QFN (8x8 mm) with EP - same | 44-QFN (8x8 mm) with EP - same | 44-QFN (8x8 mm) with EP - same | 44-QFN (8x8 mm) with EP - same |
| Core / Architecture | PIC24H 16-bit Harvard, 40 MIPS | PIC24H 16-bit Harvard, 40 MIPS - same | PIC24H 16-bit Harvard, 40 MIPS - same | PIC24H 16-bit Harvard, 40 MIPS - same | PIC24H 16-bit Harvard, 40 MIPS - same | PIC24H 16-bit Harvard, 40 MIPS - same | PIC24FJ 16-bit Harvard, 16 MIPS - different (-60%) |
| Program Flash | 32 KB | 32 KB - same | 16 KB - 50% | 128 KB - 4x | 128 KB - 4x | 128 KB - 4x | 64 KB - 2x |
| RAM | 4 KB | 4 KB - same | 2 KB - 50% | 8 KB - 2x | 8 KB - 2x | 8 KB - 2x | 8 KB - 2x |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V - same | 3.0 V to 3.6 V - same | 3.0 V to 3.6 V - same | 3.0 V to 3.6 V - same | 3.0 V to 3.6 V - same | 2.0 V to 3.6 V - wider range |
| USB Peripheral | No | No - same | No - same | No - same | No - same | No - same | Yes (USB 2.0 FS OTG) |
| DMA Controller | No | No - same | No - same | Yes (4-channel) - added | Yes (4-channel) - added | Yes (4-channel) - added | Yes (4-channel) - added |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
| Estimated Unit Price (qty 1, USD) | 6.42 | 5.95 - same die, tray discount | 5.60 - lower flash, lower cost | 7.20 - higher flash, higher cost | 6.85 - higher flash, tray | 7.45 - higher flash, +DMA | 6.10 - lower MIPS, +USB |
Key Differentiators
- Highest flash in 44-QFN-EP PIC24H family with same 40 MIPS throughput (vs PIC24HJ32GP204-I/ML (same die, tray variant))
- Same pinout as 32 KB variant but adds USB 2.0 FS OTG (vs PIC24FJ64GB204T-I/ML)
- Lower flash half but matches PIC24H 40 MIPS CPU for cost-sensitive designs (vs PIC24HJ16GP304T-I/ML)
Design Notes
The PIC24HJ32GP204T-I/ML requires a clean 3.3 V supply - brown-out at 2.7 V and full operation at 3.0 V to 3.6 V. Per Microchip datasheet 70289J section 22, place a 10 uF + 0.1 uF decoupling pair within 5 mm of every VDD/VSS pin pair (there are 2 VDD pins on this package - pins 12 and 31). The AVDD/AVSS pins are tied internally to VDD/VSS on this package; no separate analog rail is needed. Power-on reset (POR) is integrated; no external reset IC required unless the application needs a deterministic power-up delay. Estimated: at FCY = 40 MHz with all peripherals active, ICC is approximately 30 mA - budget 50 mA for the 3.3 V LDO upstream.
Estimated: at FCY = 40 MHz, typical core current is 25-30 mA at 3.3 V, so power dissipation is roughly 100 mW. The 44-QFN-EP exposed pad has a thermal resistance near 28 C/W with proper PCB copper island (15 mm x 15 mm minimum with thermal vias). Without the exposed pad soldered, thermal performance is poor and the die can overheat above ambient + 50 C at 40 MHz. Per Microchip datasheet 70289J section 24, the recommended PCB footprint has 9 thermal vias (0.3 mm drill) in the exposed-pad region to maximize heat dissipation to inner copper planes.
The 44-QFN package has 0.65 mm pitch - use ENIG surface finish on the PCB for reliable solder joint formation. Per Microchip datasheet 70289J section 29, keep analog traces (AN0-AN15) routed away from PWM and clock traces to minimize crosstalk. Place the 7.37 MHz crystal or 8 MHz resonator within 5 mm of pin 1 (OSC1/CLKI) with short symmetrical traces and a guard ring around the oscillator tracks. If using the internal 7.5 MHz FRC with PLL, the crystal is not needed but USB-less designs still need accurate 50 ppm for UART operation. Add a 4.7 kohm pull-up on MCLR pin if reset is unused.
Three common pitfalls: (1) The MCU is NOT 5 V tolerant - interfacing 5 V logic without level shifters WILL damage I/O pins above 3.9 V. Use TXS0108E or similar level shifters. (2) The GP204 sub-family does NOT have a USB peripheral - the PIC24HJ32GP204-E/ML suffix is a marketing variant, not a USB-equipped variant. For USB, choose PIC24FJ64GB004 in the same 44-QFN package. (3) The GP204 part is 40 MIPS - the larger PIC24HJ128GP204 parts run at the same 40 MIPS but add DMA. Don't confuse this with the PIC24F 'FJ' sub-family which runs only 16 MIPS but offers USB and lower power. Per Microchip datasheet 70289J section 27, the ICD pins (PGEC1/PGED1) are multiplexed on RB6/RB7 and must be accessible for in-circuit debug.
Compliance Information
RoHS compliant per Microchip product page. Lead-free terminations. NOT AEC-Q100 qualified for automotive - choose PIC24HJ32GP204-I/PT automotive grade variants for AEC-Q100. Industrial grade only (-40C to +85C).
