PIC24HJ64GP502-I/SO - 40 MIPS 16-bit MCU 64KB Flash 28-SOIC | Microchip
MPN: PIC24HJ64GP502-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.92 | $6.92 |
| 10 | $6.18 | $61.80 |
| 100 | $5.22 | $522.00 |
| 500 | $4.62 | $2,310.00 |
| 1,000 | $4.1 | $4,100.00 |
PIC24HJ64GP502-I/SO Overview
What is a PIC24H microcontroller? The PIC24H is Microchip's general-purpose 16-bit DSC/MCU family built on a modified Harvard architecture with a single-cycle instruction fetch and a 16-bit data path. It sits in the hierarchy: PIC24H -> 16-bit MCU -> microcontroller -> embedded processor -> semiconductor. The 'H' suffix denotes the highest-performance PIC24 sub-family (40 MIPS), while the lower-cost PIC24F family runs at 16 MIPS and the PIC24E runs at 70 MIPS. PIC24H devices share pin compatibility with the dsPIC33F DSCs and target applications that need high-speed repetitive computation plus rich peripheral integration.
Key features include a 40 MHz internal RC oscillator (with PLL), up to 21 general-purpose I/O pins, three 16-bit timers (pairable into one 32-bit timer), two output-capture modules, two input-capture modules, two UART modules, two SPI modules, an I2C module, a 10/12-bit ADC with up to 10 channels and 500 ksps conversion rate, and a 16-bit parallel master port on larger variants. The analog comparator and CTMU peripheral are also included for touch and current measurement functions.
Architecturally, the PIC24HJ64GP502 uses a 16-bit data path with single-cycle multiply and hardware divide, a 24-bit instruction word for orthogonal addressing, and a deterministic interrupt controller with a configurable 7-cycle latency. The 3.0-3.6 V single-supply operation simplifies power tree design in 3.3 V-only systems, and the integrated voltage regulator with brown-out reset (BOR) and power-on reset (POR) eliminates external supervisory components.
Typical applications include industrial control and automation (PLCs, motor control, sensor conditioning), medical instrumentation (portable patient monitors, diagnostic peripherals), consumer electronics (audio processing, HMI controllers), automotive body and chassis ECUs (non-safety), and IoT edge nodes requiring deterministic real-time response. The 28-pin SOIC footprint also makes it attractive as a pin-compatible migration path from older PIC24F or PIC18 designs that need more CPU headroom.
When designing with this part, ensure the 3.3 V rail is decoupled with at minimum a 10 uF bulk plus 0.1 uF high-frequency capacitor placed within 5 mm of the VDDCORE pin. Programming/debug is performed through the standard ICSP interface (PGECx/PGEDx pins), which can be re-used as digital I/O once the device is in the final application.
This page synthesizes distributor stock and pricing data, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24HJ64GP502-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 PIC24HJ64GP502-I/SO (same form factor and footprint) — differing in ADC, Package, Timers, Program Memory (Flash), Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
dsPIC33FJ64GP502-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24HJ128GP502-I/SO
✅ Drop-In✓ In Stock
$7.45 / Unit
View Datasheet →PIC24HJ64GP502-H/SO
✅ Drop-In✓ In Stock
$5.03 / Unit
View Datasheet →PIC24HJ32GP302-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
dsPIC33FJ32GP302-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24HJ64GP502-I/SO Maximum Ratings & Electrical Characteristics
| Family | PIC24H |
| Core Architecture | 16-bit modified Harvard RISC |
| CPU Speed | 40 MIPS at 3.3 V |
| Instruction Clock | 40 MHz max (FOSC = 80 MHz with 2:1 PLL) |
| Program Memory (Flash) | 64 KB (22K x 24 instructions) |
| Data Memory (SRAM) | 8 KB |
| Operating Voltage | 3.0 V to 3.6 V |
| I/O Pins | 21 |
| Timers | 3 x 16-bit (pairable to 32-bit) |
| ADC | 10-bit 500 ksps, up to 10 channels |
| Communication | 2x UART, 2x SPI, 1x I2C |
| Package | 28-pin SOIC (SO, wide body, 7.5 mm) |
| Operating Temperature | -40 C to +85 C (industrial, I-temp) |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| Lead-Free / RoHS | Yes / Compliant |
| Programming Interface | ICSP (PGECx/PGEDx), JTAG not present on 28-pin SO |
| Brown-Out Reset / POR | Yes, integrated |
PIC24HJ64GP502-I/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active-low |
| Pin 2 | OSC1/RA0 — Crystal oscillator input / GPIO RA0 |
| Pin 3 | OSC2/RA1 — Crystal oscillator output / GPIO RA1 |
| Pin 4 | PGEC1/AN0/RB0 — ICSP clock / analog input 0 / GPIO RB0 |
| Pin 5 | PGED1/AN1/RB1 — ICSP data / analog input 1 / GPIO RB1 |
| Pin 6 | AN2/RB2 — Analog input 2 / GPIO RB2 |
| Pin 7 | AN3/RB3 — Analog input 3 / GPIO RB3 |
| Pin 8 | AN4/RB4 — Analog input 4 / GPIO RB4 |
| Pin 9 | AN5/RB5 — Analog input 5 / GPIO RB5 |
| Pin 10 | AN6/OC1/RB6 — Analog input 6 / Output Compare 1 / GPIO RB6 |
| Pin 11 | AN7/OC2/RB7 — Analog input 7 / Output Compare 2 / GPIO RB7 |
| Pin 12 | AVDD — Analog supply voltage |
| Pin 13 | AVSS — Analog ground |
| Pin 14 | U1TX/RF0 — UART1 transmit / GPIO RF0 |
| Pin 15 | U1RX/RF1 — UART1 receive / GPIO RF1 |
| Pin 16 | SDA1/RG3 — I2C1 data / GPIO RG3 |
| Pin 17 | SCL1/RG2 — I2C1 clock / GPIO RG2 |
| Pin 18 | IC1/RD8 — Input Capture 1 / GPIO RD8 |
| Pin 19 | IC2/RD9 — Input Capture 2 / GPIO RD9 |
| Pin 20 | VDDCORE — 1.8 V core regulator output (VCAP - connect 10 uF + 0.1 uF) |
| Pin 21 | OC3/RD0 — Output Compare 3 / GPIO RD0 |
| Pin 22 | OC4/RD1 — Output Compare 4 / GPIO RD1 |
| Pin 23 | SDO1/RD2 — SPI1 data out / GPIO RD2 |
| Pin 24 | SDI1/RD3 — SPI1 data in / GPIO RD3 |
| Pin 25 | SCK1/RD4 — SPI1 clock / GPIO RD4 |
| Pin 26 | SS1/RD5 — SPI1 slave select / GPIO RD5 |
| Pin 27 | VDD — Digital supply voltage (3.0-3.6 V) |
| Pin 28 | VSS — Digital ground |
Typical Applications
PIC24HJ64GP502-I/SO is suitable for 6 applications: Industrial Motor Control, Portable Medical Instrumentation, Consumer HMI Controller, Automotive Body and Comfort ECU, IoT Edge Sensor Node, Audio Processing and Effects Pedal.
Industrial Motor Control
The PIC24HJ64GP502-I/SO fits industrial motor-control loops from 6-step BLDC to sensored FOC up to ~10 kHz PWM switching. Its 40 MIPS CPU sustains the Park/Clarke transforms at 8 kHz with room left for PI controllers and serial command handling, while the three 16-bit timers generate complementary PWMs with programmable dead-time directly. The 10-bit 500 ksps ADC samples two current shunts and a DC-bus voltage with 1.7 us worst-case conversion, and the 8 KB SRAM holds the FOC state machine, speed ramp and UART command buffer without external memory. Industrial design benefits from the -40 C to +85 C rating, integrated brown-out reset, and a 3.0-3.6 V supply that pairs cleanly with a 12 V->3.3 V step-down stage.
Recommended
Portable Medical Instrumentation
For handheld patient-monitoring peripherals (pulse oximeter front-ends, digital thermometers, spirometer sensors) the PIC24HJ64GP502-I/SO offers the right balance of CPU throughput and low active power. The 16-bit core handles sensor linearization and FIR filtering in real time, while the 10-bit ADC is adequate for thermistor bridges and basic SpO2 photodiode front-ends. The 64 KB Flash accommodates USB CDC class drivers and Bluetooth command protocols, and the 8 KB SRAM is sufficient for moving-average and peak-detection buffers. The industrial -40 C to +85 C rating covers IEC 60601-1 environmental chamber testing, and the small 28-SOIC footprint (17.9 x 7.5 mm) keeps the bill of materials and PCB area small in battery-powered enclosures.
Recommended
Consumer HMI Controller
The PIC24HJ64GP502-I/SO drives small user-interface subsystems such as appliance control panels, washing-machine displays, programmable thermostats and HVAC wall units. Its 21 GPIO can scan an 8x4 matrix keypad with scan-line and return-line interrupts, drive a small TFT or character LCD through SPI, and handle backlight PWM dimming through one of the three 16-bit timers. UART and I2C link to a Wi-Fi or sub-GHz radio module, while the 10-bit ADC reads potentiometer inputs and NTC temperature sensors. The 3.3 V operation simplifies co-design with a capacitive-touch IC, and the SOIC-28 package is friendly to wave-soldering for low-volume consumer production lines.
Recommended
Automotive Body and Comfort ECU
Although not AEC-Q100 qualified itself, the PIC24HJ64GP502-I/SO is used in non-safety automotive body modules such as seat-control ECUs, mirror-adjustment controllers, interior lighting nodes and HVAC blend-door actuators. Its 40 MIPS core handles LIN (Local Interconnect Network) protocol stacks via the UART plus a small protocol engine, while the ADC reads potentiometer wipers and current sense amplifiers for position feedback. The extended -40 C to +85 C industrial temperature range is acceptable for cabin electronics; for under-hood designs use the AEC-Q100 qualified PIC24HJ64GP502-I/SP sibling or the automotive-grade dsPIC33FJ64GP502 variant.
Recommended
IoT Edge Sensor Node
For wireless sensor nodes running Modbus, MQTT-SN or a custom RF protocol over sub-GHz radios, the PIC24HJ64GP502-I/SO provides 40 MIPS to compress and packetize sensor data while leaving enough CPU headroom for over-the-air firmware update via the bootloader. The 64 KB Flash fits a TCP/IP light stack plus the application, and the 8 KB SRAM is sufficient for a UDP socket buffer plus an AES-128 encryption scratch buffer. The three 16-bit timers wake the device from sleep at user-defined intervals, and the low-power Sleep mode with RTCC draws only a few microamps for battery-life-sensitive deployments. The 28-SOIC is small enough for wall-mount sensor enclosures and ships in tape-and-reel for high-volume SMT.
Recommended
Audio Processing and Effects Pedal
The PIC24HJ64GP502-I/SO is a proven platform for digital guitar-effects pedals, MIDI controllers and small audio mixers. The 40 MIPS core sustains stereo 48 kHz 16-bit audio through the two SPI channels connected to external audio CODECs, with 1.7 ms of processing latency per sample - well under the 10 ms perceptual threshold for guitar. The 64 KB Flash fits reverb algorithms, FIR filter banks and preset management, while the 8 KB SRAM stores two 256-tap filter buffers plus a 1 K tap delay line for chorus and slap-back. The 10-bit ADC reads expression pedals and the three 16-bit timers drive PWM output stages; the SOIC-28 footprint and 3.3 V supply are easy to integrate into 9 V battery pedals through a switching regulator.
Recommended
Recommended Products Summary
Engineering reference data for PIC24HJ64GP502-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | dsPIC33FJ64GP502-I/SO | PIC24HJ128GP502-I/SO | PIC24HJ64GP502-H/SO | PIC24HJ32GP302-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (SO, 7.5 mm wide) | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same |
| CPU Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Flash Memory | 64 KB | 64 KB | 128 KB | 64 KB | 32 KB |
| SRAM | 8 KB | 8 KB | 16 KB | 8 KB | 4 KB |
| DSP Engine | No | Yes (16-bit MAC + barrel shifter) | No | No | No |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +125 C (extended) | -40 C to +85 C (industrial) |
| Qty-1 Price (USD, est.) | 6.92 | 7.40 | 8.50 | 9.10 | 5.85 |
Key Differentiators
- More Flash and RAM than the smaller PIC24HJ32GP302 sibling in the same package (vs PIC24HJ32GP302-I/SO)
- Code- and pin-compatible upgrade path to dsPIC33F DSP engine in same SOIC-28 footprint (vs dsPIC33FJ64GP502-I/SO)
- Pin-compatible 128 KB memory variant in the same SOIC-28 footprint (vs PIC24HJ128GP502-I/SO)
Design Notes
Decouple VDD (pin 27) with a 10 uF ceramic + 0.1 uF X7R within 5 mm of the pin, and decouple VDDCORE (pin 20) with a 10 uF low-ESR ceramic + 100 nF in parallel. Place the larger capacitor on the analog side too: AVDD (pin 12) needs 1 uF + 100 nF and AVSS (pin 13) must return to the same ground star as VSS (pin 28). Recommended input power source: MCP1700-3302E LDO for 5 V -> 3.3 V conversion. Estimated: total quiescent current at 3.3 V / 25 C is roughly 2 mA/MIPS * 40 MIPS + analog overhead ~85 mA active; in Sleep mode the part draws under 1 uA.
The 28-SOIC wide-body package has a theta_JA of approximately 50 C/W on a 4-layer JEDEC test PCB (per Microchip packaging specs). At worst-case active current of 85 mA from a 3.3 V rail that is 280 mW of dissipation, producing a 14 C junction temperature rise above ambient - well within the -40 C to +85 C industrial rating. For sealed enclosures without forced airflow, derate by 20% or add a small copper pour to keep junction below 100 C for the 100,000-hour reliability target. Estimated: worst-case junction at 85 C ambient = 85 + 14 = 99 C, leaving only 26 C margin.
Route the ICSP pair PGEC1 (pin 4) and PGED1 (pin 5) to a 0.1-inch 2-pin header near the board edge for in-circuit programming; both can also serve as analog inputs or GPIO after programming, but ensure no capacitive load above 30 pF is placed on these lines during debug or the ICSP may fail. The MCLR pin (pin 1) needs a 10 kohm pull-up to VDD and a 100 nF decoupling capacitor to ground for the integrated POR; place the cap within 5 mm. The crystal oscillator pins OSC1/OSC2 (pins 2/3) should be guarded by a ground ring and the crystal within 5 mm.
Do not leave VDDCORE (pin 20) floating - the internal 1.8 V regulator requires the 10 uF + 100 nF cap on this pin or the device will not start up. Programming mode is entered by driving MCLR low and clocking PGEC1/PGED1, but the device must see a clean rising edge on VDD; inrush current spikes above 100 mA can confuse low-current LDO regulators. The 64 KB Flash is partitioned into 1024 instruction rows - do not erase more than 256 bytes per page-write cycle or flash wear is accelerated. Always configure the JTAGEN fuse OFF for production to free up RB7/AN7 as GPIO.
Compliance Information
RoHS compliant per Microchip product declaration. Not AEC-Q100 qualified - choose dsPIC33FJ64GP502A-E/SO or PIC24HJ64GP502-H/SO for extended or automotive applications. Lead-free matte-tin finish, MSL 1, REACH SVHC compliant.
