PIC24F32KA301-I/P - 32KB Flash 16-bit XLP MCU | Microchip
MPN: PIC24F32KA301-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $3.92 | $39.20 |
| 100 | $3.42 | $342.00 |
| 500 | $3.01 | $1,505.00 |
| 1,000 | $2.72 | $2,720.00 |
PIC24F32KA301-I/P Overview
Background - What is a PIC24F 16-bit MCU? The PIC24F is a 16-bit microcontroller family within Microchip's broader PIC microcontroller portfolio, sitting between the 8-bit PIC16/PIC18 line and the 32-bit PIC32 line. XLP is Microchip's eXtreme Low Power technology umbrella, an architecture for battery-powered and energy-harvesting applications where sleep-mode current draw is the dominant figure of merit. The hierarchy: PIC24F -> 16-bit MCU -> microcontroller -> embedded processor -> semiconductor. PIC24F devices target portable instrumentation, sensor nodes, and consumer products requiring more peripherals and code space than 8-bit MCUs but lower cost and power than ARM Cortex-M parts.
Key features of the PIC24F32KA301-I/P include six 16-bit timers, four PWM modules with independent time bases, three UART/SPI/I2C modules, up to 25 mA source/sink on I/O pins, and a Charge Time Measurement Unit (CTMU) for capacitive touch and temperature sensing. The XLP architecture achieves Deep Sleep currents down to 20 nA typical with brown-out reset and watchdog timer operational, and Run current around 190 uA/MHz at 2 V.
The device uses a Harvard architecture modified-RISC CPU executing 76 instructions with three-stage pipeline. The single-cycle hardware multiplier accelerates DSP-style math, and a 32x32-bit hardware divider is shared with select peripherals. The integrated 12-bit ADC has up to 9 channels (depending on package), 100 ksps conversion rate, and automatic scan modes for sequential conversion. The CTMU produces a constant current source used for capacitive touch button and slider decoding as well as precision time measurement.
Typical applications include battery-powered IoT sensor nodes, portable medical devices such as glucose meters and pulse oximeters, capacitive touch user interfaces for appliances and consumer electronics, real-time-clock-based data loggers, and low-power wireless sensor nodes interfacing to sub-GHz transceivers. The 20-pin DIP form factor is favored for breadboard prototyping, educational platforms, and industrial control retrofits where through-hole mounting is required.
Design consideration - XLP parts require careful attention to wake-up latency, GPIO state retention during Deep Sleep, and peripheral library configuration. Use the MPLAB X IDE with the MPLAB XC16 compiler and MPLAB Code Configurator (MCC) for fastest bring-up. For lowest sleep current, disable unused peripherals via PMD (Peripheral Module Disable) registers and use the Deep Sleep mode with DSBOR enabled. For capacitive touch applications, the CTMU requires precise timing calibration via the ADC reference - see Microchip application note AN94. Pin-compatible SOIC variants (PIC24F32KA301-I/SO) and tape-and-reel SOIC (PIC24F32KA301T-I/SO) are available for reflow assembly.
This page synthesizes distributor pricing, drop-in PIC24F32KA3xx family alternatives, and XLP-mode design notes that are not gathered in a single location in the Microchip datasheet.
Drop-in alternatives for PIC24F32KA301-I/P — 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 PIC24F32KA301-I/P (same form factor and footprint) — differing in Package, ADC, Core Architecture, Program Memory (Flash), Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F32KA301-I/SO
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC24F32KA301T-I/SO
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC24F32KA301-E/P
✅ Drop-In✓ In Stock
$2.78 / Unit
View Datasheet →PIC24F16KA301-I/P
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC24F16KA301-E/P
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC24F08KL200-I/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.16 / Unit
View Datasheet →PIC24F32KA301-I/P Maximum Ratings & Electrical Characteristics
| Program Memory (Flash) | 32 KB (11K x 24 words) |
| Data RAM | 2 KB |
| EEPROM | 512 B |
| CPU Architecture | 16-bit modified Harvard RISC |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| ADC | 12-bit, 100 ksps |
| ADC Channels | Up to 9 channels (package dependent) |
| I/O Pins | Up to 17 (package dependent) |
| Timers (16-bit) | 6 |
| PWM Modules | 4 |
| UART Modules | 3 |
| SPI Modules | 3 |
| I2C Modules | 3 |
| CTMU | Yes (Capacitive Touch + Time Measurement) |
| Package | 20-pin PDIP (0.300 inch / 7.62 mm) |
| Operating Temperature Range | -40C to +85C (Industrial -I suffix) |
| RoHS Status | Compliant |
| Mounting Type | Through-Hole (THT) |
| MSL Level | 1 (unlimited, non-moisture-sensitive for DIP) |
PIC24F32KA301-I/P Pin Configuration
| Pin 1 | RA0 — Digital I/O / analog input AN0 / CTMU input |
| Pin 2 | RA1 — Digital I/O / analog input AN1 / CTMU input |
| Pin 3 | RA2 — Digital I/O / analog input AN2 / CTMU input |
| Pin 4 | RA3 — Digital I/O / analog input AN3 / VREF+ reference input |
| Pin 5 | RA4 — Digital I/O / analog input AN4 / CTMU input |
| Pin 6 | AVDD — Analog supply voltage |
| Pin 7 | AVSS — Analog ground |
| Pin 8 | RA7 — Digital I/O / analog input AN7 / CTMU input |
| Pin 9 | RA8 — Digital I/O / analog input AN8 / CTMU input |
| Pin 10 | RA9 — Digital I/O / analog input AN9 / CTMU input |
| Pin 11 | VDD — Digital supply voltage (1.8 V to 3.6 V) |
| Pin 12 | VSS — Digital ground |
| Pin 13 | OSC1 — Crystal oscillator input or external clock |
| Pin 14 | OSC2 — Crystal oscillator output |
| Pin 15 | RB4 — Digital I/O / SDA2 I2C data (peripheral 2) |
| Pin 16 | RB5 — Digital I/O / SCL2 I2C clock (peripheral 2) |
| Pin 17 | RB6 — Digital I/O / ICP1 timer input capture |
| Pin 18 | RB7 — Digital I/O / PWM1H PWM output |
| Pin 19 | RB8 — Digital I/O / SCL1 I2C clock (peripheral 1) |
| Pin 20 | RB9 — Digital I/O / SDA1 I2C data (peripheral 1) |
Typical Applications
PIC24F32KA301-I/P is suitable for 6 applications: Battery-Powered IoT Sensor Node, Portable Medical Devices (Glucose Meter, Pulse Oximeter), Capacitive Touch User Interface, Industrial Control Retrofits and Prototyping, Real-Time Clock Data Logger, Low-Power Wireless Sensor Node (Sub-GHz Transceiver Companion).
Battery-Powered IoT Sensor Node
The PIC24F32KA301-I/P fits battery-powered IoT sensor nodes because its XLP Deep Sleep current down to 20 nA typical (with DSBOR and RTCC active) lets a sensor node run 5 to 10 years on a single CR2032 coin cell. The 32 KB Flash accommodates a LoRaWAN or BLE stack plus sensor drivers, while the 12-bit ADC with 9 channels supports multiple analog sensors (temperature, light, voltage monitoring). The 16 MIPS throughput is more than enough for periodic sensor reads every few seconds. Power-up time from Deep Sleep to Run mode is sub-200 us, enabling aggressive sleep duty cycling. The 1.8 V to 3.6 V supply range is directly compatible with 2xAA alkaline (2.0 V to 3.4 V) and single-cell LiFePO4 chemistries.
Recommended
Portable Medical Devices (Glucose Meter, Pulse Oximeter)
The PIC24F32KA301-I/P suits portable medical devices because its 12-bit ADC at 100 ksps provides sufficient resolution for photodiode sensing in pulse oximeters and electrochemical sensor bias measurement in glucose meters. The CTMU generates a precise constant current for temperature compensation and sensor excitation, and the 2 KB RAM buffers ADC sample streams without DMA. The XLP architecture delivers 100 nA Sleep with RTCC wake, ideal for bedside or wearable medical devices that spend 99 percent of their time in sleep. The 32 KB Flash range holds the medical-grade firmware plus bootloader, and the industrial -40C to +85C range covers clinical and home-use environments.
Recommended
Capacitive Touch User Interface
The PIC24F32KA301-I/P integrates Microchip's CTMU peripheral, purpose-built for capacitive touch button, slider, and wheel decoding without external touch ICs. The CTMU supplies a constant current source, and the ADC measures discharge time on each touch pad; firmware then computes touch proximity with sub-percent resolution. The 32 KB Flash holds Microchip's mTouch reference library and a custom GUI state machine, while 2 KB RAM buffers multi-touch event queues. The XLP Deep Sleep mode keeps average system current under 5 uA when no touches are active, critical for battery-powered appliances, toys, and remote controls.
Recommended
Industrial Control Retrofits and Prototyping
The PIC24F32KA301-I/P in the 20-pin PDIP package is purpose-built for industrial control retrofits and breadboard prototyping because through-hole DIP is still the dominant form factor for legacy industrial PLCs, training kits, and university lab work. The 1.8 V to 3.6 V supply range and 16 MIPS throughput handle simple PID loops, encoder reading, and relay/SSR control. The three UART modules support RS-232, RS-485, and debug console simultaneously. Microchip's MPLAB X IDE + XC16 compiler + MPLAB Code Configurator (MCC) provide free tools and a graphical pin/clock configurator that brings a new design up in under an hour.
Recommended
Real-Time Clock Data Logger
The PIC24F32KA301-I/P supports real-time-clock data logger applications because the RTCC peripheral keeps time and triggers Deep Sleep wake-up at intervals from 1 ms to years, all while consuming under 700 nA. The 32 KB Flash stores a multi-day event log with timestamp, and the 512-byte EEPROM provides a non-volatile configuration store. The 12-bit ADC at 100 ksps captures process variables (temperature, pressure, vibration) on wake, then the PIC returns to sleep. With a single CR2032, a logger sampling once per minute achieves 3 to 5 years of operation. The 16 MIPS throughput processes reservoir-sized logs faster than a typical 8-bit PIC18.
Recommended
Low-Power Wireless Sensor Node (Sub-GHz Transceiver Companion)
The PIC24F32KA301-I/P suits low-power wireless sensor nodes because it serves as the host MCU for sub-GHz transceivers such as the Microchip MRF89XA or Texas Instruments CC1101. Three UART/SPI/I2C peripherals handle simultaneous sensor I/O, transceiver configuration, and debug console. XLP Deep Sleep under 100 nA combined with the transceiver's sleep current (typically 200 nA to 2 uA) lets the entire node draw under 5 uA average. The 32 KB Flash holds a custom MAC layer or a lightweight LoRaWAN-style protocol stack. The 12-bit ADC reads the transceiver's RSSI pin for link-quality monitoring, and the 16 MIPS throughput handles AES-128 encryption for secure nodes without external crypto ICs.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F32KA301-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F32KA301-I/SO | PIC24F16KA301-I/P | PIC24F08KL200-I/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-20 (0.300 inch) | SOIC-20 (wide) | PDIP-20 (0.300 inch) - same | PDIP-20 (0.300 inch) - same |
| Program Memory (Flash) | 32 KB | 32 KB - same | 16 KB (-50%) | 8 KB (-75%) |
| Data RAM | 2 KB | 2 KB - same | 1 KB (-50%) | 1 KB (-50%) |
| EEPROM | 512 B | 512 B - same | 256 B -50% | 0 (no EEPROM) |
| Maximum CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS - same | 32 MHz / 16 MIPS - same | 32 MHz / 16 MIPS - same |
| CTMU (Capacitive Touch) | Yes | Yes | Yes | No |
| Operating Temperature | -40C to +85C (I suffix) | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same |
Key Differentiators
- Highest Flash density in 20-pin DIP PIC24F XLP family (vs PIC24F16KA301-I/P)
- Industrial temperature range with full CIP peripheral set (vs PIC24F08KL200-I/P)
- Through-hole DIP package for breadboard and legacy retrofits (vs PIC24F32KA301-I/SO)
- Includes 512-byte EEPROM for non-volatile configuration (vs PIC24F08KL200-I/P)
Design Notes
Estimated: For a typical 3.3 V VDD and 16 MIPS active, the PIC24F32KA301-I/P draws approximately 6 mA (190 uA/MHz x 16 MIPS = 3.04 mA core + peripherals). In Deep Sleep with RTCC and DSBOR enabled, current drops to approximately 20 nA typical at 2.5 V/25C. For a sensor node with 0.1 percent duty cycle (10 ms active per 10 second sleep), average current is roughly 6 uA - sufficient for 5+ years on a CR2032 (220 mAh). Always disable unused peripherals via the PMD (Peripheral Module Disable) registers to minimize active current. Reference: Microchip PIC24F32KA301 datasheet DC characteristics table and XLP section.
Place the 100 nF VDD decoupling capacitor within 3 mm of pins 11 and 12 (VDD/VSS) and the AVSS bypass (100 nF + 10 uF) within 5 mm of pins 6 and 7 (AVDD/AVSS). For DIP-20 through-hole, route the analog ground (pin 7) and digital ground (pin 12) back to a single point at the power supply ground to avoid ground-loop noise coupling into the ADC. The OSC1/OSC2 crystal traces should be short and guarded with a ground ring; if using the internal 8 MHz RC oscillator instead, leave OSC1/OSC2 floating or pulled to a defined state per datasheet.
Do not exceed the 3.6 V absolute maximum on VDD/AVDD even briefly - the PIC24F XLP is a true 3.3 V part and 5 V tolerance is NOT supported on any pin. For capacitive touch with the CTMU, calibrate the constant-current source at production temperature since CTMU current varies roughly -0.3 percent per degree C; use the ADC reference as the calibration anchor per Microchip application note AN94. When migrating firmware from PIC24F16KA301 to PIC24F32KA301 (or vice versa), verify the Flash configuration bits match - the KA301 family uses different config word addresses than the KL family.
The 12-bit ADC achieves 100 ksps throughput but ENOB (effective number of bits) drops to roughly 10.5 bits at full speed due to settling time. For precision measurements, use the ADC in a slower sampling mode or oversample and average in firmware. Reference: Microchip PIC24F32KA301 datasheet AC characteristics (ADC section). Source-impedance should be under 1 kOhm to avoid charge-sharing errors; add an external op-amp buffer if the source impedance exceeds 5 kOhm.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified (automotive grade). Industrial -I temperature range -40C to +85C; for automotive applications choose PIC24F32KA302-E/SO or PIC24F32KA304-I/PT (AEC-Q100 qualified). Lead-free and halogen-free per Microchip declaration.
