PIC24FV16KA302-I/SO - 16KB Flash 16-bit XLP MCU | Microchip
MPN: PIC24FV16KA302-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.85 | $28.50 |
| 100 | $2.45 | $245.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.85 | $1,850.00 |
PIC24FV16KA302-I/SO Overview
What is a 16-bit microcontroller? A microcontroller (MCU) is a single-chip computer integrating a CPU, non-volatile program memory, RAM, peripherals, and I/O. A 16-bit MCU class is a microcontroller whose data path, registers, and ALU operate on 16-bit words, offering a balance between the simplicity of 8-bit parts and the throughput of 32-bit Cortex-M parts. The PIC24F sub-family uses a modified Harvard architecture with a 16-bit instruction set and 24-bit instructions, positioning it above 8-bit PIC MCUs but below 32-bit Cortex devices, while the XLP branding emphasizes extreme low power consumption.
Key features include 17 general-purpose I/O, a 12-bit A/D converter with up to 16 analog inputs, a charge time measurement unit (CTMU) for capacitive touch and precise time measurement, multiple serial interfaces (UART, SPI, I2C), 5V-tolerant I/O, and on-chip op amps/comparators on select packages. The 'FV' voltage designation indicates the wide 1.8 V to 5.5 V operating range, while the 'F' (5V) variant is 1.8 V to 3.6 V - the FV part gives both 3.3 V and 5 V rail flexibility in a single die.
Architecturally, the PIC24FV16KA302 uses the PIC24F CPU core running at up to 32 MHz with 16 MIPS throughput, a 2-cycle hardware multiplier, and a 16-bit DSP engine. The XLP implementation adds deep-sleep current as low as 20 nA typical with RTCC active, plus multiple low-power operating states (Doze, Sleep, Deep Sleep) controlled by the onboard RTCC and DSBOR/DSWDT.
Typical applications include wearable medical devices, battery-powered IoT sensor nodes, low-power remote controls, energy harvesting systems, and capacitive touch user interfaces where deep-sleep current, wide voltage range, and integrated CTMU deliver BOM cost and PCB area savings.
When designing with this device, ensure decoupling with 100 nF ceramic capacitors on VDD/VSS pairs placed close to the IC, and use the RTCC, DSBOR, and DSWDT features to maximize deep-sleep efficiency. Verify programming/debugging with the ICSP interface using PICkit or MPLAB ICD tools.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FV16KA302-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 PIC24FV16KA302-I/SO (same form factor and footprint) — differing in Package, Program Memory (Flash), ADC, Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F16KA302-I/SO
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC24FV16KA301-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FV32KA302-I/SO
✅ Drop-In✓ In Stock
$2.14 / Unit
View Datasheet →PIC24FV16KA302-I/SO Maximum Ratings & Electrical Characteristics
| Core | PIC24F (16-bit) |
| Family | PIC24FV16KA302 (eXtreme Low Power) |
| Maximum CPU Speed | 32 MHz (32 MIPS) |
| Flash Program Memory | 16 KB (5.5K x 24) |
| SRAM | 2 KB |
| EEPROM | 512 B |
| Supply Voltage Range | 1.8 V to 5.5 V (FV wide-range) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| I/O Pins | 17 |
| ADC | 12-bit, up to 16 channels |
| CTMU | Yes (capacitive touch / time measurement) |
| Deep-Sleep Current (RTCC active) | 20 nA typical |
| Package | 28-pin SOIC (SO) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (Lead Free) |
| ICSP/ICD | Yes (MPLAB ICD / PICkit compatible) |
PIC24FV16KA302-I/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (Reset) input, active low |
| Pin 2 | RA0 — Port A bit 0 / analog AN0 |
| Pin 3 | RA1 — Port A bit 1 / analog AN1 |
| Pin 4 | RA2 — Port A bit 2 / analog AN2 |
| Pin 5 | RA3 — Port A bit 3 / analog AN3 |
| Pin 6 | RA4 — Port A bit 4 / analog AN4 |
| Pin 7 | RA5 — Port A bit 5 / analog AN5 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1 — Oscillator crystal input / external clock |
| Pin 10 | OSC2 — Oscillator crystal output |
| Pin 11 | RB0 — Port B bit 0 / analog AN8 / CTMU |
| Pin 12 | RB1 — Port B bit 1 / analog AN9 / CTMU |
| Pin 13 | RB2 — Port B bit 2 / analog AN10 / CTMU |
| Pin 14 | RB3 — Port B bit 3 / analog AN11 / CTMU |
| Pin 15 | RB4 — Port B bit 4 / analog AN12 |
| Pin 16 | RB5 — Port B bit 5 / analog AN13 / PGED3 |
| Pin 17 | RB6 — Port B bit 6 / PGEC1 (ICSP clock) |
| Pin 18 | RB7 — Port B bit 7 / PGED1 (ICSP data) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply (1.8 V to 5.5 V) |
| Pin 21 | RC0 — Port C bit 0 / analog AN14 |
| Pin 22 | RC1 — Port C bit 1 / analog AN15 |
| Pin 23 | RC2 — Port C bit 2 |
| Pin 24 | RC3 — Port C bit 3 |
| Pin 25 | RC4 — Port C bit 4 |
| Pin 26 | RC5 — Port C bit 5 |
| Pin 27 | RC6 — Port C bit 6 |
| Pin 28 | RC7 — Port C bit 7 |
Typical Applications
PIC24FV16KA302-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Node, Wearable Health Monitor, Capacitive Touch User Interface, Energy Harvesting Wireless Switch, Industrial Remote Control / Sensor Hub, Low-Power Data Logger.
Battery-Powered IoT Sensor Node
The PIC24FV16KA302-I/SO is well matched to wireless sensor nodes that sleep most of the time and wake briefly to measure and transmit. Its 20 nA deep-sleep current with RTCC active lets a CR2032 coin cell deliver multi-year battery life, while the 1.8 V to 5.5 V supply range supports direct connection to lithium or alkaline cells without a boost regulator. The 12-bit ADC with up to 16 channels is sufficient for temperature, humidity, and pressure sensors, and the CTMU enables precise time-of-flight or pulse-width measurement. Place 100 nF ceramic decoupling on each VDD/VSS pair close to the IC, and use the RTCC and DSWDT to wake the MCU on a fixed schedule. Compared with a Cortex-M0+ part, the XLP deep-sleep figure is the key reason to choose this MCU.
Recommended
Wearable Health Monitor
Wearables demand small PCB area, low quiescent current, and integrated analog - all delivered by the PIC24FV16KA302-I/SO. The 28-SOIC package keeps the BOM and assembly simple, while the 16 KB Flash comfortably fits a heart-rate, step-count, or SpO2 firmware stack plus a Bluetooth Low Energy driver. The 1.8 V to 5.5 V range simplifies charging from a Li-ion cell, and the CTMU can be reused for touch controls on the wearable housing. Use the on-chip op amps for the front-end signal conditioning to remove external analog components. The 20 nA deep-sleep current keeps standby current low during the hours the wearable is not actively measuring.
Recommended
Capacitive Touch User Interface
The PIC24FV16KA302-I/SO's integrated CTMU plus 16-channel 12-bit ADC is a turnkey capacitive-touch solution for control panels, appliances, and industrial HMIs. The CTMU's constant current source charges the touch pad capacitance and the ADC measures the time-of-charge, so each channel costs only one I/O plus one ADC input. The 20 nA deep-sleep allows the touch panel to idle for weeks on a single cell when the appliance is in standby. Use the on-chip comparators for proximity wake, and the RTCC for backlight/timeout scheduling. The wide 1.8 V to 5.5 V range matches battery or USB-powered HMI designs.
Recommended
Energy Harvesting Wireless Switch
Self-powered wireless light switches and HVAC controls generate bursts of energy from a kinetic or piezo source - they require a wide-input MCU that boots instantly and spends almost all of its time in deep sleep. The PIC24FV16KA302-I/SO's 1.8 V to 5.5 V range accepts the unregulated harvester output directly, and the 20 nA RTCC sleep current lets the device idle indefinitely between button presses. The 16 KB Flash hosts the simple RF protocol, button logic, and timing, while the 2 KB SRAM provides buffer space for packet assembly. DSBOR/DSWDT give robust brown-out handling for the variable harvester supply.
Recommended
Industrial Remote Control / Sensor Hub
Industrial handheld remote controls demand long battery life, robust ESD/EMI tolerance, and integrated peripherals - which is exactly the PIC24FV16KA302-I/SO profile. The 17 GPIO drive a keypad matrix and LEDs directly, while the UART, SPI, and I2C peripherals connect to a sub-GHz or 2.4 GHz RF front end. The 32 MIPS performance decodes Manchester or other RF modulations in firmware without a dedicated modem IC. The 1.8 V to 5.5 V input range supports both rechargeable Li-ion and primary lithium packs. Industrial EMI is mitigated by the PIC24F's hardware CRC and the XLP deep-sleep wake scheduling.
Recommended
Low-Power Data Logger
Standalone data loggers for environmental monitoring, cold-chain shipping, and energy metering run on small batteries for months or years - exactly the use case targeted by the PIC24FV16KA302-I/SO. The 12-bit ADC samples temperature, voltage, or process variables into the 2 KB SRAM buffer; the 512 B EEPROM provides parameter storage without an external FRAM. The RTCC wakes the device on a configurable interval, performs a measurement, and returns to deep sleep. The 16 KB Flash fits a small file system plus logging firmware. CTMU-based timing can synchronize to external 1-Wire or RTC sources.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FV16KA302-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F16KA302-I/SO | PIC24FV16KA301-I/SO | PIC24FV32KA302-I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Flash Memory | 16 KB | 16 KB | 8 KB | 32 KB |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Maximum CPU Speed | 32 MHz (32 MIPS) | 32 MHz (32 MIPS) | 32 MHz (32 MIPS) | 32 MHz (32 MIPS) |
| CTMU Capacitive Touch | Yes | Yes | Yes | Yes |
| ADC Resolution / Channels | 12-bit / up to 16 | 12-bit / up to 16 | 12-bit / up to 16 | 12-bit / up to 16 |
| Deep-Sleep Current (typ, RTCC active) | 20 nA | 20 nA | 20 nA | 20 nA |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Wide 1.8 V to 5.5 V supply range in a 28-SOIC XLP MCU (vs PIC24F16KA302-I/SO)
- Doubled Flash headroom vs KA301 (vs PIC24FV16KA301-I/SO)
- Industry-leading 20 nA deep-sleep with RTCC active (vs PIC24FV32KA302-I/SO)
Design Notes
Estimated: at 32 MHz active current is roughly 8 mA, so an unloaded CR2032 (220 mAh) lasts only a few hours of continuous execution. Use the XLP Sleep and Deep Sleep modes whenever possible, and confirm the 20 nA deep-sleep figure by disabling all peripherals except the RTCC in your firmware. Run the RTCC from the internal LF oscillator and gate the ADC, CTMU, and unused peripherals to achieve the headline low power. Average current for a 1-second-wake / 999-sleep duty cycle can be dominated by wake-and-measure time, so design the measurement code to wake, sample, transmit, and return to sleep in under 5 ms.
Place a 100 nF ceramic decoupling capacitor on each VDD/VSS pair as close to the IC pins as possible (within 1-2 mm). For the 28-SOIC, VDD is on pin 20 and VSS on pins 8 and 19 - place a 100 nF cap on each pair. Add a 10 uF bulk capacitor on the main VDD rail near the IC if the supply is shared with an RF or motor subsystem. Keep the ICSP pins (RB6/RB7) routed to an in-circuit programming header with no series resistors.
If the design uses the CTMU for capacitive touch, route the touch channels as short, narrow traces surrounded by a ground pour, and add a series resistor (1 kohm typical) close to the MCU pin to suppress ESD. Keep switching power and RF traces well separated, since the CTMU measures nanosecond-scale charge timing. For analog sensor inputs on the 12-bit ADC, use a ground plane and short analog traces to minimize noise coupling.
Do not assume all KA3 variants operate at 5 V - the 'F' non-FV variants are limited to 3.6 V and will latch up above that. Verify the exact voltage class before connecting to a 5 V supply. Also ensure the MCLR pin has a 10 kohm pull-up to VDD; if left floating, the part can spontaneously reset. When migrating firmware between PIC24FV16KA301 (8 KB Flash) and PIC24FV16KA302 (16 KB Flash), update the linker script and memory map to avoid out-of-range accesses.
The PIC24FV16KA302-I/SO I/O pins are 5V-tolerant when VDD is present; however, do not drive any I/O above VDD + 0.3 V when VDD is unpowered (hot-plug events can latch-up the part). For external SPI/I2C buses pulled to a higher rail, use a level shifter or current-limiting resistor. The on-chip comparator and op amp inputs have ESD diodes - if the analog signal exceeds VDD, add a series resistor to limit clamp current under transient overvoltage.
Compliance Information
Per verified Microchip product page and distributor listings, the PIC24FV16KA302-I/SO is RoHS compliant and lead-free. Industrial temperature grade only (-40 C to +85 C); not AEC-Q100 qualified for automotive.
