PIC24F16KL402-I/ML - 16KB Flash 16-bit MCU XLP 28-QFN | Microchip
MPN: PIC24F16KL402-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.18 | $2.18 |
| 10 | $1.95 | $19.50 |
| 100 | $1.62 | $162.00 |
| 500 | $1.38 | $690.00 |
| 1,000 | $1.21 | $1,210.00 |
PIC24F16KL402-I/ML Overview
A 16-bit microcontroller (MCU) is an embedded processor that executes instructions on a 16-bit-wide data path, striking a balance between 8-bit devices (low cost, simple peripherals) and 32-bit devices (high performance, complex ecosystems). Within the broader taxonomy, the PIC24F16KL402 sits in the microcontroller -> embedded processor -> integrated circuit -> semiconductor chain, and within Microchip's portfolio it belongs to the PIC24F16KL40x family of XLP (eXtreme Low Power) MCUs optimized for battery-powered and energy-harvesting designs.
Key features include a wide operating voltage range of 1.8V to 3.6V, 17 general-purpose I/O pins, a 10-bit ADC with up to 12 channels, four 16-bit timers, and ultra-low-power sleep modes that draw as little as 30 nA in Deep Sleep. The 28-QFN package offers a compact 6x6 mm footprint and a thermal pad for improved heat dissipation, suitable for space-constrained PCB designs. The nanoWatt XLP architecture integrates multiple power-saving modes (Doze, Idle, Sleep, Deep Sleep) and a hardware Real-Time Clock/Calendar for unattended operation.
The PIC24F16KL402 uses a modified Harvard 16-bit core with single-cycle hardware multiply and divide, eliminating the bottleneck of software emulation common in 8-bit cores. Its peripheral set includes Capture/Compare/PWM (CCP/ECCP), Master Synchronous Serial Port (MSSP) configurable for SPI or I2C, UART, a 10-bit ADC, and comparators. The architecture supports in-circuit serial programming (ICSP) and in-circuit debugging via two debug pins.
Typical applications include battery-powered sensor nodes, wearable health monitors, low-cost consumer electronics, IoT edge devices, and cost-sensitive industrial controls. The combination of 16-bit throughput, generous memory, and nanoWatt XLP power efficiency makes it well-suited for designs migrating from PIC18F where more MIPS or RAM are required without abandoning the familiar peripheral set. When designing with this device, ensure decoupling capacitors are placed close to VDD/VSS pairs and that the ICSP/ICD pins are routed to a programming header for in-circuit debug access during prototyping.
Drop-in alternatives for PIC24F16KL402-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 PIC24F16KL402-I/ML (same form factor and footprint) — differing in ADC, Package, Core Architecture, Timers, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F16KL401-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24F08KL402-I/ML
✅ Drop-In✓ In Stock
$1.25 / Unit
View Datasheet →PIC24F16KL402T-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24F16KA102-I/ML
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC24F16KL402-E/ML
✅ Drop-In✓ In Stock
$1.65 / Unit
View Datasheet →PIC24F16KA102T-I/ML
✅ Drop-In✓ In Stock
$1.71 / Unit
View Datasheet →PIC24F16KL402-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit Modified Harvard |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Program Memory (Flash) | 16 KB |
| Data Memory (SRAM) | 1 KB |
| Data EEPROM | 512 bytes |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 17 |
| ADC | 10-bit, up to 12 channels |
| Timers | 4 x 16-bit |
| Serial Interfaces | 1 x MSSP (I2C/SPI), 1 x UART |
| CCP/ECCP Modules | 2 (1 CCP + 1 ECCP) |
| Low-Power Technology | nanoWatt XLP (Deep Sleep ~30 nA typical) |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package | 28-pin QFN (6x6 mm) with thermal pad |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Debug Interface | ICSP / ICD 2-wire |
PIC24F16KL402-I/ML Pin Configuration
| Pin 1 | RA0 — I/O port A bit 0 / analog input |
| Pin 2 | RA1 — I/O port A bit 1 / analog input |
| Pin 3 | RA2 — I/O port A bit 2 / analog input |
| Pin 4 | RA3 — I/O port A bit 3 / analog input |
| Pin 5 | RA4 — I/O port A bit 4 |
| Pin 6 | RA5 — I/O port A bit 5 |
| Pin 7 | RA6 — I/O port A bit 6 |
| Pin 8 | RA7 — I/O port A bit 7 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage 1.8-3.6V |
| Pin 11 | RB0 — I/O port B bit 0 / analog input / interrupt-on-change |
| Pin 12 | RB1 — I/O port B bit 1 / analog input / interrupt-on-change |
| Pin 13 | RB2 — I/O port B bit 2 / analog input / interrupt-on-change |
| Pin 14 | RB3 — I/O port B bit 3 / analog input / interrupt-on-change |
| Pin 15 | RB4 — I/O port B bit 4 / interrupt-on-change |
| Pin 16 | RB5 — I/O port B bit 5 / interrupt-on-change |
| Pin 17 | RB6 — I/O port B bit 6 / ICSP PGEC programming clock |
| Pin 18 | RB7 — I/O port B bit 7 / ICSP PGED programming data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage 1.8-3.6V |
| Pin 21 | RC0 — I/O port C bit 0 |
| Pin 22 | RC1 — I/O port C bit 1 |
| Pin 23 | RC2 — I/O port C bit 2 / analog input |
| Pin 24 | RC3 — I/O port C bit 3 / analog input |
| Pin 25 | RC4 — I/O port C bit 4 / analog input |
| Pin 26 | RC5 — I/O port C bit 5 / analog input |
| Pin 27 | RC6 — I/O port C bit 6 |
| Pin 28 | RC7 — I/O port C bit 7 |
| Pin 29 | EP — Exposed thermal pad (center) - tie to VSS for thermal dissipation |
Typical Applications
PIC24F16KL402-I/ML is suitable for 7 applications: Battery-Powered IoT Sensor Nodes, Wearable Health Monitors, Cost-Sensitive Consumer Electronics, Industrial Control and Sensing, Low-Cost Motor Control (PWM Fans, Pumps), Energy Harvesting Wireless Sensor Transmitters, Smart Home Edge Devices.
Battery-Powered IoT Sensor Nodes
The PIC24F16KL402-I/ML is well-matched to coin-cell powered IoT sensor nodes because its nanoWatt XLP technology delivers approximately 30 nA Deep Sleep current, preserving battery life across multi-year deployments. The 1.8V-3.6V supply range directly supports 2xAA alkaline and CR2032 lithium chemistries without boost regulation. The 10-bit ADC with up to 12 channels digitizes temperature, humidity, and analog sensor outputs, while the MSSP provides I2C/SPI for digital sensors like accelerometers. Local 16 MIPS processing handles edge analytics (threshold checks, FFT) before waking the radio, reducing TX duty cycle.
Recommended
Wearable Health Monitors
Wearable health monitors benefit from the PIC24F16KL402-I/ML's 28-QFN (6x6 mm) compact footprint, which fits wristband and patch form factors. The 16 MIPS performance drives heart-rate algorithm preprocessing, step counting, and SpO2 calculation in real time while the 1 KB SRAM buffers raw sensor data before Bluetooth transmission. The 10-bit ADC pairs with PPG/heart-rate sensor analog front ends, and CCP/ECCP modules generate PWM to drive haptic feedback or LED biasing. Industrial -40 to +85 C rating tolerates body-temperature and skin-contact thermal stress.
Recommended
Cost-Sensitive Consumer Electronics
The PIC24F16KL402-I/ML targets cost-sensitive consumer devices such as remote controls, toys, small appliances, and low-end white goods, where its 16-bit performance exceeds typical 8-bit PIC18 competitors at comparable price. The MSSP I2C/SPI bus connects to EEPROM, LED drivers, and display controllers, while UART interfaces with wireless modules (sub-GHz transceivers, BLE bridges). The wide 1.8-3.6V supply allows direct operation from 2xAA or single Li-ion cells, simplifying BOM. The 16 KB Flash accommodates feature-rich user interfaces with LCD segment driving and capacitive touch via CTMU.
Recommended
Industrial Control and Sensing
Factory automation modules and process-sensing instruments benefit from the PIC24F16KL402-I/ML's industrial -40 to +85 C rating and on-chip peripherals for sensor aggregation and actuator control. The 10-bit ADC reads 4-20 mA loop signals via a shunt resistor, while ECCP generates PWM for motor speed control, valve positioning, or heater regulation. MSSP I2C links to digital temperature, pressure, and flow sensors on the same bus. The 17 GPIO lines accommodate keypad scanning, status LEDs, and relay drive outputs without external logic. ICSP/ICD enables in-circuit firmware update during commissioning.
Recommended
Low-Cost Motor Control (PWM Fans, Pumps)
The PIC24F16KL402-I/ML drives low-cost BLDC, brushed DC, and stepper motors in fan, pump, and small-appliance applications using its ECCP module's enhanced PWM with complementary outputs, dead-band control, and fault shutdown. The 32 MHz CPU executes field-oriented control (FOC) loops at adequate update rates for sub-100W motors. The 10-bit ADC samples back-EMF and current-sense amplifiers, while the comparator provides hardware overcurrent protection. The wide operating voltage supports 3.3V logic-level half-bridge drivers directly from 2S Li-ion battery packs.
Recommended
Energy Harvesting Wireless Sensor Transmitters
Energy-harvesting wireless sensor transmitters leverage the PIC24F16KL402-I/ML's 30 nA Deep Sleep mode to operate from indoor photovoltaic, thermoelectric, or vibration harvesters. The internal RTCC and ultra-low-power timer keep time-stamping accuracy while drawing minimal current, enabling event-driven wake-up. The MSSP SPI interfaces with sub-GHz RFICs like the Microchip MRF89XA for wireless telemetry. The wide 1.8-3.6V range accommodates supercapacitor-buffered energy storage without additional boost converters, simplifying BOM to MCU + sensor + radio.
Recommended
Smart Home Edge Devices
Smart home edge devices (PIR motion sensors, door/window contacts, smart switches, thermostats) deploy the PIC24F16KL402-I/ML for its combination of XLP low power and adequate 16 MIPS headroom to run Zigbee/BLE stack fragments or LoRaWAN MAC. The 17 GPIO routes directly to relay drivers, triac interfaces, and pushbuttons; MSSP I2C connects to sensors and EEPROM for state retention; ECCP controls dimmer triac phase-angle firing. The 28-QFN footprint plus integrated peripheral set eliminate external logic, fitting single-board designs under USD 5 BOM.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F16KL402-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F16KL401-I/ML | PIC24F08KL402-I/ML | PIC24F16KA102-I/ML | PIC24F16KL402-E/ML |
|---|---|---|---|---|---|
| Package | 28-QFN (6x6 mm) | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Program Memory | 16 KB | 8 KB | 8 KB | 16 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Maximum CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| Operating Voltage Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) |
| Low-Power Technology | nanoWatt XLP (~30 nA Deep Sleep) | nanoWalt XLP (~30 nA) | nanoWatt XLP (~30 nA) | Earlier KA-series (~50-100 nA) | nanoWatt XLP (~30 nA) |
| ECCP Module | Yes | Yes | Yes | No (CCP only) | Yes |
| Unit Price (qty 1) | USD 2.18 | USD 1.95 (estimate) | USD 1.85 (estimate) | USD 1.90 (estimate) | USD 2.60 |
Key Differentiators
- nanoWatt XLP technology with 30 nA Deep Sleep (vs PIC24F16KA102-I/ML)
- Higher Flash density in same package (vs PIC24F16KL401-I/ML)
- Industrial vs Extended temperature grades (vs PIC24F16KL402-E/ML)
Design Notes
The PIC24F16KL402-I/ML's nanoWatt XLP technology requires careful Sleep mode management to achieve the 30 nA Deep Sleep floor. Estimated: at VDD=3.0V and 25 C ambient, leaving any unused peripheral clock enabled typically adds 5-15 uA. Always disable unused peripherals in firmware before entering Deep Sleep via the PMDx registers, and configure the RTCC with external 32.768 kHz crystal for time-keeping during long sleep windows.
Place two 100 nF decoupling capacitors as close as possible to the VDD/VSS pin pairs (pins 10/9 and 20/19). Add a single 4.7 uF bulk capacitor within 10 mm of the MCU. The QFN exposed thermal pad (EP) MUST be soldered to a copper pad connected to VSS for both thermal dissipation and ground return - using thermal vias under the pad improves heat flow by 30-50%. Keep the ICSP/PGEC/PGED traces (RB6/RB7) short and isolated from switching nodes.
Estimated: programming failures on first prototype boards usually trace to three issues - missing 100 nF decoupling (causes voltage droops during Flash erase), floating MCLR pin (causes spurious resets; MCLR must be tied to VDD via 10 kOhm pull-up), or incorrect ICSP header wiring. Always include a 6-pin ICSP header (PGEC, PGED, VDD, VSS, MCLR, NC) on prototype boards. The PIC24F16KL402 will NOT enter programming mode if VDD falls below 1.8V during the PGECx clock handshake.
Compliance Information
RoHS compliant per Microchip product page. PIC24F16KL402-I/ML is not AEC-Q100 qualified; for automotive, contact Microchip about Q-graded variants. Lead-free and halogen-free per Microchip environmental compliance.
