PIC24F16KL401-E/SO - 16KB Flash 32MHz XLP 16-bit MCU | Microchip
MPN: PIC24F16KL401-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.57 | $25.70 |
| 100 | $2.28 | $228.00 |
| 500 | $2.02 | $1,010.00 |
| 1,000 | $1.79 | $1,790.00 |
PIC24F16KL401-E/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, peripherals and I/O on one die. The PIC24F family is a 16-bit Modified Harvard architecture, sitting between 8-bit PIC16/PIC18 parts and 32-bit PIC32 parts in the Microchip taxonomy. It is commonly used where 16-bit math (16x16 hardware multiply), moderate memory densities and low power are needed without paying the cost of an ARM Cortex-M solution.
Key features of the PIC24F16KL401 include a 16 KB Flash program store (endurance rated to industrial levels), 1 KB SRAM and 512 B EEPROM for non-volatile data logging, a 10-bit ADC with multiple input channels, and peripheral IP carried forward from PIC18 parts for easy migration. The MSSP module supports both I²C and SPI, and CCP/ECCP provides capture, compare and PWM generation. The device operates from 1.8 V to 3.6 V (extended temperature 'E' range -40 °C to +125 °C).
The 'KL' family integrates the nanoWatt XLP energy management unit, enabling sleep currents below 1 µA with retention. The core uses a 2-cycle system clock and supports multiple oscillator modes (HFINTOSC, LFINTOSC, XT, HS, EC) for flexible clocking. An integrated temperature indicator and a 32 kHz secondary oscillator support RTC-style timing without external components.
Typical applications include low-power wireless sensor nodes (battery-powered environmental and IoT monitoring), consumer appliances and white goods, handheld battery chargers, home automation peripherals, and small medical devices such as glucometers. The combination of EEPROM, multiple timers and a flexible ADC makes the part suitable for sensor reading plus analog conditioning on-chip.
When designing with this MCU, note the 1.8 V minimum VDD and ensure the on-board voltage regulator supplies at least 1.8 V to VDD at all loads. For battery applications, take advantage of the deep-sleep modes with peripherals running from the secondary oscillator to extend battery life. The MSSP, CCP/ECCP and ADC peripherals can wake the core on stimulus, allowing the CPU to spend most of its time in sleep.
This page synthesizes XAIPART distributor pricing, drop-in same-family alternatives, application notes, and design considerations that go beyond the manufacturer datasheet.
Drop-in alternatives for PIC24F16KL401-E/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 PIC24F16KL401-E/SO (same form factor and footprint) — differing in Operating Temperature, Package, ADC, Program Memory (Flash), Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F16KL401-I/SO
✅ Drop-In✓ In Stock
$1.49 / Unit
View Datasheet →PIC24F16KL401T-I/SO
✅ Drop-In✓ In Stock
$1.72 / Unit
View Datasheet →PIC24F08KL401-E/SS
✅ Drop-In✓ In Stock
$1.69 / Unit
View Datasheet →PIC24F08KL401-I/SS
✅ Drop-In✓ In Stock
$1.6 / Unit
View Datasheet →PIC24F16KA102-E/SO
✅ Drop-In✓ In Stock
$1.58 / Unit
View Datasheet →PIC24F04KL101-E/SO
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC24F16KL401-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC® 16-bit (PIC24F) |
| Family | PIC24F KL XLP |
| Program Memory (Flash) | 16 KB (5.5K x 24 instructions) |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| ADC | 10-bit |
| Timers | Multiple 16-bit timers |
| Communication Peripherals | MSSP (I²C/SPI), UART |
| Capture/Compare/PWM | CCP/ECCP |
| Low-Power Feature | nanoWatt XLP, deep-sleep <1 µA typical |
| Package | 20-SOIC (0.295 in, 7.50 mm body width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 °C to +125 °C (extended 'E' range) |
| MSL Level | 1 (unlimited floor life at <30 °C / 85 % RH) |
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-free matte-tin lead finish) |
PIC24F16KL401-E/SO Pin Configuration
| Pin 1 | RA0/AN0 — Bidirectional I/O / analog input 0 |
| Pin 2 | RA1/AN1 — Bidirectional I/O / analog input 1 |
| Pin 3 | RB0/AN2 — Bidirectional I/O / analog input 2 |
| Pin 4 | RB1/AN3 — Bidirectional I/O / analog input 3 |
| Pin 5 | VDD — Positive supply (1.8 V to 3.6 V) |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RA2/OSCI — Bidirectional I/O / oscillator input |
| Pin 8 | RA3/OSCO — Bidirectional I/O / oscillator output |
| Pin 9 | RA4 — Bidirectional I/O |
| Pin 10 | RA5 — Bidirectional I/O |
| Pin 11 | RC0 — Bidirectional I/O |
| Pin 12 | RC1 — Bidirectional I/O |
| Pin 13 | RC2 — Bidirectional I/O |
| Pin 14 | RC3 — Bidirectional I/O |
| Pin 15 | RC4/SDA1 — Bidirectional I/O / I²C data |
| Pin 16 | RC5/SCL1 — Bidirectional I/O / I²C clock |
| Pin 17 | RB4 — Bidirectional I/O |
| Pin 18 | RB5 — Bidirectional I/O |
| Pin 19 | RB6/PGC — Bidirectional I/O / ICSP clock |
| Pin 20 | RB7/PGD — Bidirectional I/O / ICSP data |
Typical Applications
PIC24F16KL401-E/SO is suitable for 6 applications: Battery-Powered Wireless Sensor Node, Consumer Appliance Control Board, Handheld Medical / Wellness Device, Smart Home / IoT Edge Node, Industrial Sensor Transmitter, Hobby / Maker Embedded Project.
Battery-Powered Wireless Sensor Node
PIC24F16KL401's nanoWatt XLP deep-sleep current of less than 1 µA enables multi-year battery operation in remote sensor nodes. The MSSP I²C interface connects to low-power sensors (temperature, humidity, accelerometers), and the 32 MHz core wakes briefly to process measurements before returning to sleep. With 1.8-3.6 V operation, the part runs directly from a 2x AA battery pack or coin cell without a boost converter, and the 16 KB Flash fits most ZigBee/BLE MCU host bridges and LoRa SX1276 driver stacks.
Recommended
Consumer Appliance Control Board
White goods and small appliances use the PIC24F16KL401-E/SO for user interface, sensor reading and motor/PWM control. The CCP/ECCP peripheral generates the PWM waveforms used in BLDC or triac-driven motor stages, while the 10-bit ADC reads temperature sensors, current shunts and user potentiometers. The 512 B EEPROM stores calibration constants and user settings through power cycles, eliminating the need for external serial EEPROM. The 20-SOIC footprint allows hand-rework on legacy appliance boards.
Recommended
Handheld Medical / Wellness Device
Battery-powered glucometers, blood-pressure monitors and pulse oximeters use the PIC24F16KL401-E/SO to combine low-power operation, analog front-end handling and LCD/keypad scanning. The 16-bit core performs glucose curve calculations and A/D conversions of the I/V amplifier outputs, and the 1 KB SRAM holds the screen buffer for character LCD or low-cost TFT displays. The EEPROM stores user profiles, and the extended -40 to +125 °C temperature range supports harsh sterilisation environments common in clinical settings.
Recommended
Smart Home / IoT Edge Node
Home automation gateways and edge devices use the PIC24F16KL401-E/SO as a low-power host that bridges wired peripherals (MSSP I²C sensor chains, SPI displays) to wireless modules over UART. The 32 MHz core runs command interpreters, and the 16 KB Flash holds the application plus secure boot metadata. The 1.8 V minimum supply allows direct Li-Ion battery operation (3.0-4.2 V), with a low-dropout regulator on the board. Deep-sleep modes drop consumption below 1 µA when the wireless link is idle.
Recommended
Industrial Sensor Transmitter
Loop-powered 4-20 mA sensor transmitters and industrial monitoring front-ends use the PIC24F16KL401-E/SO for signal conditioning, linearisation and HART-style digital communication over UART. The 10-bit ADC reads bridge sensors, RTDs and 4-20 mA loops, while the MSSP I²C bus drives an external DAC for the analog output stage. The 1.8 V minimum supply extends battery life during power outages, and the extended -40/+125 °C range covers outdoor and process-industry environments. The 20-SOIC package is easy to conformal-coat and rework.
Recommended
Hobby / Maker Embedded Project
Hobbyists and educators adopt the PIC24F16KL401-E/SO for 20-SOIC through-hole-friendly prototyping with PICkit™ 4 or MPLAB Snap in-circuit debuggers. The 32 MHz speed and 16 KB Flash comfortably handle C code written in MPLAB X IDE with the free XC16 compiler. Standard peripherals (UART, I²C, SPI, PWM, ADC) cover most Arduino-class projects, and the SOIC package is hand-solderable on perfboard. The deep-sleep modes teach battery-aware design to students new to embedded systems.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F16KL401-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F16KL401-I/SO | PIC24F16KL401T-I/SO | PIC24F08KL401-E/SS | PIC24F08KL401-I/SS | PIC24F16KA102-E/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SOIC (7.50 mm) | 20-SOIC (7.50 mm) - same | 20-SOIC (7.50 mm) - same | 20-SOIC (7.50 mm) - same | 20-SOIC (7.50 mm) - same | 20-SOIC (7.50 mm) - same |
| Core Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash | 16 KB | 16 KB | 16 KB | 8 KB (-50%) | 8 KB (-50%) | 16 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| EEPROM | 512 B | 512 B | 512 B | 512 B | 512 B | 512 B |
| Operating Voltage | 1.8-3.6 V | 1.8-3.6 V | 1.8-3.6 V | 1.8-3.6 V | 1.8-3.6 V | 1.8-3.6 V |
| Temperature Range | -40 to +125 °C (E) | -40 to +85 °C (I) | -40 to +85 °C (I) | -40 to +125 °C (E) | -40 to +85 °C (I) | -40 to +125 °C (E) |
| Deep-Sleep Current | <1 µA (XLP) | <1 µA (XLP) | <1 µA (XLP) | <1 µA (XLP) | <1 µA (XLP) | <1.2 µA (XLP) |
Key Differentiators
- Extended industrial temperature grade (-40/+125 °C) (vs PIC24F16KL401-I/SO)
- Same silicon and toolchain as the 8 KB Flash sibling (vs PIC24F08KL401-E/SS)
- Lower power than the KA family at comparable performance (vs PIC24F16KA102-E/SO)
Design Notes
Decouple VDD with a 100 nF X7R ceramic capacitor placed within 5 mm of the VDD pin and a bulk 10 µF tantalum or ceramic capacitor on the same net. For battery applications, choose MCP1700 or MCP1640 regulators with quiescent currents below 1.6 µA so the regulator does not dominate the deep-sleep budget. The PIC24F16KL401 deep-sleep current is below 1 µA only when the MSSP, ADC and timers are properly disabled in the PMD registers.
The 20-SOIC package has a thermal pad-less footprint - all heat is dissipated through the SOIC pins. Place a copper pour under the SOIC body tied to VSS, but the small 7.50 mm body is not designed for high thermal loads; this MCU dissipates under 100 mW even at full 32 MHz activity, so no heatsink is required. Keep high-frequency traces away from the analog pins (AN0-AN3) and the OSCI/OSCO clock pins to avoid injection of digital noise into ADC measurements.
Do not confuse the 'KL' family with the 'KA' family - they share the 20-SOIC footprint but have different register maps and ADC channel assignments. Code written for PIC24F16KA301 will not run on PIC24F16KL401 without recompilation against the KL header files. Also note that the 'E' suffix denotes -40 °C to +125 °C (extended) while the 'I' suffix denotes -40 °C to +85 °C (industrial); pick the right grade for your deployment environment. Finally, MCLR reset must be pulled high through a 10 kΩ resistor - leaving it floating can cause intermittent resets.
For I²C buses longer than 5 cm or with multiple slaves, add 4.7 kΩ pull-ups on SDA1/SCL1 (pins 15 and 16) and reduce the MSSP baud rate below 400 kHz if ringing is observed on the scope. For SPI, keep the SCK trace short and route MOSI/MISO as a differential pair if the peripheral is more than 5 cm away; use 22 Ω series resistors at the source end to damp reflections. The 10-bit ADC settles within 1 µs with the recommended 1.2 kHz source impedance - do not exceed 10 kΩ source impedance or readings will degrade.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this is an industrial/extended-grade part, not an automotive grade. Lead-free matte-tin finish. Halogen-free status not explicitly stated in verified data.
