PIC24F16KL401T-I/SO - 16KB Flash 32MHz 16-bit MCU | Microchip
MPN: PIC24F16KL401T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.21 | $221.00 |
| 500 | $1.94 | $970.00 |
| 1,000 | $1.72 | $1,720.00 |
PIC24F16KL401T-I/SO Overview
A 16-bit PIC microcontroller is a member of the broader microcontroller (MCU) category of single-chip microcomputers, which sit within the embedded systems hierarchy: MCU -> microcontroller -> embedded processor -> semiconductor device. The PIC24F KL sub-family specifically targets applications that benefit from a 16-bit modified-Harvard core with low-power nanoWatt XLP sleep currents below 1 uA typical, allowing battery-powered end products to extend operational life. The KL line preserves PIC18 peripheral compatibility so that existing PIC18 firmware and toolchains can be migrated upward with minimal disruption.
Key features include 16KB (5.5K x 24) Flash program memory, 1KB SRAM, 17 I/O pins, multiple low-power sleep modes including Sleep, Idle, and Deep Sleep, integrated RTCC and WDT, and CTMU support for capacitive touch sensing. The 20-SOIC footprint is industry-standard and compatible with hand-soldering and reflow profiles for JEDEC J-STD-020 MSL-1 moisture sensitivity.
The PIC24F16KL401 uses a modified-Harvard 16-bit core running up to 32 MHz delivering approximately 16 MIPS of computational throughput, with a 3-stage pipeline and hardware multiply/divide. nanoWatt XLP technology implements selective peripheral clock gating and multiple oscillator options (HFINTOSC, LFINTOSC, SOSC) so that peripherals can be disabled individually and the core clock can be switched off in sleep.
Typical applications include low-cost consumer appliances, battery-powered sensor nodes, IoT edge devices, general-purpose 16-bit upgrades of legacy PIC18 designs, and small home automation or lighting controllers. The 32 MHz speed and 16-bit core deliver enough headroom for protocol stacks such as Modbus RTU over UART, I2C sensor aggregation, or simple graphical user interfaces driving segmented LCDs.
When designing with this MCU, allocate the analog-capable I/O pins carefully because pin remapping is limited on 20-pin SOIC variants. Use the internal HFINTOSC at startup to keep the BOM minimal and switch to a higher-accuracy source only if UART timing requires it. Apply the standard 100 nF VDD decoupling near each power pin and follow Microchip AN1267 power-supply layout guidance for nanoWatt XLP parts.
This page synthesizes distributor pricing, drop-in same-package alternatives, and design notes drawn from the Microchip datasheet family, providing information that complements but does not replace the manufacturer datasheet.
Drop-in alternatives for PIC24F16KL401T-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 PIC24F16KL401T-I/SO (same form factor and footprint) — differing in Operating Temperature, Package, ADC, Core Architecture, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F16KL401-I/SO
✅ Drop-In✓ In Stock
$1.49 / Unit
View Datasheet →PIC24F16KL401-E/SO
✅ Drop-In✓ In Stock
$1.79 / Unit
View Datasheet →PIC24F16KL401T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit PIC24F (modified Harvard) |
| Family | PIC24F KL family (XLP nanoWatt) |
| Maximum CPU Speed | 32 MHz |
| Program Memory (Flash) | 16 KB (5.5K x 24) |
| Data RAM | 1 KB |
| Data EEPROM | 0 B (none on this part) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 17 |
| ADC | 10-bit, up to 17 channels |
| DAC | 5-bit (1 channel) |
| Timers | 5 x 16-bit / 32-bit timer modules |
| Communication Peripherals | 1 x I2C/SPI (MSSP), 1 x UART |
| PWM Modules | 1 x CCP / ECCP |
| Operating Temperature | -40C to +85C (industrial, -I suffix) |
| Package | 20-pin SOIC (7.50 mm / 300 mil) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (per JEDEC J-STD-020) |
| Packaging | Tape & Reel (T suffix) |
| RoHS Status | Compliant |
PIC24F16KL401T-I/SO Pin Configuration
| Pin 1 | RA0/AN0/CVD — Digital I/O / analog input 0 / capacitive touch |
| Pin 2 | RA1/AN1/CVD — Digital I/O / analog input 1 / capacitive touch |
| Pin 3 | RA2/AN2/CVD — Digital I/O / analog input 2 / capacitive touch |
| Pin 4 | RA3/AN3/CVD — Digital I/O / analog input 3 / capacitive touch |
| Pin 5 | RA4/AN4 — Digital I/O / analog input 4 (open-drain option) |
| Pin 6 | RA5/AN5 — Digital I/O / analog input 5 |
| Pin 7 | RA6/OSC2/CLKO — Digital I/O / crystal oscillator output |
| Pin 8 | RA7/OSC1/CLKI — Digital I/O / crystal oscillator input |
| Pin 9 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RB0/AN8/CVD — Digital I/O / analog input 8 / capacitive touch |
| Pin 12 | RB1/AN9/CVD — Digital I/O / analog input 9 / capacitive touch |
| Pin 13 | RB2/AN10/CVD — Digital I/O / analog input 10 / capacitive touch |
| Pin 14 | RB3/AN11/CVD — Digital I/O / analog input 11 / capacitive touch |
| Pin 15 | RB4/AN12 — Digital I/O / analog input 12 |
| Pin 16 | RB5/AN13 — Digital I/O / analog input 13 |
| Pin 17 | RB6/AN14/PGC — Digital I/O / analog input 14 / ICSP clock |
| Pin 18 | RB7/AN15/PGD — Digital I/O / analog input 15 / ICSP data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage (1.8V to 3.6V) |
Typical Applications
PIC24F16KL401T-I/SO is suitable for 7 applications: Battery-Powered IoT Sensor Node, Cost-Sensitive Consumer Appliance Controller, PIC18 to PIC24 Migration Platform, Home Automation Sensor / Lighting Controller, Capacitive Touch User Interface, Industrial Sensor Transmitter, Low-Cost General Purpose 16-bit MCU Module.
Battery-Powered IoT Sensor Node
The PIC24F16KL401T-I/SO is well suited for battery-powered IoT sensor nodes where deep sleep current and 1.8V minimum supply voltage directly determine field life. With sub-microampere Deep Sleep current via nanoWatt XLP and 16KB Flash, the MCU can wake on RTCC, sample a sensor via I2C using the MSSP peripheral, and transmit over a UART-connected radio module before returning to sleep - all on two AA cells.
Recommended
Cost-Sensitive Consumer Appliance Controller
For consumer appliances where every cent of BOM matters, the PIC24F16KL401T-I/SO delivers 32 MHz 16-bit performance, 17 I/O, and 10-bit ADC at sub-3 USD pricing. The MCU can drive triac-controlled heater elements via ECCP PWM, read NTC thermistors through the ADC, and interface to user buttons and 7-segment LED displays through GPIOs - all without external glue logic.
Recommended
PIC18 to PIC24 Migration Platform
The PIC24F KL family retains PIC18 peripheral compatibility for MSSP (I2C/SPI), CCP, and ADC, making the PIC24F16KL401T-I/SO a low-friction migration target for designers moving from 8-bit PIC18F designs. The 16-bit modified-Harvard core, 16KB Flash, and identical peripheral register layout allow existing PIC18 code bases to be recompiled for the KL401 with minimal porting effort.
Recommended
Home Automation Sensor / Lighting Controller
For residential lighting controls and occupancy sensors, the PIC24F16KL401T-I/SO provides CCP PWM to drive LED drivers, 10-bit ADC for ambient light sensing, and UART for wired or wireless module connectivity. Its 1.8V to 3.6V supply range allows direct 3.3V or 2x AA battery operation, while nanoWatt XLP sleep modes enable wall-switch designs with multi-year battery life.
Recommended
Capacitive Touch User Interface
The CTMU peripheral on the PIC24F16KL401T-I/SO enables capacitive touch sensing on up to 17 channels without external touch ICs. Designers can implement buttons, sliders, or proximity sensors for white goods or consumer electronics by routing copper pads directly to ADC-capable pins and using Microchip's CTMU firmware libraries, eliminating dedicated touch controllers and reducing system cost.
Recommended
Industrial Sensor Transmitter
For 4-20 mA industrial sensor transmitters and field instrumentation, the PIC24F16KL401T-I/SO provides the 10-bit ADC, RTCC for time-stamped measurements, MSSP for digital calibration interfaces, and UART for HART or Modbus communication. Its industrial -40C to +85C range and 1.8V minimum supply allow operation from loop-powered 24V supplies with simple linear regulators.
Recommended
Low-Cost General Purpose 16-bit MCU Module
The PIC24F16KL401T-I/SO is frequently used as the controller on small 16-bit MCU modules and breakout boards targeted at makers, education, and prototype development. The 20-SOIC package is hand-solderable and breadboard-friendly through SOIC-to-DIP adapters, while the PICkit or Snap debugger provides low-cost in-circuit programming for rapid iteration.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F16KL401T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F16KL401-I/SO | PIC24F16KL401-E/SO | PIC24F16KL401T-I/SS |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SOIC (7.50 mm) | 20-pin SOIC (7.50 mm) | 20-pin SOIC (7.50 mm) | 20-pin SSOP (different footprint) |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +85C (industrial) |
| Packaging Form | Tape & Reel | Tube | Tube (E suffix) | Tape & Reel (SSOP body) |
| AEC-Q100 Qualified | No (industrial grade) | No | No (extended industrial, not automotive) | No |
Key Differentiators
- Industrial-grade operating range with same die across temperature grades (vs PIC24F16KL401-E/SO)
- Production-line optimized Tape & Reel packaging (vs PIC24F16KL401-I/SO)
- Same PIC24F KL silicon footprint in a smaller body style (vs PIC24F16KL401T-I/SS)
Design Notes
Apply Microchip's recommended decoupling scheme: place a 100 nF ceramic decoupling capacitor within 3 mm of each VDD pin (pin 9 and pin 20), and add a bulk 4.7 uF to 10 uF tantalum or ceramic capacitor on the VDD rail. For nanoWatt XLP Deep Sleep current measurements, ground all unused I/O and configure them as digital outputs to prevent floating CMOS inputs from increasing leakage.
Keep the analog AVdd path separate from the digital Vdd path when possible, joining them at a single point near the regulator output. Place the 32.768 kHz watch crystal (SOSC pins) as close as possible to the SOSCI/SOSCO pads with short traces and a grounded guard ring to minimize leakage current that would otherwise inflate the Deep Sleep power budget.
Do not assume the PIC24F16KL401 is code-compatible with PIC24F16KA-family parts - the peripheral Special Function Register (SFR) layout differs between the KL and KA sub-families even though both occupy the same 20-pin SOIC footprint. Also, the device does not contain data EEPROM; use the Microchip EEPROM-emulation library or an external I2C EEPROM such as 24LC256 if non-volatile parameter storage is required.
Compliance Information
Per the Microchip PIC24F16KL401 product page, the SOIC package is lead-free and RoHS compliant. The -I suffix indicates industrial temperature grade and is NOT AEC-Q100 qualified; AEC-Q100 qualified automotive variants use a different ordering code suffix per Microchip's product family nomenclature.
