PIC24F16KL401-I/SO - 16KB Flash 32MHz XLP MCU 20-SOIC | Microchip
MPN: PIC24F16KL401-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.21 | $22.10 |
| 100 | $1.95 | $195.00 |
| 500 | $1.72 | $860.00 |
| 1,000 | $1.49 | $1,490.00 |
PIC24F16KL401-I/SO Overview
A microcontroller (MCU) is a single-chip computer that combines a CPU, non-volatile program memory (Flash), working RAM, peripherals such as timers, ADCs, and serial interfaces, and interrupt logic into one device. The PIC24F family sits in Microchip's 16-bit MCU hierarchy (8-bit PIC16/PIC18 -> 16-bit PIC24F -> 32-bit PIC32), offering higher throughput than 8-bit parts while preserving the PIC ecosystem's ease of use. The KL sub-family is the entry-level 16-bit tier designed for low-cost migration from PIC18 designs, sharing similar peripheral set names (MSSP, CCP/ECCP) for code portability.
Key features include 16KB Flash (5.5K x 24 words), 1KB SRAM, a 10-bit ADC with up to 12 channels, three 16-bit timers, two CCP and one ECCP module, two UART, one MSSP (I²C/SPI selectable), nanoWatt XLP sleep currents in the nanoamp range, and an internal 8MHz oscillator with PLL options. The wide 1.8V–3.6V operating range and ultra-low-power modes (Sleep, Deep Sleep, Idle, Doze) make it well-suited for battery-powered and energy-harvesting systems where quiescent current dominates battery life.
Typical applications include consumer appliances, home automation sensor nodes, low-cost remote controls, portable medical accessories, industrial sensor interface modules, LED lighting controllers, and battery-operated IoT edge nodes. The integrated 10-bit ADC and PWM/ECCP peripherals reduce BOM cost by eliminating external signal-conditioning and motor-control components. Engineers migrating from PIC18 to 16-bit performance gain CPU headroom without retraining on a new toolchain.
When designing with this device, place a 100 nF decoupling capacitor directly at each VDD pin and a bulk 10 µF tantalum at the board-level supply rail, keep analog traces short and away from switching nodes, and use the device's ICSP™ pins for both in-circuit programming and debugging to keep prototypes field-upgradeable.
Drop-in alternatives for PIC24F16KL401-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 PIC24F16KL401-I/SO (same form factor and footprint) — differing in Package, Core Architecture, MSL Level, Operating Temperature, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F16KL401T-I/SO
✅ Drop-In✓ In Stock
$1.72 / Unit
View Datasheet →PIC24F16KA301T-I/SO
✅ Drop-In✓ In Stock
$1.48 / Unit
View Datasheet →PIC24F16KL401-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit PIC24F (MIPS) |
| CPU Speed | 32 MHz (16 MIPS) |
| Program Memory (Flash) | 16 KB (5.5K x 24 words) |
| Data Memory (SRAM) | 1 KB |
| Operating Voltage Range | 1.8 V to 3.6 V |
| ADC | 10-bit, up to 12 channels |
| I/O Pins | Up to 18 |
| Timers | 3 x 16-bit |
| CCP/ECCP Modules | 2 CCP + 1 ECCP |
| MSSP | 1 (I²C / SPI) |
| UART | 2 |
| Low-Power Modes | nanoWatt XLP: Sleep, Deep Sleep, Idle, Doze |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| Package | 20-pin SOIC (SO) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
| Halogen Free | Compliant (per cross-reference listing) |
| Programming/Debug | ICSP™ (In-Circuit Serial Programming) |
PIC24F16KL401-I/SO Pin Configuration
| Pin 1 | RA0 — I/O / analog input |
| Pin 2 | RA1 — I/O / analog input |
| Pin 3 | RA2 — I/O / analog input |
| Pin 4 | RA3 — I/O / analog input |
| Pin 5 | RA4 — I/O / analog input |
| Pin 6 | RA5 — I/O / analog input |
| Pin 7 | RA6 — I/O / analog input |
| Pin 8 | RA7 — I/O / analog input |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | RB0 — I/O / INT |
| Pin 12 | RB1 — I/O |
| Pin 13 | RB2 — I/O |
| Pin 14 | RB3 — I/O |
| Pin 15 | RB4 — I/O |
| Pin 16 | RB5 — I/O |
| Pin 17 | RB6 — I/O / ICSPCLK |
| Pin 18 | RB7 — I/O / ICSPDAT |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
Typical Applications
PIC24F16KL401-I/SO is suitable for 7 applications: Battery-Powered IoT Sensor Node, Consumer Appliance Control, LED Lighting and Dimming Controller, Home Automation Sensor Hub, Portable Medical Accessory, Industrial Sensor Interface Module, Low-Cost Remote Control / HMI.
Battery-Powered IoT Sensor Node
The PIC24F16KL401-I/SO suits battery-powered IoT sensor nodes where quiescent current dominates battery life. Its nanoWatt XLP Deep Sleep currents in the nanoamp range, combined with a 10-bit ADC for sensor readout and UART/MSSP for connectivity, let the node spend most of its life asleep and wake only to measure and transmit. Operating from 1.8V to 3.6V supports direct use of 2xAA alkaline or single-cell Li-ion chemistries, eliminating an extra power stage and reducing BOM cost in low-duty-cycle edge deployments.
Recommended
Consumer Appliance Control
In consumer appliances (coffee makers, fans, small kitchen devices), the PIC24F16KL401-I/SO provides 16 MIPS throughput, PWM for motor/valve control via ECCP, and a 10-bit ADC for thermistor or potentiometer feedback. The 20-SOIC package keeps assembly costs low on high-volume SMT lines, while the 1.8V to 3.6V supply range simplifies direct connection to 3.3V or 5V-rectified bus designs. Diode replaces discrete timer/analog ICs with one programmable device.
Recommended
LED Lighting and Dimming Controller
The PIC24F16KL401-I/SO's ECCP module delivers the PWM channels required for multi-channel LED dimming and color-mixing in architectural or decorative lighting. Combined with its 10-bit ADC for ambient-light sensing and MSSP for digital control bus (I²C/SPI), it can both drive LED power stages and respond to lighting-network commands. The PIC24F16KL401's wide 1.8V–3.6V supply simplifies both 3.3V logic-level and direct Li-ion powered lighting designs.
Recommended
Home Automation Sensor Hub
For home automation sensor hubs (PIR motion, magnetic contact, leak, occupancy sensors), the PIC24F16KL401-I/SO combines nanoWatt XLP low-power modes with a 10-bit ADC and digital interfaces to gather analog and digital sensor data and report over UART or sub-GHz transceivers. The 16KB Flash accommodates protocol stacks for simple RF or wired standards, while the 1.8V–3.6V supply and small 20-SOIC footprint keep node size and cost low.
Recommended
Portable Medical Accessory
In portable medical accessories such as handheld thermometers, pulse oximeter accessories, or pill dispensers, the PIC24F16KL401-I/SO offers low-power operation and a 10-bit ADC suitable for sensor signal conditioning. Its industrial temperature grade and reliable Flash retention help meet the long-life demands of consumer-health products. The 20-SOIC package and 1.8V–3.6V supply simplify direct Li-ion battery designs with single-cell topologies common in portable medical devices.
Recommended
Industrial Sensor Interface Module
For industrial 4-20 mA loop-powered or 24V-bus sensor interface modules, the PIC24F16KL401-I/SO provides 16-bit throughput to handle linearization, calibration, and protocol conversion in software. Its MSSP (I²C/SPI) and dual UART simplify communication with external ADCs, DACs, and industrial bus transceivers. The industrial -40 °C to +85 °C temperature rating is suitable for cabinet-mounted industrial sensor electronics, while nanoWatt XLP modes help meet stringent power budgets.
Recommended
Low-Cost Remote Control / HMI
In low-cost remote controls and human-machine interface (HMI) keypads, the PIC24F16KL401-I/SO's ECCP PWM drives IR or LED indicators, while the ADC reads potentiometers. Its 16KB Flash accommodates protocol stacks for IR/RF encoding or local LCD/keypad control. The 20-SOIC package keeps assembly costs low, and the 1.8V–3.6V supply supports both disposable-battery and rechargeable-cell designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F16KL401-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F16KL401T-I/SO | PIC24F16KA301T-I/SO | PIC24F08KL401-I/SS |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SOIC | 20-SOIC (same) | 20-SOIC (same) | 20-SSOP (smaller) |
| Core | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit |
| CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| Flash Memory | 16 KB | 16 KB | 16 KB | 8 KB (-50%) |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB |
| Operating Voltage | 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 |
| ADC | 10-bit, up to 12 ch | 10-bit, up to 12 ch | 10-bit, up to 12 ch | 10-bit, up to 12 ch |
| Low-Power Modes | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP |
Key Differentiators
- 16-bit performance at 8-bit-style BOM cost (vs PIC18F equivalent parts)
- NanoWatt XLP deep-sleep currents in the nA region (vs PIC24F16KA301T-I/SO)
- Single-rail 1.8 V to 3.6 V supply simplifies BOM (vs Competing 5V-only MCUs)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin (pins 10 and 20 on the 20-SOIC) to suppress switching transients, and add a single 10 µF tantalum or ceramic bulk capacitor at the board-level VDD rail. The 1.8 V to 3.6 V supply range is forgiving of regulator tolerances, but VDD ripple above ~50 mV can degrade ADC accuracy on the analog input pins.
Keep analog-input traces short and away from PWM-driven digital outputs (ECCP, CCP) and clock lines to minimize ADC noise coupling. Route ICSP/PGECx and ICSP/PGEDx lines (RB6/RB7 on this 20-SOIC variant) with stub-free traces to keep programming/debug reliable, and avoid long parallel runs to switching signals to prevent coupling during in-circuit programming.
Configuration bits must be set explicitly for the oscillator source (e.g., internal 8 MHz vs external crystal) and watchdog/brownout behavior; relying on reset values can leave the device in an unintended clock mode or with brown-out disabled. Always generate code from MPLAB X project templates so configuration fuses are reviewed, and verify the device's ID location before field updates.
Compliance Information
RoHS and halogen-free compliance per Microchip product page and cross-reference listing. Industrial -40 °C to +85 °C only; not AEC-Q100 qualified for automotive. Estimated EOL date listed on some cross-reference sources is 2026; verify current lifecycle status with Microchip before committing to long-life programs.
