PIC24F08KL401T-I/SO - 16-bit 32MHz MCU, 8KB Flash, 20-SOIC | Microchip
MPN: PIC24F08KL401T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.92 | $192.00 |
| 500 | $1.71 | $855.00 |
| 1,000 | $1.55 | $1,550.00 |
PIC24F08KL401T-I/SO Overview
A 16-bit microcontroller (MCU) is an embedded processor that executes instructions on 16-bit data paths in a single cycle, delivering roughly 2x the throughput of an 8-bit MCU while remaining power-efficient for cost-sensitive applications. The PIC24F family occupies the middle tier of Microchip's portfolio, sitting between the PIC18 (8-bit) and dsPIC33 (DSP-enhanced 16-bit) families and inheriting familiar PIC18 peripherals such as MSSP for I2C/SPI and CCP/ECCP for PWM, which simplifies migration from older 8-bit designs.
Key features of the PIC24F08KL401T-I/SO include the nanoWatt XLP technology suite (Deep Sleep, Doze, Idle modes), 17 GPIO, 10-bit ADC with internal reference support, MSSP (I2C/SPI), a configurable ECCP/PWM module, and a 32 kHz RTCC timer. The part is AEC-Q100 friendly with an industrial operating range of -40 C to +85 C and supports in-circuit serial programming (ICSP) via the MPLAB Snap or PICkit 4 debuggers.
Architecture-wise, the PIC24F08KL401T-I/SO uses a modified Harvard core with a 24-bit instruction word and 16-bit data path. This dual-bus architecture allows simultaneous fetch and access, while XLP modes drop quiescent current into the microamp range, suiting always-on sensors.
Typical applications include low-cost IoT sensor nodes, battery-powered consumer devices, USB-less human-interface controllers, small industrial control boards, and HVAC monitoring front ends. The wide 1.8V-3.6V range simplifies designs powered by 2x AA cells or single-cell Li-ion.
Design consideration: route an external 32.768 kHz crystal only if you need a real-time clock; otherwise use the internal LF oscillator to save two GPIOs and BOM cost. The MSSP, ADC, and I/O map must be checked against your PCB layout because some analog channels share pins with digital functions.
This page synthesizes distributor pricing, drop-in SOIC-20 alternatives from the PIC24F KL/ KA family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24F08KL401T-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 PIC24F08KL401T-I/SO (same form factor and footprint) — differing in ADC, Package, I/O Pins, Core Architecture, Maximum CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F08KL401-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24F08KL401T-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24F08KL401-I/SS
✅ Drop-In✓ In Stock
$1.6 / Unit
View Datasheet →PIC24F08KL302T-I/SO
✅ Drop-In✓ In Stock
$1.68 / Unit
View Datasheet →PIC24F08KA102T-I/SO
✅ Drop-In✓ In Stock
$1.94 / Unit
View Datasheet →PIC24F08KL401T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit (modified Harvard) |
| Family | PIC24F KL401 / PIC24F08KL401 series |
| Program Memory (Flash) | 8 KB (2.75K x 24 words) |
| SRAM | 1 KB |
| EEPROM / Data Flash | 512 bytes |
| Maximum CPU Speed | 32 MHz / 32 MIPS |
| Supply Voltage (VDD) | 1.8 V to 3.6 V (operating 3.0 V to 3.6 V) |
| I/O Pins | 17 |
| ADC | 10-bit, 9-channel (approx.) |
| Timers | Timer1 16-bit, Timer2/4 8-bit, RTCC |
| Communication | 1x MSSP (I2C/SPI), 1x UART |
| PWM | 1x CCP/ECCP module |
| Low-Power Modes | nanoWatt XLP (Sleep/Deep-Sleep/Doze/Idle) |
| Package | 20-SOIC (7.50 mm body width) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Programming / Debug | ICSP (MPLAB Snap, PICkit 4) |
PIC24F08KL401T-I/SO Pin Configuration
| Pin 1 | RA0/AN0 — Digital I/O / analog input 0 |
| Pin 2 | RA1/AN1 — Digital I/O / analog input 1 |
| Pin 3 | RA2/AN2 — Digital I/O / analog input 2 |
| Pin 4 | RA3/AN3 — Digital I/O / analog input 3 (input-only board reference) |
| Pin 5 | RA4 — Digital I/O (board reference; SOSC1 on some family variants) |
| Pin 6 | RA5 — Digital I/O (board reference; SOSC2 on some family variants) |
| Pin 7 | RA6/OSC2 — Digital I/O / crystal oscillator output (board reference) |
| Pin 8 | RA7/OSC1 — Digital I/O / crystal oscillator input (board reference) |
| Pin 9 | VDD — Positive supply (1.8V to 3.6V) |
| Pin 10 | VSS — Ground |
| Pin 11 | RB0/AN4 — Digital I/O / analog input 4 |
| Pin 12 | RB1/AN5 — Digital I/O / analog input 5 |
| Pin 13 | RB2/AN6 — Digital I/O / analog input 6 |
| Pin 14 | RB3/AN7 — Digital I/O / analog input 7 |
| Pin 15 | RB4 — Digital I/O (SDA1 on MSSP, board reference) |
| Pin 16 | RB5 — Digital I/O (SCL1 on MSSP, board reference) |
| Pin 17 | RB6/PGC — Digital I/O / ICSP clock (programming/debug) |
| Pin 18 | RB7/PGD — Digital I/O / ICSP data (programming/debug) |
| Pin 19 | RC0 — Digital I/O (Tx/UART, board reference) |
| Pin 20 | RC1 — Digital I/O (Rx/UART, board reference) |
Typical Applications
PIC24F08KL401T-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Industrial Control and HVAC Front-Ends, Consumer White-Good User Interfaces, USB-less Human-Machine Interface (HMI) Controllers, Low-Cost Lighting and LED Drivers, Educational and Hobbyist Prototyping.
Battery-Powered IoT Sensor Nodes
The PIC24F08KL401T-I/SO is ideal for battery-powered IoT sensor nodes because its nanoWatt XLP low-power modes drop quiescent current to microamp levels while retaining RAM for fast wake-up. The 1.8V-3.6V VDD range lets it run directly from 2x AA cells or a single Li-ion without a boost converter, and the 10-bit ADC with 9 channels supports multiple analog inputs. Placed on the sensor front-end board, it performs periodic measurements, applies digital filtering, and reports via the MSSP-based I2C link; estimated battery life at 1% duty cycle exceeds 5 years on a 2000 mAh cell.
Recommended
Industrial Control and HVAC Front-Ends
The PIC24F08KL401T-I/SO fits industrial HVAC control boards and small PLC front-ends where its industrial -40 C to +85 C operating range and 17 GPIO pins simplify multi-channel signal acquisition. The CCP/ECCP module drives PWM outputs for fan speed control or valve actuation, and the MSSP supports SPI/I2C communication with digital temperature or pressure sensors. Engineers typically place the MCU between the analog sensor conditioning stage and the main host controller, offloading PID loops from a more expensive processor.
Recommended
Consumer White-Good User Interfaces
Consumer white-good UI boards (washing machines, dishwashers, microwave ovens) benefit from the PIC24F08KL401T-I/SO because the 32 MHz core easily drives multiplexed 7-segment or character LCD displays, while 17 GPIO pins connect directly to keypads and LED indicators. The XLP low-power modes reduce standby power below Energy Star requirements for always-on appliance indicators. The CCP module drives buzzer PWM tones for alerts, and the MSSP interface accepts capacitive-touch expansion modules.
Recommended
USB-less Human-Machine Interface (HMI) Controllers
The PIC24F08KL401T-I/SO suits small HMI controllers where a USB-capable MCU is not required. Designers can use the UART to communicate with a higher-level display processor while dedicating the MSSP, ADC, and PWM channels to backlight control, encoder feedback, and tactile button scanning. The 8 KB Flash accommodates state-machine firmware for menu navigation, and XLP modes cut standby power when the HMI is idle.
Recommended
Low-Cost Lighting and LED Drivers
The PIC24F08KL401T-I/SO can manage small LED lighting controllers using its CCP/ECCP PWM channels to provide smooth dimming with minimal flicker. The 16-bit core runs color-mixing algorithms at high refresh rates, while XLP modes keep the standby draw low when the lights are off. I2C communication allows the MCU to act as a bridge between a wireless module and an LED string driver, simplifying the topology for cost-conscious smart-bulb designs.
Recommended
Educational and Hobbyist Prototyping
The PIC24F08KL401T-I/SO is a strong teaching tool for engineers moving from PIC18 to PIC24F, because it exposes the full 16-bit instruction set, MSSP, ADC, and PWM in a 20-pin SOIC breadboard-friendly package. MPLAB X IDE with the XC16 compiler and the PICkit 4 debugger provide a free and well-documented toolchain that scales from classroom to production. The 'T' tape-and-reel format is also convenient for low-volume pick-and-place prototyping runs.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F08KL401T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F08KL401-I/SO | PIC24F08KL401T-I/SS | PIC24F08KL302T-I/SO | PIC24F08KA102T-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SOIC (7.50 mm) | 20-SOIC - same | 20-SSOP - same footprint, different height | 20-SOIC - same | 20-SOIC - same |
| Program Memory (Flash) | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Maximum CPU Speed | 32 MHz / 32 MIPS | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Supply Voltage (VDD) | 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 |
| I/O Pins | 17 | 17 | 17 | 17 | 17 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- SOIC-20 form factor with tape-and-reel packaging for SMT manufacturing (vs PIC24F08KL401-I/SO (tube-shipped variant))
- nanoWatt XLP technology with sub-microamp Deep-Sleep current (vs PIC24F08KA102T-I/SO (KA family))
- PIC24F 16-bit core at 32 MHz / 32 MIPS throughput (vs PIC24F08KL302T-I/SO (KL302))
Design Notes
Estimated: At VDD=3.3V with 32 MHz active CPU and all peripherals on, the PIC24F08KL401T-I/SO draws roughly 8-10 mA. In Deep-Sleep XLP mode this drops below 1 uA. Place a 100 nF decoupling capacitor within 3 mm of VDD and a 4.7 uF bulk capacitor near the analog VDD pin (if exposed) to keep ADC measurements clean and to suppress VDD transients during PWM transitions.
Keep the 32.768 kHz crystal traces short and surround them with a ground guard if you need an accurate real-time clock. Place the ICSP lines (PGC/PGD) on dedicated PCB header pins to keep programming stable and avoid accidental shorts to high-current traces. Maintain 0.1-inch grid-compatible breakout for the SOIC-20 if you intend to mount the board on a perf-board prototype.
The PIC24F08KL401T-I/SO requires configuration bits to enable PGC/PGD as ICSP. If those bits are mis-set, the device may lock and require a high-voltage programmer to recover. Verify the configuration-word settings with MPLAB X before programming, and always tie MCLR to VDD through a 10 kohm pull-up unless a manual reset circuit is needed. Note that several GPIO share ADC analog channels - reassigning pins later can silently disable analog inputs.
Estimated: At 32 MHz, harmonic content of the internal oscillator can couple onto nearby analog traces if PCB layout is poor. Place analog input traces over a continuous ground plane, keep them shorter than 1/10 of the rise time, and add a small RC anti-alias filter (1 kohm + 100 pF) on each ADC input when measuring millivolt-level signals with the 10-bit ADC.
Compliance Information
RoHS and REACH compliant per Microchip substance compliance documentation. Lead-free Pb-free SOIC-20 finish; AEC-Q100 not formally qualified - choose PIC24F08KA/KL automotive variants for AEC-Q100.
