PIC18LF24K42T-I/MV - 64MHz 16KB Flash 8-bit XLP MCU | Microchip
MPN: PIC18LF24K42T-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.39 | $2.39 |
| 10 | $2.15 | $21.50 |
| 100 | $1.92 | $192.00 |
| 500 | $1.71 | $855.00 |
| 1,000 | $1.52 | $1,520.00 |
| 3,300 | $1.35 | $4,455.00 |
PIC18LF24K42T-I/MV Overview
An 8-bit microcontroller (MCU) is a programmable processor with an 8-bit data path, internal Flash program memory, RAM, EEPROM, and on-chip peripherals. Within the broader semiconductor hierarchy, an MCU belongs to the microprocessor family, sits under microcontrollers alongside 16-bit and 32-bit devices, and is widely used for cost-sensitive, deterministic, low-power embedded control. Microchip's PIC18 family extends the baseline PIC16 architecture with 16-bit opcode instructions, hardware multiplier, and prioritized interrupts, while the K42 series adds high-resolution core-independent peripherals such as the 12-bit ADC with Computation (ADC2), Configurable Logic Cells (CLC), Complementary Waveform Generator (CWG), DMA, and Vectored Interrupt Controller.
Key features include 16KB (8K x 16) Flash, 1KB SRAM, 256B EEPROM, 12-bit ADC2 with capacitive voltage divider support, 5-bit DAC, two op-amps, two comparators, DMA, Vector Interrupts, CLC, CWG, HLT (Hardware Limit Timer), PWM, CCP, and CIP (Core Independent Peripherals). The XLP designation delivers nanoWatt technology for deep sleep currents in the microamp range, making the device suitable for battery-powered designs.
The PIC18LF24K42T-I/MV uses an enhanced Harvard architecture with a 16-bit program word and 8-bit data path, plus a C compiler-friendly instruction set. The 64MHz internal oscillator and 12-bit ADC2 with up to 24-channel input mux provide deterministic analog performance for sensor and touch applications.
Typical applications include IoT sensor nodes, low-power battery devices, touch sensing, LED lighting controllers, and consumer electronics. The wide 1.8V-3.6V range supports single-cell Li-ion or two-AA battery designs.
Designers should configure the PPS (Peripheral Pin Select) mapping early, as K42 devices allow almost any digital peripheral to be routed to most pins, simplifying PCB layout. The ADC2 requires the FVR module enabled for stable reference, and the ADC channel-to-pin mapping must be confirmed against the device pinout.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated in the manufacturer datasheet, providing an engineering reference for selection and BOM risk mitigation.
Drop-in alternatives for PIC18LF24K42T-I/MV — 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 PIC18LF24K42T-I/MV (same form factor and footprint) — differing in ADC, Comparators, DAC, Package, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF24K42-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF25K42T-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF24K42T-E/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F24K42T-I/MV
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC18F25K42T-I/MV
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →PIC18LF24K42T-I/MV Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit, enhanced Harvard, 16-bit opcode) |
| Family | PIC18 K42 XLP |
| Maximum CPU Frequency | 64 MHz |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data SRAM | 1 KB |
| Data EEPROM | 256 B |
| Operating Supply Voltage | 1.8 V to 3.6 V |
| I/O Pins | 25 |
| ADC | 12-bit ADC2 with Computation, up to 24 channels |
| DAC | 5-bit |
| Comparators | 2 |
| Op-Amps | 2 |
| DMA Channels | Yes (DMA) |
| Core Independent Peripherals | CLC, CWG, HLT, PWM, CCP |
| Vector Interrupts | Yes (fixed-latency VIC) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 28-pin UQFN (MV) 4x4 mm |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18LF24K42T-I/MV Pin Configuration
| Pin 1 | RA0 — Port A bit 0 / analog input |
| Pin 2 | RA1 — Port A bit 1 / analog input |
| Pin 3 | RA2 — Port A bit 2 / analog input |
| Pin 4 | RA3 — Port A bit 3 / analog input |
| Pin 5 | RA4 — Port A bit 4 / analog input |
| Pin 6 | RA5 — Port A bit 5 / analog input |
| Pin 7 | RA6 — Port A bit 6 / analog input |
| Pin 8 | RA7 — Port A bit 7 / analog input |
| Pin 9 | VSS — Ground |
| Pin 10 | RB0 — Port B bit 0 / analog input |
| Pin 11 | RB1 — Port B bit 1 / analog input |
| Pin 12 | RB2 — Port B bit 2 / analog input |
| Pin 13 | RB3 — Port B bit 3 / analog input |
| Pin 14 | RB4 — Port B bit 4 / analog input |
| Pin 15 | RB5 — Port B bit 5 / analog input |
| Pin 16 | RB6 — Port B bit 6 / ICSPCLK |
| Pin 17 | RB7 — Port B bit 7 / ICSPDAT |
| Pin 18 | VSS — Ground (secondary) |
| Pin 19 | VDD — Positive supply |
| Pin 20 | RC0 — Port C bit 0 / analog input |
| Pin 21 | RC1 — Port C bit 1 / analog input |
| Pin 22 | RC2 — Port C bit 2 / analog input |
| Pin 23 | RC3 — Port C bit 3 / analog input / SCL |
| Pin 24 | RC4 — Port C bit 4 / analog input / SDA |
| Pin 25 | RC5 — Port C bit 5 / analog input |
| Pin 26 | RC6 — Port C bit 6 / analog input |
| Pin 27 | RC7 — Port C bit 7 / analog input |
| Pin 28 | VDD — Positive supply (secondary) |
Typical Applications
PIC18LF24K42T-I/MV is suitable for 7 applications: IoT Sensor Node / Battery-Operated Wireless Sensor, Capacitive Touch User Interface, LED Lighting Controller / Smart Lighting Driver, Consumer Appliance Control (HMI Front Panel), Portable Medical / Wellness Wearable, Industrial Sensor Transmitter (4-20mA Loop-Powered), USB HID / Low-Speed Peripheral Dongle.
IoT Sensor Node / Battery-Operated Wireless Sensor
The PIC18LF24K42T-I/MV's 1.8V-3.6V LF supply range, nanoWatt XLP Sleep current (<1 uA typical), 12-bit ADC2 with up to 24 channels, and 64MHz CPU make it ideal for coin-cell powered IoT nodes that must run for years on a single CR2032. The 25 I/O and DMA controller offload ADC conversion sequences so the CPU can stay in Sleep until a threshold is crossed, and the Vectored Interrupt Controller wakes only on relevant events. Typical designs pair the PIC18LF24K42T-I/MV with a sub-GHz or BLE transceiver; firmware wakes the MCU every 5 seconds to read a temperature/humidity sensor over I2C, transmits the result, and returns to Sleep.
Recommended
Capacitive Touch User Interface
The PIC18LF24K42T-I/MV integrates the ADC2 with Computation (CVD) peripheral that automates Capacitive Voltage Divider scans for mTouch implementations. The 12-bit ADC2 oversamples and filters touch readings in hardware, freeing the CPU for UI logic and communication. Designers can implement 12+ touch buttons or a slider using only the on-chip ADC, with no external touch IC. The 1.8V operation supports direct connection to 2xAA battery stacks in remote controls, kitchen appliances, and consumer electronics.
Recommended
LED Lighting Controller / Smart Lighting Driver
The PIC18LF24K42T-I/MV's CWG (Complementary Waveform Generator), multiple PWM channels, and 5-bit DAC support dimmable LED driver topologies. The CWG generates dead-band-controlled complementary outputs for synchronous buck or half-bridge LED drivers without CPU intervention. The DMA moves PWM duty-cycle updates automatically so color-mixing or chase patterns run from RAM buffers. Typical designs use the LF process for direct 3.3V rail connection and the nanoWatt Sleep for standby power compliance with Energy Star.
Recommended
Consumer Appliance Control (HMI Front Panel)
The PIC18LF24K42T-I/MV combines 25 I/O pins, two op-amps, two comparators, and a 12-bit ADC2 in a single UQFN-28 4x4mm package - ideal for the front-panel HMI of coffee makers, washing machines, and air purifiers. The op-amps can condition sensor signals directly (current sense, NTC temperature divider), eliminating external analog ICs. The CLC allows glue logic like fan-tachometer pulse stretching or button debounce to be implemented in hardware, reducing firmware complexity.
Recommended
Portable Medical / Wellness Wearable
The PIC18LF24K42T-I/MV's XLP nanoWatt Sleep (<1 uA), 64MHz burst CPU, 12-bit ADC2, and 1.8V operation make it suitable for battery-powered wearable health monitors. The op-amp and ADC2 pair can digitize PPG (photoplethysmography) or single-lead ECG signals at modest sampling rates. The 16KB Flash fits simple heart-rate algorithms, and DMA offloads ADC conversion to leave the CPU free for BLE handshakes. Battery life of 1-3 months on a single CR2032 is achievable with proper duty-cycling.
Recommended
Industrial Sensor Transmitter (4-20mA Loop-Powered)
The PIC18LF24K42T-I/MV's 1.8V minimum supply, low-power ADC2, and 25 I/O make it usable in 4-20mA loop-powered industrial transmitters where total loop current is limited to 3.6mA. The MCU runs at low clock rates (4MHz) with most peripherals gated off, staying within the loop-power budget. The CLC provides hardware oversampling of the ADC for noise rejection in electrically-noisy factory environments. The extended-temperature variant PIC18LF24K42T-E/MV covers -40C to +125C for outdoor or process-industry deployments.
Recommended
USB HID / Low-Speed Peripheral Dongle
The F variant (PIC18F24K42T-I/MV) supports 5V operation and integrates a USB 2.0 Full-Speed peripheral with on-chip transceiver, while the LF variant is used for 3.3V-only designs. Both share the UQFN-28 footprint and pinout, allowing the same PCB to be populated with either MCU depending on USB-bus vs battery operation. The 64MHz CPU, 16KB Flash, and DMA enable USB HID class implementations (keyboards, mice, custom HID) with ample code space for HID descriptor stacks.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF24K42T-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF24K42-I/MV | PIC18LF25K42T-I/MV | PIC18LF24K42T-E/MV | PIC18F24K42T-I/MV | PIC18F25K42T-I/MV |
|---|---|---|---|---|---|---|
| Package | 28-UQFN (MV) 4x4mm | 28-UQFN (MV) 4x4mm - same | 28-UQFN (MV) 4x4mm - same | 28-UQFN (MV) 4x4mm - same | 28-UQFN (MV) 4x4mm - same | 28-UQFN (MV) 4x4mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Process Variant | LF (1.8V-3.6V) | LF (1.8V-3.6V) | LF (1.8V-3.6V) | LF (1.8V-3.6V) | F (2.3V-5.5V) | F (2.3V-5.5V) |
| Flash | 16 KB | 16 KB | 32 KB (+100%) | 16 KB | 16 KB | 32 KB (+100%) |
| RAM | 1 KB | 1 KB | 2 KB (+100%) | 1 KB | 1 KB | 2 KB (+100%) |
| Max Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +85 C | -40 C to +85 C |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
Key Differentiators
- Highest integrated analog content in 8-bit XLP family (vs PIC18LF24K22 (older generation))
- Vectored Interrupts with fixed latency (vs PIC18LF24K22 (older generation))
- Same-package F variant for 5V-tolerant designs (vs PIC18LF24K42T-I/MV vs PIC18F24K42T-I/MV)
Design Notes
The PIC18LF24K42T-I/MV requires a bulk decoupling capacitor (4.7 uF to 10 uF) and a high-frequency 100 nF ceramic within 5 mm of the VDD pins. Per the Microchip K42 datasheet, the LF process draws <1 uA in Sleep with RTCC enabled. For battery designs, gate all unused peripherals in firmware to achieve the nanoWatt Sleep current. Always enable the BOR (Brown-Out Reset) to ensure predictable behavior as the battery discharges.
The 28-UQFN (MV) 4x4mm package has an exposed thermal pad that must be soldered to a ground pour for mechanical reliability and thermal dissipation. Per the Microchip K42 datasheet, the EP should connect to VSS through at least 4 thermal vias in a 0.3mm pitch array. Route analog signals (ADC2 inputs, op-amp outputs) away from PWM and digital switching traces to minimize noise coupling into the 12-bit ADC measurements.
Configuration bits must be set BEFORE the first instruction executes - any invalid Configuration setting can lock the part or cause unexpected oscillator behavior. Per the Microchip K42 datasheet, the PPS (Peripheral Pin Select) must be unlocked and configured before assigning peripherals to physical pins. Failing to gate unused peripherals in firmware can waste 100-300 uA in Run mode, dramatically shortening battery life. Use the ADC2's CTMU for ratiometric capacitive touch, not raw ADC reads.
Estimated: with 64MHz internal oscillator and HFINTOSC, the PIC18LF24K42T-I/MV generates switching noise on VDD. Place the 100 nF decoupling capacitor within 2mm of each VDD pin. For ADC2 measurements with 1 LSB accuracy, use the FVR (Fixed Voltage Reference) module set to 2.048V or 4.096V and oversample by 16x for sub-mV precision. The ADC2 acquisition time (TACQ) must be configured to >=1 us for full 12-bit accuracy per the datasheet.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified; not applicable for automotive safety-critical systems. For automotive applications, consult Microchip's AEC-Q100 qualified MCU families.
