PIC18F24K42T-I/MV - 16KB Flash 8-bit MCU, 28-UQFN | Microchip
MPN: PIC18F24K42T-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.55 | $1.55 |
| 10 | $1.46 | $14.60 |
| 100 | $1.31 | $131.00 |
| 500 | $1.2 | $600.00 |
| 1,000 | $1.1 | $1,100.00 |
PIC18F24K42T-I/MV Overview
Drop-in alternatives for PIC18F24K42T-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 PIC18F24K42T-I/MV (same form factor and footprint) — differing in Package, ADC, Comparators, DAC, DMA Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F24K42-I/MV
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC18F24K42-E/MV
✅ Drop-In✓ In Stock
$1.75 / Unit
View Datasheet →PIC18F24K42T-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F24K42-I/SS
✅ Drop-In✓ In Stock
$1.53 / Unit
View Datasheet →PIC18F25K42T-I/MV
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →PIC18F24K40T-I/MV
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC18F24K42T-I/MV Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit RISC |
| Program Memory (Flash) | 16 KB (8K x 16) |
| RAM | 1 KB |
| EEPROM | 256 B |
| Max CPU Speed | 64 MHz |
| ADC | 12-bit ADC2 with Computation |
| DAC | 5-bit DAC |
| Comparators | 2 |
| DMA | Yes (peripheral-to-memory DMA) |
| CLC | Yes (Configurable Logic Cell) |
| CWG | Yes (Complementary Waveform Generator) |
| HLT | Yes (Hardware Limit Timer) |
| Vector Interrupts | Yes |
| DIA (Device Information Area) | Yes |
| MAP | Yes (Memory Access Partitioning) |
| Functional Safety (FuSa) | Yes |
| XLP Technology | nanoWatt XLP |
| Operating Temperature | -40C to +85C (Industrial, -I grade) |
| Package | 28-UQFN (MV) 4x4 mm |
| Mounting Type | Surface Mount |
| Pin Count | 28 |
| RoHS Status | Compliant |
PIC18F24K42T-I/MV Pin Configuration
| Pin 1 | RA0 — PORTA bit 0 / analog input |
| Pin 2 | RA1 — PORTA bit 1 / analog input |
| Pin 3 | RA2 — PORTA bit 2 / analog input |
| Pin 4 | RA3 — PORTA bit 3 / analog input |
| Pin 5 | RA4 — PORTA bit 4 |
| Pin 6 | RA5 — PORTA bit 5 |
| Pin 7 | RA6 — PORTA bit 6 |
| Pin 8 | RA7 — PORTA bit 7 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RB0 — PORTB bit 0 / ICSPDAT |
| Pin 11 | RB1 — PORTB bit 1 / ICSPCLK |
| Pin 12 | RB2 — PORTB bit 2 |
| Pin 13 | RB3 — PORTB bit 3 |
| Pin 14 | RB4 — PORTB bit 4 |
| Pin 15 | RB5 — PORTB bit 5 |
| Pin 16 | RB6 — PORTB bit 6 / PGC |
| Pin 17 | RB7 — PORTB bit 7 / PGD |
| Pin 18 | MCLRn/VPP — Master Clear reset / programming voltage |
| Pin 19 | VCAP — Internal voltage regulator bypass capacitor |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RC0 — PORTC bit 0 |
| Pin 22 | RC1 — PORTC bit 1 |
| Pin 23 | RC2 — PORTC bit 2 |
| Pin 24 | RC3 — PORTC bit 3 |
| Pin 25 | RC4 — PORTC bit 4 |
| Pin 26 | RC5 — PORTC bit 5 |
| Pin 27 | RC6 — PORTC bit 6 |
| Pin 28 | RC7 — PORTC bit 7 |
Typical Applications
PIC18F24K42T-I/MV is suitable for 7 applications: Battery-Powered IoT Sensor Node, Home Appliance HMI Control Board, BLDC / PMSM Motor Control, LED Lighting Controller, Industrial Sensor Transmitter, Consumer Wearable Device, Smart Home Control Panel.
Battery-Powered IoT Sensor Node
The PIC18F24K42T-I/MV is well suited for battery-powered IoT sensor nodes thanks to its nanoWatt XLP technology and rich core-independent peripherals. Sleep currents under 1 uA extend coin-cell life to multi-year levels, while 16 KB Flash and 1 KB RAM fit BLE/Zigbee host stacks or LoRaWAN MAC drivers. The DMA engine offloads ADC-to-memory transfers, letting the CPU stay in sleep longer between samples. Compared with an 8-bit AVR of similar Flash, the K42's peripheral trigger system and CLC enable event-driven designs that wake only on analog comparator crossings, dramatically reducing average power. Combined with a sensor such as the MCP9808 temperature IC and an RN4870 BLE module, the PIC18F24K42T-I/MV forms the core of a coin-cell sensor node running for years on a CR2032 cell.
Recommended
Home Appliance HMI Control Board
The PIC18F24K42T-I/MV is commonly used in home appliance HMI boards (washing machines, dishwashers, induction cooktops) where it drives LED/LCD displays, scans capacitive touch keypads, and executes motor control state machines. The Functional Safety (FuSa) library and IEC 60730 class B support make it attractive for safety-critical appliance designs requiring self-test diagnostics. With 16 KB Flash and 1 KB RAM, the part handles user-interface code, sensor polling, and motor control firmware simultaneously. The vectored interrupt controller reduces touch-keypad scan latency below 50 us, ensuring a responsive feel. Compared with older PIC18F46K22 designs, the K42's DMA and CLC simplify glue logic by integrating multiple discrete ICs into a single MCU, reducing BOM cost in white-goods HMI boards.
Recommended
BLDC / PMSM Motor Control
The PIC18F24K42T-I/MV drives small BLDC or PMSM motors up to a few hundred watts using its PWM module and Complementary Waveform Generator (CWG). The 64 MHz/16 MIPS core executes sensorless FOC or trapezoidal commutation in real time with sub-10 us loop periods. The 12-bit ADC2 with Computation captures back-EMF and phase current samples synchronized to PWM events via the CWG trigger, reducing software jitter. Compared with discrete gate-driver plus op-amp solutions, integrating the ADC, comparators, and CWG into the MCU shrinks the BOM and improves EMI by eliminating analog routing. The HLT (Hardware Limit Timer) provides hardware-level fault protection in case of stalled rotor events.
Recommended
LED Lighting Controller
The PIC18F24K42T-I/MV is widely used in commercial and architectural LED lighting controllers driving constant-current LED strings via PWM. Its 16 KB Flash stores DMX-512, DALI, or 0-10V dimming protocols; 1 KB RAM handles RGB/RGBW color-mixing tables. The 12-bit ADC2 monitors LED forward voltage for thermal foldback, while the 5-bit DAC generates reference currents for high-side current sensing. With XLP technology the controller can be always-on, listening for wireless dim commands, while consuming under 100 uA. Compared with discrete 8-bit designs, the K42's PWM fault handling and CLC reduce hardware complexity and improve dimming linearity below 1%.
Recommended
Industrial Sensor Transmitter
The PIC18F24K42T-I/MV forms the core of 4-20 mA or 0-10 V industrial sensor transmitters digitizing bridge sensors, RTDs, or thermocouples. The 12-bit ADC2 with Computation provides oversampling and digital filtering for noise-immune measurements, while the integrated 5-bit DAC calibrates the analog front-end. The -I industrial temperature grade (-40C to +85C) suits most factory environments. The CLC implements custom digital filter blocks in hardware, offloading CPU time and reducing software complexity. With 16 KB Flash, the MCU stores calibration coefficients and supports HART or IO-Link protocol stacks. Compared with older PIC16F designs, the K42 offers 4x the MIPS and integrated analog, simplifying transmitter BOMs significantly.
Recommended
Consumer Wearable Device
The PIC18F24K42T-I/MV is a strong fit for compact consumer wearable devices where 28-UQFN 4x4 mm footprint and XLP nanoWatt technology are critical. Sleep currents under 1 uA extend battery life across fitness bands, smart watches, and health patches. The DMA engine streams sensor data from accelerometer and PPG sensors directly to RAM without CPU wakeup, preserving battery. The vectored interrupt controller and on-chip comparator enable instant reaction to button presses or heart-rate threshold crossings. Compared with PIC18F46K22 in larger packages, the K42 in MV QFN reduces PCB area by 60%, enabling slimmer wearables without sacrificing the 16 KB Flash budget for wearable firmware stacks.
Recommended
Smart Home Control Panel
The PIC18F24K42T-I/MV integrates well into smart home control panels where it drives TFT/LCD displays, reads capacitive touch buttons, and communicates over UART/SPI to a Wi-Fi or Zigbee coprocessor. The 16 KB Flash and 1 KB RAM support complex menu logic and sensor aggregation firmware. The CLC (Configurable Logic Cell) implements glue logic in hardware - e.g., pulse stretching, edge detection - that would otherwise require external gates. The 12-bit ADC2 reads analog sensor inputs such as NTC thermistors for room temperature. Compared with PIC24 or dsPIC alternatives, the PIC18F24K42T-I/MV offers an 8-bit price point with enough peripherals for entry-level smart home hubs.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F24K42T-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F24K42-I/MV | PIC18F24K42-E/MV | PIC18F24K42T-I/ML | PIC18F24K42-I/SS | PIC18F25K42T-I/MV | PIC18F24K40T-I/MV |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (MV) 4x4 mm | 28-UQFN (MV) 4x4 mm | 28-UQFN (MV) 4x4 mm | 28-QFN (ML) 6x6 mm | 28-SSOP (SS) | 28-UQFN (MV) 4x4 mm | 28-UQFN (MV) 4x4 mm |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB | 16 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max CPU Speed | 64 MHz (16 MIPS) | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Temperature Grade | -40C to +85C (-I industrial) | -40C to +85C (-I) | -40C to +125C (-E extended) | -40C to +85C (-I) | -40C to +85C (-I) | -40C to +85C (-I) | -40C to +85C (-I) |
| DMA Engine | Yes | Yes | Yes | Yes | Yes | Yes | No (K40 family) |
| CLC Logic Cells | Yes | Yes | Yes | Yes | Yes | Yes | No (K40 family) |
| Unit Price (1 pc) | USD 1.55 | USD 1.55 (similar) | USD ~1.55 | USD ~1.55 | USD ~1.55 | USD ~1.65 (larger Flash) | USD ~1.40 (older K40) |
Key Differentiators
- Compact 4x4 mm UQFN package with full PIC18F K42 peripheral set (vs PIC18F24K42T-I/ML)
- Industrial temperature grade (-40C to +85C) at standard price point (vs PIC18F24K42-E/MV)
- Upgraded core-independent peripherals vs PIC18F24K40 family (vs PIC18F24K40T-I/MV)
- Functional Safety (FuSa) and IEC 60730 class B support (vs ATmega328P-AU)
Design Notes
The PIC18F24K42T-I/MV integrates an on-chip voltage regulator requiring a low-ESR bypass capacitor on the VCAP pin (pin 19 in the 28-UQFN MV package). According to the Microchip datasheet, use a 1 uF to 4.7 uF ceramic capacitor with ESR below 1 ohm on VCAP to ground, placed within 5 mm of the pin. For battery-powered designs, leverage the XLP nanoWatt sleep modes (Sleep, Idle, Doze) with sleep currents under 1 uA to maximize battery life.
Place decoupling capacitors as close to the VDD pin (pin 20 on MV package) as possible - use a 100 nF ceramic in parallel with 1 uF to 10 uF bulk. The exposed pad on the 28-UQFN MV package must be soldered to a thermal pad on the PCB for mechanical reliability and thermal performance. The ICSP programming pins (RB6/ICSPCLK and RB7/ICSPDAT) must remain accessible - do not place them on shared nets without buffers for in-circuit programming.
Do not skip the VCAP capacitor on pin 19 - without it the internal regulator will not regulate and the MCU will fail to start or behave erratically. The K42 DMA engine requires careful SFR configuration; improper DMA setup can lock the bus. Use the MPLAB XC8 compiler's DMA library helpers or the MCC code configurator to avoid DMA conflicts. When migrating from K40 firmware, verify that peripheral register addresses and interrupt vector mappings are updated for K42.
The 28-UQFN MV package is 4x4 mm with an exposed thermal pad - keep the central pad as a single solid copper pour stitched with thermal vias to inner ground planes. Route analog signals (RA0-RA5) away from digital switching lines to minimize ADC2 noise coupling. The CLC and CWG outputs can drive high-speed edges; keep their traces short and impedance-controlled if they feed external MOSFETs.
Compliance Information
RoHS compliant per Microchip product page. Supports IEC 60730 class B functional safety through FuSa library. Not AEC-Q100 qualified - use AEC-Q100 qualified parts for automotive safety-critical applications.
