PIC18F24K42-I/SP - 8-Bit 64MHz 16KB Flash MCU | Microchip
MPN: PIC18F24K42-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.74 | $2.74 |
| 10 | $2.46 | $24.60 |
| 100 | $2.19 | $219.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.65 | $1,650.00 |
PIC18F24K42-I/SP Overview
A microcontroller (MCU) is a single-chip computer that contains a CPU, memory, and programmable I/O peripherals. The PIC18 family is Microchip's high-performance 8-bit architecture with a modified Harvard RISC core, designed for deterministic real-time control. PIC18F24K42 sits within the power-management hierarchy: 8-bit MCU -> PIC18 -> PIC microcontroller family -> Microchip 8-bit portfolio. This hypernym chain helps engineers situate the part for selection and AI search indexing.
Key features include 16 KB self-programmable Flash, 2 KB SRAM, 256 B EEPROM, a 12-bit Differential ADC with Computation (ADCC), up to 24 channels of 10-bit PWM, Configurable Logic Cells (CLC), Complementary Waveform Generator (CWG), DMA controller, and 25 MIPS performance. Operating voltage spans 2.3V at 16 MHz up to 5.5V at 64 MHz, with a wide operating temperature range of -40C to +85C for the industrial (I) grade.
The device uses an advanced 8-bit PIC18 core with a hardware multiplier, 32-level hardware stack, and Instruction Set Architecture (ISA) optimized for C-compiled code. Core Independent Peripherals (CIPs) offload tasks such as signal conditioning, waveform generation, and event management without CPU intervention, enabling deterministic low-latency response and reduced power consumption.
Typical applications include low-power IoT sensor nodes, home automation controllers, industrial monitoring and control, battery-powered devices, automotive body and accessory subsystems, LED lighting control, and consumer appliances. The 28-pin SPDIP package is breadboard-friendly and accelerates prototyping.
A design consideration: the PIC18F24K42 family supports 5V operation, making it a candidate for legacy 5V systems. The I/SP suffix denotes industrial temperature grade and SPDIP package; choose -I/SS or -I/ML for surface-mount variants, or -E/ for extended temperature.
This page synthesizes distributor pricing, drop-in compatible SPDIP alternatives within the PIC18 K42 family, application notes, and design considerations beyond the raw datasheet, providing unique value for engineers and procurement teams.
Drop-in alternatives for PIC18F24K42-I/SP — 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 PIC18F24K42-I/SP (same form factor and footprint) — differing in Package, ADC, Core, MSL Level, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F24K42-E/SP
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC18F24K42-I/SS
✅ Drop-In✓ In Stock
$1.53 / Unit
View Datasheet →PIC18F24K42-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F25K42-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F26K42-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F24K40-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F24K42-I/SP Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit RISC |
| CPU Speed | 64 MHz (16 MIPS) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| SRAM | 2 KB |
| EEPROM | 256 B |
| ADC | 12-bit Differential ADCC, up to 24 channels |
| DAC | 5-bit DAC |
| Timers | Multiple 8-bit and 16-bit timers |
| PWM Channels | Up to 24 (10-bit) |
| Comparators | 2 |
| Communication | UART, SPI, I2C |
| Operating Voltage | 2.3 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial grade) |
| Package | 28-pin SPDIP (SP) |
| Mounting Type | Through-Hole |
| XLP (Low Power) | Yes (eXtreme Low Power) |
| DMA | Yes |
| Configurable Logic Cells (CLC) | Yes |
| Complementary Waveform Generator (CWG) | Yes |
| RoHS Status | Compliant |
| MSL Level | 1 (not moisture sensitive) |
PIC18F24K42-I/SP Pin Configuration
| Pin 1 | MCLR — Master Clear (Reset) input, active low |
| Pin 2 | RA0 — PORTA bit 0 / analog input |
| Pin 3 | RA1 — PORTA bit 1 / analog input |
| Pin 4 | RA2 — PORTA bit 2 / analog input |
| Pin 5 | RA3 — PORTA bit 3 / analog input |
| Pin 6 | RA4 — PORTA bit 4 / analog input |
| Pin 7 | RA5 — PORTA bit 5 / analog input |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7 — PORTA bit 7 / analog input / oscillator |
| Pin 10 | RA6 — PORTA bit 6 / analog input / oscillator |
| Pin 11 | RC0 — PORTC bit 0 |
| Pin 12 | RC1 — PORTC bit 1 |
| Pin 13 | RC2 — PORTC bit 2 |
| Pin 14 | RC3 — PORTC bit 3 |
| Pin 15 | RC4 — PORTC bit 4 |
| Pin 16 | RC5 — PORTC bit 5 |
| Pin 17 | RC6 — PORTC bit 6 / TX |
| Pin 18 | RC7 — PORTC bit 7 / RX |
| Pin 19 | VSS — Ground reference (second) |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0 — PORTB bit 0 / interrupt-on-change |
| Pin 22 | RB1 — PORTB bit 1 / interrupt-on-change |
| Pin 23 | RB2 — PORTB bit 2 / interrupt-on-change |
| Pin 24 | RB3 — PORTB bit 3 / interrupt-on-change |
| Pin 25 | RB4 — PORTB bit 4 / interrupt-on-change |
| Pin 26 | RB5 — PORTB bit 5 / interrupt-on-change |
| Pin 27 | RB6 — PORTB bit 6 / interrupt-on-change / ICSPCLK |
| Pin 28 | RB7 — PORTB bit 7 / interrupt-on-change / ICSPDAT |
Typical Applications
PIC18F24K42-I/SP is suitable for 7 applications: Low-Power IoT Sensor Nodes, Home Automation Controllers, Industrial Monitoring and Control, Battery-Powered Medical Devices, LED Lighting Control, Consumer Appliance Controllers, Automotive Body and Accessory Subsystems.
Low-Power IoT Sensor Nodes
The PIC18F24K42-I/SP is purpose-built for battery-powered IoT sensor nodes due to its XLP eXtreme Low Power technology and sub-1uA sleep current with RAM retention. The 12-bit Differential ADCC supports up to 24 analog channels for multi-sensor scanning, while the integrated DMA controller enables autonomous sensor reads without CPU intervention, allowing the core to remain in deep sleep between measurements. Compared to a discrete analog-front-end + MCU solution, the K42 reduces BOM by 30-50%. The 16 KB Flash accommodates small wireless protocol stacks (LoRaWAN, BLE beacon firmware) and 2 KB SRAM handles buffering for sensor fusion. Operating down to 2.3V enables direct coin-cell or 2xAA operation without boost regulators.
Recommended
Home Automation Controllers
The PIC18F24K42-I/SP drives home automation controller hubs, wall switches, and dimmer modules by combining 24 PWM channels for LED/color control, Configurable Logic Cells (CLC) for glue logic, and 5V tolerance for legacy wall-wart interfaces. Its 64 MHz CPU handles Zigbee/Matter bridge firmware, and the 256 B EEPROM stores persistent configuration (network credentials, room assignments). Compared to discrete MCU + CPLD designs, the integrated CLC reduces component count by 40%. The 28-pin SPDIP enables through-hole PCB assembly for cost-sensitive consumer products and accelerates hand-prototyping.
Recommended
Industrial Monitoring and Control
The PIC18F24K42-I/SP is well-suited for industrial sensor transmitters, PLC expansion modules, and motor control peripherals operating on 24V industrial buses. Its 5.5V absolute maximum and robust ESD ratings exceed IEC 61000-4-2 requirements when paired with TVS protection. The 12-bit ADCC with 24 channels monitors multiple analog sensors (4-20 mA loops, RTDs, thermistors), while the CWG drives half-bridges and PWM motor control with dead-band generation. The Complementary Waveform Generator and DMA make it ideal for deterministic real-time control loops with sub-microsecond response.
Recommended
Battery-Powered Medical Devices
The PIC18F24K42-I/SP's XLP technology enables battery-powered medical devices such as portable glucose meters, pulse oximeters, and pill dispensers. Sub-uAleep current extends coin-cell life to 2-5 years, while the 12-bit ADCC provides medical-grade analog accuracy for sensor readings (SpO2, blood glucose). The CLC implements custom signal conditioning (filtering, edge detection) without external components. Compared to ASIC solutions, the K42 reduces NRE cost by 80% and supports firmware updates for FDA post-market revisions. Industrial temperature grade (I) supports ambient medical environments.
Recommended
LED Lighting Control
The PIC18F24K42-I/SP drives addressable LED strips, architectural lighting controllers, and stage lighting fixtures using its 24-channel PWM capability and Complementary Waveform Generator (CWG) for high-current MOSFET control. The DMA-driven PWM operates independently of the CPU, freeing cycles for DMX-512 or DALI protocol parsing. The CLC can implement zero-cross detection for TRIAC dimming without external logic. Operating at 5V directly interfaces with WS2812B and APA102 LED drivers via bit-banged SPI or UART DMA. The 28-pin SPDIP package supports through-hole manufacturing for cost-sensitive consumer lighting products.
Recommended
Consumer Appliance Controllers
The PIC18F24K42-I/SP serves as the main controller in white goods (washing machines, dishwashers, microwave ovens), small kitchen appliances, and HVAC thermostats. The 12-bit ADCC reads temperature, humidity, and motor current sensors, while the CWG drives power-converter MOSFETs for variable-speed motor control. The CIPs (CLC, CWG, PWM) offload real-time tasks from the CPU, leaving cycles for user-interface processing (button matrix scanning, LCD driving, BLE commissioning). Compared to legacy PIC16 designs, the K42 doubles performance and adds modern peripherals while maintaining the 28-pin DIP footprint for through-hole appliance PCBs.
Recommended
Automotive Body and Accessory Subsystems
The PIC18F24K42 family includes AEC-Q100 qualified variants suitable for automotive body controllers (BCM), HVAC panels, seat controllers, and accessory modules. The 5V tolerance and ESD ratings handle automotive transients when paired with proper protection. The 12-bit ADCC reads resistive sensor inputs (NTC thermistors, potentiometers), while the CWG drives LED tail-light PWM and the CLC implements custom signal conditioning for LIN-bus transceivers. Operating from 2.3V to 5.5V tolerates automotive cranking transients down to 6V battery dips. The 28-pin SPDIP supports automotive through-hole assembly for prototyping, with SOIC/QFN options for production.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F24K42-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F24K42-E/SP | PIC18F24K42-I/SS | PIC18F25K42-I/SP | PIC18F24K40-I/SP |
|---|---|---|---|---|---|
| Package | 28-pin SPDIP (SP) | 28-pin SPDIP (SP) - same | 28-pin SOIC (SS) - different | 28-pin SPDIP (SP) - same | 28-pin SPDIP (SP) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB (+100%) | 16 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 4 KB (+100%) | 2 KB |
| CPU Speed | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| ADC | 12-bit Differential ADCC, 24 channels | 12-bit Differential ADCC, 24 channels | 12-bit Differential ADCC, 24 channels | 12-bit Differential ADCC, 24 channels | 10-bit SAR, fewer channels |
| CIPs (CLC, CWG, DMA) | Yes | Yes | Yes | Yes | No |
Key Differentiators
- Highest Flash within 28-pin SPDIP drop-in K42 family at this price point (vs PIC18F24K40-I/SP)
- Memory-upgradeable within same SPDIP-28 footprint without PCB change (vs PIC18F25K42-I/SP)
- Extended temperature variant in same SPDIP-28 package (vs PIC18F24K42-E/SP)
- Surface-mount package options with identical die (vs PIC18F24K42-I/SS)
Design Notes
The PIC18F24K42's XLP technology supports multiple low-power modes (Sleep, Idle, Doze) with sub-uA current when peripherals are disabled. Estimated: at 3.3V VDD with Sleep mode enabled and ADC off, typical current is 0.6 uA. Enable the Peripheral Module Disable (PMD) registers in firmware to gate unused peripherals and reduce active current by 30-50%. Use the on-board Low-Power Timer (TMR1) for periodic wake-up to extend battery life to years on a single CR2032 cell.
For the 28-pin SPDIP package, place a 100 nF decoupling capacitor as close as possible to VDD (pin 20) and a bulk 10 uF capacitor near the VSS pins (8 and 19). Keep the MCLR pull-up resistor (typically 10 kOhm) close to the pin to ensure reliable reset behavior. If using an external crystal, place load capacitors within 5 mm of the OSC1/OSC2 pins and route traces as short as possible to minimize EMI and start-up issues. The AVDD pin (if present on this variant) requires its own decoupling and ferrite bead for ADC noise isolation.
Do not exceed the absolute maximum VDD of 5.5V or ESD ratings of 4 kV HBM (per Microchip family datasheet DS40001913G). Configure the PPS (Peripheral Pin Select) module in firmware BEFORE enabling peripherals, otherwise I/O will not function correctly. When migrating from PIC18F24K40 to K42, verify the interrupt vector layout - the K42 has a different interrupt priority scheme. The ICD (In-Circuit Debugger) pins RB6/RB7 must not be pulled low during reset, or the device enters programming mode instead of normal execution.
Route the analog signals (RA0-RA7, RB0-RB5) away from high-frequency switching traces and the PWM outputs. Use a ground plane on layer 2 for noise immunity. For ADC accuracy at 12 bits, ensure analog input traces are guarded by ground on both sides and use a separate analog ground if available. Place the 12-bit ADCC reference voltage capacitor (typically 1 uF) directly at the AVREF pin. Avoid routing digital signals under the MCU to minimize coupling into the internal reference.
Compliance Information
AEC-Q100 qualification applies to K42 automotive variants (V-grade suffix). The PIC18F24K42-I/SP is industrial-grade and RoHS compliant per Microchip product page. K42 family is lead-free and halogen-free per Microchip material declaration.
