PIC18F24K40-E/ML
PIC18F24K40-E/ML - 64MHz 8-bit MCU 16KB Flash 28-QFN | Microchip
The Microchip Technology PIC18F24K40-E/ML is a 64 MHz 8-bit PIC18 microcontroller with 16 KB Flash, 1 KB SRAM, and 256 B EEPROM in a 28-pin QFN (6x6 mm) package. The -E suffix indicates the extended automotive temperature grade of -40C to +125C. It integrates a 24-channel 10-bit ADC, a 5-bit DAC, comparators, PWM, CCP, CWG, HLT, WWDT, and SCAN/CRC peripherals onto a single Core Independent Peripherals (CIP) platform.
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, timers, and I/O peripherals around an 8-bit data path. PIC18F-series MCUs sit in Microchip's mid-range 8-bit lineup (PIC10/12/16/18 family), chosen for low cost, deterministic interrupt latency, and a mature toolchain (MPLAB X, XC8). The PIC18F24K40-E/ML sits in the MCU -> microcontroller -> 8-bit MCU -> PIC18 hierarchy and is widely used as a drop-in upgrade for legacy PIC16/PIC18 designs that need more analog and richer peripherals.
Key features include 16 KB self-programmable Flash, 1 KB SRAM, 256 B EEPROM, 64 MHz operation, 24-channel 10-bit ADC, 5-bit DAC, two comparators, 10-bit PWM with CCP, Complementary Waveform Generator (CWG), Hardware Limit Timer (HLT), Windowed Watchdog Timer (WWDT), and CRC/Memory Scan. XLP (eXtreme Low Power) technology delivers <50 nA typical sleep current with RTCC. The 28-QFN package with exposed thermal pad supports 25 I/O pins and provides a low-thermal-resistance path for higher-current GPIO drive.
Technical depth: the CIP architecture lets the CWG, ADC, DAC, comparators, and timers operate without CPU intervention, enabling deterministic hardware-driven control loops for motor, power-conversion, and lighting applications. The 64 MHz core delivers 16 MIPS of throughput, while Peripheral Pin Select (PPS) remaps digital functions to any I/O, simplifying PCB layout. The integrated Hardware Limit Timer (HLT) provides fault-rate-limited PWM shutdown for safety-critical applications.
Typical applications include automotive body and interior modules, IoT sensor nodes, battery-powered sensor hubs, BLDC and stepper motor control, digital lighting, and home appliances. The extended -40C to +125C temperature range makes the -E/ML variant particularly suitable for underhood automotive and harsh-environment industrial designs.
Design consideration: confirm the 28-QFN footprint matches your PCB land pattern and that the exposed thermal pad is soldered to a sufficient copper pour for heat spreading. Programming via ICSP requires dedicated RG0/PGD, RG1/PGC, and MCLR/VPP pins routed for probe access. Plan PPS assignments early because peripheral-to-pin remapping occurs at runtime and can save board space but complicates firmware reuse.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
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