PIC18LF45K42-E/ML - 64MHz 32KB Flash 8-bit MCU | Microchip
N.º de pieza: PIC18LF45K42-E/ML ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.62 | $2,62 |
| 10 | $2.36 | $23,60 |
| 100 | $2.05 | $205,00 |
| 500 | $1.78 | $890,00 |
| 1.000 | $1.55 | $1.550,00 |
PIC18LF45K42-E/ML Descripción general
An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, program memory (Flash), data memory (RAM), non-volatile storage (EEPROM), and a rich set of peripherals such as timers, ADCs, communication interfaces, and GPIO. PIC18 microcontrollers use a RISC-based Harvard architecture; the 'K42 family adds Core Independent Peripherals (CIPs) that execute tasks without CPU intervention. The LF prefix denotes the 1.8V–3.6V low-voltage variant, with the F (3.0V–5.5V) variant being the PIC18F45K42. The 'K42 line falls within the broader PIC18 family > 8-bit PIC microcontrollers > Microcontrollers (MCU) > semiconductors taxonomy used by distributors.
Key features of the PIC18LF45K42-E/ML include a 12-bit ADC with Computation, a 5-bit DAC, three analog comparators with a DAC reference, zero-cross detect (ZCD), DMA controller, vectored interrupts, configurable logic cells (CLC), complementary waveform generator (CWG), 16-bit PWM, UART/SPI/I2C with PPS, watchdog timer (WWDT), scan/CRC, and idle/doze/peripheral module disable (PMD) power-saving modes. These peripherals are tuned for sensor nodes, motor control loops, lighting, and small motor/valve drivers.
The 'K42 architecture combines a high-performance 8-bit core (64MHz, 16 MIPS) with hardware acceleration through DMA and CIPs, enabling deterministic real-time response without loading the CPU. The peripheral pin select (PPS) allows flexible digital pin mapping, simplifying PCB layout when changing signal assignments. Together these blocks give designers a flexible platform for low-power embedded control.
Typical applications include low-power IoT sensor nodes, battery-powered instrumentation, white-goods and appliance controls, lighting and LED drivers, automotive body and sensor interfaces, sensor signal conditioning, and small brushed-DC or stepper motor control loops. The wide 1.8V–3.6V range supports single-cell Li-ion or 2× AA battery chemistries.
When designing with this part, ensure that the MCLR reset circuit and decoupling capacitors follow the datasheet typical application circuit. Verify that peripheral allocations via PPS do not conflict, and use the XLP sleep modes plus PMD for sub-µA standby currents in battery-powered products.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone, giving engineers and procurement teams a single source for selection, replacement, and sourcing decisions.
Alternativas directas para PIC18LF45K42-E/ML — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC18LF45K42-E/ML (mismo factor de forma y huella) — difiere en ADC, Package, Operating Temperature, Program Memory (Flash), Data RAM.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18LF46K42-E/ML
✅ Sustitución directa✓ En stock
$1.96 / unidad
Ver hoja de datos →PIC18LF47K42-E/ML
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18F45K42-E/ML
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18LF45K40-I/ML
✅ Sustitución directa✓ En stock
$1.92 / unidad
Ver hoja de datos →PIC18LF45K22-I/ML
✅ Sustitución directa✓ En stock
$2.28 / unidad
Ver hoja de datos →PIC18LF45K42-E/ML Valores máximos y características eléctricas
| Core | PIC 8-bit RISC (PIC18) |
| Family | PIC® XLP™ 18K (PIC18 LF K42) |
| CPU Speed | 64 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (16K × 16) |
| SRAM | 2 KB |
| EEPROM | 256 B |
| Supply Voltage (Vdd) | 1.8 V to 3.6 V |
| Temperatura de funcionamiento | -40 °C to +125 °C (E = Extended) |
| Encapsulado | 44-QFN (8x8) with exposed pad |
| ADC | 12-bit ADC2 with computation, up to 43 channels |
| DAC | 5-bit DAC |
| Comparators | 3 analog comparators |
| ZCD (Zero-Cross Detect) | Yes |
| DMA Controller | Yes (Core Independent) |
| PWM | 16-bit PWM, multiple channels |
| CWG (Complementary Waveform Generator) | Yes |
| CLC (Configurable Logic Cells) | Yes |
| Communications | UART, SPI, I²C with PPS |
| Vectored Interrupts | Yes |
| Watchdog Timer | WWDT + scan/CRC |
| Power-Saving Modes | IDLE / DOZE / PMD / XLP sleep |
| I/O Pins | 36 (typical for 44-QFN K42 family) |
| Estado RoHS | Compliant |
Configuración de pines de PIC18LF45K42-E/ML
| Pin 1 | RE3/MCLR — Master Clear (reset) input, weak pull-up, input only |
| Pin 2 | RA0 — PORTA bit 0, analog capable |
| Pin 3 | RA1 — PORTA bit 1, analog capable |
| Pin 4 | RA2 — PORTA bit 2, analog capable |
| Pin 5 | RA3 — PORTA bit 3, analog capable |
| Pin 6 | RA4 — PORTA bit 4, analog capable |
| Pin 7 | RA5 — PORTA bit 5, analog capable |
| Pin 8 | RA6 — PORTA bit 6, analog capable |
| Pin 9 | RA7 — PORTA bit 7, analog capable |
| Pin 10 | Vss — Ground reference |
| Pin 11 | Vdd — Positive supply voltage |
| Pin 12 | RB0 — PORTB bit 0, analog capable, IOC |
| Pin 13 | RB1 — PORTB bit 1, analog capable, IOC |
| Pin 14 | RB2 — PORTB bit 2, analog capable, IOC |
| Pin 15 | RB3 — PORTB bit 3, analog capable, IOC |
| Pin 16 | RB4 — PORTB bit 4, IOC |
| Pin 17 | RB5 — PORTB bit 5, IOC |
| Pin 18 | RB6 — PORTB bit 6, IOC, ICD clock |
| Pin 19 | RB7 — PORTB bit 7, IOC, ICD data |
| Pin 20 | Vss — Ground reference |
| Pin 21 | Vdd — Positive supply voltage |
| Pin 22 | RC0 — PORTC bit 0, analog capable |
| Pin 23 | RC1 — PORTC bit 1, analog capable |
| Pin 24 | RC2 — PORTC bit 2, analog capable |
| Pin 25 | RC3 — PORTC bit 3, analog capable |
| Pin 26 | RC4 — PORTC bit 4, analog capable |
| Pin 27 | RC5 — PORTC bit 5, analog capable |
| Pin 28 | RC6 — PORTC bit 6, analog capable |
| Pin 29 | RC7 — PORTC bit 7, analog capable |
| Pin 30 | Vss — Ground reference |
| Pin 31 | Vdd — Positive supply voltage |
| Pin 32 | RD0 — PORTD bit 0, analog capable |
| Pin 33 | RD1 — PORTD bit 1, analog capable |
| Pin 34 | RD2 — PORTD bit 2, analog capable |
| Pin 35 | RD3 — PORTD bit 3, analog capable |
| Pin 36 | RD4 — PORTD bit 4, analog capable |
| Pin 37 | RD5 — PORTD bit 5, analog capable |
| Pin 38 | RD6 — PORTD bit 6, analog capable |
| Pin 39 | RD7 — PORTD bit 7, analog capable |
| Pin 40 | Vss — Ground reference |
| Pin 41 | Vdd — Positive supply voltage |
| Pin 42 | RE0 — PORTE bit 0, analog capable |
| Pin 43 | RE1 — PORTE bit 1, analog capable |
| Pin 44 | RE2 — PORTE bit 2, analog capable |
Aplicaciones típicas
PIC18LF45K42-E/ML es adecuado para 6 aplicacións: Battery-Powered IoT Sensor Nodes, White-Goods and Appliance Control, Automotive Body and Sensor Modules, LED Lighting and Driver Control, Small Brushed-DC and Stepper Motor Control, Industrial Sensor Signal Conditioning.
Battery-Powered IoT Sensor Nodes
The PIC18LF45K42-E/ML fits battery-powered IoT sensor nodes because its 1.8V–3.6V Vdd range supports single-cell Li-ion or 2× AA chemistries without level shifters, and its XLP sleep plus PMD module-disable modes keep standby current in the sub-µA range. The 12-bit ADC2 with computation oversamples sensor signals while the DMA controller moves data into RAM without waking the CPU, extending battery life on duty-cycled wireless sensor designs. PPS allows flexible SPI/I²C pin mapping for transceivers and sensors, simplifying PCB layout for compact wearables and remote telemetry.
Recomendado
White-Goods and Appliance Control
The PIC18LF45K42-E/ML is well suited to white-goods appliance controls because the CWG (Complementary Waveform Generator) and 16-bit PWM blocks drive power-stage MOSFETs for motor and heater regulation directly from the MCU. The three analog comparators plus the ZCD detect zero-crossing of mains or triac edges for reliable AC switching and dimmer-style controls. PPS remapping lets designers route control signals to adjacent PCB pins, reducing trace crossings. Vectored interrupts keep latency low for safety-critical events, while the WWDT and scan/CRC guard against firmware corruption in long-life products.
Recomendado
Automotive Body and Sensor Modules
The PIC18LF45K42-E/ML supports automotive body and sensor module designs because it operates across the -40°C to +125°C range and combines a 12-bit ADC with computation for sensor linearization, plus a 5-bit DAC for reference biasing. Vectored interrupts and DMA keep response deterministic for body-electronics events like door modules or seat controllers. PPS helps reroute signals when a board layout needs to fit a tight enclosure. Note: for AEC-Q100 qualified automotive variants in the same family, look at the PIC18F45K42-E/ML Q1 derivatives from Microchip.
Recomendado
LED Lighting and Driver Control
The PIC18LF45K42-E/ML fits LED lighting drivers because the 16-bit PWM with multiple channels and the CWG generate precise dimming waveforms with dead-band control, while the ZCD detects AC line zero crossings for triac-dimmable retrofit lamps. The CLC blocks combine PWM and ZCD events without CPU loading, easing firmware complexity. DMA offloads LED color-mixing math in RGBW fixtures. The 1.8V–3.6V range suits constant-current LED drivers that already run from low-voltage rails.
Recomendado
Small Brushed-DC and Stepper Motor Control
The PIC18LF45K42-E/ML drives small brushed-DC and stepper motors because the CWG block generates complementary PWMs with programmable dead-band for half-bridge and full-bridge MOSFET stages, while the 16-bit PWM provides fine speed and torque control. The three analog comparators sense motor current via shunt resistors for cycle-by-cycle current limiting, and the ZCD helps with back-EMF commutation on steppers. DMA frees the CPU from repetitive register servicing in tight control loops, while vectored interrupts keep commutation timing deterministic.
Recomendado
Industrial Sensor Signal Conditioning
The PIC18LF45K42-E/ML fits industrial sensor signal-conditioning front-ends because the 12-bit ADC2 with computation performs oversampling, averaging, and threshold comparison in hardware, offloading filtering from the CPU. The 5-bit DAC plus three analog comparators build adjustable trip points for limit switches and process alarms. PPS allows digital interfaces to be remapped when adding RS-485 transceivers or isolated I²C links. WWDT and scan/CRC support functional-safety diagnostic coverage required in industrial PLC analog-input modules.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18LF45K42-E/ML — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC18LF46K42-E/ML | PIC18LF47K42-E/ML | PIC18F45K42-E/ML | PIC18LF45K40-I/ML | PIC18LF45K22-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8) | 44-QFN (8x8) - same | 44-QFN (8x8) - same | 44-QFN (8x8) - same | 44-QFN (8x8) - same | 44-QFN (8x8) - same |
| Core | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit |
| CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
| Flash | 32 KB | 64 KB | 128 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 1.5 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 3.0 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| DMA Controller | Yes | Yes | Yes | Yes | Yes | No |
Diferenciadores clave
- Core Independent Peripherals (CIPs) including DMA, CLC, and CWG (frente a PIC18LF45K22-I/ML)
- 12-bit ADC2 with hardware computation and oversampling (frente a PIC18LF45K40-I/ML)
- 1.8V–3.6V operation with sub-µA XLP sleep modes (frente a PIC18F45K42-E/ML)
Notas de diseño
Place 100 nF decoupling capacitors as close as possible to each Vdd pin pair (pins 11/20/31/40 on this 44-QFN package). For battery-powered designs, take advantage of the PMD (Peripheral Module Disable) registers to shut down unused peripherals before entering XLP sleep; this can drop standby current well below 1 µA when the ADC, comparators, and PWM are off. Estimated: with all peripherals disabled and the CPU in sleep, the LF K42 typically draws under 100 nA at 3.0 V per the Microchip PIC18(L)FxxK42 datasheet, but always validate on your board because leakage paths via I/O pull-ups or external RC networks can dominate.
Route the exposed thermal pad (EP) of the 44-QFN package to a continuous ground copper pour with at least 8 thermal vias to the inner/outer ground planes. Without proper EP soldering, the device may overheat at high CPU activity or when the ADC is sampling at high rates. Keep analog signal traces (ADC inputs, comparator inputs, DAC outputs) short and away from PWM/commutation traces to minimize digital switching noise coupling into sensitive analog channels; use a guard ring tied to analog ground around analog pin groups.
Do not connect the MCLR pin (RE3) directly to Vdd without a pull-up — RE3 is input-only on the K42 family and requires a 10 kΩ–47 kΩ pull-up plus a 100 nF cap to ground for clean resets. Conflicting PPS mappings are a common firmware bug: a peripheral can only own one pin at a time, and if you remap UART RX to the same pin as SPI SCK the device will fault. Always verify the PPS configuration in the MPLAB Code Configurator before lock-down. The 5-bit DAC is not a high-precision reference — use the FVR (Fixed Voltage Reference) or an external reference for accuracy-critical bias voltages.
When using the CWG (Complementary Waveform Generator) for motor or power-converter switching, add RC snubbers or gate resistors on the power MOSFETs to limit dV/dt ringing that could couple into nearby ADC traces. The 12-bit ADC2 supports oversampling at 1 Msps, but for the lowest noise floor keep ADC clock below 500 kHz and use the ADC dedicated analog Vdd/Vss pins rather than sharing digital supplies. If your application drives long cables or motors, add TVS diodes on comparator and ADC inputs to survive ESD/EFT events.
Información de cumplimiento
RoHS compliant per DigiKey and Mouser product pages. Standard 'E' temperature grade is -40°C to +125°C industrial; for AEC-Q100 qualified automotive variants in the same family, see Microchip's Q1 ordering options. Halogen-free status not explicitly stated in distributor data — set to 'unknown'.
