PIC18LF46K42-E/PT - 8-Bit 64MHz MCU, 64KB Flash, 44-TQFP | Microchip
N.º da peça: PIC18LF46K42-E/PT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.1 | $3,10 |
| 10 | $2.83 | $28,30 |
| 100 | $2.3 | $230,00 |
| 500 | $1.95 | $975,00 |
| 1.000 | $1.72 | $1.720,00 |
PIC18LF46K42-E/PT Visão geral
Background: A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash), volatile data memory (RAM), EEPROM for persistent data, programmable I/O, and on-chip peripherals such as timers, ADC, communication interfaces, and DMA controllers. The PIC18 family uses an 8-bit modified Harvard RISC core optimized for deterministic execution and low interrupt latency; it sits between PIC16 (smaller 8-bit) and PIC24/dsPIC (16-bit) in Microchip's portfolio. Modern PIC18 K-series devices add Core Independent Peripherals (CIPs) that run without CPU intervention, enabling deterministic real-time behavior.
Key features include 12-bit ADC with Computation (ADCC) oversampling, 5-/8-bit DAC, high-speed comparators with DAC reference, DMA controller for CPU-offload data movement, vectored interrupts, Configurable Logic Cell (CLC), Complementary Waveform Generator (CWG), 16-bit PWM, math accelerator, and a windowed watchdog timer. Communication peripherals cover I2C, SPI, UART with LIN-bus, and the 36 I/O pins tolerate 5V inputs even on the 3.3V LF part.
Typical applications include industrial sensor nodes, home appliances, low-power IoT endpoints, automotive body and lighting subsystems, consumer HMI, and USB-CDC/HID peripherals. The TQFP-44 footprint is breadboard-friendly and supported by Curiosity Nano (DM182020) and Explorer 8 development boards, with MPLAB X IDE, XC8 compiler, and MPLAB Code Configurator (MCC) for rapid code generation.
Design consideration: when migrating to the LF variant (1.8-3.6V) confirm any 5V sensors or signal levels, because LF pins are 5V-tolerant only as inputs; use the F variant (PIC18F46K42) for 5V supply. This page synthesizes drop-in TQFP-44 alternatives, parametric comparisons, and design notes not present on the manufacturer product page.
Alternativas drop-in para PIC18LF46K42-E/PT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC18LF46K42-E/PT (mesmo formato e footprint) — diferindo em ADC, DAC, Package, EEPROM, Operating Temperature.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18LF46K42-I/PT
✅ Drop-In✓ Em estoque
$2.4 / unidade
Ver ficha técnica →PIC18F46K42-E/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F46K42-I/PT
✅ Drop-In✓ Em estoque
$1.89 / unidade
Ver ficha técnica →PIC18LF46Q10-I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F46K22-I/PT
✅ Drop-In✓ Em estoque
$2.32 / unidade
Ver ficha técnica →PIC18F46Q10-I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.55 / unidade
Ver ficha técnica →PIC18LF46K42-E/PT Classificações máximas e características elétricas
| Core Architecture | PIC18 (8-bit modified Harvard RISC) |
| CPU Speed (Max) | 64 MHz |
| Flash Program Memory | 64 KB (32K x 16) |
| Data RAM | 4 KB |
| EEPROM | 256 bytes |
| Operating Voltage Range | 1.8 V to 3.6 V |
| Number of I/O Pins | 36 |
| ADC | 12-bit ADC with Computation (ADCC) |
| DMA Channels | Yes (on-chip) |
| Communication Interfaces | I2C, SPI, UART (with LIN), EUSART |
| Timers | 8-/16-bit timers, 16-bit PWM |
| Faixa de temperatura de operação | -40 C to +125 C (Extended, "-E") |
| Encapsulamento | 44-pin TQFP (10x10 mm) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| XLP Technology | Yes (nanoWatt sleep currents) |
| Peripheral Highlights | CLC, CWG, 5-/8-bit DAC, math accelerator, windowed WDT |
Configuração de pinos do PIC18LF46K42-E/PT
| Pino 1 | RA0 — Bidirectional I/O / analog AN0 / CVD touch |
| Pino 2 | RA1 — Bidirectional I/O / analog AN1 |
| Pino 3 | RA2 — Bidirectional I/O / analog AN2 / DAC1 output |
| Pino 4 | RA3 — Bidirectional I/O / analog AN3 / Vref- |
| Pino 5 | RA4 — Bidirectional I/O / analog AN4 |
| Pino 6 | RA5 — Bidirectional I/O / analog AN5 |
| Pino 7 | RA6 — Bidirectional I/O / analog AN6 |
| Pino 8 | RA7 — Bidirectional I/O / analog AN7 |
| Pino 9 | RB0 — Bidirectional I/O / analog AN8 / INT0 |
| Pino 10 | RB1 — Bidirectional I/O / analog AN9 / INT1 |
| Pino 11 | RB2 — Bidirectional I/O / analog AN10 |
| Pino 12 | RB3 — Bidirectional I/O / analog AN11 |
| Pino 13 | RB4 — Bidirectional I/O / analog AN12 |
| Pino 14 | RB5 — Bidirectional I/O / analog AN13 |
| Pino 15 | RB6 — Bidirectional I/O / ICSPCLK |
| Pino 16 | RB7 — Bidirectional I/O / ICSPDAT |
| Pino 17 | VSS — Ground reference |
| Pino 18 | VDD — Positive supply (1.8V-3.6V) |
| Pino 19 | RC0 — Bidirectional I/O / analog AN16 |
| Pino 20 | RC1 — Bidirectional I/O / analog AN17 |
| Pino 21 | RC2 — Bidirectional I/O / analog AN18 |
| Pino 22 | RC3 — Bidirectional I/O / analog AN19 / SCL1 |
| Pino 23 | RC4 — Bidirectional I/O / analog AN20 / SDA1 |
| Pino 24 | RC5 — Bidirectional I/O / analog AN21 |
| Pino 25 | RC6 — Bidirectional I/O / TX1 |
| Pino 26 | RC7 — Bidirectional I/O / RX1 |
| Pino 27 | RE0 — Bidirectional I/O / analog AN5 (alt) |
| Pino 28 | RE1 — Bidirectional I/O / analog AN6 (alt) |
| Pino 29 | RE2 — Bidirectional I/O / analog AN7 (alt) |
| Pino 30 | RE3 — Bidirectional I/O / analog AN8 (alt) |
| Pino 31 | AVSS — Analog ground |
| Pino 32 | AVDD — Analog positive supply |
| Pino 33 | RD0 — Bidirectional I/O / INT0 (alt) |
| Pino 34 | RD1 — Bidirectional I/O / INT1 (alt) |
| Pino 35 | RD2 — Bidirectional I/O |
| Pino 36 | RD3 — Bidirectional I/O |
| Pino 37 | RD4 — Bidirectional I/O |
| Pino 38 | RD5 — Bidirectional I/O |
| Pino 39 | RD6 — Bidirectional I/O |
| Pino 40 | RD7 — Bidirectional I/O |
| Pino 41 | VSS — Ground reference |
| Pino 42 | OSC1 — Crystal oscillator input |
| Pino 43 | OSC2 — Crystal oscillator output |
| Pino 44 | MCLR — Master clear / reset (active low) |
Aplicações típicas
PIC18LF46K42-E/PT é adequado para 7 aplicaçãos: Low-Power IoT Sensor Nodes, Industrial Sensor and Control Modules, Home Appliance User Interfaces, Automotive Body and Lighting Modules, Consumer Electronics and HMI, USB HID Peripherals (Keyboards, Mice, Custom Input), LED Lighting and Signage Controllers.
Low-Power IoT Sensor Nodes
The PIC18LF46K42-E/PT is built for battery-powered wireless sensor nodes where months-to-years of operation from a single CR2032 or two AA cells is required. Its 1.8V-3.6V LF supply rails match a 3.3V system directly from a Li-ion or 2xAA stack without boost converters, while XLP nanoWatt sleep currents below 100 nA keep idle drain negligible. The 12-bit ADCC with Computation oversampling reads sensors (temperature, humidity, gas) at 1.8V while filtering in hardware, freeing the CPU to remain in sleep. DMA moves the converted ADC result into RAM without waking the core, and a low-power timer wakes the part periodically. The 36 I/O handle SPI/I2C sensor buses plus GPIO for LEDs and user interfaces. Typical battery life exceeds 5 years on a 2400 mAh AA pair when duty-cycled at 1%.
Recomendado
Industrial Sensor and Control Modules
PIC18LF46K42-E/PT drives industrial 4-20 mA loop-powered transmitters, process controllers, and HVAC actuators where deterministic timing and industrial-grade temperature tolerance are mandatory. The -E grade operates to +125C junction, surviving factory-floor enclosures and motor-drive proximity. CLC (Configurable Logic Cell) synthesises custom glue logic - debouncers, sequence interlocks, edge detectors - in hardware, replacing discrete 74-series logic. CWG (Complementary Waveform Generator) produces dead-band-corrected complementary PWM for half-bridge drivers in motor and solenoid control, while the 16-bit PWM provides precise PWM resolution for proportional valves and LED dimming. UART with LIN bus enables LIN 2.x slave connectivity for building-automation subnets. Hardware DMA offloads ADC-to-port transfers, letting the CPU execute PID loops or comms.
Recomendado
Home Appliance User Interfaces
Home appliances (washing machines, dishwashers, refrigerators, ovens, coffee makers) demand capacitive-touch sensing, multi-LED indication, low standby power, and robust 50 Hz / 60 Hz mains-noisy environments. PIC18LF46K42-E/PT fits through the mTouch CVD (Charge-Voltage Divider) peripheral that converts any I/O pin into a capacitive-touch electrode without external components, supporting buttons, sliders, and wheels. The CWG generates zero-crossing-detection-aware TRIAC gate pulses for AC line control of heaters and pumps without extra logic. XLP sleep currents below 100 nA maintain regulatory standby limits (<0.5 W) for Energy Star appliances. The 4 KB RAM handles small RTOS tasks or washing-cycle state machines, while 64 KB Flash holds application code and a USB bootloader. The extended temperature grade survives oven-door or compressor-compartment mounting.
Recomendado
Automotive Body and Lighting Modules
PIC18LF46K42-E/PT powers body-electronics controllers such as door modules, seat controllers, mirror adjusters, RGB interior lighting, and HVAC blend-door actuators. With the -E extended grade to +125C, it tolerates cabin and door-mounted environments with significant thermal rise. LIN-bus UART integrates directly into the LIN 2.x body-electronics network that connects door, seat, and roof modules to the central BCM (Body Control Module), eliminating the need for a standalone LIN controller IC. The CLC and CWG peripherals run LIN signalling sequences and PWM-controlled LED lighting in hardware, while the 16-bit PWM drives high-resolution RGB color mixing with anti-flicker dithering. The DMA engine moves LIN frame buffers between UART and RAM without CPU load, leaving MIPS for application logic. For AEC-Q100 qualification, request the automotive -VAO suffix from Microchip.
Recomendado
Consumer Electronics and HMI
PIC18LF46K42-E/PT is well-suited for consumer Human-Machine Interface (HMI) boards such as remote controls, e-bike displays, point-of-sale terminals, gaming peripherals, and small kitchen appliances. Its 12-bit ADCC reads potentiometers and joystick positions at 1.8V supply with hardware averaging, and the math accelerator offloads FFTs and DSP-style filtering for audio feedback. mTouch CVD enables capacitive buttons and sliders without external components, while the CWG generates backlight PWM for LCD or OLED displays. USB HID class is implementable in software over UART + external USB transceiver, supporting keyboards, mice, and game controllers. The 36 I/O drives LCD segments, key matrices, and rotary encoders directly, while 64 KB Flash holds USB stacks and feature-rich application firmware. XLP sleep modes keep battery-powered remotes alive for years.
Recomendado
USB HID Peripherals (Keyboards, Mice, Custom Input)
PIC18LF46K42-E/PT implements USB HID-class peripherals when paired with an external USB Full-Speed transceiver such as the MCP2221A. The 64 KB Flash comfortably holds USB HID stacks, HID report descriptors, and application logic for keyboards, mice, presentation clickers, custom joysticks, and barcode scanners. Hardware DMA offloads HID endpoint memory transfers, ensuring glitch-free mouse motion and keyboard typing without CPU intervention. The 12-bit ADCC scans capacitive touch sliders and mechanical encoders, while CLC synthesizes debouncing and edge detection in hardware. The math accelerator performs AES-style encryption for secure peripherals, and the 16-bit PWM drives RGB underglow / status LEDs with anti-aliasing dithering. XLP sleep current below 100 nA extends wireless-peripheral battery life, and -40 to +125C tolerance enables outdoor or automotive cabin use.
Recomendado
LED Lighting and Signage Controllers
PIC18LF46K42-E/PT drives addressable LED strips (WS2812B, APA102, SK6812) and DMX-512 stage lighting fixtures through its SPI/UART peripherals plus DMA. The 16-bit PWM provides high-resolution color mixing for architectural and entertainment lighting, while the CWG generates precise dead-time-corrected waveforms for buck/boost LED driver ICs. The CLC implements pixel-protocol timing in hardware, freeing CPU cycles for color algorithms and audio-reactive effects. With 64 KB Flash and 4 KB RAM, the MCU stores complex lighting scenes, schedules, and animations; DMX-512 frame buffering is handled by DMA. The LF (1.8V-3.6V) supply directly powers from 3.3V LED driver rails. The -40 to +125C extended grade withstands outdoor signage enclosures and stage lighting thermal loads.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF46K42-E/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18LF46K42-I/PT | PIC18F46K42-E/PT | PIC18LF46Q10-I/PT | PIC18F46K22-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (10x10 mm) | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V |
| CPU Speed | 64 MHz (16 MIPS) | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Flash / RAM / EEPROM | 64 KB / 4 KB / 256 B | 64 KB / 4 KB / 256 B | 64 KB / 4 KB / 256 B | 64 KB / 4 KB / 256 B | 64 KB / 4 KB / 1 KB |
| I/O Pins | 36 | 36 | 36 | 36 | 36 |
| Temperature Grade | -40C to +125C (Extended, -E) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| DMA / CIP Highlights | DMA + CLC + CWG + ADCC | DMA + CLC + CWG + ADCC | DMA + CLC + CWG + ADCC | DMA + CLC + CWG + ADCC (newer gen) | No DMA, fewer CIPs |
| Approx Unit Price (qty 1) | $3.10 USD | ~$3.00 USD | ~$3.20 USD | ~$3.30 USD | ~$3.50 USD |
Principais diferenciais
- Low-voltage LF supply rail down to 1.8V (vs PIC18F46K42-E/PT)
- Modern Core Independent Peripherals with DMA (vs PIC18F46K22-I/PT)
- Extended -40C to +125C temperature grade (vs PIC18LF46K42-I/PT)
- XLP nanoWatt sleep current below 100 nA (vs PIC18F46K22-I/PT)
Notas de projeto
Place a 1uF-10uF ceramic bypass capacitor (X7R, low-ESR) as close as possible to the VDD/VSS pins to suppress switching noise from the digital core and ADC. Add a separate AVSS/AVDD filter network (10 ohm + 10uF) for the analog supply rail when using the 12-bit ADC or comparators to ensure ADC accuracy within 1 LSB. The LF variant operates 1.8V-3.6V; do NOT connect 5V to VDD on the LF version - use the PIC18F46K42-E/PT instead for 5V supply rails.
Route the ICSPDAT and ICSPCLK signals (RB6/RB7) directly to a 6-pin header for in-circuit programming without interfering with the application circuitry. Keep the crystal traces (OSC1/OSC2) short (under 5 mm) and surrounded by a ground guard ring to reduce EMI. Place the MCLR pull-up (10 kohm typical) close to the MCLR pin; add a 100 nF cap to VSS if long MCLR traces pick up noise.
Do not exceed 3.6V on any VDD pin of the LF variant or risk permanent damage - LF pins are 5V-tolerant only as inputs. The PIC18LF46K42-E/PT requires explicit configuration-bit selection of oscillator mode, watchdog timer, brown-out reset, and code protection; do not rely on default values. When migrating from PIC18F46K22 to PIC18LF46K42, update the configuration words for the new clock and peripheral mapping, and verify the ADC reference voltage is configured for the new 1.8V-3.6V supply range.
At maximum operating temperature +125C ambient (extended grade), the TQFP-44 package (typical theta-JA ~50 C/W on 2-layer JEDEC PCB) dissipates only ~1W reliably. The PIC18LF46K42-E/PT draws approximately 10-15 mA at 64 MHz, so internal dissipation stays below 50 mW and thermal design is rarely a constraint. For applications with sustained 100% CPU load at +125C ambient, increase PCB copper area around the IC or downgrade to the Industrial (-I) grade.
Informações de conformidade
RoHS compliant per Microchip product page. AEC-Q100 qualification requires automotive -VAO suffix - standard PIC18LF46K42-E/PT is extended-temp grade only. Halogen-free per Microchip green-compliance documentation.