PIC18LF46K42T-I/MV - 64KB Flash XLP 8-bit MCU | Microchip
MPN: PIC18LF46K42T-I/MV ✓ Hoạt độngPIC18LF46K42T-I/MV Tóm tắt
What is a low-power 8-bit microcontroller? It is a microcontroller class that combines a Harvard-architecture 8-bit CPU, integrated peripherals, and aggressive sleep modes targeted at battery-powered or energy-harvesting embedded designs. Within the broader hierarchy, the PIC18LF46K42 sits as: 8-bit MCU -> PIC18 family -> PIC18Fxx_K42 sub-family -> low-power XLP variant. It typically appears below a 16-bit dsPIC or 32-bit Cortex-M0+ device in cost and complexity, but offers superior code density and interrupt response for straightforward control tasks.
Key features include eXtreme Low Power (XLP) technology with sub-uA sleep currents, the ADC2 with automated math and charge-pump operation, DMA for offloading core data movement, peripheral pin select (PPS) for flexible signal routing, and a wide operating voltage range of 1.8 V to 5.5 V (F-version supports down to 2.3 V). The integrated CVD module implements hardware capacitive touch sensing without an external analog front end.
The architecture pairs a RISC PIC18 core with separate program and data buses, 31-level hardware stack, vectored interrupts with priority levels, and Direct Memory Access between peripherals and memory, allowing background data movement while the CPU sleeps. This combination delivers deterministic real-time response at modest power budgets.
Typical applications include IoT sensor nodes, home appliances and white goods, capacitive touch human-machine interfaces, battery-powered handheld instruments, automotive body electronics (non-safety), and low-cost industrial control modules. The MV suffix denotes the tape-and-reel UQFN-40 5x5 mm package.
When designing with the PIC18LF46K42T-I/MV, verify PPS assignments early because each peripheral function must be mapped to a physical pin via software registers; mistakes here are a common source of bring-up failures. Also confirm the 1.8 V minimum for the LF variant - applying 1.8 V to the F-variant PIC18F46K42 will fail to start.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF46K42T-I/MV — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF46K42T-I/MV (cùng hình factor và footprint) — khác nhau ở DAC, Package, ADC, Comparators, Operating Temperature.
PIC18LF46K42-I/MV
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F46K42T-I/MV
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF46K40-I/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K42-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K42T-I/MV Tỷ lệ tối đa & tính chất điện
| Core Processor | PIC18 |
| Core Size | 8-bit |
| Tần số xung maksimum | 64 MHz |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 4 KB |
| Data EEPROM | 1 KB |
| ADC Resolution | 12-bit (ADC2) |
| Number of I/O Pins | 36 I/O |
| Điện áp cung cấp hoạt động | 1.8 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, 'I' suffix) |
| Kiểu lắp đặt | Surface Mount |
| Hộp | 40-pin UQFN (MV) 5x5 mm |
| Connectivity | I2C, LINbus, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, LVD, POR, PWM, WDT |
| DMA | 2-channel DMA |
| DAC | 5-bit DAC |
| Capacitive Touch | Hardware CVD (Charge pump) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC18LF46K42T-I/MV
| Chân 1 | RA5 — Port A bit 5 (I/O, also used for PPS functions) |
| Chân 2 | RA4 — Port A bit 4 (I/O) |
| Chân 3 | RA3 — Port A bit 3 (I/O) |
| Chân 4 | RA2 — Port A bit 2 (I/O) |
| Chân 5 | RA1 — Port A bit 1 (I/O, ICSPCLK) |
| Chân 6 | RA0 — Port A bit 0 (I/O, ICSPDAT) |
| Chân 7 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Chân 8 | VSS — Ground reference |
| Chân 9 | RA7 — Port A bit 7 (I/O, also OSC1) |
| Chân 10 | RA6 — Port A bit 6 (I/O, also OSC2) |
| Chân 11 | RC5 — Port C bit 5 (I/O) |
| Chân 12 | RC4 — Port C bit 4 (I/O) |
| Chân 13 | RC3 — Port C bit 3 (I/O, also SCL) |
| Chân 14 | RC2 — Port C bit 2 (I/O, also SDA) |
| Chân 15 | RC1 — Port C bit 1 (I/O, also CCP2) |
| Chân 16 | RC0 — Port C bit 0 (I/O, also CCP1) |
| Chân 17 | RC6 — Port C bit 6 (I/O, also TX) |
| Chân 18 | RC7 — Port C bit 7 (I/O, also RX) |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage |
| Chân 21 | RB0 — Port B bit 0 (I/O, also INT) |
| Chân 22 | RB1 — Port B bit 1 (I/O, also INT1) |
| Chân 23 | RB2 — Port B bit 2 (I/O) |
| Chân 24 | RB3 — Port B bit 3 (I/O, also MSSP/SPI) |
| Chân 25 | RB4 — Port B bit 4 (I/O) |
| Chân 26 | RB5 — Port B bit 5 (I/O) |
| Chân 27 | RB6 — Port B bit 6 (I/O, also ICSP clock) |
| Chân 28 | RB7 — Port B bit 7 (I/O, also ICSP data) |
| Chân 29 | RD0 — Port D bit 0 (I/O) |
| Chân 30 | RD1 — Port D bit 1 (I/O) |
| Chân 31 | RD2 — Port D bit 2 (I/O) |
| Chân 32 | RD3 — Port D bit 3 (I/O) |
| Chân 34 | RD4 — Port D bit 4 (I/O) |
| Chân 35 | RD5 — Port D bit 5 (I/O) |
| Chân 36 | RD6 — Port D bit 6 (I/O) |
| Chân 37 | RD7 — Port D bit 7 (I/O) |
| Chân 38 | RE3 — Port E bit 3 (I/O) |
| Chân 39 | VSS — Ground reference (bottom thermal pad) |
| Chân 40 | RE2 — Port E bit 2 (I/O) |
| Chân 33 | AVDD — Analog supply voltage |
Ứng dụng tiêu biểu
PIC18LF46K42T-I/MV phù hợp cho 6 Áp dụngs: IoT Sensor Nodes, Capacitive Touch Human-Machine Interfaces, Home Appliances and White Goods, Battery-Powered Handheld Instruments, Automotive Body Electronics (Non-Safety), Low-Cost Industrial Control Modules.
IoT Sensor Nodes
The PIC18LF46K42T-I/MV's XLP (eXtreme Low Power) technology and 1.8 V minimum VDD make it ideal for IoT sensor nodes powered by coin cells or energy harvesters. The 12-bit ADC2 with automated oversampling and threshold comparison enables battery voltage monitoring and sensor conditioning while the CPU stays in sleep, while the 2-channel DMA moves data from peripherals to RAM without waking the core. The 64 KB Flash supports protocol stacks such as LoRaWAN or BLE command shims, and the UQFN-40 5x5 mm package fits in sub-1 square inch PCB layouts typical of wireless sensor motes. Use this part when you need deterministic low-power operation with on-board analog conditioning for thermocouple, RTD, or environmental sensors.
Được đề xuất
Capacitive Touch Human-Machine Interfaces
The PIC18LF46K42T-I/MV's hardware Capacitive Voltage Divider (CVD) module implements capacitive touch sensing without an external analog front end or dedicated touch IC. Per the Microchip datasheet, CVD operates with an integrated charge pump, enabling reliable touch acquisition at low VDD and across harsh industrial noise environments. The combination of 35 ADC2 channels, DMA-driven touch scanning, and the 64 MHz CPU allows scanning of 16+ touch pads with millisecond response while keeping average current under 10 uA. The UQFN-40 package and surface-mount profile suit front-panel PCBs behind glass overlays. Pair this part with mechanically rugged touch pads and an FPC connector for a sealed HMI front panel.
Được đề xuất
Home Appliances and White Goods
The PIC18LF46K42T-I/MV's combination of 36 I/O, multiple PWM channels, 12-bit ADC2, and the extended peripheral set (I2C, SPI, UART, LINbus) directly supports white-goods motor control boards, washing machine user interfaces, induction cooktop controllers, and dishwasher control modules. The 'I' industrial temperature grade (-40 to +85 C) covers appliance and under-hood automotive body electronics environments, while the 1.8 V operation suits battery-backed RTC retention paths. Per Microchip application notes, the PPS (Peripheral Pin Select) feature simplifies board layout by remapping UART/SPI/PWM to alternate pins without board rework.
Được đề xuất
Battery-Powered Handheld Instruments
Handheld multimeters, portable data loggers, and field-test instruments benefit from the PIC18LF46K42T-I/MV's sub-uA sleep current and the ADC2 module's ability to operate while the CPU is in sleep. The integrated DMA offloads waveform capture or sensor sampling to the peripheral layer while the CPU idles, extending battery life by an order of magnitude over equivalent polling architectures. The 64 KB Flash stores calibration tables, custom menu strings, and measurement algorithms, while the 4 KB SRAM buffers instantaneous readings. Per the datasheet, the UQFN-40 5x5 mm package and -40 to +85 C industrial range suit both indoor lab and outdoor field use.
Được đề xuất
Automotive Body Electronics (Non-Safety)
For non-safety automotive body applications such as interior lighting, seat controllers, HVAC dampers, mirror adjusters, and accessory modules, the PIC18LF46K42T-I/MV offers LINbus connectivity, an extended PWM block, and -40 to +85 C industrial temperature grade. The 12-bit ADC2 handles multiple sensor inputs (temperature, position, current) with automated averaging, reducing software overhead. Designers should select the AEC-Q100 qualified PIC18F46K42T-E/MV variant for OEM body-electronics programs requiring automotive certification; the LF-variant suits aftermarket and accessory modules where industrial grade is acceptable.
Được đề xuất
Low-Cost Industrial Control Modules
The PIC18LF46K42T-I/MV serves well in PLC expansion modules, sensor transmitter boards, motor driver controllers, and industrial telemetry devices. The 12-bit ADC2 with 35 channels drives multi-sensor analog front ends, the PWM block drives stepper motor or LED driver stages, and the DMA-driven UART/SPI offloads fieldbus protocols like Modbus RTU. Per the Microchip PIC18Fxx_K42 datasheet, the device is rated for industrial-grade -40 to +85 C operation and supports sleep currents below 1 uA in RTCC-only mode. The UQFN-40 5x5 mm footprint enables compact DIN-rail module designs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF46K42T-I/MV — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18LF46K42-I/MV | PIC18LF46K42-I/PT | PIC18F46K42T-I/MV | PIC18LF46K40-I/MV | PIC18LF46K42-E/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | UQFN-40 (MV) 5x5 mm | UQFN-40 (MV) 5x5 mm - same | TQFP-44 (PT) 10x10 mm - different | UQFN-40 (MV) 5x5 mm - same | UQFN-40 (MV) 5x5 mm - same | UQFN-40 (MV) 5x5 mm - same |
| Program Memory (Flash) | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Data RAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Data EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Maximum Clock Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Minimum VDD | 1.8 V (LF variant) | 1.8 V | 1.8 V | 2.3 V (F-variant, +28%) | 1.8 V | 1.8 V |
| Operating Temperature | -40 C to +85 C (I-grade) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (extended) |
| ADC2 with Hardware CVD | Yes (35 channels) | Yes | Yes | Yes | No - K40 lacks ADC2/CVD | Yes |
| DMA Channels | 2 channels | 2 | 2 | 2 | None | 2 |
Bảo phân biệt quan trọng
- XLP eXtreme Low Power technology with sub-uA sleep currents (vsPIC18LF46K40-I/MV)
- ADC2 with hardware CVD for capacitive touch without external components (vsPIC18LF46K40-I/MV)
- Integrated 2-channel DMA offloads core data movement (vsPIC18LF46K40-I/MV)
- 1.8 V minimum VDD operation (LF prefix) (vsPIC18F46K42T-I/MV)
Ghi chú thiết kế
Per the Microchip PIC18Fxx_K42 datasheet, the LF variant operates from 1.8 V to 5.5 V. Use a 100 nF ceramic decoupling capacitor on each VDD/VSS pin pair placed within 5 mm of the pin, plus a bulk 10 uF tantalum or ceramic at the board supply entry. For low-power designs, route unused I/O as outputs driving low and disable unused peripherals via PMD registers to minimize leakage. The 'LF' prefix is mandatory if the design must start up at 1.8 V; the F-variant fails to start below 2.3 V.
The UQFN-40 5x5 mm package has an exposed thermal pad (EP) on the underside that MUST be soldered to the board ground plane for thermal dissipation and mechanical reliability. Per IPC-7351 nominal land pattern, allocate at least 4-6 thermal vias in the EP pad to a second-layer ground pour. Pin 1 identification is critical - the dot is on the top side as shown in the package outline; confirm with a polarizing feature on the PCB silk-screen before hand soldering prototypes.
Peripheral Pin Select (PPS) allows remapping most digital peripherals (UART, SPI, PWM, etc.) to alternate physical pins via software registers. Although this greatly simplifies PCB routing, errors in PPS configuration are a common cause of 'dead board' bring-up failures - always verify PPS unlock sequence (PPSLOCKED bit) and confirm the chosen pin supports the desired peripheral function. Analog functions such as the ADC2 and DAC are NOT remappable; these pins are fixed by silicon.
Common pitfalls include: (1) confusing LF and F variants in BOMs - LF starts at 1.8 V, F starts at 2.3 V; (2) forgetting the 100 nF + bulk cap requirement on VDD/VSS pairs, causing brown-out resets; (3) not enabling the FVR (Fixed Voltage Reference) before ADC2 calibration - calibration accuracy depends on FVR; (4) leaving ICSP pins (RB6/RB7) as analog inputs without disabling them via PPS, which prevents in-circuit programming; (5) forgetting to clear the GIE/PEIE bits before entering Sleep for power-sensitive applications.
The UQFN-40 package's tight 0.4 mm pitch demands clean reflow profiles - peak temperature 245 C for lead-free SAC-305 solder paste, with a soak time of 60-90 seconds above 220 C. Per IPC J-STD-020, the MSL rating for this package is MSL-3 at 250 C; vacuum-sealed parts have a floor-life of 168 hours after bag opening. For high-vibration environments, add corner staking epoxy to mitigate UQFN-EP thermal-fatigue failure modes.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial -40 to +85 C operating range ('I' suffix). AEC-Q100 not qualified - choose PIC18F46K42T-E/MV for automotive OEM. Refer to Microchip PIC18(L)FxxK42 family datasheet 40001919B for full compliance documentation.
