PIC18LF46K42-E/MV - 8-Bit 64MHz MCU 64KB Flash 40-UQFN
MPN: PIC18LF46K42-E/MV ✓ Hoạt độngPIC18LF46K42-E/MV Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable peripherals on one die. The PIC18 is a 8-bit RISC-architecture family from Microchip; the LF prefix denotes the low-voltage (1.8 V to 3.6 V) variant, while XLP (eXtreme Low Power) adds nanoWatt sleep modes. The K42 generation introduces Core Independent Peripherals (CIPs), on-chip DMA, and vectored interrupts, representing the evolution from earlier PIC18F K22 / K40 generations in the same category hierarchy: MCU -> microcontroller -> 8-bit microcontroller -> PIC18 -> PIC18 K42.
Key features include a 12-bit ADC2 with computation, a 5-bit/8-bit DAC, two comparators with slope compensation, a Complementary Waveform Generator (CWG), 10-bit PWM with multiple time bases, and Peripheral Pin Select (PPS) for flexible signal routing. A Direct Memory Access (DMA) controller transfers data between memory and peripherals without CPU intervention, and a Hardware Limit Timer (HLT), Windowed Watchdog Timer (WWDT), and CRC/SCAN improve functional safety.
Typical applications include battery-powered IoT sensor nodes, low-power motor control loops, automotive body and lighting ECUs, USB-C and wireless charging front panels, and human-machine interface (HMI) boards that benefit from 36 user I/O and the integrated peripherals.
When designing with this part, ensure Vdd is decoupled with a 100 nF ceramic plus bulk capacitor near the package; the MV UQFN-40 exposed pad must be soldered to a copper pour of at least 25 mm squared to keep junction temperature within spec at full 64 MHz operation.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes - including thermal and DMA caveats - that you will not find in the bare manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF46K42-E/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 PIC18LF46K42-E/MV (cùng hình factor và footprint) — khác nhau ở Package, Program Memory (Flash), ADC, Comparators, Core Architecture.
PIC18LF46K40-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K22-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F46K42-E/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF46K42-I/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF46K42T-E/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF46K42-E/MV Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC18 RISC |
| Family | PIC18F K42 (XLP) |
| Maximum CPU Clock | 64 MHz |
| Program Memory (Flash) | 64 KB |
| Data SRAM | 4 KB |
| Data EEPROM | 1 KB |
| Supply Voltage (Vdd) | 1.8 V to 3.6 V |
| Nhiệt độ hoạt động | -40 C to +125 C (E = Extended) |
| Hộp | 40-pin UQFN (5x5 mm) (MV) |
| I/O Pins | 36 |
| ADC | 12-bit ADC2 with computation |
| DAC | 5-bit / 8-bit DAC |
| Comparators | 2 with slope compensation |
| PWM Channels | 10-bit, multiple time bases, CWG |
| Connectivity | I2C, SPI, UART/USART, LIN bus support |
| Special Features | DMA, vectored interrupts, PPS, WWDT, CRC/SCAN, ZCD, HLT |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF46K42-E/MV
| Chân 1 | MCLR — Master clear / reset input |
| Chân 2 | RA0 — PORTA bit 0 (PPS-capable) |
| Chân 3 | RA1 — PORTA bit 1 (PPS-capable) |
| Chân 4 | RA2 — PORTA bit 2 (PPS-capable) |
| Chân 5 | RA3 — PORTA bit 3 (PPS-capable) |
| Chân 6 | RA4 — PORTA bit 4 (PPS-capable) |
| Chân 7 | RA5 — PORTA bit 5 (PPS-capable) |
| Chân 8 | RA6 — PORTA bit 6 (PPS-capable) |
| Chân 9 | RA7 — PORTA bit 7 (PPS-capable) |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply 1.8-3.6 V |
| Chân 12 | RB0 — PORTB bit 0 (PPS-capable, INT0) |
| Chân 13 | RB1 — PORTB bit 1 (PPS-capable, INT1) |
| Chân 14 | RB2 — PORTB bit 2 (PPS-capable) |
| Chân 15 | RB3 — PORTB bit 3 (PPS-capable) |
| Chân 16 | RB4 — PORTB bit 4 (PPS-capable) |
| Chân 17 | RB5 — PORTB bit 5 (PPS-capable) |
| Chân 18 | RB6 — PORTB bit 6 (PPS-capable, ICSP programming clock) |
| Chân 19 | RB7 — PORTB bit 7 (PPS-capable, ICSP programming data) |
| Chân 20 | VSS — Ground reference |
| Chân 21 | VDD — Positive supply 1.8-3.6 V |
| Chân 22 | RC0 — PORTC bit 0 (PPS-capable) |
| Chân 23 | RC1 — PORTC bit 1 (PPS-capable) |
| Chân 24 | RC2 — PORTC bit 2 (PPS-capable) |
| Chân 25 | RC3 — PORTC bit 3 (PPS-capable) |
| Chân 26 | RC4 — PORTC bit 4 (PPS-capable) |
| Chân 27 | RC5 — PORTC bit 5 (PPS-capable) |
| Chân 28 | RC6 — PORTC bit 6 (PPS-capable, TX) |
| Chân 29 | RC7 — PORTC bit 7 (PPS-capable, RX) |
| Chân 30 | VSS — Ground reference |
| Chân 31 | VDD — Positive supply 1.8-3.6 V |
| Chân 32 | RD0 — PORTD bit 0 (PPS-capable) |
| Chân 33 | RD1 — PORTD bit 1 (PPS-capable) |
| Chân 34 | RD2 — PORTD bit 2 (PPS-capable) |
| Chân 35 | RD3 — PORTD bit 3 (PPS-capable) |
| Chân 36 | RD4 — PORTD bit 4 (PPS-capable) |
| Chân 37 | RD5 — PORTD bit 5 (PPS-capable) |
| Chân 38 | RD6 — PORTD bit 6 (PPS-capable) |
| Chân 39 | RD7 — PORTD bit 7 (PPS-capable) |
| Chân 40 | RE3 — PORTE bit 3 (input only, MCLR alternate) |
| Chân EP | EP — Exposed thermal pad (must be soldered to VSS pour) |
Ứng dụng tiêu biểu
PIC18LF46K42-E/MV phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Nodes, Low-Power BLDC Motor Control, Automotive Body and Lighting ECUs, Human-Machine Interface (HMI) Boards, USB-C and Wireless Charging Front Panels, Industrial Sensor Transmitters (4-20 mA Loop).
Battery-Powered IoT Sensor Nodes
The PIC18LF46K42-E/MV is ideal for battery-powered IoT sensor nodes because its 1.8 V to 3.6 V Vdd range allows direct connection to single-cell Li-Ion or two AA cells, while XLP nanoWatt sleep currents below 50 nA extend coin-cell life to years. The 12-bit ADC2 with computation performs autonomous sensor readings without waking the CPU, and the on-chip DMA streams data to RAM at 64 MHz without instruction overhead. Place the MCU between a CR2032 cell and a sub-GHz radio; its low sleep current maximizes battery life while DMA-driven ADC sampling preserves real-time responsiveness. Trade-off: choose the LF variant only when Vdd stays at or below 3.6 V - otherwise specify the PIC18F46K42-E/MV.
Được đề xuất
Low-Power BLDC Motor Control
The PIC18LF46K42-E/MV fits low-power BLDC motor control loops because its Complementary Waveform Generator (CWG), 10-bit PWM with multiple time bases, and two comparators with slope compensation implement sensorless trapezoidal commutation in hardware. At 64 MHz the MCU closes the current loop in under 2 us, while DMA offloads ADC2 conversions to RAM, freeing CPU cycles for UART/I2C telemetry. Drop the part between the gate driver (e.g. MCP8024) and a 3-phase MOSFET bridge; the CWG handles dead-time insertion automatically. Quantified benefit: hardware commutation reduces firmware complexity by ~40% versus pure-software PWM on older PIC18F K22.
Được đề xuất
Automotive Body and Lighting ECUs
The PIC18LF46K42-E/MV is well-suited to automotive body and lighting ECUs because its extended -40 C to +125 C operating range, PWM with CWG, and LIN bus support (UART with LIN protocol) integrate body-control functions without external ICs. The 12-bit ADC2 reads multiple thermistor and Hall-sensor inputs via DMA, while vectored interrupts minimize ISR latency for safety-critical lighting transitions. Use it as the master MCU on an interior lighting node paired with a CAN/LIN transceiver such as MCP2515 or ATA663231. Trade-off: for AEC-Q100 Grade 0 (150 C) under-hood designs, choose the VAO-suffixed variant - the standard E is industrial-grade only.
Được đề xuất
Human-Machine Interface (HMI) Boards
The PIC18LF46K42-E/MV drives compact HMI boards thanks to its 36 user I/O pins, which connect directly to multiplexed LED matrices, keypads, and segment LCDs, plus a 5-bit/8-bit DAC for analog contrast or backlight control. The Peripheral Pin Select (PPS) feature lets designers reassign UART/SPI/I2C to any I/O without board rework, dramatically simplifying the PCB. The 12-bit ADC2 with hardware averaging reads up to 35 analog touch/light sensors concurrently. Quantified benefit: PPS alone removes ~25% of routing constraints compared to fixed-pin PIC18 K40 designs.
Được đề xuất
USB-C and Wireless Charging Front Panels
The PIC18LF46K42-E/MV suits USB-C and wireless charging front panels because its 64 KB Flash accommodates USB-PD negotiation state machines, while the 12-bit ADC2 monitors Vbus voltage and current with hardware oversampling for accurate power measurement. DMA moves ADC samples to RAM, freeing the CPU for I2C communication with a PD controller like the FUSB302. The 1.8 V to 3.6 V Vdd range matches direct Li-Ion operation. Quantified benefit: DMA-driven ADC2 reaches 200 ksps aggregate throughput, sufficient for 100 kHz PWM-driven Qi charging loops.
Được đề xuất
Industrial Sensor Transmitters (4-20 mA Loop)
The PIC18LF46K42-E/MV fits 4-20 mA industrial sensor transmitters because its 12-bit ADC2 with computation performs square-root extraction and linearization in hardware, while the 5-bit/8-bit DAC and PWM drive a Howland current pump for the loop output. XLP sleep modes below 1 uA satisfy HART-compliant quiescent current budgets, and the extended -40 C to +125 C range covers outdoor field installations. Pair it with an MCP6002 op-amp for the current pump and an ISO122 isolation barrier. Trade-off: at 4 mA loop current the MCU has only ~3 mA budget - leverage nanoWatt XLP sleep aggressively.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF46K42-E/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 | PIC18LF46K40-E/MV | PIC18LF46K22-E/MV | PIC18F46K42-E/MV | PIC18LF46K42-I/MV | PIC18LF46K42T-E/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-UQFN (5x5 mm) MV | 40-UQFN (5x5 mm) MV - same | 40-UQFN (5x5 mm) MV - same | 40-UQFN (5x5 mm) MV - same | 40-UQFN (5x5 mm) MV - same | 40-UQFN (5x5 mm) MV - same |
| Core / Frequency | 8-bit PIC18 / 64 MHz | 8-bit PIC18 / 64 MHz | 8-bit PIC18 / 64 MHz | 8-bit PIC18 / 64 MHz | 8-bit PIC18 / 64 MHz | 8-bit PIC18 / 64 MHz |
| Flash / SRAM / EEPROM | 64 KB / 4 KB / 1 KB | 64 KB / 4 KB / 1 KB | 64 KB / 3.8 KB / 1 KB | 64 KB / 4 KB / 1 KB | 64 KB / 4 KB / 1 KB | 64 KB / 4 KB / 1 KB |
| Vdd Range | 1.8 V to 3.6 V | 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 | 1.8 V to 3.6 V |
| Operating Temperature | -40 C to +125 C (E) | -40 C to +125 C (E) | -40 C to +125 C (E) | -40 C to +125 C (E) | -40 C to +85 C (I) | -40 C to +125 C (E) |
| ADC | 12-bit ADC2 + DMA | 10-bit ADC, no DMA | 10-bit ADC, no DMA | 12-bit ADC2 + DMA | 12-bit ADC2 + DMA | 12-bit ADC2 + DMA |
| DMA + PPS | Yes (DMA + PPS) | No DMA / no PPS | No DMA / no PPS | Yes (DMA + PPS) | Yes (DMA + PPS) | Yes (DMA + PPS) |
| RoHS / Lead-Free | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
| Approx. 100-pc Price (USD) | $2.71 | $2.60 (est.) | $2.45 (est.) | $2.85 (est.) | $2.65 (est.) | $2.71 (est.) |
Bảo phân biệt quan trọng
- 12-bit ADC2 with hardware computation and DMA offload (vsPIC18LF46K40-E/MV)
- Lower Vdd range enables direct coin-cell or 1.8 V operation (vsPIC18F46K42-E/MV)
- Extended -40 C to +125 C temperature range for industrial/automotive (vsPIC18LF46K42-I/MV)
Ghi chú thiết kế
Estimated: Place one 100 nF 0402 ceramic bypass capacitor within 3 mm of each Vdd pin (11, 21, 31) and one bulk 4.7 uF near the 40-UQFN exposed pad. Solder the EP to a continuous Vss pour of at least 25 mm squared to keep theta_JA within the 28 C/W datasheet figure - skipping this raises junction temperature 25-40 C at 64 MHz and may trigger thermal shutdown in closed enclosures.
XLP nanoWatt sleep currents below 50 nA require the ICSPDAT/ICSPCLK pins (RB6/RB7) to be configured as outputs or inputs with the WPU disabled - otherwise leakage through internal pull-ups adds 5-15 uA. Use PPS to remap peripherals away from RB6/RB7 in production firmware to fully exploit the XLP current budget during deep sleep.
When using the 12-bit ADC2 above 100 ksps aggregate, route analog traces (ANx) over a continuous ground pour and keep them at least 3 mm away from PWM or CWG traces. The DMA-driven ADC2 can inject switching noise into analog inputs via ground bounce; a 1 kHz RC low-pass (10 kohm + 100 nF) on each analog pin reduces sampling artifacts by ~6 dB. Reference: Microchip AN2640 'ADC Layout Practices'.
Do not enable the internal HFINTOSC at 64 MHz without first verifying Vdd >= 2.7 V; the K42 datasheet specifies HFINTOSC high-power mode requires Vdd >= 2.7 V. Running 64 MHz at 1.8 V causes unreliable Flash reads and brown-out resets. Use the LF-INTOSC at 1.8 V or step up to the F variant (PIC18F46K42-E/MV, 2.3 V min).
MCLR (pin 1) must have a 10 kohm pull-up to Vdd and a 100 nF cap to ground for noise immunity; an exposed MCLR will intermittently reset in noisy motor-control environments. For ICSP programming, route ICSPCLK (RB6) and ICSPDAT (RB7) directly to a 6-pin header with no series resistors - the PICKit4 programmer provides internal drive and pulls.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. The E suffix denotes extended temperature -40 C to +125 C (industrial/automotive) but is NOT AEC-Q100 qualified; for AEC-Q100 Grade 0/1 automotive qualification, choose the VAO- or EP-suffixed variants.
