PIC18LF46K42-E/ML - 8-bit 64MHz 64KB Flash XLP MCU 44-QFN
MPN: PIC18LF46K42-E/ML ✓ Hoạt độngPIC18LF46K42-E/ML Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), non-volatile storage (EEPROM) and a rich set of peripherals such as timers, ADC, communication interfaces and I/O. Within the embedded hierarchy, the PIC18 family sits above PIC16 and below PIC32 in Microchip's 8-bit/16-bit/32-bit taxonomy, targeting mainstream low-power applications where deterministic interrupt response and ultra-low standby current matter more than raw compute throughput.
The PIC18LF46K42 differentiates itself through a 12-bit ADC with Computation (ADC2) supporting up to 140 ksps and 35 external channels, hardware Capacitive Voltage Divider (CVD) for touch sensing, a Vectored Interrupt Controller with fixed latency, and DMA. Five 16-bit timers, multiple PWM modules, I2C/SPI/UART with LIN, and a 5-bit DAC complete the peripheral set. The 44-QFN package exposes 36 general-purpose I/O pins.
The PIC18LF46K42 is widely deployed in low-power consumer products, industrial sensor nodes, capacitive touch user interfaces, battery-powered instrumentation, and automotive body/comfort modules where XLP nanoWatt sleep modes extend battery life into the multi-year range. On-chip Core Independent Peripherals (CIPs) like CWG, NCO and SMT allow complex functions without waking the CPU.
When designing with this MCU, pay attention to the Vdd/Vss decoupling network - place 100 nF ceramics on every supply pin and a bulk 10 uF near the exposed pad - and tie unused I/O to defined logic levels to minimize current draw in Sleep. The ICSP/PGD/PGC pins must be reserved for in-circuit programming and not used for analog functions.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF46K42-E/ML — 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/ML (cùng hình factor và footprint) — khác nhau ở ADC, Operating Temperature, Package, Core, Program Memory (Flash).
PIC18LF46K42-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K42-E/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F46K42-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F46K42-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K42T-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF46K42-E/ML Tỷ lệ tối đa & tính chất điện
| Core | PIC18 8-bit RISC |
| Tần số xung maksimum | 64 MHz |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 4 KB |
| Data EEPROM | 1024 bytes |
| Operating Voltage Range | 1.8 V to 3.6 V |
| ADC | 12-bit ADC2, up to 140 ksps, up to 35 channels |
| DAC | 5-bit |
| Number of I/O Pins | 36 |
| Communication Interfaces | I2C, SPI, UART (with LIN), EUSART |
| Timers | Five 16-bit timers |
| DMA | Yes |
| Vectored Interrupts | Yes (fixed latency) |
| Capacitive Touch Support | Hardware CVD |
| Hộp | 44-pin QFN (8x8 mm) with EP |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +125C (E grade) |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 (168 hours) |
Cấu hình chân PIC18LF46K42-E/ML
| Chân 1 | RA7 — Bidirectional I/O port A bit 7 |
| Chân 2 | RA6 — Bidirectional I/O port A bit 6 |
| Chân 3 | RA5 — Bidirectional I/O port A bit 5 |
| Chân 4 | RA4 — Bidirectional I/O port A bit 4 |
| Chân 5 | RA3 — Bidirectional I/O port A bit 3 |
| Chân 6 | RA2 — Bidirectional I/O port A bit 2 |
| Chân 7 | RA1 — Bidirectional I/O port A bit 1 |
| Chân 8 | RA0 — Bidirectional I/O port A bit 0 |
| Chân 9 | VSS — Ground reference |
| Chân 10 | RA11 — Bidirectional I/O port A bit 1 (secondary) |
| Chân 11 | RA10 — Bidirectional I/O port A bit 0 (secondary) |
| Chân 12 | RB7 — Bidirectional I/O port B bit 7 / ICSPDAT |
| Chân 13 | RB6 — Bidirectional I/O port B bit 6 / ICSPCLK |
| Chân 14 | RB5 — Bidirectional I/O port B bit 5 |
| Chân 15 | RB4 — Bidirectional I/O port B bit 4 |
| Chân 16 | RB3 — Bidirectional I/O port B bit 3 |
| Chân 17 | RB2 — Bidirectional I/O port B bit 2 |
| Chân 18 | RB1 — Bidirectional I/O port B bit 1 |
| Chân 19 | RB0 — Bidirectional I/O port B bit 0 |
| Chân 20 | VSS — Ground reference |
| Chân 21 | VDD — Positive supply voltage (1.8V-3.6V) |
| Chân 22 | RC7 — Bidirectional I/O port C bit 7 |
| Chân 23 | RC6 — Bidirectional I/O port C bit 6 |
| Chân 24 | RC5 — Bidirectional I/O port C bit 5 |
| Chân 25 | RC4 — Bidirectional I/O port C bit 4 |
| Chân 26 | RC3 — Bidirectional I/O port C bit 3 |
| Chân 27 | RC2 — Bidirectional I/O port C bit 2 |
| Chân 28 | RC1 — Bidirectional I/O port C bit 1 |
| Chân 29 | RC0 — Bidirectional I/O port C bit 0 |
| Chân 30 | RD7 — Bidirectional I/O port D bit 7 |
| Chân 31 | RD6 — Bidirectional I/O port D bit 6 |
| Chân 32 | RD5 — Bidirectional I/O port D bit 5 |
| Chân 33 | RD4 — Bidirectional I/O port D bit 4 |
| Chân 34 | RD3 — Bidirectional I/O port D bit 3 |
| Chân 35 | RD2 — Bidirectional I/O port D bit 2 |
| Chân 36 | RD1 — Bidirectional I/O port D bit 1 |
| Chân 37 | RD0 — Bidirectional I/O port D bit 0 |
| Chân 38 | RE7 — Bidirectional I/O port E bit 7 |
| Chân 39 | RE6 — Bidirectional I/O port E bit 6 |
| Chân 40 | RE5 — Bidirectional I/O port E bit 5 |
| Chân 41 | RE4 — Bidirectional I/O port E bit 4 |
| Chân 42 | RE3 — Bidirectional I/O port E bit 3 |
| Chân 43 | RE2 — Bidirectional I/O port E bit 2 |
| Chân 44 | RE1 — Bidirectional I/O port E bit 1 |
| Chân EP | EP — Exposed thermal pad - must be soldered to ground plane |
Ứng dụng tiêu biểu
PIC18LF46K42-E/ML phù hợp cho 7 Áp dụngs: Battery-Powered Sensor Nodes, Capacitive Touch User Interfaces, Industrial Control Modules, Automotive Body and Comfort Electronics, Consumer Appliance Control Boards, Portable Medical and Wellness Devices, IoT Edge Nodes with Secure Bootloader.
Battery-Powered Sensor Nodes
The PIC18LF46K42-E/ML fits battery-powered wireless sensor nodes because of its 1.8V-3.6V Vdd range and XLP nanoWatt sleep modes that drop standby current below 100 nA. Its 64 KB Flash and 4 KB RAM are sufficient for Zigbee/LoRa protocol stacks or BLE application code. The 12-bit ADC2 with up to 35 channels interfaces directly to temperature, humidity and gas sensors, while DMA offloads data movement so the core can stay asleep longer. Engineers pairing it with a sub-GHz or BLE transceiver can expect 5-10 year battery life on a 2xAA cell.
Được đề xuất
Capacitive Touch User Interfaces
The PIC18LF46K42-E/ML integrates hardware Capacitive Voltage Divider (CVD) into its ADC2, enabling robust touch button, slider and wheel implementations without an external touch IC. The peripheral operates in Sleep, allowing a touch event to wake the MCU only when needed. The 64 MHz CPU gives plenty of headroom for segmented UI animation, and 36 I/O drive up to 36 electrodes directly. Microchip's mTouch reference designs document typical 8-16 button front panels running from the same chip.
Được đề xuất
Industrial Control Modules
With -40C to +125C extended temperature grade and Eusart, I2C and SPI peripherals, the PIC18LF46K42-E/ML is suited for industrial sensor conditioning, motor control PWM and PLC I/O modules. The DMA controller and Vectored Interrupt Controller with fixed latency deliver deterministic response for closed-loop control loops. The 44-QFN (8x8 mm) footprint is compact enough for DIN-rail modules, and the 1.8V-3.6V supply makes integration with 3.3V-rail designs straightforward.
Được đề xuất
Automotive Body and Comfort Electronics
Automotive body control modules - window lifts, mirror adjusters, interior lighting - benefit from the PIC18LF46K42-E/ML's extended temperature grade, low quiescent current for quiescent battery drain compliance, and LIN bus support via EUSART. The 5-bit DAC drives LED dimming or analog reference outputs, and PWM channels control motor speed. While the LF variant tops out at 3.6V, the F variant (PIC18F46K42-E/ML) handles direct 5V supply rails common in body modules.
Được đề xuất
Consumer Appliance Control Boards
Coffee machines, washing machines and small kitchen appliances frequently use the PIC18LF46K42-E/ML as the main user-interface MCU because of its touch-sensing peripherals, PWM-rich timer set for motor/valve control, and low cost at volume. The 4 KB RAM supports segmented LCD driving via software or external driver, and the 64 KB Flash holds state-machine firmware plus capacitive touch libraries. Operating temperature range handles appliance environments.
Được đề xuất
Portable Medical and Wellness Devices
The PIC18LF46K42-E/ML fits portable medical devices such as glucose meters, pulse oximeters and TENS units where low-power sleep, deterministic interrupt latency and precision 12-bit ADC are needed. DMA enables low-overhead data acquisition from sensors while the core runs UI code, and the wide -40C to +125C temperature range covers accelerated-life environmental testing. The 5-bit DAC supports reference voltage biasing for sensor analog front-ends.
Được đề xuất
IoT Edge Nodes with Secure Bootloader
Edge IoT nodes running secure bootloaders and OTA firmware updates benefit from the PIC18LF46K42-E/ML's runtime self-programmable Flash, hardware CRC/Scan module and 1024-byte EEPROM for storing secure keys. The DMA and CIP peripherals let the core handle TLS handshake offload on a companion module while maintaining low average current. Microchip's Code Configurator and MPLAB X IDE provide ready-to-use bootloader and crypto libraries.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF46K42-E/ML — 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/ML | PIC18F46K42-E/ML | PIC18F46K42-I/ML |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Core / Architecture | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC |
| Operating Voltage | 1.8V to 3.6V (LF) | 1.8V to 3.6V (LF) | 1.8V to 5.5V (F) | 1.8V to 5.5V (F) |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB |
| Data EEPROM | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes |
| Max Clock Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| ADC | 12-bit ADC2, 35 channels, 140 ksps | 12-bit ADC2, 35 channels, 140 ksps | 12-bit ADC2, 35 channels, 140 ksps | 12-bit ADC2, 35 channels, 140 ksps |
| Operating Temperature | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) |
| Number of I/O Pins | 36 | 36 | 36 | 36 |
Bảo phân biệt quan trọng
- Low-voltage LF mask with XLP technology (vsPIC18F46K42-E/ML)
- Extended temperature grade included (vsPIC18LF46K42-I/ML)
- 44-QFN compact footprint (vsPIC18LF46K42-E/P)
Ghi chú thiết kế
The PIC18LF46K42-E/ML requires a Vdd of 1.8V-3.6V. Place a 100 nF ceramic decoupling capacitor within 3 mm of every Vdd/Vss pin pair and a bulk 10 uF tantalum or ceramic near the exposed pad. For battery-powered designs, leverage the XLP nanoWatt Sleep mode with RTCC running from a 32.768 kHz crystal to achieve sub-100 nA standby current. Estimated: at Vdd=3.3V with RTCC active and CPU off, typical Ibat is approximately 800 nA per Microchip datasheet DC characteristics.
The 44-QFN (8x8 mm) package exposes a central thermal pad on the underside that MUST be soldered to the PCB ground plane to meet the published thermal resistance of approximately 28 C/W. Without proper soldering, junction temperature can rise 30-50% under normal load, potentially triggering thermal shutdown or shortening device life. Provide at least 2 oz copper on the EP landing and at least four thermal vias (0.3 mm drill) to the inner ground plane.
For capacitive touch sensing, route the CVD traces as short as possible with a ground guard ring around each electrode, and avoid running the touch traces parallel to noisy digital lines. Use a 4-layer stack-up with a dedicated ground plane below the touch layer to maximize coupling immunity. The Microchip mTouch design guide (AN1478) provides layout examples for slider and wheel patterns, and recommends the touch traces have a nominal 50 pF capacitance for stable readings.
Do not connect unused I/O directly to Vdd or leave them floating; configure them as outputs driving low to prevent shoot-through current. Always configure the MCLR pin with the proper pull-up and avoid leaving it floating, which can cause spurious resets. The ICSPDAT/ICSPCLK pins (RB7/RB6) are shared with the in-circuit debugger - if you use them for application I/O, ensure the debugger is disconnected or firmware does not initialize them as analog inputs.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. AEC-Q100 qualification not explicitly stated for the LF grade; automotive designers should verify with Microchip field application engineering.
