PIC18LF55K42-I/MV - 8-Bit 64MHz 32KB Flash MCU | Microchip
料号： PIC18LF55K42-I/MV ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.1 | $4.10 |
| 10 | $3.78 | $37.80 |
| 100 | $3.42 | $342.00 |
| 500 | $3.05 | $1,525.00 |
| 1,000 | $2.71 | $2,710.00 |
PIC18LF55K42-I/MV 概述
直接替换替代料： PIC18LF55K42-I/MV ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18LF55K42-I/MV （相同外形与封装尺寸） ——差异在于 ADC, Package, DAC, Family, Comparators.
快速对比工具——选择替代料号进行并排对比：
PIC18LF55K42T-I/MV
✅ 直接替换✓ 有现货
$2.6 / 个
查看数据手册 →PIC18F55K42-I/MV
✅ 直接替换✓ 有现货
$0.86 / 个
查看数据手册 →PIC18LF45K42-I/MV
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC18LF47K42-I/MV
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.75 / 个
查看数据手册 →PIC18F55K42T-I/MV
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.65 / 个
查看数据手册 →PIC18LF46K42-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.4 / 个
查看数据手册 →PIC18LF55K42-I/MV 最大额定值与电气特性
| Core | PIC18 8-bit RISC |
| Family | PIC18 (XLP) 18K |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 B |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| Number of I/O Pins | 44 |
| 封装 | 48-pin UQFN EP (6x6 mm) |
| ADC | 12-bit (with computation) |
| DAC | Yes (5-bit / 8-bit) |
| Comparators | Yes |
| Timers / PWM | 8/16-bit timers with PWM, CWG |
| DMA | Yes |
| Vector Interrupts | Yes |
| 工作温度 | -40 C to +85 C (Industrial) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
PIC18LF55K42-I/MV 引脚配置
| 引脚 1 | RA0 — Port A bit 0 (analog/digital I/O) |
| 引脚 2 | RA1 — Port A bit 1 (analog/digital I/O) |
| 引脚 3 | RA2 — Port A bit 2 (analog/digital I/O) |
| 引脚 4 | RA3 — Port A bit 3 (analog/digital I/O) |
| 引脚 5 | RA4 — Port A bit 4 (analog/digital I/O) |
| 引脚 6 | RA5 — Port A bit 5 (analog/digital I/O) |
| 引脚 7 | RA6 — Port A bit 6 (analog/digital I/O) |
| 引脚 8 | RA7 — Port A bit 7 (analog/digital I/O) |
| 引脚 9 | VSS — Ground reference |
| 引脚 10 | VDD — Positive supply (1.8-3.6 V) |
| 引脚 11 | RB0 — Port B bit 0 (interrupt-on-change) |
| 引脚 12 | RB1 — Port B bit 1 (interrupt-on-change) |
| 引脚 13 | RB2 — Port B bit 2 (interrupt-on-change) |
| 引脚 14 | RB3 — Port B bit 3 (interrupt-on-change) |
| 引脚 15 | RB4 — Port B bit 4 (interrupt-on-change) |
| 引脚 16 | RB5 — Port B bit 5 (interrupt-on-change) |
| 引脚 17 | RB6 — Port B bit 6 (PGC/ICSP clock) |
| 引脚 18 | RB7 — Port B bit 7 (PGD/ICSP data) |
| 引脚 19 | RC0 — Port C bit 0 |
| 引脚 20 | RC1 — Port C bit 1 |
| 引脚 21 | RC2 — Port C bit 2 |
| 引脚 22 | RC3 — Port C bit 3 |
| 引脚 23 | RC4 — Port C bit 4 |
| 引脚 24 | RC5 — Port C bit 5 |
| 引脚 25 | RC6 — Port C bit 6 |
| 引脚 26 | RC7 — Port C bit 7 |
| 引脚 27 | VSS — Ground reference |
| 引脚 28 | VDD — Positive supply (1.8-3.6 V) |
| 引脚 29 | RD0 — Port D bit 0 |
| 引脚 30 | RD1 — Port D bit 1 |
| 引脚 31 | RD2 — Port D bit 2 |
| 引脚 32 | RD3 — Port D bit 3 |
| 引脚 33 | RD4 — Port D bit 4 |
| 引脚 34 | RD5 — Port D bit 5 |
| 引脚 35 | RD6 — Port D bit 6 |
| 引脚 36 | RD7 — Port D bit 7 |
| 引脚 37 | VSS — Ground reference |
| 引脚 38 | VDD — Positive supply (1.8-3.6 V) |
| 引脚 39 | RE0 — Port E bit 0 |
| 引脚 40 | RE1 — Port E bit 1 |
| 引脚 41 | RE2 — Port E bit 2 |
| 引脚 42 | RE3 — Port E bit 3 |
| 引脚 43 | MCLR — Master clear (reset, active low) |
| 引脚 44 | RF0 — Port F bit 0 |
| 引脚 45 | RF1 — Port F bit 1 |
| 引脚 46 | RF2 — Port F bit 2 |
| 引脚 47 | RF3 — Port F bit 3 |
| 引脚 48 | RF4 — Port F bit 4 |
典型应用
PIC18LF55K42-I/MV 适用于 7 应用s: Battery-Powered IoT Sensor Nodes, Consumer Appliance Control, Low-Power Handheld Instrumentation, White Goods and HVAC Fan Control, Smart Home Sensor Hubs, Industrial Control Front-Ends, Touch-Button and LED Lighting Controls.
Battery-Powered IoT Sensor Nodes
The PIC18LF55K42-I/MV is purpose-built for IoT sensor nodes that spend most of their life asleep. Its XLP nanoWatt technology delivers deep-sleep currents below 100 nA, and the 1.8 V minimum VDD pairs naturally with single-cell Li-ion or coin-cell batteries without a boost regulator. The 12-bit ADC with computation (ADC2) and DMA let the part wake, sample a sensor, average the result and return to sleep without waking the CPU - extending battery life by orders of magnitude versus polled designs.
推荐
Consumer Appliance Control
The PIC18LF55K42-I/MV suits consumer appliances such as coffee makers, washing machines and air purifiers, where 8-bit deterministic control is more important than raw compute. The vectored interrupts, 8/16-bit timers, PWM, and complementary waveform generator (CWG) support triac and motor control, while the 12-bit ADC reads temperature, pressure or flow sensors in real time. The 44 I/O pins leave headroom for keypads, displays and indicator LEDs on the same MCU.
推荐
Low-Power Handheld Instrumentation
Handheld meters, thermometers and multimeters benefit from the PIC18LF55K42-I/MV's small 6x6 mm UQFN footprint and low active current. The 12-bit ADC with computation and the on-chip DAC support analog signal conditioning for bridge, RTD or thermocouple sensors. The 32 KB Flash fits USB-CDC or UART command sets, while 2 KB SRAM handles display buffering and 256 B EEPROM stores calibration constants in-circuit.
推荐
White Goods and HVAC Fan Control
The PIC18LF55K42-I/MV drives brushless-DC and AC induction fan stages with its PWM, CWG and 12-bit ADC. Its 1.8-3.6 V VDD lets designers run the MCU directly from a regulated 3.3 V rail derived from the HVAC's 24 V supply. The 44 I/O support keypad input, triac firing, tachometer feedback and fault LEDs without external logic.
推荐
Smart Home Sensor Hubs
Smart-home bridges and PIR/zigbee sensor hubs use the PIC18LF55K42-I/MV as a low-power supervisor that wakes a higher-tier radio on activity. The DMA and 12-bit ADC2 with computation accelerate motion, light and temperature sensing, while the XLP sleep modes extend battery life to multi-year ranges. The UQFN EP package fits behind the PIR lens or on a coin-cell carrier board.
推荐
Industrial Control Front-Ends
Industrial PLC-style front-ends and process controllers deploy the PIC18LF55K42-I/MV to read 4-20 mA loops, switch relays and drive optocouplers. The vectored-interrupt controller and DMA keep deterministic response times for safety loops, and the -40 C to +85 C industrial rating meets the temperature envelope of factory-floor cabinets. The 32 KB Flash stores ladder logic or state-machine code with margin.
推荐
Touch-Button and LED Lighting Controls
Lighting controllers and capacitive touch-button panels leverage the PIC18LF55K42-I/MV's 12-bit ADC with computation, on-chip comparators and PWM channels. The DMA offloads LED dimming updates from the CPU, while the CWG and PWM drive MOSFETs for high-current LED strings. With 1.8 V minimum VDD the part can be powered from a small switching supply or USB bus.
推荐
推荐产品汇总
工程参考数据： PIC18LF55K42-I/MV ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18LF55K42T-I/MV | PIC18F55K42-I/MV | PIC18LF45K42-I/MV | PIC18LF47K42-I/MV |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-UQFN EP (6x6) | 48-UQFN EP (6x6) - same | 48-UQFN EP (6x6) - same | 48-UQFN EP (6x6) - same | 48-UQFN EP (6x6) - 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 | 1.8 V to 3.6 V |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| I/O Pins | 44 | 44 | 44 | 36 | 36 |
| Maximum Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| ADC | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 |
| DMA / CIPs | Yes (CIPs, DMA, DIA) | Yes (identical die) | Yes (identical die) | Yes (same K42 family) | Yes (same K42 family) |
关键差异点
- Wide 1.8-3.6 V supply range with XLP nanoWatt sleep （对比 PIC18F55K42-I/MV)
- 44 I/O on the smallest 6x6 mm UQFN footprint （对比 PIC18LF47K42-I/MV)
- Core Independent Peripherals (CIPs) + DMA offload the CPU （对比 PIC18LF25K83-I/ML)
设计说明
Place a 100 nF decoupling capacitor as close as possible to each VDD/VSS pair (pins 10/9, 28/27 and 38/37), and a bulk 1-10 uF near the supply pin cluster. The PIC18LF55K42-I/MV draws as little as 100 nA in deep-sleep, so leakage through the bulk capacitor's dielectric can dominate idle current - prefer X7R/X5R ceramics with low DC bias derating rather than Y5V.
The 48-pin UQFN EP package exposes a thermal pad on the underside; solder it to a continuous ground pour with at least four thermal vias to the inner ground plane. Without this, junction-to-ambient thermal resistance degrades significantly, especially at 64 MHz with all peripherals active. Keep the junction rise well under 30 C above ambient to stay within the -40 C to +85 C industrial rating.
Route the ICSP pins (RB6 = PGC, RB7 = PGD) directly to a 2x5 or 1x6 header for in-circuit programming. Keep the traces short and add a 10 kohm pull-up on MCLR (pin 43). Decouple MCLR with a 100 nF capacitor close to the pin to avoid spurious resets during ESD events.
The PIC18LF55K42-I/MV cannot exceed 3.6 V on any pin - if a 5 V peripheral is on the board, use the PIC18F55K42-I/MV (5 V-rated) instead. Also note that the analog input range on the 12-bit ADC shares the 0-VDD range; for rail-to-rail sensing of signals above VDD or below VSS, use the on-chip DAC and comparator path instead.
Keep analog traces (ADC inputs, DAC output, comparator reference) short and away from PWM/CWG outputs and clock lines. The K42 family is robust to mixed-signal routing, but a 10-20 mil ground trace between analog and digital sections plus a clean ground pour below the ADC reduces conversion noise. The exposed pad (EP) must be a single net (GND) for thermal and EMI reasons.
合规信息
RoHS compliant per Microchip product page. The 'I' industrial temperature suffix (-40 C to +85 C) is non-automotive; AEC-Q100 variants are not provided; choose automotive-qualified PIC18 parts if required.
