PIC18LF45K42T-I/PT - 8-bit 64MHz 32KB Flash MCU | Microchip
MPN: PIC18LF45K42T-I/PT ✓ فعالPIC18LF45K42T-I/PT نمای کلی
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and a rich set of peripherals such as ADC, timers, communication interfaces and interrupt controllers. PIC18F/LF devices sit in Microchip's mid-range 8-bit portfolio, with the K42 generation extending the line by adding vectored interrupts, DMA, math accelerator (MAC), device information area (DIA) and configurable logic cells. The K42 hierarchy is: PIC18 MCU -> 8-bit PIC -> microcontroller -> embedded computing -> semiconductor.
Key features include 36 general-purpose I/O pins, a 12-bit ADC with computation, a 5-bit DAC, two comparators, multiple PWM/SCCP modules, vector interrupts with a fixed-latency context save, DMA-capable peripherals and zero-cross detection. The XLP (eXtreme Low Power) technology typically delivers <50 nA sleep current with RTC retention, enabling multi-year battery life in duty-cycled applications.
The K42 architecture employs a 14-bit instruction word with an 8-bit data path and a hardware multiplier, plus an internal 64 MHz HFINTOSC accurate to within +/-2 percent across temperature and voltage. Peripheral pin select (PPS) remaps most digital functions to a wide choice of I/O pins, simplifying PCB routing.
Typical applications include industrial sensor interfaces, low-power IoT end nodes, USB-CDC or UART bridges, battery-powered home-automation controllers, automotive body and lighting subsystems, motor control (BLDC driver companion), and consumer appliances requiring capacitive touch and 12-bit analog front-ends.
When designing with this part, ensure your firmware toolchain (MPLAB X IDE with XC8 compiler or MPLAB XC8 PRO) supports the K42 family and that you leverage the PPS mapping tables in the datasheet to avoid pin conflicts. For deep-sleep RTC retention, use the RTCC with an external 32.768 kHz crystal to achieve the lowest power budget.
This page consolidates distributor pricing, parametric-equivalent alternatives and design considerations not available on any single manufacturer or distributor page, providing a one-stop engineering reference for the PIC18LF45K42T-I/PT.
جایگزین‌های drop-in برای PIC18LF45K42T-I/PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC18LF45K42T-I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, ADC, DAC, Operating Temperature, Core.
PIC18LF45K42-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18LF45K42T-I/ML
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF46K42T-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF45K42-E/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF45K40T-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF44K22T-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF45K42T-I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core | PIC18 (8-bit) |
| Instruction Set Width | 14-bit |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 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 | 36 |
| ADC | 12-bit, multiple channels |
| DAC | 5-bit |
| Comparators | 2 |
| دمای کاری | -40 C to +85 C (Industrial) |
| بسته‌بندی | 44-pin TQFP (10x10 mm) |
| نوع نصب | Surface Mount (SMD/SMT) |
| Packaging | Tape & Reel |
| سطح MSL | 3 (per JEDEC J-STD-020) |
| وضعیت RoHS | Compliant |
| Peripheral Highlights | Vector interrupts, DMA, CLC, CCP/PWM, math accelerator, PPS, RTCC |
پیکربندی پین PIC18LF45K42T-I/PT
| پین 1 | RA0 — Bidirectional I/O / analog channel AN0 |
| پین 2 | RA1 — Bidirectional I/O / analog channel AN1 |
| پین 3 | RA2 — Bidirectional I/O / analog channel AN2 |
| پین 4 | RA3 — Bidirectional I/O / analog channel AN3 / reference voltage |
| پین 5 | RA4 — Bidirectional I/O / analog channel AN4 |
| پین 6 | RA5 — Bidirectional I/O / analog channel AN5 |
| پین 7 | RA6 — Bidirectional I/O / oscillator output |
| پین 8 | RA7 — Bidirectional I/O / oscillator input |
| پین 9 | VSS — Ground reference |
| پین 10 | VDD — Positive supply (1.8 V - 3.6 V for LF) |
| پین 11 | RB0 — Bidirectional I/O / interrupt-on-change |
| پین 12 | RB1 — Bidirectional I/O / interrupt-on-change |
| پین 13 | RB2 — Bidirectional I/O / interrupt-on-change |
| پین 14 | RB3 — Bidirectional I/O / interrupt-on-change |
| پین 15 | RB4 — Bidirectional I/O / interrupt-on-change |
| پین 16 | RB5 — Bidirectional I/O / interrupt-on-change |
| پین 17 | RB6 — Bidirectional I/O / ICSP clock |
| پین 18 | RB7 — Bidirectional I/O / ICSP data |
| پین 19 | RC0 — Bidirectional I/O |
| پین 20 | RC1 — Bidirectional I/O |
| پین 21 | RC2 — Bidirectional I/O |
| پین 22 | RC3 — Bidirectional I/O / SCL (default) |
| پین 23 | RC4 — Bidirectional I/O / SDA (default) |
| پین 24 | RC5 — Bidirectional I/O |
| پین 25 | RC6 — Bidirectional I/O / UART TX (default) |
| پین 26 | RC7 — Bidirectional I/O / UART RX (default) |
| پین 27 | VSS — Ground reference |
| پین 28 | VDD — Positive supply |
| پین 29 | RD0 — Bidirectional I/O |
| پین 30 | RD1 — Bidirectional I/O |
| پین 31 | RD2 — Bidirectional I/O |
| پین 32 | RD3 — Bidirectional I/O |
| پین 33 | RD4 — Bidirectional I/O |
| پین 34 | RD5 — Bidirectional I/O |
| پین 35 | RD6 — Bidirectional I/O |
| پین 36 | RD7 — Bidirectional I/O |
| پین 37 | RE0 — Bidirectional I/O |
| پین 38 | RE1 — Bidirectional I/O |
| پین 39 | RE2 — Bidirectional I/O |
| پین 40 | RE3 — Bidirectional I/O |
| پین 41 | VSS — Ground reference |
| پین 42 | VDD — Positive supply |
| پین 43 | RF0 — Bidirectional I/O |
| پین 44 | RF1 — Bidirectional I/O |
کاربردهای معمول
PIC18LF45K42T-I/PT مناسب است برای 7 کاربردs: Industrial Sensor Interface & Data Acquisition, Battery-Powered IoT End Node, Automotive Body and Lighting Controller, Consumer Appliance with Capacitive Touch UI, USB-CDC / UART Bridge & Debug Probe, Motor Control - BLDC Fan / Pump Companion, Smart Home Edge Controller.
Industrial Sensor Interface & Data Acquisition
The PIC18LF45K42T-I/PT's 12-bit ADC with computation, 36 I/O, vector interrupts and 2 KB SRAM make it a strong fit for multi-channel industrial sensor aggregation nodes. In a typical 4-20 mA loop or thermocouple interface board it reads up to 30 analog inputs through external muxes and provides linearization, cold-junction compensation and oversampling via the ADC2 hardware. The 64 MHz CPU executes FFT/IIR filter steps in real time, and the DMA engine offloads UART/SPI transfers to peripherals so the core stays in XLP sleep between samples.
پیشنهادی
Battery-Powered IoT End Node
The 'LF' low-voltage variant of the PIC18LF45K42T-I/PT operates from 1.8 V to 3.6 V and adds Microchip's XLP technology for sub-50 nA sleep currents with RTCC retention. Combined with an integrated 12-bit ADC, 5-bit DAC, 64 MHz CPU and 32 KB Flash, the device is ideal for coin-cell LoRa/Sigfox end nodes that spend >99% of their duty cycle in deep sleep. The peripheral pin select (PPS) enables flexible routing of UART, SPI and I2C to any digital pin, simplifying antenna-switch control and sensor bus multiplexing.
پیشنهادی
Automotive Body and Lighting Controller
The PIC18LF45K42T-I/PT is well suited for low-speed automotive body controllers when paired with an external CAN/LIN transceiver such as the MCP2517FD or MCP2003B. Its 12-bit PWM, complementary output generator, dead-band control and zero-cross detection simplify LED matrix dimming and H-bridge motor control for window lifters or mirror adjusters. The -E/PT extended-temperature variant handles under-hood thermal stress up to +125 C, and the on-chip DMA keeps the CAN/LIN bus responsive during ADC scans.
پیشنهادی
Consumer Appliance with Capacitive Touch UI
PIC18LF45K42T-I/PT's 36 I/O, configurable logic cells (CLC) and built-in comparators are ideal for a consumer appliance's capacitive-touch and rotary encoder front-end. The mTouch peripheral via CVD acquisition drives up to 24 touch pads with hardware-driven scans, while the DMA-fed PWM module handles silent BLDC fan control and triac-fired heater dimming. The 64 MHz CPU delivers responsive UI feedback (sub-30 ms touch latency) without leaving the low-power sleep envelope between user interactions.
پیشنهادی
USB-CDC / UART Bridge & Debug Probe
With its 64 MHz CPU and ample 2 KB SRAM, the PIC18LF45K42T-I/PT can serve as a low-cost USB-to-UART/I2C/SPI bridge for PC-based debugging. Combined with an external MCP2221A USB bridge, the MCU handles command parsing, scripting and protocol conversion at >1 Mbaud while running custom device firmware. The peripheral pin select (PPS) lets the same firmware map debug UART, SWDIO and GPIO tracers to any combination of pins, accelerating bring-up on power-rail or sensor prototypes.
پیشنهادی
Motor Control - BLDC Fan / Pump Companion
The PIC18LF45K42T-I/PT's PWM/SCCP peripherals with complementary outputs, dead-band control and 12-bit ADC with computation make it an ideal companion MCU to a discrete BLDC pre-driver. The device runs sensorless BEMF zero-cross detection via its analog comparators, computes commutation timing, and streams telemetry to a higher-level control processor. DMA transfers the ADC result ring buffer to RAM in background, leaving the core free for the speed-control loop and stall detection.
پیشنهادی
Smart Home Edge Controller
A PIC18LF45K42T-I/PT can act as a smart-home edge aggregator, polling Zigbee/Z-Wave sensors over UART, running local rules in 32 KB Flash, and posting events over Wi-Fi via an external ATWINC1500 or ESP32. The 12-bit ADC and 5-bit DAC are useful for analog sensor channels (light, gas), while the on-chip comparators enable zero-cross dimming of incandescent and LED loads. XLP deep sleep at <50 nA extends coin-cell life to multi-year durations for battery-powered door/window sensors and TRVs.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18LF45K42T-I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18LF45K42-I/PT | PIC18LF45K42T-I/ML | PIC18LF46K42T-I/PT | PIC18LF45K42-E/PT | PIC18LF45K40T-I/PT | PIC18LF44K22T-I/PT |
|---|---|---|---|---|---|---|---|
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | QFN-44 (8x8 mm) | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 64 KB (+100%) | 32 KB | 16 KB (-50%) | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 4 KB (+100%) | 2 KB | 2 KB | 1.5 KB (-25%) |
| Operating Voltage | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V |
| Maximum CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Temperature Grade | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| Peripheral Family | K42 (CLC, MAC, vector interrupts) | K42 (same) | K42 (same) | K42 (same) | K42 (same) | K40 (no CLC/MAC) | K22 (older, no DMA) |
| Approximate Unit Price (1-pc) | $4.42 | Similar (~$4.30) | Similar (~$4.40) | Higher (~$5.10) | Higher (~$5.50, extended temp) | Lower (~$3.95) | Lower (~$3.85) |
تفاوت‌های کلیدی
- K42 architecture adds vector interrupts, DMA, CLC and math accelerator (در مقابلPIC18LF44K22T-I/PT)
- 12-bit ADC with computation versus 10-bit on legacy K22 family (در مقابلPIC18LF44K22T-I/PT)
- 32 KB Flash with 64 MHz throughput versus K40's 16 KB (در مقابلPIC18LF45K40T-I/PT)
یادداشت‌های طراحی
Estimated: At 64 MHz CPU + ADC + 1 active UART, the PIC18LF45K42T-I/PT typically draws 8 mA to 12 mA from VDD; in deep sleep with RTCC running the XLP current drops to <50 nA per the Microchip datasheet. Always include a 100 nF decoupling cap on each VDD/VSS pair (three pairs in TQFP-44) plus a bulk 4.7 uF near the IC; for low-noise analog add a ferrite bead in series with VDD before the analog-supply pin. Ensure VDD never exceeds 3.6 V (LF limit) or the silicon is permanently damaged.
For the 44-pin TQFP (10x10 mm, 0.8 mm pitch), use 4 mil trace/space routing and place at least one via-in-pad GND stitch per quadrant for thermal dissipation. Expose the IC's exposed thermal pad (if present on the K42 ML variant) to a 5x5 mm copper pour on the top layer stitched with at least four thermal vias to the inner GND plane. For mixed-signal designs, separate analog (AN0-AN5, RE0-RE3) and digital I/O with a GND moat to keep ADC SNR above 70 dB.
Do not assume 'LF' is interchangeable with 'F': the LF variant fails above 3.6 V, so a 5 V rail must use the PIC18F45K42T-I/PT variant. The peripheral pin select (PPS) lock-on-write requires unlocking via IOLOCK before reconfiguration; firmware that does not handle this will hang after the first PPS change. ICD 3 / PICkit 4 programmers need an MCU variant matching the K42 family; older PICkits may report a device ID mismatch if the silicon revision is newer than the toolchain database.
Keep ADC traces shorter than 30 mm and avoid routing them parallel to PWM outputs to prevent digital noise coupling; use a guarded analog ground connected back to the VSS pin adjacent to the analog AVdd pin. For capacitive touch channels, surround each pad with a ground hatch and add a small series resistor (1 kohm) to limit ESD surge. The internal HFINTOSC is factory trimmed to within +/-2% across -40 C to +85 C but degrades above +85 C; for accurate UART timing consider an external 16 MHz crystal.
اطلاعات انطباق
RoHS compliant per Microchip product page and DigiKey/Mouser listings. Lead-free (Pb-free) reflow profile per JEDEC J-STD-020 MSL-3. Not AEC-Q100 qualified - choose PIC18LF45K42-E/PT for automotive extended-temperature designs.