PIC18LF46J50-I/ML - 8-bit 48MHz USB MCU 64KB Flash | Microchip
MPN: PIC18LF46J50-I/ML ✓ فعالPIC18LF46J50-I/ML نمای کلی
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and peripherals such as timers, communication interfaces, and analog modules. 8-bit MCUs are widely used in cost-sensitive, deterministic embedded applications because of their simple instruction set, predictable interrupt latency, and low power consumption. The PIC18 architecture is an enhanced 8-bit core with a 16-bit instruction word, hardware multiplier, and linear addressing, sitting between traditional 8-bit controllers and more complex 16/32-bit devices. Within Microchip's portfolio, the PIC18LF46J50 belongs to the J-series, which adds full-speed USB, deep-sleep modes, and a wider voltage range.
Key features include on-chip full-speed USB 2.0 device/host/OTG, 36 digital I/O pins, multiple serial interfaces (UART, SPI, I2C), a 10-bit ADC with up to 13 channels, and nanoWatt XLP deep-sleep current in the nanoamp range. The 44-QFN package provides a small 8x8 mm footprint with an exposed thermal pad for improved heat dissipation, making it well-suited for space-constrained USB dongles, sensor hubs, and consumer peripherals.
Typical applications include USB HID peripherals such as keyboards, mice, and game controllers, USB-to-UART bridges, low-power sensor data loggers, and battery-powered IoT edge nodes. The wide 2.0-3.6V operating range and deep-sleep modes allow direct Li-ion or 2xAA battery operation while still supporting USB when plugged in.
When designing with this part, place the 44-QFN exposed pad over a continuous ground plane with multiple thermal vias to meet the package's thermal and electrical requirements. Decoupling capacitors must be placed as close as possible to the VDD/VSS pins and the VUSB pin, following the USB transceiver layout guidelines in the datasheet.
جایگزین‌های drop-in برای PIC18LF46J50-I/ML — 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 PIC18LF46J50-I/ML (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در ADC, Package, Timers, Operating Temperature, Core.
PIC18LF46J50T-I/ML
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F46J50-I/ML
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18LF46J50-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18LF46J53-I/ML
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF46K40-I/ML
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18LF46J50-I/ML حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | PIC18 (8-bit) |
| Series | PIC® XLP™ 18J |
| Maximum CPU Frequency | 48 MHz |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 4 KB |
| Operating Voltage Range | 2.0 V to 3.6 V |
| I/O Pins | 36 |
| USB Interface | USB 2.0 Full-Speed (Device/Host/OTG) |
| ADC | 10-bit |
| بسته‌بندی | 44-QFN (8x8 mm) with exposed pad |
| نوع نصب | Surface Mount |
| دمای کاری | -40C to +85C (industrial) |
| سطح MSL | 3 (168 hours) |
| وضعیت RoHS | Compliant |
| Lead-Free | Yes |
پیکربندی پین PIC18LF46J50-I/ML
| پین 1 | RB5/KBI1/PGM — PORTB bit 5 / Keyboard interrupt / ICSP programming |
| پین 2 | RB4/AN11/KBI0 — PORTB bit 4 / ADC input 11 / Keyboard interrupt |
| پین 3 | RB3/AN9/CCP2 — PORTB bit 3 / ADC input 9 / Capture/Compare/PWM |
| پین 4 | RB2/AN8/CCP1 — PORTB bit 2 / ADC input 8 / Capture/Compare/PWM |
| پین 5 | RB1/AN10 — PORTB bit 1 / ADC input 10 |
| پین 6 | RB0/AN12/FLT0 — PORTB bit 0 / ADC input 12 / PWM fault input |
| پین 7 | VSS — Ground reference |
| پین 8 | VDD — Positive power supply (2.0V to 3.6V) |
| پین 9 | RA0/AN0 — PORTA bit 0 / ADC input 0 |
| پین 10 | RA1/AN1 — PORTA bit 1 / ADC input 1 |
| پین 11 | RA2/AN2/VREF- — PORTA bit 2 / ADC input 2 / ADC reference minus |
| پین 12 | RA3/AN3/VREF+ — PORTA bit 3 / ADC input 3 / ADC reference plus |
| پین 13 | RA4/AN4 — PORTA bit 4 / ADC input 4 |
| پین 14 | RA5/AN5 — PORTA bit 5 / ADC input 5 |
| پین 15 | VSS — Ground reference |
| پین 16 | OSC1/RA7 — Oscillator input / PORTA bit 7 |
| پین 17 | OSC2/RA6 — Oscillator output / PORTA bit 6 |
| پین 18 | RC0/SOSCO — PORTC bit 0 / Secondary oscillator output |
| پین 19 | RC1/SOSCI — PORTC bit 1 / Secondary oscillator input |
| پین 20 | RC2/CCP2 — PORTC bit 2 / Capture/Compare/PWM 2 |
| پین 21 | RC3/SCL — PORTC bit 3 / I2C clock |
| پین 22 | RC4/SDA — PORTC bit 4 / I2C data |
| پین 23 | RC5 — PORTC bit 5 |
| پین 24 | RC6/TX1/CK1 — PORTC bit 6 / UART1 TX / USART clock |
| پین 25 | RC7/RX1/DT1 — PORTC bit 7 / UART1 RX / USART data |
| پین 26 | VUSB — USB transceiver internal 3.3V regulator output (bypass cap required) |
| پین 27 | D- — USB differential data minus |
| پین 28 | D+ — USB differential data plus |
| پین 29 | RD0/PSP0 — PORTD bit 0 / Parallel slave port data |
| پین 30 | RD1/PSP1 — PORTD bit 1 / Parallel slave port data |
| پین 31 | RD2/PSP2 — PORTD bit 2 / Parallel slave port data |
| پین 32 | RD3/PSP3 — PORTD bit 3 / Parallel slave port data |
| پین 33 | RD4/PSP4 — PORTD bit 4 / Parallel slave port data |
| پین 34 | RD5/PSP5 — PORTD bit 5 / Parallel slave port data |
| پین 35 | RD6/PSP6 — PORTD bit 6 / Parallel slave port data |
| پین 36 | RD7/PSP7 — PORTD bit 7 / Parallel slave port data |
| پین 37 | RE0/RD — PORTE bit 0 / Parallel slave port read |
| پین 38 | RE1/WR — PORTE bit 1 / Parallel slave port write |
| پین 39 | RE2/CS — PORTE bit 2 / Parallel slave port chip select |
| پین 40 | VDD — Positive power supply (2.0V to 3.6V) |
| پین 41 | VSS — Ground reference |
| پین 42 | RF1/AN6/C2OUT — PORTF bit 1 / ADC input 6 / Comparator 2 output |
| پین 43 | RF2/AN7/C1OUT — PORTF bit 2 / ADC input 7 / Comparator 1 output |
| پین 44 | EP — Exposed thermal pad - must be soldered to ground plane |
کاربردهای معمول
PIC18LF46J50-I/ML مناسب است برای 6 کاربردs: USB HID Peripheral (Keyboard/Mouse), USB-to-UART Bridge / CDC Device, Battery-Powered IoT Sensor Node, USB Barcode Scanner / Data Logger, USB Audio Class Device (Headset Dongle), USB Firmware Bootloader Host.
USB HID Peripheral (Keyboard/Mouse)
The PIC18LF46J50-I/ML is an ideal host for USB HID peripherals because of its integrated USB 2.0 full-speed transceiver, 64 KB Flash for HID descriptors and keymap tables, and 36 GPIO pins for matrix key scanning. At 48 MHz the CPU executes the USB polling interval with substantial headroom for key debouncing, LED animation, and backlight PWM. The nanoWatt XLP deep-sleep mode lets a wireless keyboard sleep in nanoamp currents and wake on interrupt to extend battery life across months of standby.
پیشنهادی
USB-to-UART Bridge / CDC Device
The integrated USB 2.0 full-speed transceiver and 4 KB RAM make the PIC18LF46J50-I/ML a natural fit for USB-to-UART bridge adapters and CDC virtual COM port designs. The 48 MHz core handles USB protocol stack plus UART DMA streaming with minimal CPU loading. Compared to dedicated bridge ICs, this part offers programmable baud rates, custom IO commands, and the ability to upgrade firmware in-field via the USB bootloader, all in a compact 44-QFN footprint ideal for USB dongles.
پیشنهادی
Battery-Powered IoT Sensor Node
With 2.0-3.6V operation and nanoWatt XLP deep-sleep current in the nanoamp range, the PIC18LF46J50-I/ML runs directly from a single Li-ion or 2xAA battery cell while still supporting USB when plugged in for charging or data transfer. The 10-bit ADC samples up to 13 analog sensor channels, and 64 KB Flash accommodates application firmware plus USB stacks. The 36 GPIO pins handle multiple sensors, I2C peripherals, and a status LED, all in an 8x8 mm QFN suitable for wearables and remote sensor pods.
پیشنهادی
USB Barcode Scanner / Data Logger
The PIC18LF46J50-I/ML serves as the controller for USB-connected barcode scanners and portable data loggers, leveraging its 64 KB Flash for image-decoding firmware and 4 KB RAM for scan buffering. The integrated USB device interface presents as a HID keyboard or CDC serial device to the host without external ICs, reducing BOM and PCB area. Industrial -40C to +85C temperature rating supports warehouse and cold-chain logistics deployments.
پیشنهادی
USB Audio Class Device (Headset Dongle)
The PIC18LF46J50-I/ML can implement USB Audio Class 1.0 device firmware for low-cost USB headset adapters, with the 48 MHz core providing enough bandwidth for isochronous USB audio at 16-bit/48 kHz alongside basic volume control logic. The 44-QFN exposed pad handles thermal dissipation cleanly in a sealed dongle enclosure. GPIO pins drive mute buttons and status LEDs without external glue logic.
پیشنهادی
USB Firmware Bootloader Host
The PIC18LF46J50-I/ML is commonly deployed as a USB host bootloader for in-field firmware updates of PIC18-based sensor or motor nodes. The integrated USB host/OTG controller plus 64 KB Flash holds both the USB stack and the bootloader image simultaneously, while the 10-bit ADC verifies supply rails before handoff to the application. The wide 2.0-3.6V supply range lets the same hardware run from USB VBUS or a battery.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18LF46J50-I/ML — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18LF46J50T-I/ML | PIC18F46J50-I/ML | PIC18LF46J50-I/PT | PIC18LF46J53-I/ML | PIC18LF46K40-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-TQFP - same die, different land pattern | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 64 MHz |
| Program 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 | 16 KB |
| USB 2.0 Interface | Integrated FS Device/Host/OTG | Integrated FS - same | Integrated FS - same | Integrated FS - same | Integrated FS - same | None (K-series drop USB) |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 12-bit |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 1.8 V to 3.6 V |
تفاوت‌های کلیدی
- Integrated USB 2.0 full-speed transceiver with on-chip pull-up (در مقابلPIC18LF46K40-I/ML)
- True drop-in tape-and-reel production variant in same 44-QFN package (در مقابلPIC18LF46J50T-I/ML)
- nanoWatt XLP deep-sleep current for battery-powered USB designs (در مقابلPIC18LF46K40-I/ML)
یادداشت‌های طراحی
The 44-QFN (ML) package requires the central exposed thermal pad to be soldered to a continuous ground plane with at least 9 thermal vias (0.3 mm drill, 0.6 mm pitch) for proper thermal and electrical performance. Per the Microchip PIC18LF46J50 datasheet section on package guidelines, missing vias under the EP will void the thermal rating and can cause erratic oscillator behavior. Keep the GND pour unbroken under the EP and stitch it to the bottom ground plane.
Place the 100 nF VDD/VSS decoupling capacitors as close as possible (less than 3 mm trace length) to each power pin pair. Add a 4.7 uF bulk capacitor on the main VDD rail and a 220 nF capacitor on the VUSB pin output, as recommended in the Microchip PIC18LF46J50 datasheet USB hardware design notes. The USB D+ and D- traces must be 90 ohm differential, length-matched within 2 mm, and routed over an unbroken ground plane to meet USB 2.0 full-speed signal-integrity requirements.
Do not float the VUSB pin - it must have a decoupling capacitor even if USB is not used, otherwise the internal 3.3V USB regulator can oscillate and inject noise into VDD. When USB is unused, tie D+ and D- to ground through 10k resistors. The LF suffix denotes the 2.0-3.6V low-voltage variant; do not substitute a non-LF J50 without re-checking brown-out and voltage-tolerance settings for battery-powered designs.
اطلاعات انطباق
RoHS and REACH compliance per Microchip product page; lead-free reflow profile per JEDEC J-STD-020. The I-temp (-40C to +85C) variant is industrial-grade; no AEC-Q100 automotive grade is available for this exact MPN.
