PIC18LF46J50T-I/ML - 8-bit 48MHz USB MCU 64KB Flash | Microchip
MPN: PIC18LF46J50T-I/ML ✓ فعالPIC18LF46J50T-I/ML نمای کلی
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, peripherals, and I/O. The PIC18 family from Microchip uses a modified Harvard RISC architecture with 16-bit opcodes and 8-bit data, optimized for deterministic interrupt response and low power. The J-series sub-family adds nanoWatt XLP technology for deep sleep currents in the nanoamp range, ideal for battery-powered and energy-harvesting designs.
Key features include a full-speed USB 2.0 device/host/OTG transceiver, 64 KB self-programmable Flash with 4 KB RAM, 13 ADC channels with 10-bit resolution, multiple PWM/Capture/Compare modules, and 36 digital I/O pins. The device includes a real-time clock calendar, two analog comparators, and a charge time measurement unit (CTMU) for capacitive touch sensing. The 8-bit modified Harvard RISC core executes most instructions in one cycle, achieving up to 16 MIPS throughput at 48 MHz.
Typical applications include USB peripherals, touch-sensitive user interfaces, low-power wireless sensor nodes, industrial control interfaces, and portable medical devices. USB connectivity eliminates external transceivers in HID-class designs such as mice, keyboards, and data loggers.
Design considerations: the exposed thermal pad on the QFN package must be soldered to a ground plane for electrical and thermal performance. Use Microchip's MPLAB X IDE with the XC8 compiler for firmware development.
This page consolidates distributor pricing, drop-in alternatives, and applied design guidance that goes beyond what the manufacturer datasheet alone provides.
جایگزین‌های drop-in برای PIC18LF46J50T-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 PIC18LF46J50T-I/ML (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در ADC, Package, Operating Temperature, Timers, I/O Pins.
PIC18F46J50T-I/ML
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF46J50-I/ML
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF45J50T-I/ML
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF46J50T-I/ML حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core | PIC18 8-bit RISC |
| CPU Speed | 48 MHz |
| Program Memory | 64 KB Flash |
| RAM | 4 KB |
| Operating Voltage | 2.0 V to 3.6 V |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| Digital I/O | 36 |
| ADC | 10-bit, 13 channels |
| Timers | 5 (8-bit/16-bit) |
| PWM Modules | 3 CCP + 2 ECCP |
| بسته‌بندی | 44-pin QFN (8x8 mm) with EP |
| نوع نصب | Surface Mount |
| دمای کاری | -40C to +85C |
| وضعیت RoHS | Compliant |
| Power-Saving Modes | nanoWatt XLP (Deep Sleep, Sleep, Idle) |
| Programming | ICSP (In-Circuit Serial Programming) |
پیکربندی پین PIC18LF46J50T-I/ML
| پین 1 | RP5/RD5 — Port D I/O pin / Remappable peripheral |
| پین 2 | RP6/RD6 — Port D I/O pin / Remappable peripheral |
| پین 3 | RP7/RD7 — Port D I/O pin / Remappable peripheral |
| پین 4 | VSS — Ground reference |
| پین 5 | VCAP |
| پین 6 | RA0 — Port A I/O / analog input AN0 |
| پین 7 | RA1 — Port A I/O / analog input AN1 |
| پین 8 | RA2 — Port A I/O / analog input AN2 |
| پین 9 | RA3 — Port A I/O / analog input AN3 |
| پین 10 | RA4 — Port A I/O |
| پین 11 | RA5 — Port A I/O |
| پین 12 | VSS — Ground reference |
| پین 13 | OSC1/CLKI/RA7 — Oscillator input / Port A I/O |
| پین 14 | OSC2/CLKO/RA6 — Oscillator output / Port A I/O |
| پین 15 | VDD — Positive supply voltage (2.0V-3.6V) |
| پین 16 | RB0/AN12 — Port B I/O / analog input |
| پین 17 | RB1/AN10 — Port B I/O / analog input |
| پین 18 | RB2/AN8 — Port B I/O / analog input |
| پین 19 | RB3/AN9 — Port B I/O / analog input |
| پین 20 | RB4/AN11 — Port B I/O / analog input |
| پین 21 | RB5/AN13 — Port B I/O / analog input |
| پین 22 | RB6/PGC — Port B I/O / ICSP clock |
| پین 23 | RB7/PGD — Port B I/O / ICSP data |
| پین 24 | VSS — Ground reference |
| پین 25 | VDD — Positive supply voltage |
| پین 26 | RC0 — Port C I/O |
| پین 27 | RC1 — Port C I/O |
| پین 28 | RC2 — Port C I/O |
| پین 29 | D-/RC4 — USB D- data line / Port C I/O |
| پین 30 | D+/RC5 — USB D+ data line / Port C I/O |
| پین 31 | RC6 — Port C I/O |
| پین 32 | RC7 — Port C I/O |
| پین 33 | VSS — Ground reference |
| پین 34 | VDD — Positive supply voltage |
| پین 35 | RD0 — Port D I/O |
| پین 36 | RD1 — Port D I/O |
| پین 37 | RD2 — Port D I/O |
| پین 38 | RD3 — Port D I/O |
| پین 39 | RD4 — Port D I/O |
| پین 40 | RE0 — Port E I/O / analog input |
| پین 41 | RE1 — Port E I/O / analog input |
| پین 42 | RE2 — Port E I/O / analog input |
| پین 43 | RE3 — Port E I/O |
| پین 44 | VDD — Positive supply voltage |
کاربردهای معمول
PIC18LF46J50T-I/ML مناسب است برای 7 کاربردs: USB HID Devices (Keyboard/Mouse/Gamepad), Battery-Powered IoT Sensor Nodes, Industrial Control Interfaces, Capacitive Touch User Interfaces, Portable Medical Devices, LED Lighting Controllers, USB Data Loggers and Tethered Sensors.
USB HID Devices (Keyboard/Mouse/Gamepad)
The PIC18LF46J50T-I/ML's integrated full-speed USB 2.0 transceiver eliminates external PHY components, reducing BOM cost and PCB area in HID designs. The 48 MHz core handles HID class polling and report generation at the 1 ms USB full-speed frame interval without CPU loading concerns. The 64 KB Flash accommodates HID descriptor tables, report buffers, and application firmware with room for bootloaders. With 36 digital I/O pins, the MCU can scan matrices up to 18x18 for mechanical keyboards or drive multi-axis gaming controllers directly.
پیشنهادی
Battery-Powered IoT Sensor Nodes
The PIC18LF46J50T-I/ML belongs to the nanoWatt XLP family with deep-sleep currents measured in nanoamps, making it ideal for coin-cell or 2xAA battery IoT nodes. The 2.0V to 3.6V supply range supports primary lithium and alkaline chemistries directly. The 13-channel 10-bit ADC reads sensor data efficiently, and the 64 KB Flash stores local buffer plus OTA update images. The integrated USB enables configuration and battery charging from the same port without a separate interface IC.
پیشنهادی
Industrial Control Interfaces
The PIC18LF46J50T-I/ML provides industrial-grade operation from -40C to +85C and 36 I/O pins for connecting to sensors, actuators, and communication buses. The 5 CCP/ECCP modules drive PWM outputs for motor control and LED dimming, while the 10-bit ADC handles analog process variables. The integrated USB simplifies factory programming, firmware updates, and data logging via industrial PCs. The 64 KB Flash allows full Modbus RTU or CANopen protocol stacks with application logic.
پیشنهادی
Capacitive Touch User Interfaces
The PIC18LF46J50T-I/ML integrates a Charge Time Measurement Unit (CTMU) that enables robust capacitive touch sensing without external touch ICs. The CTMU works with the 10-bit ADC to measure capacitance changes on touch pads, supporting sliders, wheels, and matrix buttons. With 36 I/O pins, the MCU can host up to 36 individual touch channels. The 48 MHz core executes Microchip's mTouch library with sub-10 ms response times while maintaining low average current consumption through XLP sleep modes.
پیشنهادی
Portable Medical Devices
The PIC18LF46J50T-I/ML's low power operation and integrated USB support portable medical peripherals such as glucose meters, pulse oximeters, and data loggers. The 2.0V to 3.6V range accommodates Li-ion or NiMH battery packs directly. The 64 KB Flash stores patient data buffers and USB device firmware for connection to host medical software. The nanoWatt XLP technology extends battery life, critical for handheld patient monitoring devices.
پیشنهادی
LED Lighting Controllers
The PIC18LF46J50T-I/ML drives multi-channel LED lighting systems using its 3 CCP and 2 ECCP PWM modules for high-resolution dimming and color mixing. The 48 MHz core supports DMX, DALI, or proprietary LED control protocols. The 64 KB Flash stores lighting scenes and effects, while the integrated USB enables PC-based lighting configuration tools. The exposed pad QFN package provides thermal performance for PWM-driven MOSFETs in adjacent power stages.
پیشنهادی
USB Data Loggers and Tethered Sensors
The PIC18LF46J50T-I/ML serves as the brain of USB-tethered data loggers for environmental, automotive, or industrial monitoring. The integrated USB 2.0 full-speed transceiver streams sensor data to host PCs without external components. The 64 KB Flash buffers large data sets when the host is offline, and 4 KB RAM holds active samples. The 13-channel ADC connects directly to sensors including thermistors, load cells, and bridge transducers.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18LF46J50T-I/ML — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18F46J50T-I/ML | PIC18LF46J50-I/ML | PIC18LF45J50T-I/ML |
|---|---|---|---|---|
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC |
| CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash | 64 KB | 64 KB | 64 KB | 32 KB (-50%) |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB |
| USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| Operating Voltage | 2.0V to 3.6V | 2.0V to 3.6V (wider tolerance) | 2.0V to 3.6V | 2.0V to 3.6V |
| Packaging | Tape & Reel | Tape & Reel | Tube | Tape & Reel |
تفاوت‌های کلیدی
- Integrated full-speed USB 2.0 transceiver (در مقابلPIC18LF45K80T-I/ML)
- nanoWatt XLP deep-sleep mode (در مقابلPIC18F46J50T-I/ML)
- 64 KB Flash with self-programmability (در مقابلPIC18LF45J50T-I/ML)
یادداشت‌های طراحی
Solder the exposed thermal pad (EP) of the 44-pin QFN package directly to a continuous ground plane on the top or bottom PCB layer. The EP carries both the thermal path and the chip substrate ground connection. Multiple thermal vias under the EP - at least 9 vias in a 3x3 array - reduce thermal resistance and improve electrical grounding. Skipping EP soldering causes erratic behavior, USB communication failures, and possible thermal damage at high ambient temperatures.
Place 100 nF ceramic decoupling capacitors within 3 mm of each VDD pin (QFN package has multiple VDD pads: pins 15, 25, 34, 44). Add a single 10 uF bulk capacitor near the package. For USB applications, ensure the VUSB pin has a 220 nF capacitor. Poor decoupling causes USB enumeration failures and ADC noise. The VCAP pin (pin 5) requires a 10 uF capacitor to stabilize the internal 1.8V regulator - do not omit this part.
Do not confuse the LF (low-voltage) variant PIC18LF46J50 with the F (full-voltage) variant PIC18F46J50 - both share the same datasheet but have different operating voltage specifications. For USB applications, the 48 MHz USB clock must be derived from the internal 96 MHz PLL, which requires specific configuration bits. Confusing LF and F variants in 5V-tolerant designs causes unintended behavior when input voltage exceeds the LF rating of 3.6V.
Route the USB D+ (RC5) and D- (RC4) lines as a 90-ohm differential pair with controlled impedance matching. Keep total USB trace length under 50 mm and maintain symmetric lengths within 2 mm. Place the 15 kohm pull-down resistor on D- and the 1.5 kohm pull-up on D+ (for full-speed device mode) close to the MCU. Use Microchip's USB design guidelines document for EMI/ESD compliance.
اطلاعات انطباق
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; this is a commercial/industrial-grade MCU. Refer to Microchip automotive product line for AEC-Q100 alternatives.
