PIC18F44J50-I/PT - 48MHz USB 8-bit MCU 16KB Flash TQFP-44
MPN: PIC18F44J50-I/PT ✓ فعالPIC18F44J50-I/PT نمای کلی
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. The PIC18 family uses an enhanced RISC architecture with 16-bit instructions and 8-bit data paths. USB microcontrollers add a built-in USB transceiver and Serial Interface Engine (SIE), eliminating the need for an external USB interface chip. The PIC18 J-series targets low-power, USB-enabled embedded designs.
Key features include 36 digital I/O pins, 13 10-bit ADC channels, two analog comparators, two USART, SPI, I2C peripherals, and a 64 MHz internal oscillator with PLL. The nanoWatt XLP technology provides deep sleep mode (as low as 100 nA typical) and multiple low-power run/Idle modes for battery-powered applications. The integrated USB 2.0 full-speed transceiver supports device, host, and OTG operation through the on-chip SIE.
The PIC18F44J50-I/PT uses a Harvard architecture with separate program Flash and data SRAM buses, allowing simultaneous instruction fetch and data access. Its 16 KB self-programmable Flash supports ICSP (In-Circuit Serial Programming), enabling field firmware updates. The device operates over the industrial -40C to +85C temperature range and is RoHS compliant, suitable for industrial, consumer, and medical device designs requiring USB connectivity with minimal BOM.
Typical applications include USB-to-UART bridges, HID peripherals (keyboards, mice, game controllers), medical instrumentation with USB data logging, USB-based sensor nodes, and low-power IoT endpoints. The 48 MHz clock rate and integrated USB transceiver simplify USB stack implementation while the small TQFP-44 footprint minimizes PCB area.
When designing with this part, ensure the 3.3V core supply decoupling includes a 100 nF ceramic capacitor near each VDD/VSS pin pair and a bulk 4.7 uF capacitor on the core rail. The USB D+/D- lines require 27-ohm series resistors and a 1.5 kohm pull-up on D+ for full-speed device operation. The integrated USB voltage regulator provides 3.3V from the VBUS pin when powered from USB.
This page synthesizes Microchip datasheet specifications, distributor pricing (LCSC from $1.4633 as of 2026-09-27), same-family drop-in alternatives, and practical PCB design guidance not consolidated on distributor product pages.
جایگزین‌های drop-in برای PIC18F44J50-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 PIC18F44J50-I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Operating Temperature, Timers, Core Architecture, ADC.
PIC18F46J50-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18F44J11-I/ML
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4450-I/P
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4455-I/PT
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F44K22-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18F4480-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F44J50-I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | PIC18 (8-bit RISC, enhanced) |
| Series | PIC18 J-series, nanoWatt XLP |
| Clock Speed (Maximum) | 48 MHz (12 MIPS) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data RAM | 3.8 KB |
| USB Interface | USB 2.0 Full-Speed, integrated transceiver + SIE |
| USB Mode Support | Device / Host / OTG |
| Digital I/O Pins | 36 |
| ADC | 10-bit, 13 channels |
| Analog Comparators | 2 |
| USART | 2 |
| SPI | 1 (MSSP module) |
| I2C | 1 (MSSP module) |
| Timers | 4 (8-bit / 16-bit mix) |
| Supply Voltage (Core) | 2.15 V to 3.6 V |
| Supply Voltage (Analog/IO) | 4.2 V to 5.5 V |
| دمای کاری | -40C to +85C (Industrial) |
| بسته‌بندی | TQFP-44 (PT), 10x10 mm, 0.8 mm pitch |
| نوع نصب | Surface Mount |
| تعداد پایه | 44 |
| وضعیت RoHS | Compliant |
| سطح MSL | 3 (168 hours) |
| Lead-Free | Yes |
| Programming Method | ICSP (In-Circuit Serial Programming) |
| Internal Oscillator | Yes, 8 MHz with PLL to 48 MHz |
| Watchdog Timer | Yes |
پیکربندی پین PIC18F44J50-I/PT
| پین 1 | MCLR — Master Clear (reset) input, active low |
| پین 2 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| پین 3 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| پین 4 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / ADC VREF- |
| پین 5 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC VREF+ |
| پین 6 | RA4/AN4 — Digital I/O / Analog input 4 |
| پین 7 | RA5/AN5 — Digital I/O / Analog input 5 |
| پین 8 | VSS — Ground reference |
| پین 9 | OSC1/CLKIN — Crystal oscillator input / external clock |
| پین 10 | OSC2/CLKOUT — Crystal oscillator output |
| پین 11 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output |
| پین 12 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator in / CCP2 |
| پین 13 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| پین 14 | RC3 — Digital I/O |
| پین 15 | RC4/D-/VM — Digital I/O / USB D- / external USB monitor |
| پین 16 | RC5/D+/VP — Digital I/O / USB D+ / external USB monitor |
| پین 17 | RC6/TX1/CK1 — Digital I/O / USART1 TX / clock |
| پین 18 | RC7/RX1/DT1 — Digital I/O / USART1 RX / data |
| پین 19 | VSS — Ground reference |
| پین 20 | VDD — Positive supply for I/O and analog |
| پین 21 | RB0/AN12 — Digital I/O / Analog input channel 12 |
| پین 22 | RB1/AN10 — Digital I/O / Analog input channel 10 |
| پین 23 | RB2/AN8 — Digital I/O / Analog input channel 8 |
| پین 24 | RB3/AN9 — Digital I/O / Analog input channel 9 |
| پین 25 | RB4/AN11 — Digital I/O / Analog input channel 11 |
| پین 26 | RB5/AN7 — Digital I/O / Analog input channel 7 |
| پین 27 | RB6/PGC — Digital I/O / ICSP clock |
| پین 28 | RB7/PGD — Digital I/O / ICSP data |
| پین 29 | VUSB — Internal USB 3.3V regulator output |
| پین 30 | VDD — Positive supply |
| پین 31 | VSS — Ground reference |
| پین 32 | RD0 — Digital I/O port D |
| پین 33 | RD1 — Digital I/O port D |
| پین 34 | RD2 — Digital I/O port D |
| پین 35 | RD3 — Digital I/O port D |
| پین 36 | RD4 — Digital I/O port D |
| پین 37 | RD5 — Digital I/O port D |
| پین 38 | RD6 — Digital I/O port D |
| پین 39 | RD7 — Digital I/O port D |
| پین 40 | VSS — Ground reference |
| پین 41 | VDD — Positive supply |
| پین 42 | RE0 — Digital I/O port E |
| پین 43 | RE1 — Digital I/O port E |
| پین 44 | RE2 — Digital I/O port E |
کاربردهای معمول
PIC18F44J50-I/PT مناسب است برای 6 کاربردs: USB HID Peripheral (Keyboard/Mouse/Gamepad), USB-to-UART Bridge Adapter, Medical USB Data Logger, USB Sensor Node (Industrial IoT), USB Barcode / RFID Reader, USB Audio Class Device (Speaker/Microphone).
USB HID Peripheral (Keyboard/Mouse/Gamepad)
The PIC18F44J50-I/PT is well suited to USB HID peripherals because its integrated full-speed USB transceiver and SIE implement the HID class without an external interface chip. The 48 MHz clock supports the 1 ms HID polling interval with ample margin for button debouncing and LED control. Pair the MCU with low-side MOSFETs for keyboard matrix scanning; the 36 I/O pins handle 6x6 matrices with room for caps-lock and backlight PWM channels. Battery-powered designs benefit from the nanoWatt XLP deep-sleep mode (under 100 nA typical) for cordless mice that spend most of their life idle.
پیشنهادی
USB-to-UART Bridge Adapter
For USB-to-UART bridge adapters the PIC18F44J50-I/PT integrates both USB device functionality and two USART modules, eliminating the need for a separate bridge IC like FTDI FT232R. The integrated USB voltage regulator provides 3.3 V from VBUS, so only an external 12 MHz crystal and decoupling caps are required. With 3.8 KB RAM, it can buffer UART traffic for either baud rate while maintaining USB 2.0 full-speed throughput (12 Mbps). The industrial -40C to +85C grade supports industrial serial-port replacement designs.
پیشنهادی
Medical USB Data Logger
The PIC18F44J50-I/PT fits portable medical data loggers that stream samples to a PC over USB. Its 13-channel 10-bit ADC captures temperature, battery voltage, and sensor signals with 4 mV LSB at 3.3 V reference. The 16 KB Flash holds lightweight USB class drivers and basic DSP routines, while 3.8 KB RAM buffers sample packets between USB transfers. The 2.15 V minimum core supply enables operation from a single Li-Ion cell without a boost converter, reducing BOM cost and PCB area in patient wearables.
پیشنهادی
USB Sensor Node (Industrial IoT)
USB-powered industrial sensor nodes leverage the PIC18F44J50-I/PT to read multiple analog sensors and present them to a host over USB. The on-chip 10-bit ADC handles 13 sensor channels while the integrated USB negotiates with the host for bus power. The nanoWatt XLP idle mode drops consumption below 1 uA during USB suspend, satisfying USB 2.0 suspend current requirements without external load switches. The TQFP-44 footprint keeps the PCB small enough to embed inside a sensor housing.
پیشنهادی
USB Barcode / RFID Reader
USB barcode scanners and RFID readers use the PIC18F44J50-I/PT to capture scan data and present it via USB HID or CDC class. The 48 MHz clock reads sensor output and decodes barcode patterns in real time, while the integrated USB transceiver streams decoded data to the host as keyboard input. The 36 I/O pins drive LCD status displays, LED indicators, and the trigger button. The -40C to +85C industrial temperature range supports warehouse and outdoor scanning environments.
پیشنهادی
USB Audio Class Device (Speaker/Microphone)
The PIC18F44J50-I/PT can implement USB audio class 1.0 devices (speakers, microphones, headsets) using the integrated USB 2.0 full-speed link. The 48 MHz instruction rate handles USB isochronous transfers at the 1 ms polling interval while PWM outputs drive a class-D amplifier stage. The 16 KB Flash holds the USB audio class driver and a small audio buffer; for higher sample rates the PIC18F46J50-I/PT sibling provides more headroom. The compact TQFP-44 package fits inside wearable audio accessory enclosures.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18F44J50-I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18F46J50-I/PT | PIC18F44J11-I/ML | PIC18F4450-I/P | PIC18F4455-I/PT | PIC18F44K22-I/PT | PIC18F4480-I/PT |
|---|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (ML) - same | TQFP-44 (P) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 64 KB (+300%) | 16 KB (same) | 16 KB (same) | 24 KB (+50%) | 16 KB (same) | 16 KB (same) |
| RAM | 3.8 KB | 3.8 KB (same) | 3.8 KB (same) | 2 KB (-47%) | 2 KB (-47%) | 1.5 KB (-60%) | 768 B (-80%) |
| Integrated USB | Yes (Full-Speed, OTG) | Yes (Full-Speed, OTG) | No | Yes (Full-Speed) | Yes (Full-Speed) | No | No (CAN instead) |
| Clock Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 64 MHz | 40 MHz |
| Operating Voltage | 2.15 V to 3.6 V | 2.15 V to 3.6 V | 2.15 V to 3.6 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 1.8 V to 3.6 V | 4.2 V to 5.5 V |
| nanoWatt XLP | Yes | Yes | Yes | No | No | Yes | No |
| Approx. Unit Price | $1.46 (LCSC) | $2.10 | $1.30 | $2.40 | $2.50 | $1.50 | $2.30 |
تفاوت‌های کلیدی
- Larger Flash without changing footprint (در مقابلPIC18F44K22-I/PT)
- Lower voltage operation with same USB feature set (در مقابلPIC18F4450-I/P)
- Drop-in upgrade path for larger firmware (در مقابلPIC18F46J50-I/PT)
یادداشت‌های طراحی
Place a 100 nF ceramic decoupling capacitor on every VDD/VSS pin pair (4 pairs on TQFP-44) and a single 4.7 uF bulk capacitor on the main VDD rail within 10 mm of the MCU. The PIC18F44J50 has both an internal USB voltage regulator (VUSB pin) and the core supply; tie VUSB to VDD via 220 nF when USB is unused, or to the USB VBUS-derived 3.3 V when USB is used. The deep-sleep current of nanoWatt XLP is achieved only when the on-chip regulator is disabled and the ADC is powered down.
Route USB D+ and D- as a matched 90-ohm differential pair from pins 15-16 to the USB connector, with maximum trace length of 25 mm. Place the 15 kohm pull-up resistor on D+ as close to the MCU pin as possible to ensure proper full-speed signaling. Add a 0.1 uF bypass cap on the VBUS pin if the device draws bus power. The internal USB regulator (VUSB pin 29) needs a 220 nF to 470 nF ceramic capacitor for stability.
Do not exceed the 3.6 V absolute maximum on the digital VDD supply or the USB D+/D- pins will forward-conduct into the internal ESD diodes and load the USB bus. The analog VDD rail (VDD on pins 20, 30, 41) tolerates 4.2-5.5 V; never tie both analog and digital VDDs to 5 V simultaneously. Watch for the MCLR pin (pin 1) - if left floating, the device may reset intermittently; tie to VDD via a 10 kohm resistor. ICSP programming requires the PGC/PGD pins (RB6/RB7) to not be pulled low during reset.
TQFP-44 has 0.8 mm pitch leads; use a PCB footprint with 0.4 mm pad width and 1.5 mm pad length to ensure reliable solder joints. Place the MCU near the edge of the board if USB is used, with the USB connector within 25 mm of the D+/D- pins. Ground plane on the top layer under the MCU improves thermal dissipation but keep the area under the crystal pins (9-10) clear of ground plane pour to reduce capacitive loading that shifts the oscillation frequency.
اطلاعات انطباق
RoHS compliant per Microchip product page. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified; not designed for automotive use. For automotive-grade PIC18F44J50, check Microchip's automotive part number suffix -I/PTAEC1 or similar.
