PIC18LF45J50-I/PT - 8-bit USB MCU, 32KB Flash, 44-TQFP | Microchip
MPN: PIC18LF45J50-I/PT ✓ فعالPIC18LF45J50-I/PT جائزہ
An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, RAM, non-volatile program memory, and peripheral interfaces on a single die. PIC microcontrollers use a Harvard RISC architecture with separate program and data buses, which allows the CPU to fetch an instruction and a data operand in the same cycle. The PIC18 family extends the baseline PIC16 instruction set with C-friendly addressing, a hardware multiplier, and 16-bit instruction words, positioning PIC18LF45J50-I/PT inside the broader hierarchy of 8-bit MCU -> PIC microcontroller -> Microchip MCU portfolio -> embedded computing platform.
Key features include 32 KB self-programmable Flash, 3.8 KB RAM, full-speed USB 2.0 with on-chip transceiver, 13-channel 10-bit ADC, two analog comparators, two UART/SPI/I2C modules, and nanoWatt XLP deep-sleep modes. The device supports 34 digital I/O pins, 2 CCP modules, and an Enhanced Capture/Compare/PWM peripheral for motor and lighting control. Real-Time Clock/Calendar with software-calibrated 32 kHz source is also integrated.
Architecturally, the PIC18LF45J50-I/PT pairs the standard PIC18 pipeline with a wide operating voltage range, an internal 31 kHz to 8 MHz oscillator block, and a 4x PLL to reach 48 MHz. The on-chip USB SIE handles full-speed and low-speed signaling without an external PHY, while nanoWatt XLP technology gates unused peripherals to achieve the 13 nA sleep figure, which is critical for battery-powered USB peripherals.
Typical applications include USB HID peripherals (keyboards, mice, joysticks), battery-powered sensors, industrial data loggers, USB-to-UART bridges, and low-power embedded control nodes. The wide temperature range (-40C to +85C industrial grade) also suits factory automation modules and consumer-electronics accessories.
When designing with this part, place the 12 MHz external crystal or use the internal 8 MHz HFINTOSC with 4x PLL close to the OSC pins, keep D+/D- trace lengths matched within 50 mil, and follow Microchip's "PIC18F46J50 Family Data Sheet" guidelines for USB-IF compliance testing.
This page synthesizes distributor pricing, same-family drop-in alternatives, USB design notes, and a 44-pin TQFP pinout diagram that are not co-located on any single manufacturer or distributor page.
کے لیے ڈراپ اِن متبادل PIC18LF45J50-I/PT — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC18LF45J50-I/PT (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, ADC, Core, Timers, USB.
PIC18LF45J50T-I/PT
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC18F45J50-I/PT
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC18LF46J50-I/PT
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC18LF44J50-I/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F45J50T-I/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18LF46J50T-I/PT
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC18LF45J50-I/PT زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core | PIC18 (8-bit Harvard RISC) |
| Family | PIC18 J-series XLP nanoWatt |
| Program Memory | 32 KB Flash |
| Data RAM | 3.8 KB |
| Max CPU Speed | 48 MHz (12 MIPS) |
| سپلائی وولٹیج | 2.0 V to 3.6 V |
| Deep-Sleep Current | 13 nA typical (nanoWatt XLP) |
| USB | USB 2.0 Full-Speed / Low-Speed, on-chip transceiver |
| Digital I/O Pins | 34 |
| ADC | 13-channel, 10-bit |
| Comparators | 2 analog comparators |
| Timers | Timer0/1/2/3 + 2 CCP + ECCP |
| Communication | 2x EUSART, 2x MSSP (SPI/I2C) |
| پیکیج | 44-pin TQFP (PT) 10x10 mm |
| آپریٹنگ درجہ حرارت | -40C to +85C (Industrial) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| MSL لیول | 3 (168 hours) |
| RoHS اسٹیٹس | Compliant |
PIC18LF45J50-I/PT پن کنفیگریشن
| پن 1 | /MCLR/RE3 — Master Clear (reset) input, or digital input RE3 |
| پن 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| پن 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| پن 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| پن 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| پن 6 | RA4/AN4/T0CKI — PORTA bit 4 / analog input 4 / Timer0 clock |
| پن 7 | RA5/AN5/SS1 — PORTA bit 5 / analog input 5 / SPI1 slave-select |
| پن 8 | RE0/RD — PORTE bit 0 / Parallel Slave Port read control |
| پن 9 | RE1/WR — PORTE bit 1 / Parallel Slave Port write control |
| پن 10 | RE2/CS — PORTE bit 2 / Parallel Slave Port chip-select |
| پن 11 | VDD — Positive supply voltage |
| پن 12 | VSS — Ground |
| پن 13 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock input |
| پن 14 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output |
| پن 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock |
| پن 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| پن 17 | RC2/CCP1 — PORTC bit 2 / Enhanced CCP1 PWM output |
| پن 18 | RC3/SCK1/SCL1 — PORTC bit 3 / SPI1 clock / I2C1 clock |
| پن 19 | RC4/D-/VM — PORTC bit 4 / USB D- / external USB monitor input |
| پن 20 | RC5/D+/VP — PORTC bit 5 / USB D+ / external USB monitor input |
| پن 21 | RC6/TX1/CK1 — PORTC bit 6 / EUSART1 TX / EUSART1 clock |
| پن 22 | RC7/RX1/DT1 — PORTC bit 7 / EUSART1 RX / EUSART1 data |
| پن 23 | RB0/AN12 — PORTB bit 0 / analog input 12 / interrupt-on-change |
| پن 24 | RB1/AN10 — PORTB bit 1 / analog input 10 / interrupt-on-change |
| پن 25 | RB2/AN8 — PORTB bit 2 / analog input 8 / interrupt-on-change |
| پن 26 | RB3/AN9 — PORTB bit 3 / analog input 9 / interrupt-on-change |
| پن 27 | RB4/AN11 — PORTB bit 4 / analog input 11 / interrupt-on-change |
| پن 28 | RB5/AN13 — PORTB bit 5 / analog input 13 / interrupt-on-change |
| پن 29 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پن 30 | RB7/PGD — PORTB bit 7 / ICSP data |
| پن 31 | VUSB — USB internal transceiver supply (3.3 V regulated output) |
| پن 32 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port data bit 0 |
| پن 33 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port data bit 1 |
| پن 34 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port data bit 2 |
| پن 35 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port data bit 3 |
| پن 36 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port data bit 4 |
| پن 37 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port data bit 5 |
| پن 38 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port data bit 6 |
| پن 39 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port data bit 7 |
| پن 40 | VSS — Ground |
| پن 41 | VDD — Positive supply voltage |
| پن 42 | ENVREG — Internal voltage regulator enable (tie to VDD for 3.3 V USB) |
| پن 43 | VCAP — Internal regulator output filter capacitor |
| پن 44 | RF7/SS2 — PORTF bit 7 / SPI2 slave-select |
عام استعمالات
PIC18LF45J50-I/PT کے لیے موزوں ہے 6 ایپلیکیشنs: USB HID Peripherals (Keyboard, Mouse, Joystick), USB-to-UART Bridge Module, Battery-Powered Sensor Data Logger, Industrial USB Sensor Hub, USB-Connected Audio Control Surface, Low-Cost USB Bootloader Host Probe.
USB HID Peripherals (Keyboard, Mouse, Joystick)
The PIC18LF45J50-I/PT is a near-ideal core for USB Human Interface Devices thanks to its on-chip USB 2.0 full-speed transceiver and 12 MIPS CPU. A typical HID keyboard uses 12 KB to 18 KB of Flash for the HID report descriptors plus class driver, well within the 32 KB available; the 48 MHz clock yields the 1 ms USB polling interval with comfortable timing margin. The 13 nA deep-sleep current allows battery-powered wireless keyboard dongles to last multiple years on a coin cell. Pair the MCU with an external 2.4 GHz radio (e.g., nRF24L01) and an EEPROM HID descriptor store for a complete HID solution.
تجویز کردہ
USB-to-UART Bridge Module
The PIC18LF45J50-I/PT's integrated USB transceiver and dual EUSART make it an excellent CDC-class USB-to-UART bridge, replacing FTDI FT232R solutions at lower BOM cost. Operating at 48 MHz, the device achieves 921600 bps UART throughput with no flow-control overrun thanks to the on-chip 16-byte hardware FIFO. The wide 2.0 V to 3.6 V supply matches industrial 3.3 V logic rails without level shifters. Use Microchip's CDC bootloader to allow field firmware upgrades over USB without an external programmer.
تجویز کردہ
Battery-Powered Sensor Data Logger
The PIC18LF45J50-I/PT's nanoWatt XLP technology with 13 nA deep-sleep current enables multi-year battery operation in remote sensor data loggers. The 13-channel 10-bit ADC directly digitizes analog sensors without an external ADC, while 3.8 KB RAM buffers samples between USB service intervals. The on-chip RTCC with software-calibrated 32 kHz source timestamps each measurement. Typical use case: deploy a logger reading temperature, humidity, and battery voltage, then service once per year by retrieving over USB.
تجویز کردہ
Industrial USB Sensor Hub
In factory automation, the PIC18LF45J50-I/PT aggregates multiple serial sensors and exposes them to a host PC over USB. Two EUSARTs plus two MSSP (SPI/I2C) channels allow connection of up to four sensor buses simultaneously, while the 48 MHz CPU sustains USB full-speed traffic and sensor polling concurrently. The -40 C to +85 C industrial temperature range satisfies factory-floor environments. The 44-pin TQFP package supports standard IPC-9701 SMT reflow profiles.
تجویز کردہ
USB-Connected Audio Control Surface
Hobbyist and prosumer audio mixers can use the PIC18LF45J50-I/PT as a USB-HID knob-and-slider controller, sending MIDI Control Change or HID Volume messages. The PWM + ECCP module drives LED VU meters and indicator brightness; the 13-channel ADC reads potentiometer and fader positions. 32 KB Flash holds USB-MIDI stack plus custom HID descriptor logic. Compared with the PIC16F1455, this part provides more headroom for software-driven user interfaces.
تجویز کردہ
Low-Cost USB Bootloader Host Probe
Field engineers use the PIC18LF45J50-I/PT as a USB-host-capable firmware-update dongle for legacy PIC targets. By implementing Microchip's AN1310 HID bootloader, the MCU streams new HEX files to target MCUs over USB and triggers a reset for self-programming. The 34 digital I/O pins drive status LEDs and target RESET/DTR lines. Wide 2.0 V to 3.6 V supply allows the dongle to be powered from any USB-A port without external regulation concerns.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC18LF45J50-I/PT — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC18LF45J50T-I/PT | PIC18F45J50-I/PT | PIC18LF46J50-I/PT | PIC18LF44J50-I/PT | PIC18F45J50T-I/PT | PIC18LF46J50T-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Core | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC |
| Flash Memory | 32 KB | 32 KB | 32 KB | 64 KB | 16 KB | 32 KB | 64 KB |
| Data RAM | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB |
| Max CPU Speed | 48 MHz (12 MIPS) | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| USB | USB 2.0 Full/Low-Speed | USB 2.0 Full/Low-Speed | USB 2.0 Full/Low-Speed | USB 2.0 Full/Low-Speed | USB 2.0 Full/Low-Speed | USB 2.0 Full/Low-Speed | USB 2.0 Full/Low-Speed |
| Supply 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 | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| Deep-Sleep Current | 13 nA | 13 nA | 13 nA | 13 nA | 13 nA | 13 nA | 13 nA |
| Digital I/O | 34 | 34 | 34 | 34 | 34 | 34 | 34 |
اہم امتیازی خصوصیات
- On-chip USB 2.0 full-speed transceiver eliminates external PHY cost (بمقابلہPIC16F877A-I/P)
- nanoWatt XLP deep-sleep current of 13 nA extends coin-cell battery life by years (بمقابلہPIC18F2550-I/SP)
- Drop-in upgrade path to 64 KB Flash without PCB redesign (بمقابلہPIC18LF45J10-I/PT)
ڈیزائن نوٹس
USB-IF compliance requires matched 90 ohm differential impedance on the D+/D- pair and a 15 kohm pull-down resistor on each line, per USB 2.0 specification section 6.2. According to Microchip's PIC18F46J50 family datasheet, the trace length mismatch between D+ and D- must stay below 4 mm. Place the VUSB 0.1 uF bypass capacitor within 3 mm of pin 31 and the VCAP 10 uF capacitor within 5 mm of pin 43 to ensure regulator stability. A common-mode choke (e.g., ACM2012) is recommended near the USB connector for EMI compliance.
Estimated: at 48 MHz CPU + active USB + 5 mA peripheral load, the PIC18LF45J50-I/PT draws approximately 25 mA typical. To maximize battery life, set the CPU to IDLE via the SLEEP instruction between USB SOF interrupts and use the RTCC + WDT wake source to achieve the 13 nA deep-sleep figure. Decouple VDD pins 11 and 41 individually with 100 nF ceramic capacitors and a bulk 10 uF aluminum-polymer capacitor to handle USB inrush current at hot-plug events.
Do not leave the ENVREG pin (pin 42) floating; tie it to VDD to enable the internal 3.3 V regulator that supplies the USB transceiver. Forgetting this is the most common reason for USB enumeration failure on first prototypes. Also, the ICSP pins RB6/PGD (pin 29) and RB7/PGC (pin 30) must not be pulled low at power-up to avoid entering programming mode unintentionally. Use 4.7 kohm pull-ups to VDD on these pins, and add a series 100 ohm resistor on each to the ICSP header for in-circuit programming protection.
تعمیل کی معلومات
RoHS compliant and lead-free per Microchip product page and DigiKey compliance data. Not AEC-Q100 qualified - for automotive USB applications, choose PIC18F46J50 or other AEC-Q100-qualified Microchip variants.