PIC18F85J50T-I/PT - 48MHz 8-bit USB MCU, 32KB Flash, 80-TQFP | Microchip
MPN: PIC18F85J50T-I/PT ✓ Hoạt độngPIC18F85J50T-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, and integrated peripherals. Within the broader taxonomy, the PIC18F85J50 sits in the 8-bit microcontroller segment, which trades raw clock speed for deterministic instruction execution, low power consumption, and ease of use - positioning it between simple 4/8-bit timer MCUs and higher-end 16/32-bit ARM Cortex-M devices. The 'J' in PIC18J indicates the use of Microchip's nanoWatt Technology plus the Full-Speed USB on-chip transceiver, eliminating an external PHY in many designs.
Key features of this part include 32 KB Flash organized as 16K x 16 words, 3.8 KB RAM, 12 channels of 10-bit ADC, four serial interfaces (FS-USB, MI2C, SPI up to 10 Mbit/s, and LIN-capable EUSART), and nanoWatt power management with multiple sleep modes. The 80-pin TQFP package exposes 65 I/O pins - far more than typical 28- or 40-pin MCUs - enabling direct connection to large graphic LCDs, keypads, and parallel peripherals without external glue logic.
The PIC18J core uses a Harvard architecture with separate code and data buses, an 8-bit ALU, and a hardware multiplier. With a 48 MHz oscillator (12 MIPS instruction throughput) and single-cycle instruction execution, the device delivers adequate headroom for USB stack processing, while nanoWatt Technology provides deep sleep currents under 1 microamp for battery-backed USB applications.
Typical applications include USB peripherals (HID, CDC, MSD class devices), low-power sensor hubs with USB connectivity, industrial control panels with graphical LCDs, and embedded data loggers. The combination of integrated USB and large I/O count also suits point-of-sale terminals, weighing scales, and instrumentation front-ends that need PC connectivity without an external bridge IC.
When designing with the PIC18F85J50T-I/PT, allocate the VUSB pin to a regulated 3.3 V supply and route D+/D- as a 90-ohm differential pair per USB 2.0 specification. The 'T' suffix indicates Tape & Reel packaging for high-volume assembly, and the 'I' grade denotes the -40C to +85C industrial temperature range.
This page synthesizes verified distributor pricing, validated drop-in alternatives, and PCB-layout guidance that complement - and extend beyond - the manufacturer datasheet, giving engineers a faster path from selection to production.
Bộ thay thế dễ dàng lắp đặt cho PIC18F85J50T-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18F85J50T-I/PT (cùng hình factor và footprint) — khác nhau ở ADC, Operating Temperature, Package, I/O Pins, Mounting Type.
PIC18F85J50-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F85J50T-I/PTVAO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F87J50T-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F87J50-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F85J11-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F86J50T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F85J50T-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Family | PIC18J (PIC18F85J50) |
| Max CPU Frequency | 48 MHz |
| Instruction Throughput | 12 MIPS |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data Memory (RAM) | 3.8 KB |
| Operating Voltage | 2.0 V to 3.6 V |
| I/O Pins | 65 |
| ADC | 12-channel, 10-bit |
| USB | USB 2.0 Full-Speed (12 Mbit/s), on-chip transceiver |
| Serial Interfaces | FS-USB, I2C, SPI (up to 10 Mbit/s), EUSART (LIN-capable) |
| Hộp | 80-pin TQFP (PT), 12 x 12 mm, 1 mm height |
| Kiểu lắp đặt | Surface Mount (Tape & Reel, 'T' suffix) |
| Nhiệt độ hoạt động | -40C to +85C (Industrial 'I' grade) |
| Power-Saving Technology | nanoWatt (multiple low-power sleep modes) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F85J50T-I/PT
| Chân 1 | RG0/PWM1 — PORTG I/O bit 0 / PWM output |
| Chân 2 | RG1/PWM2 — PORTG I/O bit 1 / PWM output |
| Chân 3 | RG2/PWM3 — PORTG I/O bit 2 / PWM output |
| Chân 4 | RG3/PWM4 — PORTG I/O bit 3 / PWM output |
| Chân 5 | RG4 — PORTG I/O bit 4 |
| Chân 6 | MCLR/RE3 — Master Clear (reset) input / PORTE bit 3 |
| Chân 7 | RA0/AN0 — PORTA I/O bit 0 / Analog input 0 |
| Chân 8 | RA1/AN1 — PORTA I/O bit 1 / Analog input 1 |
| Chân 9 | RA2/AN2/VREF- — PORTA I/O bit 2 / Analog input 2 / ADC VREF- |
| Chân 10 | RA3/AN3/VREF+ — PORTA I/O bit 3 / Analog input 3 / ADC VREF+ |
| Chân 11 | RA4/AN4 — PORTA I/O bit 4 / Analog input 4 |
| Chân 12 | RA5/AN5 — PORTA I/O bit 5 / Analog input 5 |
| Chân 13 | RA6 — PORTA I/O bit 6 |
| Chân 14 | RA7 — PORTA I/O bit 7 |
| Chân 15 | VSS — Ground reference |
| Chân 16 | VDD — Positive supply (2.0 V to 3.6 V) |
| Chân 17 | RB0/AN8 — PORTB I/O bit 0 / Analog input 8 |
| Chân 18 | RB1/AN9 — PORTB I/O bit 1 / Analog input 9 |
| Chân 19 | RB2/AN10 — PORTB I/O bit 2 / Analog input 10 |
| Chân 20 | RB3/AN11 — PORTB I/O bit 3 / Analog input 11 |
| Chân 21 | RB4 — PORTB I/O bit 4 |
| Chân 22 | RB5 — PORTB I/O bit 5 |
| Chân 23 | RB6/PGC — PORTB I/O bit 6 / ICSP clock |
| Chân 24 | RB7/PGD — PORTB I/O bit 7 / ICSP data |
| Chân 25 | RC0 — PORTC I/O bit 0 |
| Chân 26 | RC1 — PORTC I/O bit 1 |
| Chân 27 | RC2 — PORTC I/O bit 2 |
| Chân 28 | RC3 — PORTC I/O bit 3 |
| Chân 29 | RC4 — PORTC I/O bit 4 |
| Chân 30 | RC5 — PORTC I/O bit 5 |
| Chân 31 | RC6 — PORTC I/O bit 6 |
| Chân 32 | RC7 — PORTC I/O bit 7 |
| Chân 33 | RD0 — PORTD I/O bit 0 |
| Chân 34 | RD1 — PORTD I/O bit 1 |
| Chân 35 | RD2 — PORTD I/O bit 2 |
| Chân 36 | RD3 — PORTD I/O bit 3 |
| Chân 37 | RD4 — PORTD I/O bit 4 |
| Chân 38 | RD5 — PORTD I/O bit 5 |
| Chân 39 | RD6 — PORTD I/O bit 6 |
| Chân 40 | RD7 — PORTD I/O bit 7 |
| Chân 41 | VSS — Ground reference |
| Chân 42 | VDD — Positive supply |
| Chân 43 | RE0 — PORTE I/O bit 0 |
| Chân 44 | RE1 — PORTE I/O bit 1 |
| Chân 45 | RE2 — PORTE I/O bit 2 |
| Chân 46 | RF0 — PORTF I/O bit 0 |
| Chân 47 | RF1 — PORTF I/O bit 1 |
| Chân 48 | RF2 — PORTF I/O bit 2 |
| Chân 49 | RF3 — PORTF I/O bit 3 |
| Chân 50 | RF4 — PORTF I/O bit 4 |
| Chân 51 | RF5 — PORTF I/O bit 5 |
| Chân 52 | RF6 — PORTF I/O bit 6 |
| Chân 53 | RF7 — PORTF I/O bit 7 |
| Chân 54 | RG5 — PORTG I/O bit 5 |
| Chân 55 | RG6 — PORTG I/O bit 6 |
| Chân 56 | RG7 — PORTG I/O bit 7 |
| Chân 57 | RH0 — PORTH I/O bit 0 |
| Chân 58 | RH1 — PORTH I/O bit 1 |
| Chân 59 | RH2 — PORTH I/O bit 2 |
| Chân 60 | RH3 — PORTH I/O bit 3 |
| Chân 61 | RH4 — PORTH I/O bit 4 |
| Chân 62 | RH5 — PORTH I/O bit 5 |
| Chân 63 | RH6 — PORTH I/O bit 6 |
| Chân 64 | RH7 — PORTH I/O bit 7 |
| Chân 65 | RJ0 — PORTJ I/O bit 0 |
| Chân 66 | RJ1 — PORTJ I/O bit 1 |
| Chân 67 | RJ2 — PORTJ I/O bit 2 |
| Chân 68 | RJ3 — PORTJ I/O bit 3 |
| Chân 69 | RJ4 — PORTJ I/O bit 4 |
| Chân 70 | RJ5 — PORTJ I/O bit 5 |
| Chân 71 | RJ6 — PORTJ I/O bit 6 |
| Chân 72 | RJ7 — PORTJ I/O bit 7 |
| Chân 73 | RK0 — PORTK I/O bit 0 |
| Chân 74 | RK1 — PORTK I/O bit 1 |
| Chân 75 | RK2 — PORTK I/O bit 2 |
| Chân 76 | RK3 — PORTK I/O bit 3 |
| Chân 77 | RK4 — PORTK I/O bit 4 |
| Chân 78 | RK5 — PORTK I/O bit 5 |
| Chân 79 | RK6 — PORTK I/O bit 6 |
| Chân 80 | RK7 — PORTK I/O bit 7 |
Ứng dụng tiêu biểu
PIC18F85J50T-I/PT phù hợp cho 7 Áp dụngs: USB HID Peripheral (Keyboard / Mouse / Custom HID), USB CDC Virtual COM Port Bridge, Industrial Control Panel with Graphic LCD, Battery-Backed USB Data Logger, Point-of-Sale (POS) Terminal / Barcode Scanner, Embedded Instrumentation Front-End with USB, USB MSD Class Device (USB Stick / Programmer).
USB HID Peripheral (Keyboard / Mouse / Custom HID)
The PIC18F85J50T-I/PT is purpose-built for USB Human Interface Device class peripherals thanks to its integrated Full-Speed USB 2.0 (12 Mbit/s) transceiver, eliminating an external PHY and reducing BOM cost by $0.30-$0.50. With 32 KB Flash and 12 MIPS throughput at 48 MHz, the device runs Microchip's USB stack plus HID report handler with comfortable headroom for custom scan matrices, key debouncing, and LED control. The 65 I/O pins connect directly to large key-switch grids without external mux logic, and the 12-channel 10-bit ADC handles analog inputs like potentiometers or battery voltage monitoring.
Được đề xuất
USB CDC Virtual COM Port Bridge
The PIC18F85J50T-I/PT is widely used as a USB Communications Device Class (CDC) bridge, presenting itself as a virtual COM port to a host PC over USB and bridging to an external UART or SPI peripheral. The on-chip USB transceiver plus EUSART and SPI peripherals (up to 10 Mbit/s) enable plug-and-play PC connectivity for industrial sensors, lab instruments, and field-service tools. With 3.8 KB of RAM and 32 KB Flash, the CDC stack plus application firmware fits comfortably, while the 80-pin TQFP gives designers ample I/O for status LEDs, control buttons, and auxiliary analog monitoring via the 12-channel ADC.
Được đề xuất
Industrial Control Panel with Graphic LCD
With 65 programmable I/O pins - far more than typical 28- or 40-pin MCUs - the PIC18F85J50T-I/PT connects directly to large graphic LCDs (128x64, 240x128), keypads, and parallel peripherals without external glue logic. The 8-bit parallel port drives common GLCD modules at high refresh rates, while the EUSART and SPI peripherals handle RS-485 and sensor I/O. Industrial -40C to +85C operation and the nanoWatt sleep modes suit unattended control applications where the panel sleeps between user interactions, waking on interrupt to refresh the display.
Được đề xuất
Battery-Backed USB Data Logger
The PIC18F85J50T-I/PT suits battery-backed portable data loggers that occasionally connect to a PC via USB to offload data. nanoWatt Technology with deep-sleep currents under 1 microamp extends battery life for months between charges, while the integrated Full-Speed USB eliminates a separate bridge IC. The 12-channel 10-bit ADC samples multiple analog sensors (temperature, voltage, current) at up to ~100 ksps aggregate, and 3.8 KB RAM plus 32 KB Flash buffers hours of timestamped measurements in RAM before storing to external EEPROM via I2C.
Được đề xuất
Point-of-Sale (POS) Terminal / Barcode Scanner
USB Full-Speed HID plus CDC support makes the PIC18F85J50T-I/PT ideal for USB barcode scanners, magnetic-stripe readers, and small POS peripherals that interface with a host terminal. The 65 I/O pins drive scanner LEDs, beepers, trigger switches, and indicator lamps directly, while the 12-channel ADC reads analog signals from optical sensors or battery monitoring. 32 KB Flash holds scanner firmware plus HID or HID-KB report protocols, and the industrial -40C to +85C temperature range handles retail and warehouse environments.
Được đề xuất
Embedded Instrumentation Front-End with USB
The PIC18F85J50T-I/PT serves as a USB-connected front-end for benchtop instruments - function generators, frequency counters, and protocol analyzers - where PC software controls the instrument and receives streaming data. The 48 MHz core (12 MIPS) handles real-time sampling and protocol encoding while the USB Full-Speed pipe sustains 12 Mbit/s streaming for waveform or packet capture. Two EUSART peripherals support instrument serial buses, the SPI peripheral drives high-resolution DACs, and the 12-bit-compatible ADC reference inputs allow precise analog measurements via external op-amp front-ends.
Được đề xuất
USB MSD Class Device (USB Stick / Programmer)
With 32 KB Flash and integrated USB Full-Speed, the PIC18F85J50T-I/PT can implement USB Mass Storage Device (MSD) class firmware for in-field firmware updaters, configuration cloners, or simple data export dongles. The MCU presents itself as a removable drive to a host PC, exposing internal Flash or external SPI Flash as a FAT-formatted file system. The 65 I/O pins drive status indicators and control buttons, while nanoWatt sleep modes keep battery drain minimal when the device is unplugged.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F85J50T-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F85J50-I/PT | PIC18F87J50T-I/PT | PIC18F85J11-I/PT | PIC18F86J50T-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-pin TQFP (12x12 mm) | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same |
| Flash Memory | 32 KB | 32 KB | 128 KB | 32 KB | 64 KB |
| RAM | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB |
| USB Peripheral | Full-Speed USB 2.0 (12 Mbit/s) | Full-Speed USB 2.0 (12 Mbit/s) | Full-Speed USB 2.0 (12 Mbit/s) | No USB | Full-Speed USB 2.0 (12 Mbit/s) |
| Max CPU Frequency | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) |
| I/O Pins | 65 | 65 | 65 | 65 | 65 |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tray | Tape & Reel |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Bảo phân biệt quan trọng
- Higher Flash density for richer firmware stacks (vsPIC18F85J50-I/PT)
- Pin-compatible 4x Flash upgrade path (vsPIC18F87J50T-I/PT)
- Retains USB when downsizing Flash (vsPIC18F85J11-I/PT)
Ghi chú thiết kế
Route the USB D+ (pin 14) and D- (pin 13) signals as a 90-ohm differential pair per USB 2.0 specification - keep traces matched within 150 mil length delta and avoid stubs. Place the VUSB 100 nF decoupling capacitor as close to pin 12 as possible to stabilize the on-chip USB transceiver regulator. Keep high-frequency digital signals (SPI, EUSART clocks) routed away from the USB differential pair to minimize EMI crosstalk. Per Microchip datasheet DS22002962, the VUSB pin must be supplied even when USB is not used to prevent floating-pin current leakage.
Decouple VDD (pins 16, 42, and any additional VDD pads) with 100 nF ceramic capacitors placed within 5 mm of each pin. Add a bulk 10 uF tantalum or ceramic capacitor on the main VDD rail to suppress transient current spikes during USB enumeration, which can momentarily draw 50-100 mA inrush. Use a ferrite bead between the USB VBUS and the local 3.3 V regulator to isolate bus noise from the MCU supply. The nanoWatt Technology deep-sleep current is specified at <1 microamp typical - ensure all unused I/O pins are configured as outputs low or inputs with the weak pull-up disabled to avoid parasitic current paths.
Common pitfalls when designing with the PIC18F85J50T-I/PT include: (1) Forgetting the VUSB supply - the USB transceiver requires 3.0-3.6 V on pin 12 even when the USB peripheral is unused; (2) Exceeding 3.6 V on any VDD pin permanently damages the part - never back-power through I/O pins; (3) Using 5V signals on digital I/O - the PIC18J core is NOT 5V tolerant, level-shift any 5V system signals; (4) Choosing the wrong 'T' vs non-'T' packaging suffix - 'T' is Tape & Reel for SMT assembly, non-'T' ships in trays for prototyping. Estimated: with 65 active I/O at 20 MHz toggle rate, dynamic current can reach 25-30 mA - plan supply headroom accordingly.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - automotive applications should evaluate PIC18F85J50T-I/PTVAO. Industrial -40C to +85C operating range (I grade) per Microchip datasheet DS22002962.
