PIC18F66J50T-I/PT - 8-Bit 48MHz USB MCU, 64KB Flash | Microchip
MPN: PIC18F66J50T-I/PT ✓ Hoạt độngPIC18F66J50T-I/PT Tóm tắt
What is a microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), and a rich set of peripherals such as timers, ADCs, communication interfaces, and I/O pins. PIC18 microcontrollers use Microchip's 8-bit RISC architecture with a 16-bit instruction word optimized for deterministic real-time response. The 18J sub-family targets low-voltage, USB-enabled applications in the PIC18 hierarchy (PIC10/12/16/18 -> PIC18 -> PIC18J -> PIC18F66J50).
Key features of the PIC18F66J50 include Full-Speed USB 2.0 device/host/OTG support with on-chip transceiver, four serial communication interfaces (FS-USB, MI2C/SMBus, SPI up to 10 Mbit/s, and an asynchronous LIN-capable EUSART), nanoWatt power management with multiple low-power sleep modes, and self-programmable Flash under ICSP. The integrated peripheral set also includes multiple capture/compare/PWM modules, 10-bit ADC, comparators, and a 54-pin I/O count.
Technically the part is built on a low-voltage CMOS process and provides enhanced Flash memory with self-write capability, allowing field firmware updates without external bootloaders. Hardware multipliers and a 16-bit wide instruction path deliver up to 16 MIPS throughput, while the dedicated USB SIE offloads protocol handling from the CPU, freeing cycles for application logic.
Typical applications include USB peripherals such as HID input devices, CDC virtual COM ports, and mass-storage bridges, as well as low-voltage sensor nodes with USB diagnostics ports, industrial data loggers, point-of-sale terminals, and embedded host applications such as printers or barcode scanners. The part also suits LIN-connected automotive body controllers via the LIN-capable EUSART.
When designing with this device, ensure the VUSB 3.3V LDO is properly decoupled (typically 0.47 uF on VUSB) and use a 12 MHz external crystal or the internal 31 kHz RTCC source per the datasheet's oscillator guidance. Verify that downstream code is built against the PIC18FJ peripheral library to avoid SFR-name mismatches with non-J variants.
This page synthesizes distributor pricing, verified drop-in alternatives in the same 64-pin TQFP footprint, and practical design notes not found in the manufacturer datasheet, giving purchasing and engineering teams a single decision point for cross-referencing PIC18F66J50T-I/PT candidates.
Bộ thay thế dễ dàng lắp đặt cho PIC18F66J50T-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 PIC18F66J50T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, Timers, Program Memory (Flash).
PIC18F66J50-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F66J55-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F65J50T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F66J15T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F67J50T-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F66J50T-I/PT Tỷ lệ tối đa & tính chất điện
| Core | PIC18 (8-bit RISC, 16-bit instruction word) |
| Series | PIC18J (PIC® 18J family) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| RAM | 3.9 KB (3936 bytes) |
| Maximum CPU Frequency | 48 MHz (8 MIPS / 16 MIPS depending on clock mode) |
| Điện áp cung cấp | 2.0 V to 3.6 V |
| I/O Pins | 54 |
| Hộp | 64-pin TQFP (PT) 10 x 10 mm |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, "I") |
| USB | USB 2.0 Full-Speed (12 Mbit/s), Device/Host/OTG, on-chip transceiver |
| Serial Interfaces | MI2C/SMBus, SPI (up to 10 Mbit/s), EUSART (LIN-capable async), FS-USB |
| ADC | 10-bit |
| Power Management | nanoWatt with multiple low-power sleep modes |
| Self-Programmable Flash | Yes (ICSP) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F66J50T-I/PT
| Chân 1 | RC2 — Digital I/O / PWM / Comparator output |
| Chân 2 | RC3 — Digital I/O / SPI SCK |
| Chân 3 | RC4 — Digital I/O / USB D- |
| Chân 4 | RC5 — Digital I/O / USB D+ |
| Chân 5 | RC6 — Digital I/O / EUSART TX |
| Chân 6 | RC7 — Digital I/O / EUSART RX |
| Chân 7 | RD0 — Digital I/O / PSP data |
| Chân 8 | RD1 — Digital I/O / PSP data |
| Chân 9 | RD2 — Digital I/O / PSP data |
| Chân 10 | RD3 — Digital I/O / PSP data |
| Chân 11 | VUSB — Internal USB 3.3V LDO output, decouple 0.47 uF |
| Chân 12 | VDD — Digital supply voltage (2.0 V to 3.6 V) |
| Chân 13 | VSS — Digital ground reference |
| Chân 14 | RB0 — Digital I/O / INT0 external interrupt |
| Chân 15 | RB1 — Digital I/O / INT1 external interrupt |
| Chân 16 | RB2 — Digital I/O / INT2 external interrupt |
| Chân 17 | RB3 — Digital I/O / INT3 external interrupt |
| Chân 18 | RB4 — Digital I/O / IOC |
| Chân 19 | RB5 — Digital I/O / IOC / PMD |
| Chân 20 | RB6 — Digital I/O / PGC (ICSP clock) |
| Chân 21 | RB7 — Digital I/O / PGD (ICSP data) |
| Chân 22 | RA0 — Digital I/O / analog AN0 |
| Chân 23 | RA1 — Digital I/O / analog AN1 |
| Chân 24 | RA2 — Digital I/O / analog AN2 |
| Chân 25 | RA3 — Digital I/O / analog AN3 / VREF+ |
| Chân 26 | RA4 — Digital I/O / analog AN4 |
| Chân 27 | RA5 — Digital I/O / analog AN5 / HLVDIN |
| Chân 28 | VSS — Digital ground reference |
| Chân 29 | VDD — Digital supply voltage (2.0 V to 3.6 V) |
| Chân 30 | OSC1 — Crystal/clock input |
| Chân 31 | OSC2 — Crystal/clock output |
| Chân 32 | RE0 — Digital I/O / PSP RD |
| Chân 33 | RE1 — Digital I/O / PSP WR |
| Chân 34 | RE2 — Digital I/O / PSP CS |
| Chân 35 | RE3 — Digital I/O |
| Chân 36 | RE4 — Digital I/O |
| Chân 37 | RE5 — Digital I/O |
| Chân 38 | RE6 — Digital I/O |
| Chân 39 | RE7 — Digital I/O |
| Chân 40 | AVDD — Analog supply voltage |
| Chân 41 | AVSS — Analog ground reference |
| Chân 42 | RF0 — Digital I/O / analog AN6 |
| Chân 43 | RF1 — Digital I/O / analog AN7 |
| Chân 44 | RF2 — Digital I/O / analog AN8 |
| Chân 45 | RF3 — Digital I/O / analog AN9 |
| Chân 46 | RF4 — Digital I/O / analog AN10 |
| Chân 47 | RF5 — Digital I/O / analog AN11 |
| Chân 48 | RF6 — Digital I/O / analog AN12 |
| Chân 49 | RF7 — Digital I/O / analog AN13 |
| Chân 50 | RG0 — Digital I/O |
| Chân 51 | RG1 — Digital I/O |
| Chân 52 | RG2 — Digital I/O |
| Chân 53 | RG3 — Digital I/O |
| Chân 54 | RG4 — Digital I/O |
| Chân 55 | RG5 — Digital I/O |
| Chân 56 | RG6 — Digital I/O |
| Chân 57 | RG7 — Digital I/O |
| Chân 58 | RH0 — Digital I/O |
| Chân 59 | RH1 — Digital I/O |
| Chân 60 | RH2 — Digital I/O |
| Chân 61 | RH3 — Digital I/O |
| Chân 62 | RH4 — Digital I/O |
| Chân 63 | RH5 — Digital I/O |
| Chân 64 | RH6 — Digital I/O |
Ứng dụng tiêu biểu
PIC18F66J50T-I/PT phù hợp cho 6 Áp dụngs: USB HID Input Devices, USB-to-UART Bridge, Industrial Data Logger with USB Dump, Embedded USB Host (Printer/Barcode), Point-of-Sale Terminal / Kiosk Node, Automotive LIN Body Controller.
USB HID Input Devices
The PIC18F66J50T-I/PT's on-chip USB 2.0 Full-Speed SIE and 48 MHz PIC18J core make it a natural fit for USB Human Interface Devices such as keyboards, mice, game controllers, and custom HID peripherals. With 64 KB Flash it accommodates full HID descriptor stacks plus application logic, while 3.9 KB RAM handles HID report buffers. The on-chip transceiver eliminates external USB PHY parts, shrinking BOM. Use a 12 MHz crystal tied to the USB module for jitter-free signaling, and connect the upstream port through the dedicated D+/D- pins.
Được đề xuất
USB-to-UART Bridge
For CDC virtual COM port bridges the PIC18F66J50T-I/PT offers native USB plus an EUSART that can drive RS-232/RS-485 transceivers. The 48 MHz core supports sustained 115200 bps and beyond with full-speed USB bulk transfers. 64 KB Flash holds the CDC class driver and any manufacturer-specific protocol extensions, while nanoWatt sleep modes cut idle current when the host suspends the bus. Decouple VUSB with 0.47 uF and follow Microchip's USB hardware checklist for EMI.
Được đề xuất
Industrial Data Logger with USB Dump
The 3.9 KB RAM, 10-bit ADC and Full-Speed USB make PIC18F66J50T-I/PT ideal for small industrial data loggers that store sensor samples in RAM and periodically dump over USB. SPI up to 10 Mbit/s interfaces to external Flash or FRAM for non-volatile logs, and the LIN-capable EUSART can read sensor data from automotive/LIN sub-buses. The industrial -40 C to +85 C rating covers shop-floor environments, and 54 I/O pins tolerate numerous analog and digital sensors on one board.
Được đề xuất
Embedded USB Host (Printer/Barcode)
The PIC18F66J50T-I/PT supports USB host mode, enabling low-cost embedded hosts for printers, barcode scanners, or mass-storage devices. With 48 MHz CPU and 64 KB Flash it runs Microchip's USB host stack plus class drivers. The 54 I/O pins provide LCD/keypad interfaces, while the LIN-capable EUSART or SPI talks to wireless modules. The part runs from 2.0 V to 3.6 V, allowing single-cell Li-ion designs with USB-powered charging paths.
Được đề xuất
Point-of-Sale Terminal / Kiosk Node
The PIC18F66J50T-I/PT suits POS terminals and self-service kiosks that need USB device connectivity plus multiple serial peripherals for mag-stripe readers, NFC modules, and thermal printers. Its 48 MHz core and 64 KB Flash handle USB plus multiple UART/SPI transactions concurrently. nanoWatt power-down modes cut idle consumption between transactions, and the 64-pin TQFP exposes enough I/O for keypad scanning and LCD drive. Industrial temperature range supports semi-outdoor kiosk enclosures.
Được đề xuất
Automotive LIN Body Controller
The LIN-capable EUSART on PIC18F66J50T-I/PT enables LIN slave nodes for body electronics such as mirror controllers, seat modules, or roof consoles. The 48 MHz core handles LIN 2.x scheduling, while 64 KB Flash stores the LIN descriptor and diagnostic services. The USB interface allows factory firmware update via a service tool without an extra programmer. Industrial -40 C to +85 C range covers cabin environments; for under-hood use consider AEC-Q100 qualified PIC18 K-series alternatives.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F66J50T-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 | PIC18F66J50-I/PT | PIC18F66J55-I/PT | PIC18F65J50T-I/PT | PIC18F66J15T-I/PT | PIC18F67J50T-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-64 (PT) | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| RAM | 3.9 KB | 3.9 KB | 3.9 KB | 3.9 KB | 3.9 KB | 3.9 KB |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| USB Interface | USB 2.0 FS with on-chip transceiver | USB 2.0 FS with on-chip transceiver | USB 2.0 FS with on-chip transceiver | USB 2.0 FS with on-chip transceiver | No USB peripheral | USB 2.0 FS with on-chip transceiver |
| I/O Pins | 54 | 54 | 54 | 53 | 54 | 54 |
| 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 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| On-chip Crypto Engine | No | No | Yes | No | No | No |
Bảo phân biệt quan trọng
- On-chip USB 2.0 Full-Speed transceiver eliminates external PHY (vsPIC18F66J15T-I/PT)
- Highest I/O count in the PIC18J 64-pin TQFP family (vsPIC18F65J50T-I/PT)
- Broader peripheral set than lower-cost PIC18F variants (vsPIC18F4550-I/P)
Ghi chú thiết kế
Decouple VUSB (pin 11) with a 0.47 uF ceramic capacitor placed within 5 mm of the pin, per Microchip's USB hardware checklist. VDD/AVDD should each have 100 nF plus 10 uF bulk ceramic. Avoid tying AVDD and VDD together on the supply side without a ferrite bead if the ADC accuracy at >10 kHz sample rates matters.
Route the USB D+/D- pair as a 90-ohm differential with matched length and keep them clear of clock traces. Place the 12 MHz crystal (or resonator) within 5 mm of OSC1/OSC2 with a guard ring tied to GND. Use a four-layer PCB with continuous ground plane under the TQFP for thermal dissipation and EMI.
Do not omit the VUSB 0.47 uF decoupling capacitor - USB enumeration will fail without it. When migrating firmware from non-J PIC18 (PIC18F4550 etc.), update SFR names because the 18J family uses slightly different register layouts. Confirm the CONFIG bits for oscillator mode and WDT before first programming; a wrong FOSC setting bricks USB clocking silently.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. PIC18F66J50T-I/PT is not AEC-Q100 qualified; for automotive use evaluate PIC18F25K80 or other K-series qualified parts.
