PIC18F26J50T-I/SO - 8-bit USB MCU 64KB Flash 28-SOIC | Microchip
MPN: PIC18F26J50T-I/SO ✓ Hoạt độngPIC18F26J50T-I/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and programmable peripherals. PIC18J-series MCUs use an enhanced Harvard RISC architecture with 16-bit instructions optimized for C code density, which is a common architecture in embedded control products. Within the broader taxonomy, this part is an 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC, with USB and XLP positioning it for connected, battery-powered endpoints.
Key features include the integrated Full-Speed USB 2.0 device transceiver, two USART, two MSSP (SPI/I2C), 10-bit ADC, multiple PWM outputs, and 25 digital I/O. Deep Sleep mode with RTCC draws nanoamp-level current, making the part attractive for always-on, USB-bus-powered applications. Hardware 32-bit CRC and a 31 kHz secondary oscillator improve data integrity and real-time-clock accuracy.
Typical applications include USB Human Interface Devices (HIDs), CDC serial-to-USB bridges, USB sensor and data-acquisition nodes, battery-powered instruments using XLP sleep modes, and industrial control front-ends with on-board USB diagnostics. The 28-SOIC footprint simplifies hand-soldering and rework, and the J-series peripheral set maps cleanly to legacy PIC18 designs.
When designing with this MCU, ensure the 3.3V regulator output is decoupled with 1 µF–10 µF ceramics near VUSB3V3, route D+/D– as a 90 Ω differential pair, and respect the 5.5V absolute maximum on non-USB-tolerant pins.
This page combines the manufacturer datasheet with distributor pricing and a verified cross-reference of pin-compatible drop-in alternatives, giving procurement and design engineers a single reference for sourcing and second-source decisions not found on any individual vendor page.
Bộ thay thế dễ dàng lắp đặt cho PIC18F26J50T-I/SO — 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 PIC18F26J50T-I/SO (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, Program Memory, ADC, Timers.
PIC18F26J50-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F25J50-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26J11T-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F25K80T-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2685-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26J50T-I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 (8-bit Harvard RISC) |
| Series | PIC® XLP™ 18J |
| Program Memory | 64 KB Flash (32K x 16) |
| RAM | 4 KB |
| Maximum CPU Speed | 48 MHz (12 MIPS) |
| USB Interface | USB 2.0 Full-Speed Device, integrated transceiver |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| On-chip 3.3 V Regulator | Yes (powers USB transceiver) |
| Digital I/O Pins | 25 |
| ADC | 10-bit, up to 13 channels |
| Communication | 2x USART, 2x MSSP (SPI/I2C) |
| Timers/PWM | Multiple 8/16-bit timers, PWM outputs |
| Low-Power Modes | nanoWatt XLP, Deep Sleep with RTCC |
| Nhiệt độ hoạt động | -40C to +85C (Industrial, "I") |
| Hộp | 28-pin SOIC (0.295 in / 7.50 mm width) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (per Microchip product page) |
Cấu hình chân PIC18F26J50T-I/SO
| Chân 1 | RA0/AN0 — Digital I/O / Analog input 0 / CVREF |
| Chân 2 | RA1/AN1 — Digital I/O / Analog input 1 |
| Chân 3 | RA2/AN2 — Digital I/O / Analog input 2 |
| Chân 4 | RA3/AN3 — Digital I/O / Analog input 3 / VREF+ |
| Chân 5 | RA4 — Digital I/O / Timer0 clock input |
| Chân 6 | RA5/AN4 — Digital I/O / Analog input 4 |
| Chân 7 | RA6/OSC2 — Digital I/O / Crystal oscillator output |
| Chân 8 | RA7/OSC1 — Digital I/O / Crystal oscillator input |
| Chân 9 | RB0/AN12 — Digital I/O / Analog input 12 / INT0 |
| Chân 10 | RB1/AN10 — Digital I/O / Analog input 10 |
| Chân 11 | RB2/AN8 — Digital I/O / Analog input 8 |
| Chân 12 | RB3/AN9 — Digital I/O / Analog input 9 |
| Chân 13 | RB4 — Digital I/O / KBI interrupt |
| Chân 14 | RB5/KBI1 — Digital I/O / KBI interrupt |
| Chân 15 | RB6/PGC — Digital I/O / ICSP clock |
| Chân 16 | RB7/PGD — Digital I/O / ICSP data |
| Chân 17 | VUSB3V3 — Internal 3.3 V USB regulator output (bypass cap) |
| Chân 18 | VDD — Core supply voltage 2.0 V - 3.6 V |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VCAP — Internal voltage regulator bypass (1 µF-10 µF cap) |
| Chân 21 | RC0 — Digital I/O |
| Chân 22 | RC1 — Digital I/O |
| Chân 23 | D- — USB Full-Speed D- line |
| Chân 24 | D+ — USB Full-Speed D+ line |
| Chân 25 | RC2 — Digital I/O |
| Chân 26 | RC3 — Digital I/O |
| Chân 27 | RC4 — Digital I/O |
| Chân 28 | RC5 — Digital I/O |
Ứng dụng tiêu biểu
PIC18F26J50T-I/SO phù hợp cho 6 Áp dụngs: USB HID Peripheral (Keyboard / Mouse / Custom HID), USB-to-Serial CDC Bridge, USB Data-Acquisition / Sensor Node, Battery-Powered Field Instrument, Industrial Control Front-End with USB Diagnostics, USB Audio Class (UAC1) Device.
USB HID Peripheral (Keyboard / Mouse / Custom HID)
The PIC18F26J50T-I/SO is purpose-built for USB Human Interface Devices thanks to its integrated Full-Speed USB 2.0 device transceiver with on-chip 3.3 V regulator - no external PHY or LDO required. With 64 KB Flash and 4 KB RAM it comfortably fits Microchip's USB HID stack plus custom report descriptors and debounce logic. The 48 MHz / 12 MIPS core sustains 1 ms polling at full USB bandwidth without CPU strain. Deep Sleep with RTCC makes battery-powered wireless mice viable. Designers should add ESD protection on D+/D- and follow USB-IF impedance guidance (90 Ω differential).
Được đề xuất
USB-to-Serial CDC Bridge
Use the PIC18F26J50T-I/SO as a CDC virtual COM port bridge, eliminating legacy UART cables and drivers. The integrated USB transceiver and on-chip 3.3 V regulator minimize external components, while 4 KB of RAM buffers CDC line-codes and interrupt packets at 12 Mbps Full Speed. The two on-chip USARTs can fan out to RS-232/RS-485 transceivers for industrial serial ports. nanoWatt XLP Deep Sleep mode enables bus-powered designs that respect USB suspend current limits of 2.5 mA.
Được đề xuất
USB Data-Acquisition / Sensor Node
Pair the PIC18F26J50T-I/SO with sensors and stream data over USB to a host PC. The 10-bit ADC (up to 13 channels) and 25 I/O pins handle multiple analog/digital sensors, while the integrated USB device provides a wired power and data link. The 64 KB Flash fits USB CDC plus firmware with calibration tables, and 4 KB RAM buffers sample bursts. Industrial temperature range (-40C to +85C) suits factory-floor and lab-instrument deployments.
Được đề xuất
Battery-Powered Field Instrument
Take advantage of nanoWatt XLP extreme-low-power modes to build battery-powered instruments that wake periodically to log and sync via USB. Deep Sleep with RTCC draws nanoamp-level current between samples, and the integrated 3.3 V regulator is gated by VBUS so the part can run directly off a single Li-ion cell when USB is disconnected. The 28-SOIC package simplifies hand-soldering during prototyping of low-volume field instrumentation.
Được đề xuất
Industrial Control Front-End with USB Diagnostics
Embed the PIC18F26J50T-I/SO as a 28-SOIC front-end MCU on an industrial controller, exposing a USB diagnostics port for field service. The integrated USB transceiver provides a robust maintenance interface, while 2x USART and 2x MSSP talk to upstream sensors, motor drivers, and actuators. Industrial -40C to +85C operation tolerates cabinet environments, and 64 KB Flash holds a USB stack plus application firmware. Pair with an isolated USB barrier for ESD/EMC hardening.
Được đề xuất
USB Audio Class (UAC1) Device
Implement a USB Audio Class 1 device such as a USB headset adapter or USB microphone dongle using the PIC18F26J50T-I/SO. The Full-Speed USB bandwidth supports mono/stereo PCM at 48 kHz, and 4 KB RAM buffers small audio frames without dropouts. The on-chip 3.3 V regulator simplifies bus-powered designs where the audio CODEC sits on the regulated rail. Designers should budget CPU cycles carefully - USB isochronous endpoints consume ~20% of the 12 MIPS budget at 48 kHz.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F26J50T-I/SO — 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 | PIC18F26J50-I/SO | PIC18F25J50-I/SO | PIC18F26J11T-I/SO | PIC18F25K80T-I/SO | PIC18F2685-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (7.50 mm) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Flash Memory | 64 KB | 64 KB | 32 KB | 64 KB | 64 KB | 96 KB |
| RAM | 4 KB | 4 KB | 3 KB | 4 KB | 3.6 KB | 3.3 KB |
| USB 2.0 Peripheral | Yes (FS, integrated transceiver) | Yes (FS, integrated) | Yes (FS, integrated) | No | No | No |
| Maximum Clock Speed | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 64 MHz / 16 MIPS | 40 MHz / 10 MIPS |
| Supply Voltage | 2.0 V - 3.6 V | 2.0 V - 3.6 V | 2.0 V - 3.6 V | 2.0 V - 3.6 V | 1.8 V - 5.5 V | 4.2 V - 5.5 V |
| Series / Family | PIC18J (XLP, USB) | PIC18J (XLP, USB) | PIC18J (XLP, USB) | PIC18J (XLP) | PIC18K (XLP) | PIC18F (legacy) |
| Unit Price (1 pc, ref) | $6.50 (as of 2026-09-27) | $6.20 (ref) | $5.80 (ref) | $5.40 (ref) | $4.30 (ref) | $5.10 (ref) |
Bảo phân biệt quan trọng
- Integrated Full-Speed USB 2.0 transceiver with on-chip 3.3 V regulator (vsPIC18F25K80T-I/SO)
- nanoWatt XLP Deep Sleep with RTCC (vsPIC18F2685-I/SO)
- 32K × 16 Flash architecture optimised for C code density (vsPIC18F25K80T-I/SO)
Ghi chú thiết kế
The internal 3.3 V regulator output (VUSB3V3, pin 17) must be decoupled with at least 1 µF of low-ESR ceramic (X7R recommended, 4.7 µF for USB compliance). The VCAP pin (pin 20) requires a separate 1 µF-10 µF ceramic to GND. Both capacitors should be placed within 3 mm of their respective pins to ensure USB signalling meets USB-IF impedance and ripple tolerances.
Route USB D+ (pin 24) and D- (pin 23) as a 90 Ω differential pair with continuous ground reference and length matching within 2 mm. Avoid routing other signals between them or beneath them. Place ESD protection (e.g. USBLC6-2SC6) within 10 mm of the connector. Keep the VBUS line ferrite-bead filtered and bypassed before reaching the MCU VUSB pin to suppress upstream switching noise.
Do not exceed 5.5 V on any non-USB-tolerant pin - the absolute maximum is 5.5 V even though VDD core is only 2.0-3.6 V. When migrating from the legacy PIC18F series, note that the J-series loses 5 V tolerance on most I/O. Enable pull-ups on D+ (RC4, pin 27) only after USB attach detection via the UCON register; leaving pull-ups active at power-up will enumerate as a low-power device and fail compliance.
Use a 4-layer PCB with continuous ground plane under the 28-SOIC footprint for noise-sensitive USB signals. If a 2-layer board is unavoidable, place a copper pour under the SOIC body, stitched with at least 8 vias to ground. Keep high-current traces away from D+/D- and the 31 kHz secondary oscillator pins to preserve USB signal integrity.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product page. AEC-Q100 qualification is not applicable for this commercial/industrial grade part; AEC-Q100-qualified PIC18 variants exist in the PIC18F K-series automotive line.
