PIC18F26J11-I/SO - 64KB Flash 8-bit MCU USB | Microchip
MPN: PIC18F26J11-I/SO ✓ Hoạt độngPIC18F26J11-I/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and on-chip peripherals such as ADC, timers, communication interfaces, and I/O pins. The PIC18F26J11 belongs to the 8-bit MCU hypernymy: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor IC. It targets battery-powered and USB-connected devices where low standby current and flexible peripheral mapping reduce external component count and BOM cost.
Key features include 64 KB (32K x 16) self-programmable Flash, 4 KB RAM, 12 MIPS throughput at 48 MHz, on-chip Full-Speed USB 2.0 device/host/OTG, two USART, two MSSP (SPI/I2C), 10-bit ADC up to 10 channels, 2.0-3.6V single-supply operation, and deep-sleep current measured in nanoamps. PPS allows remapping of digital peripherals to any I/O pin, simplifying PCB routing in mixed-interface designs.
The architecture pairs a modified Harvard RISC core with a hardware multiply engine, a 10-channel 10-bit ADC with internal bandgap reference, four 16-bit timers, and dual analog comparators. The 28-pin SOIC exposes two capture/compare/PWM modules and the full USB transceiver block, allowing direct bus-powered or self-powered USB designs without external PHY ICs.
Typical applications include USB HID/CDC peripherals, low-power sensor nodes, industrial control panels, consumer appliances with USB firmware update, USB-to-UART bridge dongles, and battery-backed instrumentation. The deep-sleep mode with sub-microamp current makes it well suited to always-on duty-cycled IoT edge nodes.
When designing with this part, route the D+/D- USB pair as a 90-ohm differential with a 1.5 k pull-up on D- for Full-Speed device mode, and decouple VDD/VUSB with 100 nF plus 4.7 uF bulk capacitors within 5 mm of the pins. The PPS registers must be locked after configuration to prevent accidental remapping in the field.
Bộ thay thế dễ dàng lắp đặt cho PIC18F26J11-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 PIC18F26J11-I/SO (cùng hình factor và footprint) — khác nhau ở Package, Timers, Operating Temperature, ADC, I/O Pins.
PIC18F26J11T-I/SO
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Xem tài liệu →PIC18F25J11-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F24J11-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F25K80-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F25K50-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2685-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26J11-I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 8-bit RISC (modified Harvard) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 4 KB |
| Maximum CPU Frequency | 48 MHz (12 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| USB Interface | USB 2.0 Full-Speed Device/Host/OTG |
| ADC | 10-bit, up to 10 channels |
| Communication Peripherals | 2x USART, 2x MSSP (SPI/I2C) |
| Timers | 4x 16-bit Timer modules |
| Capture/Compare/PWM | 2x ECCP + 2x CCP |
| Analog Comparators | 2 |
| I/O Pins | 22 (on 28-pin SOIC) |
| Peripheral Pin Select (PPS) | Yes |
| Deep Sleep Current | nanoWatt XLP, sub-microamp standby |
| Hộp | 28-pin SOIC (300 mil, SO) |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, -I) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 1 |
Cấu hình chân PIC18F26J11-I/SO
| Chân 1 | RA3/AN3/C1IN+/C2IN+/VREF+ — Port A bit 3 / ADC input / comparator input / ADC positive reference |
| Chân 2 | RA4/AN4/C1OUT/T0CKI — Port A bit 4 / ADC input / comparator 1 output / Timer0 clock input |
| Chân 3 | RA5/AN5/C2OUT — Port A bit 5 / ADC input / comparator 2 output |
| Chân 4 | RA6 — Port A bit 6 (general digital I/O) |
| Chân 5 | RA7 — Port A bit 7 (general digital I/O) |
| Chân 6 | VSS — Ground reference |
| Chân 7 | VDD — Positive supply voltage 2.0-3.6 V |
| Chân 8 | RB0/INT0/FLT0 — Port B bit 0 / external interrupt 0 / PWM fault input |
| Chân 9 | RB1/INT1 — Port B bit 1 / external interrupt 1 |
| Chân 10 | RB2/INT2 — Port B bit 2 / external interrupt 2 |
| Chân 11 | RB3 — Port B bit 3 (general digital I/O) |
| Chân 12 | RB4 — Port B bit 4 (general digital I/O) |
| Chân 13 | RB5 — Port B bit 5 (general digital I/O) |
| Chân 14 | RB6/PGC — Port B bit 6 / ICSP clock |
| Chân 15 | RB7/PGD — Port B bit 7 / ICSP data |
| Chân 16 | VSS — Ground reference |
| Chân 17 | VDD — Positive supply voltage 2.0-3.6 V |
| Chân 18 | VUSB — USB 3.3 V transceiver supply |
| Chân 19 | RC0 — Port C bit 0 (general digital I/O) |
| Chân 20 | RC1 — Port C bit 1 (general digital I/O) |
| Chân 21 | RC2 — Port C bit 2 (general digital I/O) |
| Chân 22 | RC3 — Port C bit 3 (general digital I/O) |
| Chân 23 | D- — USB Full-Speed data minus |
| Chân 24 | D+ — USB Full-Speed data plus |
| Chân 25 | RC4 — Port C bit 4 (general digital I/O) |
| Chân 26 | RC5 — Port C bit 5 (general digital I/O) |
| Chân 27 | RC6 — Port C bit 6 (general digital I/O) |
| Chân 28 | RC7 — Port C bit 7 (general digital I/O) |
Ứng dụng tiêu biểu
PIC18F26J11-I/SO phù hợp cho 6 Áp dụngs: USB HID/CDC Peripheral Device, Low-Power Sensor Node, Industrial Control Panel Interface, USB-to-UART Bridge Dongle, Consumer Appliance with USB Firmware Update, Battery-Backed Instrumentation.
USB HID/CDC Peripheral Device
The PIC18F26J11-I/SO's integrated USB 2.0 Full-Speed transceiver and 64 KB Flash make it well suited for USB HID keyboards, CDC virtual COM ports, and custom vendor-class peripherals. Its 12 MIPS throughput at 48 MHz handles the USB 1 ms polling frame plus protocol stack with margin, while PPS allows flexible pin assignment for the D+/D- pair and indicator LEDs. NanoWatt XLP deep-sleep mode (< 1 uA) enables bus-powered designs where suspend current must stay under 2.5 mA per USB spec.
Được đề xuất
Low-Power Sensor Node
The PIC18F26J11-I/SO excels in battery-backed sensor nodes thanks to nanoWatt XLP technology with sub-microamp deep-sleep current and 64 KB Flash for sensor-fusion code. Its 2.0-3.6 V supply range accepts a single Li-ion or two AA cells, while the 10-bit ADC with internal bandgap reference digitizes thermistor, battery voltage, and analog sensor channels. PPS lets designers route I2C sensor buses, UART debug output, and interrupt-driven wake-up lines to any spare GPIO without PCB rework.
Được đề xuất
Industrial Control Panel Interface
The PIC18F26J11-I/SO fits industrial control panel HMIs and keypad/display interfaces with its 22 GPIO, two USART, and 4 KB RAM for menu state machines. The 28-SOIC package is easy to hand-solder for prototyping and survives -40 C to +85 C industrial temperature. PPS allows the SPI LCD bus, I2C keypad scanner, and UART to the main controller to be remapped without swapping PCB layers, reducing layout iterations.
Được đề xuất
USB-to-UART Bridge Dongle
The PIC18F26J11-I/SO is ideal for USB-to-UART bridge dongles because its on-chip USB transceiver pairs with two USART channels for transparent serial bridging. The 64 KB Flash accommodates USB stack, CDC class driver, and user I/O handling with code headroom for proprietary protocols. The 28-SOIC is small enough for dongle form factors, while 3.3 V single-supply operation simplifies LDO selection downstream of the USB 5 V bus.
Được đề xuất
Consumer Appliance with USB Firmware Update
The PIC18F26J11-I/SO serves consumer appliances that need in-field firmware updates via USB, leveraging its self-programmable Flash and dual memory regions. The integrated USB supports host mode for flash-drive bootloaders or device mode for PC-driven updates without external programmers. The wide 2.0-3.6 V supply range accepts regulated 3.3 V from common appliance SMPS designs, while PPS simplifies routing when the USB connector is far from the main PCB.
Được đề xuất
Battery-Backed Instrumentation
The PIC18F26J11-I/SO is well matched to battery-backed instruments like portable data loggers and handheld meters, combining 64 KB Flash for sample storage buffers and nanoWatt XLP for long shelf life. The 10-bit ADC with internal reference digitizes sensor signals without external reference ICs, while two analog comparators provide low-battery and signal-threshold detection. The -40 C to +85 C industrial temperature rating supports outdoor and laboratory environments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F26J11-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 | PIC18F26J11T-I/SO | PIC18F25J11-I/SO | PIC18F24J11-I/SO | PIC18F25K80-I/SO | PIC18F25K50-I/SO | PIC18F2685-I/SO |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Flash Memory | 64 KB | 64 KB | 32 KB | 32 KB | 32 KB | 32 KB | 96 KB |
| RAM | 4 KB | 4 KB | 3.8 KB | 3.8 KB | 3.6 KB | 2.4 KB | 3.3 KB |
| Max CPU Speed | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 64 MHz (16 MIPS) | 48 MHz (12 MIPS) | 40 MHz (10 MIPS) |
| USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | None (no USB) | USB 2.0 Full-Speed | None (no USB) |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | Yes | Yes | No (legacy core) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
Bảo phân biệt quan trọng
- Largest Flash in J-series 28-SOIC family (vsPIC18F25J11-I/SO)
- On-chip USB with PPS flexibility (vsPIC18F2685-I/SO)
- XLP nanoWatt deep-sleep (vsPIC18F2685-I/SO)
Ghi chú thiết kế
Place a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pin pair, and a 4.7 uF bulk capacitor near the VUSB pin for USB transceiver stability. The USB 3.3 V rail on VUSB must be sourced from either the internal 3.3 V regulator or an external LDO when USB is enabled. Use a star-ground topology separating the USB D+/D- return path from noisy digital return currents to meet USB 2.0 signal-integrity masks.
Route the D+ and D- USB traces as a 90-ohm differential pair with matching length, keeping them short and isolated from switching traces. The VUSB decoupling cap should be within 3 mm of pin 18. Place the ICSP pins (RB6/RB7) on a 0.1 inch header footprint for debug access without disturbing the main PCB layout. PPS mapping must be finalized before code freeze to avoid late-stage PCB respins.
Do not exceed 3.6 V on any VDD pin; the 18J series is NOT 5V tolerant on I/O. The D+ and D- pins must NOT be pulled high externally except via the internal 1.5 k pull-up enabled in firmware, otherwise the USB host may misdetect the device speed. The PPS registers must be unlocked, written, and re-locked at startup; leaving them unlocked risks accidental remapping by runaway code.
Thông tin tuân thủ
RoHS compliant per Microchip product page and FindMyChip listing. Not AEC-Q100 qualified - select automotive-grade PIC18 variants for vehicle applications. Halogen-free per Microchip environmental compliance data.
