PIC18F25K50-E/SP - 8-bit USB MCU, 32KB Flash, 48MHz | Microchip
MPN: PIC18F25K50-E/SP ✓ Hoạt độngPIC18F25K50-E/SP Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), working memory (RAM), and programmable I/O peripherals. PIC18 family microcontrollers use a 16-bit modified-Harvard architecture with 8-bit data bus, 31-level hardware stack, and a rich peripheral set including USB, ADC, PWM, and serial communication modules. They sit within the broader taxonomy: microcontroller -> embedded processor -> semiconductor IC -> active component.
Key features include 32KB Flash program memory with self read/write capability, 2KB RAM, 256 bytes EEPROM, 48MHz internal oscillator tunable from USB host clock (Active Clock Tuning), integrated USB 2.0 full-speed transceiver, 25 I/O pins with multiple interrupt-on-change sources, 10-bit ADC up to 14 channels, two CCP/ECCP modules, two comparators, and Master Synchronous Serial Port (MSSP) supporting SPI and I2C. The part belongs to Microchip's XLP (eXtreme Low Power) family with sleep currents down to ~20 nA typical.
The PIC18F25K50 core uses a 16-bit instruction word with 8-bit data path, executes one instruction per 4 clock cycles, and supports hardware 8x8 multiply. The integrated USB module handles full-speed (12 Mbps) device/host/OTG operation with on-chip transceiver and internal pull-up, eliminating the external USB components normally required. Active Clock Tuning automatically trims the internal HFINTOSC against the USB host frame clock for accurate baud-rate generation without external crystals.
Typical applications include USB peripherals (HID, CDC, MIDI, custom classes), USB-to-UART bridges, low-power sensor nodes, battery-powered consumer electronics, industrial control interfaces, and educational/development platforms. The wide 2.3V-5.5V supply range and low sleep current also suit solar-powered or energy-harvesting designs.
When designing with this device, note that the '-E' suffix indicates the Extended (-40C to +125C) operating temperature grade. The SPDIP package is best for prototyping and through-hole assembly; for volume production, equivalent parts in SOIC/SSOP/QFN packages are available within the same PIC18F25K50 family.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that supplement the manufacturer datasheet for faster engineering evaluation.
Bộ thay thế dễ dàng lắp đặt cho PIC18F25K50-E/SP — 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 PIC18F25K50-E/SP (cùng hình factor và footprint) — khác nhau ở ADC, Package, Operating Temperature, Program Memory (Flash), Core Architecture.
PIC18F25K50-I/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F25K42-E/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F25K22-E/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F24K50-E/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F25K20-E/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F25K50-E/SP Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 (8-bit data path, 16-bit instruction word) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 2 KB |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 48 MHz |
| Internal Oscillator | 48 MHz with USB Active Clock Tuning |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +125 C (Extended, -E suffix) |
| I/O Pins | 25 |
| USB Module | USB 2.0 Full-Speed (12 Mbps), Device/Host/OTG |
| ADC | 10-bit, up to 14 channels |
| CCP / ECCP Modules | 1 CCP + 1 ECCP |
| Comparators | 2 |
| Serial Interfaces | MSSP (SPI/I2C), EUSART (UART/LIN) |
| Timers | 4 (8-bit and 16-bit mixed) |
| Hộp | 28-pin SPDIP (Skinny Plastic DIP), through-hole |
| Kiểu lắp đặt | Through-Hole (THT) |
| Cấp MSL | Not applicable (through-hole part) |
| Trạng thái RoHS | Compliant |
| XLP Low-Power Sleep | Yes (typical sleep current ~20 nA) |
Cấu hình chân PIC18F25K50-E/SP
| Chân 1 | MCLR/RE3 — Master Clear (reset) input / RE3 digital input |
| Chân 2 | RA0 — Port A bit 0 / analog AN0 |
| Chân 3 | RA1 — Port A bit 1 / analog AN1 |
| Chân 4 | RA2 — Port A bit 2 / analog AN2 |
| Chân 5 | RA3 — Port A bit 3 / analog AN3 |
| Chân 6 | RA4 — Port A bit 4 / analog AN4 |
| Chân 7 | RA5 — Port A bit 5 / analog AN5 |
| Chân 8 | VSS — Ground |
| Chân 9 | OSC1/RA7 — Crystal oscillator input / Port A bit 7 |
| Chân 10 | OSC2/RA6 — Crystal oscillator output / Port A bit 6 |
| Chân 11 | RC0 — Port C bit 0 |
| Chân 12 | RC1 — Port C bit 1 |
| Chân 13 | RC2 — Port C bit 2 |
| Chân 14 | RC3 — Port C bit 3 |
| Chân 15 | RC4 — Port C bit 4 |
| Chân 16 | RC5 — Port C bit 5 |
| Chân 17 | RC6 — Port C bit 6 / TX |
| Chân 18 | RC7 — Port C bit 7 / RX |
| Chân 19 | VSS — Ground |
| Chân 20 | VDD — Positive supply voltage |
| Chân 21 | RB0 — Port B bit 0 / interrupt-on-change |
| Chân 22 | RB1 — Port B bit 1 / interrupt-on-change |
| Chân 23 | RB2 — Port B bit 2 / interrupt-on-change |
| Chân 24 | RB3 — Port B bit 3 / interrupt-on-change |
| Chân 25 | RB4 — Port B bit 4 / interrupt-on-change |
| Chân 26 | RB5 — Port B bit 5 / interrupt-on-change |
| Chân 27 | RB6 — Port B bit 6 / interrupt-on-change / ICSCLK |
| Chân 28 | RB7 — Port B bit 7 / interrupt-on-change / ICSDA |
Ứng dụng tiêu biểu
PIC18F25K50-E/SP phù hợp cho 6 Áp dụngs: USB HID Peripheral (Keyboard, Mouse, Custom HID), USB-to-UART Bridge / CDC Virtual COM Port, Battery-Powered Sensor Node with USB Charging/Diagnostics, MIDI Controller / USB Audio Class Device, Industrial Control Interface (Modbus, USB Diagnostic Port), Educational Development Board / Arduino-Compatible Module.
USB HID Peripheral (Keyboard, Mouse, Custom HID)
The PIC18F25K50-E/SP is ideal for USB HID-class peripherals such as keyboards, mice, custom HID controllers, and configuration dongles. Its integrated USB 2.0 full-speed transceiver and on-chip pull-up eliminate external USB components, reducing BOM cost and PCB area. With 32 KB Flash, 2 KB RAM, and 25 I/O pins, the device has ample headroom for HID report descriptors and scan matrix handling. The K50's Active Clock Tuning keeps baud-rate timing accurate without external crystals, which is critical for passing USB compliance tests. Developers can use the free Microchip USB Framework with MPLAB X IDE and the HID bootloader for field upgrades.
Được đề xuất
USB-to-UART Bridge / CDC Virtual COM Port
For USB-to-serial converter dongles that add a virtual COM port to legacy equipment, the PIC18F25K50-E/SP provides the USB device controller, the EUSART for asynchronous serial communication, and the 25 I/O pins needed for handshake signals (RTS/CTS). The integrated USB transceiver and the 48 MHz HFINTOSC tuned via Active Clock Tuning deliver tight baud-rate accuracy across all standard rates from 300 to 921600 bps. With 32 KB Flash, designers can ship a flexible CDC stack that handles configurable baud rates, hardware flow control, and signal inversion. The device supports bus-powered operation directly from USB VBUS (with internal 3.3V regulator), simplifying dongle designs.
Được đề xuất
Battery-Powered Sensor Node with USB Charging/Diagnostics
The PIC18F25K50-E/SP belongs to Microchip's XLP family with typical sleep current around 20 nA, making it well suited for battery-powered sensor nodes that wake periodically to take measurements and then return to deep sleep. The USB interface provides a convenient way to recharge, log diagnostic data, or upgrade firmware without an external programmer. With 10-bit ADC up to 14 channels, 2 comparators, and MSSP for SPI/I2C sensor interfaces, the device can read temperature, humidity, or pressure sensors directly. The 2.3-5.5V supply range accommodates single-cell Li-ion (3.7V nominal), two AA cells (3V), or coin cells (3V).
Được đề xuất
MIDI Controller / USB Audio Class Device
MIDI controllers and USB MIDI class devices benefit from the PIC18F25K50-E/SP's integrated USB and sufficient Flash for USB-MIDI descriptor stacks. Designers can implement USB MIDI 1.0 input endpoints and stream real-time NoteOn/NoteOff, PitchBend, and ControlChange messages from physical knobs, pads, and buttons. The 25 I/O pins drive the matrix scan of 8x8 button grids and read multi-channel potentiometers via the 10-bit ADC. The on-chip EUSART can also send legacy 5-pin DIN MIDI at 31250 bps if both USB and traditional MIDI ports are needed. The device's 48 MHz core ensures jitter-free USB MIDI isochronous transfer timing.
Được đề xuất
Industrial Control Interface (Modbus, USB Diagnostic Port)
In industrial control, the PIC18F25K50-E/SP serves as a smart sensor or actuator front-end with both a USB diagnostic port for technicians and an RS-485 Modbus interface for the fieldbus. The integrated USB simplifies commissioning, firmware updates, and parameter logging from a laptop running MPLAB or a custom tool. The EUSART supports RS-485 via an external transceiver, and the MSSP drives SPI-controlled ADCs or DACs on the local node. The -E extended temperature grade (-40C to +125C) supports cabinet and outdoor installations. Built-in 256-byte EEPROM stores calibration and unit IDs without external memory.
Được đề xuất
Educational Development Board / Arduino-Compatible Module
The PIC18F25K50-E/SP is popular in low-cost educational kits, Pinguino-compatible boards, and DIY learning platforms because the integrated USB removes the need for an external programmer for many applications. Hobbyists and students can develop in C using the free MPLAB X IDE with XC8 compiler, or in BASIC using the Pinguino IDE. The 28-pin SPDIP package fits standard 0.3-inch and 0.6-inch DIP sockets and breadboards, simplifying lab work. USB MIDI, USB CDC, USB HID, and bootloader examples in Microchip's library accelerate curriculum projects from blinking an LED to a full USB oscilloscope probe.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F25K50-E/SP — 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 | PIC18F25K50-I/SP | PIC18F25K42-E/SP | PIC18F25K22-E/SP | PIC18F24K50-E/SP | PIC18F25K20-E/SP |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SPDIP | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 1.5 KB |
| USB Module | Integrated USB 2.0 FS | Integrated USB 2.0 FS | USB 2.0 FS available on K42 family | No integrated USB | Integrated USB 2.0 FS | No integrated USB |
| Max CPU Frequency | 48 MHz | 48 MHz | 64 MHz | 64 MHz | 48 MHz | 64 MHz |
| Operating Temperature | -40 C to +125 C | -40 C to +85 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
| Supply Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V |
Bảo phân biệt quan trọng
- Integrated USB 2.0 full-speed transceiver with on-chip pull-up (vsPIC18F25K22-E/SP)
- Active Clock Tuning from USB host (vsPIC18F24K50-E/SP)
- XLP ultra-low sleep current (~20 nA) (vsPIC18F25K20-E/SP)
Ghi chú thiết kế
When bus-powered from USB VBUS (5V), the PIC18F25K50-E/SP's internal 3.3V regulator can supply up to ~150 mA to the core and external circuitry. For self-powered designs, provide a clean 3.3V or 5V rail to VDD with decoupling (100 nF + 10 uF ceramic bulk) within 5 mm of the pins. Place a ferrite bead on VUSB and a 0.1 uF bypass on the USB transceiver supply pin to meet USB compliance EMI margins.
USB D+ (pin 25, RB4) and D- (pin 24, RB3) traces must be routed as a 90-ohm differential pair, matched to within 150 mil length, and kept clear of switching signals. Series 27-33 ohm source-termination resistors close to the MCU are required per USB 2.0 spec. Do not place vias in the differential pair stubs; route directly to the USB connector with a clean ground return path.
Do not assume PIC18F25K22 vs PIC18F25K50 pin compatibility extends to USB - the K22 lacks the integrated USB transceiver entirely. If migrating a K22 design to USB, plan a firmware rewrite of the application stack and re-verify pinout reuse. Also note that the -E grade is Extended temperature while -I is Industrial; in commercial deployments, the -I grade is sufficient and cheaper.
Estimated: at 48 MHz CPU clock from 5V VDD, the PIC18F25K50-E/SP draws approximately 14 mA active current (~70 mW). Across the -40 to +125 C operating range, junction temperature rise in the SPDIP-28 package is negligible (<5 C above ambient with theta_JA around 70 C/W). No heatsink is required; standard PCB thermal relief is sufficient.
Thông tin tuân thủ
RoHS and lead-free compliance per Microchip product page. Not AEC-Q100 qualified for automotive. -E temperature grade (Extended, -40C to +125C) supports industrial but not automotive-qualified deployments. Halogen-free status not explicitly stated in verified web data.
