PIC18F13K50-I/SS - 8-bit USB MCU 8KB Flash | Microchip
MPN： PIC18F13K50-I/SS ✓ 啟用中PIC18F13K50-I/SS 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (typically Flash), volatile working memory (RAM), and a set of peripheral interfaces such as timers, ADC, communication ports, and I/O pins. The PIC18F family sits in Microchip's 8-bit enhanced MCU portfolio, designed for deterministic interrupt-driven applications. Within that family, the '13K50' variant uniquely integrates a USB 2.0 full-speed peripheral plus nanoWatt XLP ultra-low-power technology, making it the lowest-pin-count member of the PIC18 USB-capable line.
Key features include 15 digital I/O pins, a 10-bit ADC with up to 11 input channels, an internal 31 kHz to 16 MHz configurable oscillator plus a 96 MHz PLL for USB, hardware I²C/SPI/EUSART, mTouch capacitive touch support, and nanoWatt XLP sleep currents under 100 nA typical. The integrated USB transceiver with on-chip 3.3V regulator eliminates external USB PHY components, reducing BOM for HID, CDC, and custom-class USB devices.
Architecturally, the device uses an enhanced 8-bit Harvard RISC core with a hardware multiplier and C-friendly compiler support through MPLAB XC8. The peripheral set is fixed-function rather than the configurable 'F1xx' PPS variant, which keeps the silicon small and reduces cost, while a 14-bit instruction word provides uniform instruction timing for predictable interrupt latency.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), USB-to-UART bridges (CDC class), low-cost USB sensors, USB automotive interfaces, hobbyist and educational development boards, and battery-powered touch-sensing devices. The combination of native USB, mTouch, and nanoWatt XLP makes it particularly attractive for powered-from-bus designs that must minimize suspend current to comply with USB 2.0 suspend specifications.
When designing, attention must be paid to the VUSB 3.3V regulator pin decoupling and the DP/DNM pull-up configuration. A ferrite bead or direct short between VUSB and the MCU VDD, plus a 220 nF + 47 µF bulk capacitor network, is typically required to meet USB-IF electrical compliance.
直接替換替代品，適用於 PIC18F13K50-I/SS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18F13K50-I/SS （相同外形與佔位） — 差異在於 ADC, Package, Program Memory (Flash), Core Architecture, Timers.
PIC18F14K50-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF13K50-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC18F13K22-I/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F13K50-I/SS 最大額定值與電氣特性
| Core Architecture | 8-bit PIC18 enhanced Harvard RISC |
| Program Memory (Flash) | 8 KB (4K x 16 words) |
| Data RAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 48 MHz |
| USB Interface | USB 2.0 Full-Speed (12 Mbps) device with on-chip transceiver |
| Digital I/O Pins | 15 |
| ADC | 10-bit, up to 11 input channels |
| Timers | 3 (Timer0/Timer1/Timer2) |
| Capture/Compare/PWM | 1 ECCP + 1 CCP |
| Communication Interfaces | EUSART (UART), I²C, SPI |
| Capacitive Touch | mTouch peripheral supported |
| Operating Voltage | 1.8 V to 5.5 V (with USB regulator disabled), 4.2 V to 5.5 V with USB |
| 工作溫度 | -40 °C to +85 °C (Industrial) |
| 封裝 | 20-pin SSOP (5.30 mm) |
| Low-Power Technology | nanoWatt XLP (sleep current < 100 nA typical) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
PIC18F13K50-I/SS 腳位配置
| 腳位 1 | RA0/AN0 — Digital I/O / analog input channel 0 |
| 腳位 2 | RA1/AN1 — Digital I/O / analog input channel 1 |
| 腳位 3 | RA2/AN2 — Digital I/O / analog input channel 2 |
| 腳位 4 | RA3/AN3/VREF+ — Digital I/O / analog input / positive voltage reference |
| 腳位 5 | RA5/AN4 — Digital I/O / analog input channel 4 |
| 腳位 6 | RA4 — Digital I/O (no AN) |
| 腳位 7 | VSS — Ground |
| 腳位 8 | OSC1/CLKIN — Crystal / external clock input |
| 腳位 9 | OSC2/CLKOUT — Crystal / clock output |
| 腳位 10 | D-/RC4 — USB D- data / digital I/O RC4 |
| 腳位 11 | D+/RC5 — USB D+ data / digital I/O RC5 |
| 腳位 12 | VUSB — Internal USB 3.3V regulator output (decoupling point) |
| 腳位 13 | RC6 — Digital I/O RC6 |
| 腳位 14 | RC7 — Digital I/O RC7 |
| 腳位 15 | RB4/AN10 — Digital I/O RB4 / analog input channel 10 |
| 腳位 16 | RB5/AN11 — Digital I/O RB5 / analog input channel 11 |
| 腳位 17 | RB6/ICSPCLK — Digital I/O RB6 / ICSP clock (programming) |
| 腳位 18 | RB7/ICSPDAT — Digital I/O RB7 / ICSP data (programming) |
| 腳位 19 | VDD — Positive supply voltage |
| 腳位 20 | VDD — Positive supply voltage (redundant) |
典型應用
PIC18F13K50-I/SS 適用於 7 應用s: USB HID Input Devices, USB-to-UART Bridge (CDC Class), USB Sensor / Data Logger, Battery-Powered Touch-Sense Dongle, Educational / Hobby USB Development, USB Automotive / Industrial Interface, USB Custom / Vendor Class Device.
USB HID Input Devices
The PIC18F13K50-I/SS integrates a USB 2.0 full-speed device controller with on-chip transceiver and 3.3V regulator, eliminating external PHY components for HID-class peripherals. With 8 KB Flash and 512 B RAM, firmware comfortably fits Microchip's free USB HID stack and a small main loop. The 48 MHz instruction pipeline keeps interrupt latency low enough for keyboards and mice polling at standard 125 Hz-1000 Hz rates.
推薦
USB-to-UART Bridge (CDC Class)
The PIC18F13K50-I/SS implements USB CDC to provide a virtual COM port on the host, paired with the on-chip EUSART to expose a serial port to a target MCU. The 10-bit ADC can read supply or signal-rail voltages for telemetry over USB. The nanoWatt XLP sleep mode lets the bridge enter USB suspend while still allowing host wake-up via remote-wakeup signaling, fully compliant with the USB 2.0 specification.
推薦
USB Sensor / Data Logger
With its on-chip 10-bit ADC and 11 analog input channels, the PIC18F13K50-I/SS streams sensor data through USB CDC or custom bulk class. The 256-byte EEPROM stores calibration constants, while 512 B RAM holds short log buffers before upload. Powered from the USB bus, the device enumerates and streams continuously, and the integrated 3.3 V regulator from VUSB powers external analog circuitry.
推薦
Battery-Powered Touch-Sense Dongle
The mTouch peripheral in the PIC18F13K50-I/SS reads capacitive buttons, sliders, and proximity without external components, while the nanoWatt XLP sleep mode under 100 nA typical lets battery power outlast shelf life. Touch events wake the MCU, perform USB HID scan, and re-enter sleep - the combination is uniquely suited to small key-fob style USB peripherals.
推薦
Educational / Hobby USB Development
The PIC18F13K50-I/SS drops directly onto Microchip's Low Pin Count USB Development Board and similar hobby kits, exposing every I/O including the VUSB regulator. Free MPLAB X IDE and MPLAB XC8 C compiler support it, and the USB bootloader allows firmware drag-and-drop over USB without an external programmer - ideal for student labs and rapid prototyping.
推薦
USB Automotive / Industrial Interface
The industrial-grade -40 °C to +85 °C temperature rating of the PIC18F13K50-I/SS permits deployment in vehicle cabin infotainment testing equipment and factory-floor diagnostic tools. The USB CDC class streams OBD-II-style diagnostic streams, the 10-bit ADC monitors battery voltage, and the wide 4.2 V to 5.5 V supply matches regulated 5 V USB bus power.
推薦
USB Custom / Vendor Class Device
Beyond HID and CDC, the PIC18F13K50-I/SS supports USB vendor-class firmware for proprietary protocols - data acquisition cards, USB audio controls, or industrial test fixtures. Bulk endpoints pair with the on-chip DMA-style buffering logic; the 48 MHz core easily streams audio control or telemetry packets above 64 KB/s without dropping frames.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F13K50-I/SS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18F14K50-I/SS | PIC18LF13K50-I/SS | PIC18F13K22-I/SS |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP (5.30 mm) | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Core | 8-bit PIC18 48 MHz | 8-bit PIC18 48 MHz - same | 8-bit PIC18LF 48 MHz - same core | 8-bit PIC18 64 MHz - slightly faster |
| Program Flash | 8 KB | 16 KB (+100%) | 8 KB - same | 8 KB - same |
| Data RAM | 512 B | 768 B (+50%) | 512 B - same | 512 B - same |
| USB 2.0 Full-Speed | Yes (on-chip transceiver) | Yes - same | Yes - same | No (USB-less variant) |
| Operating Voltage (USB) | 4.2 V - 5.5 V | 4.2 V - 5.5 V | 2.0 V - 3.6 V (F-version; no USB above 3.6V) | 1.8 V - 5.5 V (no USB) |
| mTouch Support | Yes (CTMU + ADC) | Yes - same | Yes - same | Yes - same |
| ADC | 10-bit, 11 channels | 10-bit, 11 channels - same | 10-bit, 11 channels - same | 10-bit, 11 channels - same |
| Datasheet Doc No. | DS41350C / 41350C | DS41350C (same datasheet family) | DS41350C (same family) | DS41342C (different family) |
主要差異化特點
- Smallest-pin-count USB-enabled PIC18 MCU in production (對比PIC18F2550-I/SP)
- On-chip 3.3V USB regulator eliminates external LDO (對比PIC18F2550-I/SP)
- Doubles Flash and RAM in pin-compatible upgrade (對比PIC18F14K50-I/SS)
- Ultra-low-power nanoWatt XLP for battery applications (對比PIC18F13K22-I/SS)
設計說明
The on-chip 3.3V USB regulator on the VUSB pin requires a 220 nF ceramic capacitor close to VUSB plus a 4.7-10 µF bulk capacitor on VDD when the regulator is active. Without proper bulk capacitance the regulator can oscillate and cause the host to enumerate/disconnect repeatedly. For bus-powered designs drawing more than 100 mA, route VUSB to an external 3.3V LDO and disable the internal regulator to improve thermal performance.
USB 2.0 full-speed requires the D+/D- traces to be 90 Ω differential, matched length, and routed over a continuous ground plane. Place the series 27 Ω source termination resistors near the MCU pins, keep the D+/D- trace length under 50 mm, and avoid routing D+/D- near high-frequency clocks or switching power traces to pass USB-IF compliance testing.
Configure the CONFIG1L register to disable the Watchdog Timer (WDT) if you do not require it, and set CONFIG3H.BOREN = ON to enable brownout reset at 4.0 V minimum. Leave the VUSB pin floating only if the USB peripheral is unused. Always include a 10 kΩ pull-up on MCLR to avoid accidental reset during power-up, and select the internal HFINTOSC + PLL for USB applications to relax the external crystal requirement.
When using the EUSART in SPI high-speed mode above 4 MHz, ensure that SCK trace length matches SDI/SDO and avoid stubs on the bus. Place 10 kΩ pull-ups on I²C SCL/SDA. The mTouch CTMU counts capacitive discharge times - shield touch lines with a ground trace to reduce environmental coupling, and rerun the TouchTuneGUI calibration if mechanical housing changes by more than 0.5 mm.
Place the 20-SSOP on a single ground island surrounded by copper pour connected at one point to the USB shield ground. Decouple VDD with 100 nF X7R 0402 close to each VDD pin (pins 19 and 20), and add a 4.7 µF X5R 0805 bulk capacitor within 5 mm. Keep the ferrite bead between VUSB and VDD short; if removed, the internal regulator feeds the digital VDD directly and increases noise on the analog AV rails.
合規資訊
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - select PIC18F14K50 (no AEC variant available either) or move to PIC16F series for automotive-grade USB solutions. Lead-free (Pb-free), halogen-free MSL1.
