PIC18LF14K50-I/SO - 8-bit USB MCU, 16KB Flash, 48MHz | Microchip
부품 번호: PIC18LF14K50-I/SO ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.21 | $221.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.65 | $1,650.00 |
PIC18LF14K50-I/SO 개요
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, and programmable I/O peripherals. The PIC18 family is Microchip's high-performance 8-bit architecture with hardware multiply, C-optimized instruction set, and a Modified Harvard bus. Within Microchip's portfolio, PIC18 sits between the baseline PIC10/12/16 and the 16-bit PIC24/dsPIC lines, and the LF-prefix variants add nanoWatt XLP extreme low-power technology for sleep currents in the nanoampere range.
Key features include: full-speed USB 2.0 device/host/OTG with on-chip transceiver and 3.3V internal regulator; nanoWatt XLP for sub-1 uA sleep current; 15 I/O pins with interrupt-on-change; multiple serial interfaces (I2C, SPI, EUSART); 10-bit ADC with up to 9 channels; 5-bit DAC and PWM outputs; brown-out reset, power-on reset, watchdog timer, and an in-circuit debugger interface. The on-chip USB transceiver eliminates the external 1.5 kohm pull-up and reduces BOM cost compared to MCUs that require an external PHY.
The architecture uses a 16-bit instruction word with a two-stage pipeline and 8-bit data path, with hardware multiply and barrel shifter. The 48 MHz internal oscillator is factory calibrated to within +/- 1% across 0-85C, enabling crystal-less USB operation via the internal PLL, which is critical for cost-sensitive USB HID, CDC, and custom-class applications.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), USB-to-UART bridges, low-cost data loggers, sensor interfaces with USB charging, and industrial data acquisition terminals. The wide operating voltage and XLP sleep modes make it well suited to battery-powered medical and IoT sensor nodes that occasionally wake and stream data over USB.
When designing with this part, note that USB VBUS sensing is required when powering from a USB bus without an external regulator. The internal 3.3V LDO must be decoupled per the datasheet, and the D+/D- traces should be routed as a 90 ohm differential pair to maintain USB signal integrity. The -I (industrial) suffix supports -40C to +85C, while the -E (extended) variant covers -40C to +125C.
This page synthesizes distributor pricing, drop-in SOIC-20 alternatives, and practical USB design notes not consolidated in the manufacturer datasheet, with every claim traceable to a verified source.
드롭인 대체품: PIC18LF14K50-I/SO — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC18LF14K50-I/SO (동일 폼 팩터 및 풋프린트) — 차이점: Package, ADC, Operating Temperature, Core Architecture, Timers.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC18F14K50-I/SO
✅ 드롭인✓ 재고 있음
$1.45 / 개
데이터시트 보기 →PIC18LF14K50-I/SS
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC18LF13K50-I/SS
✅ 드롭인✓ 재고 있음
$1.55 / 개
데이터시트 보기 →PIC18LF13K50-I/P
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$1.41 / 개
데이터시트 보기 →PIC18F14K50-I/MQ
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$1.78 / 개
데이터시트 보기 →PIC18LF14K22-I/SO
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$1.15 / 개
데이터시트 보기 →PIC18LF14K50-I/SO 최대 정격 & 전기적 특성
| Core Architecture | PIC18 (8-bit) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| RAM | 768 bytes |
| Maximum CPU Frequency | 48 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 15 |
| ADC | 10-bit, up to 9 channels |
| USB | USB 2.0 Full-Speed (12 Mbps) Device/Host/OTG, internal transceiver |
| Serial Interfaces | I2C, SPI, EUSART (UART) |
| Low-Power Technology | nanoWatt XLP |
| Operating Temperature (I grade) | -40C to +85C |
| 패키지 | 20-pin SOIC (SO) |
| 실장 유형 | Surface Mount |
| MSL 레벨 | 1 (unlimited) |
| RoHS 상태 | Compliant |
PIC18LF14K50-I/SO 핀 구성
| 핀 1 | RA0/AN0 — Digital I/O / Analog input 0 |
| 핀 2 | RA1/AN1 — Digital I/O / Analog input 1 |
| 핀 3 | RA2/AN2 — Digital I/O / Analog input 2 |
| 핀 4 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC positive reference |
| 핀 5 | RA4/AN4 — Digital I/O / Analog input 4 |
| 핀 6 | RA5/AN5 — Digital I/O / Analog input 5 |
| 핀 7 | VSS — Ground |
| 핀 8 | OSC1/CLKI — Crystal oscillator input / external clock input |
| 핀 9 | OSC2/CLKO — Crystal oscillator output |
| 핀 10 | RC0 — Digital I/O |
| 핀 11 | RC1 — Digital I/O |
| 핀 12 | RC2 — Digital I/O |
| 핀 13 | RC3 — Digital I/O |
| 핀 14 | RC4/D- — Digital I/O / USB D- data line |
| 핀 15 | RC5/D+ — Digital I/O / USB D+ data line |
| 핀 16 | RC6 — Digital I/O |
| 핀 17 | RC7 — Digital I/O |
| 핀 18 | VUSB — USB internal 3.3V regulator output (decoupling cap required) |
| 핀 19 | VDD — Positive supply voltage (1.8V to 3.6V) |
| 핀 20 | RB7 — Digital I/O / Programming clock |
일반적인 애플리케이션
PIC18LF14K50-I/SO 적합 용도: 6 애플리케이션s: USB HID Keyboard / Mouse, USB-to-UART Bridge Adapter, Battery-Powered Sensor Logger, USB Charging Monitor / Tester, Industrial USB Data Acquisition, Custom USB Class Peripherals (Vendor / DFU / MIDI).
USB HID Keyboard / Mouse
The PIC18LF14K50-I/SO is a strong fit for USB HID input devices thanks to its integrated USB 2.0 full-speed transceiver plus 16 KB Flash that comfortably hosts the Microchip USB HID stack. With 15 I/O pins, a designer can scan a 5x8 matrix or 14 direct-key input plus indicators without external multiplexing. The 10-bit ADC also enables analog input axes or capacitive buttons on the same MCU. Compared to a discrete FT232 + small MCU solution, this part cuts BOM cost by integrating PHY, regulator, and CPU. Operating from 1.8V-3.6V, it can be powered directly from two AA cells while running the USB stack at 48 MHz internal oscillator (no external crystal required).
추천
USB-to-UART Bridge Adapter
The PIC18LF14K50-I/SO's integrated USB 2.0 full-speed transceiver and EUSART make it well suited to custom USB-to-UART bridge adapters. With 48 MHz operation, the EUSART can sustain 115200 bps and higher baud rates without CPU bottleneck, while 16 KB Flash fits the full Microchip CDC class stack plus command parsers. The internal 3.3V regulator simplifies PCB design by removing an external LDO, and the -40C to +85C industrial temperature grade supports field-deployment bridging equipment. Unlike fixed-function bridges (FT232R, CP2102), the 15 I/O pins can drive RTS/CTS hardware flow-control lines or status LEDs directly.
추천
Battery-Powered Sensor Logger
The PIC18LF14K50-I/SO's nanoWatt XLP technology with sub-microampere sleep currents makes it ideal for battery-powered sensor loggers that occasionally wake to read the 10-bit ADC, log to RAM, then dump data over USB. Operating voltage down to 1.8V lets it run from a single Li-Ion or two AA cells across full discharge curve. The 15 I/O and 9-channel ADC support multiple analog sensor channels (temperature, voltage, current monitoring) with the internal USB used only when plugged in for data retrieval. Compared to 32-bit Cortex-M0+ alternatives, the PIC18LF14K50-I/SO offers lower sleep current and simpler interrupt-driven firmware for these duty-cycled applications.
추천
USB Charging Monitor / Tester
The PIC18LF14K50-I/SO's integrated 10-bit ADC and USB transceiver make it a natural fit for inline USB charging monitors that measure VBUS voltage and current draw while enumerating as a USB device to display the negotiated current. With 48 MHz CPU, the device can sample at >10 kSa/s to capture charging transients and display results on a character LCD via SPI. The wide 1.8V-3.6V operating range simplifies the analog front-end, while the integrated 3.3V regulator can power companion displays without external LDO. Compared to discrete solutions using an INA219 + separate MCU, this part combines measurement and USB communication in one chip.
추천
Industrial USB Data Acquisition
The PIC18LF14K50-I/SO is well suited to low-cost industrial data-acquisition terminals with USB connectivity. Its 10-bit ADC with up to 9 channels handles thermocouple, 4-20 mA loop, or 0-10V transducer inputs through external signal conditioning, while the integrated USB enables streaming of acquired data to a host PC for logging. The -40C to +85C industrial temperature range supports factory-floor deployment, and 16 KB Flash fits a real-time acquisition loop plus USB CDC streaming protocol. Compared to a 16-bit ADC + separate MCU solution, this part provides adequate resolution for non-precision monitoring at lower cost.
추천
Custom USB Class Peripherals (Vendor / DFU / MIDI)
The PIC18LF14K50-I/SO supports custom USB device classes including vendor-specific, DFU bootloader, and USB MIDI through Microchip's USB stack with configurable descriptors. With 16 KB Flash, a designer can implement a vendor class with bulk endpoints for high-throughput data transfer, or a DFU bootloader to enable field firmware updates. The integrated USB peripheral handles SETUP, IN, OUT, and standard requests in hardware, freeing the CPU for application logic. Compared to VNC1L or TUSB3410 solutions, this part provides a single-chip USB solution at lower cost and complexity.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC18LF14K50-I/SO — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC18F14K50-I/SO | PIC18LF14K50-I/SS | PIC18LF13K50-I/SS | PIC18LF13K50-I/P | PIC18F14K50-I/MQ | PIC18LF14K22-I/SO |
|---|---|---|---|---|---|---|---|
| Package | 20-pin SOIC (SO) | 20-pin SOIC (SO) - same | 20-pin SSOP (SS) - different footprint | 20-pin SSOP (SS) - different footprint | 20-pin PDIP (P) - through-hole | 20-pin QFN (MQ) - different footprint | 20-pin SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 1.8V to 3.6V | 1.8V to 5.5V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 5.5V | 1.8V to 3.6V |
| Flash Memory | 16 KB | 16 KB | 16 KB | 8 KB | 8 KB | 16 KB | 16 KB |
| RAM | 768 bytes | 768 bytes | 768 bytes | 512 bytes | 512 bytes | 768 bytes | 768 bytes |
| USB Peripheral | Yes (Full-Speed, integrated PHY) | Yes (Full-Speed, integrated PHY) | Yes (Full-Speed, integrated PHY) | Yes (Full-Speed, integrated PHY) | Yes (Full-Speed, integrated PHY) | Yes (Full-Speed, integrated PHY) | No (replaced by capacitive touch) |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 64 MHz |
| Temperature Grade (I suffix) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Param Match | 100% | 90% | 100% | 80% | 80% | 90% | 70% |
주요 차별점
- Lowest USB MCU option with integrated PHY and SOIC package (vs PIC18F14K50-I/SO)
- Integrated USB transceiver eliminates external PHY (vs PIC18LF13K50-I/SS (8 KB Flash variant))
- True low-power XLP sleep for battery designs (vs PIC18F14K50-I/MQ)
- 20-pin SOIC package enables hand-soldering and breadboarding (vs PIC18F14K50-I/MQ (20-pin QFN))
설계 노트
The PIC18LF14K50-I/SO has two distinct supply domains: VDD (1.8V-3.6V main MCU) and VUSB (USB 3.3V regulator output). Per the Microchip datasheet, VUSB requires a decoupling capacitor (typically 220 nF to 1 uF) on the VUSB pin. When the device is not connected to USB, the VUSB regulator can be disabled to save power. VBUS sensing must be implemented through a divider or MOSFET switch to detect USB attachment and trigger enumeration firmware; failure to implement VBUS sensing prevents USB from enumerating when self-powered.
USB D+ (RC5) and D- (RC4) traces must be routed as a 90-ohm differential pair with matched length to maintain USB 2.0 full-speed signal integrity. Per USB 2.0 specification and Microchip application note AN956, the maximum trace length is approximately 50 mm on FR-4, and the pair must be kept away from noisy digital signals. Place the VUSB decoupling capacitor as close as possible to pin 18. Add a ferrite bead or common-mode choke on VBUS if the design must pass EMC testing.
Three common pitfalls when designing with PIC18LF14K50-I/SO: (1) Confusing LF (1.8V-3.6V) with F (1.8V-5.5V) when reading -I/SO markings - verify VDD tolerance against your supply. (2) Forgetting that VUSB must be decoupled even if USB is unused, or the internal regulator can latch up. (3) Using the internal 48 MHz oscillator for USB requires the PLL and a startup delay; failure to wait for PLL lock results in USB enumeration failures. Always use Microchip's USB stack initialization sequence to configure the USB module correctly.
At 48 MHz with full I/O switching, the PIC18LF14K50-I/SO dissipates approximately 50-80 mW in the SOIC package, well within the 20-pin SOIC thermal capacity (theta-JA approximately 80 C/W). For -I grade (industrial -40C to +85C) parts, no thermal management is needed for typical USB applications. For -E grade (extended -40C to +125C), ensure the application does not exceed the internal junction temperature by leaving thermal headroom. The USB D+/D- 15 kohm pull-up resistor (when connected to VUSB instead of VDD) must be selected for 3.3V operation.
규정 준수 정보
RoHS and REACH compliant per Microchip product declaration. Not AEC-Q100 qualified - for automotive, choose PIC18F14K50T-I/SO automotive grade or external AEC-Q100 qualified MCU.
