PIC18LF14K50-I/P - 8-Bit 48MHz USB MCU 16KB Flash | Microchip
Référence : PIC18LF14K50-I/P ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $3.75 | $3,75 |
| 10 | $3.38 | $33,80 |
| 100 | $2.96 | $296,00 |
| 500 | $2.62 | $1 310,00 |
| 1 000 | $2.3 | $2 300,00 |
PIC18LF14K50-I/P Présentation
What is a PIC18 microcontroller? A PIC18 microcontroller is an 8-bit RISC MCU from Microchip's PIC family, offering enhanced peripherals and a Harvard architecture. Microcontrollers are programmable ICs that integrate CPU, memory, and peripherals into a single chip, sitting within the embedded computing hierarchy. USB-capable MCUs add a dedicated serial interface engine to handle USB protocol framing in hardware, freeing the CPU for application code.
Key features include 16KB Flash program memory, 768 bytes SRAM, 256 bytes EEPROM, 15 digital I/O pins, a 10-bit ADC with up to 9 channels, 2 analog comparators, enhanced CCP, and the integrated USB 2.0 full-speed transceiver. The XLP nanoWatt technology enables standby currents as low as nA, making it ideal for battery-powered designs. Wide operating voltage spans 1.8V to 3.6V (LF variant).
The architecture pairs a RISC CPU core with hardware USB, eliminating external PHY requirements. Internal oscillator options, including the 31kHz to 16MHz HFINTOSC and 31kHz LFINTOSC, support USB clocking from the internal 48MHz source. Self-programmability via ICSP and CTMU for capacitive touch round out the peripheral set.
Typical applications include USB-to-UART bridges, HID peripherals (keyboards/mouse/joysticks), low-cost USB sensor dongles, USB chargers and portable data loggers. Designers favor this part for its compact 20-pin footprint, integrated USB, and Microchip's free MPLAB X toolchain.
Design consideration: USB requires precise 48MHz clocking; for low-power sleep modes the LF variant (1.8V min) is essential. Decouple VDD with 100nF ceramic near each VDD pin and route D+/D- as a 90-ohm differential pair.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet, providing engineering value beyond what Microchip's PDF offers.
Alternatives de remplacement direct pour PIC18LF14K50-I/P — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC18LF14K50-I/P (même facteur de forme et même empreinte) — différant par ADC, I/O Pins, Mounting Type, Operating Voltage Range, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F14K50-I/P
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18LF14K50-I/SO
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.65 / unité
Voir la fiche technique →PIC18LF14K50-I/ML
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC18LF13K50-I/P
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.41 / unité
Voir la fiche technique →PIC18LF14K22-I/P
✅ Remplacement direct✓ En stock
$1.62 / unité
Voir la fiche technique →PIC18F13K50-I/P
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18LF14K50-I/P Valeurs maximales et caractéristiques électriques
| Core | PIC18 (8-bit RISC) |
| Series | PIC XLP 18K |
| Program Memory | 16 KB Flash (8K x 16) |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 48 MHz (16 MIPS) |
| Tension d'alimentation | 1.8 V to 3.6 V |
| I/O Pins | 15 |
| ADC | 10-bit, 9 channels |
| Comparators | 2 |
| USB | USB 2.0 Full-Speed (12 Mbps), integrated transceiver |
| Timers | 1x 8-bit, 3x 16-bit |
| PWM Channels | 1 (Enhanced CCP) |
| Boîtier | 20-pin PDIP (0.300 in, 7.62 mm) |
| Type de montage | Through-Hole |
| Température de fonctionnement | -40C to +85C (Industrial) |
| Statut RoHS | Compliant |
| Niveau MSL | Not Applicable (Through-Hole) |
Configuration des broches de PIC18LF14K50-I/P
| Broche 1 | RA3/AN3/VREF+ — GPIO/Analog input 3/ADC positive reference |
| Broche 2 | RA4/AN4 — GPIO/Analog input 4 |
| Broche 3 | RA5/MCLR/VPP — GPIO/Master Clear (reset, active low)/Programming voltage |
| Broche 4 | RA0/AN0/ULPWU — GPIO/Analog input 0/Ultra-Low-Power Wake-up |
| Broche 5 | RA1/AN1 — GPIO/Analog input 1 |
| Broche 6 | RA2/AN2/VREF- — GPIO/Analog input 2/ADC negative reference |
| Broche 7 | VDD — Positive supply voltage (1.8V-3.6V) |
| Broche 8 | VSS — Ground reference |
| Broche 9 | RB7/ICSPDAT — GPIO/ICSP data |
| Broche 10 | RB6/ICSPCLK — GPIO/ICSP clock |
| Broche 11 | RB5/AN11 — GPIO/Analog input 11 |
| Broche 12 | RB4/AN10 — GPIO/Analog input 10 |
| Broche 13 | RC2/AN8 — GPIO/Analog input 8 |
| Broche 14 | RC3/AN9 — GPIO/Analog input 9 |
| Broche 15 | RC4/AN6 — GPIO/Analog input 6 |
| Broche 16 | RC5/AN7/D+ — GPIO/Analog input 7/USB D+ data line |
| Broche 17 | RC6/AN8/D- — GPIO/Analog input 8/USB D- data line |
| Broche 18 | RC7/AN9 — GPIO/Analog input 9 |
| Broche 19 | VSS — Ground reference |
| Broche 20 | VDD — Positive supply voltage (1.8V-3.6V) |
Applications typiques
PIC18LF14K50-I/P convient pour 6 applications: USB-to-UART Bridge, USB HID Peripheral, Portable USB Sensor Dongle, USB Charger / Power Bank Controller, USB Firmware Update Dongle (Bootloader Host), Educational / Hobby USB Development.
USB-to-UART Bridge
The PIC18LF14K50-I/P is well-suited for USB-to-UART bridge dongles because it integrates a USB 2.0 full-speed transceiver and an EUSART (enhanced USART) on the same 20-pin PDIP die, eliminating the need for an external PHY or USB-to-serial IC. Its 16KB Flash holds CDC-class firmware plus optional bootloaders, while 768 bytes SRAM handles USB endpoint buffers and UART FIFOs. Operating from 1.8V-3.6V makes it ideal for 3.3V logic bridging. The device supports USB bus-powered designs with internal 3.3V regulator off VBUS, achieving sub-100mA operation typical of CDC ACM profile devices used in firmware debug consoles and embedded debug ports.
Recommandé
USB HID Peripheral
For USB HID devices such as keyboards, mice, barcode scanners, or game controllers, the PIC18LF14K50-I/P delivers 15 GPIO pins sufficient for scanned key matrices and LED status, plus the integrated USB transceiver that handles HID interrupt transfers in hardware. The 48MHz core (16 MIPS) supports polling rates up to 1000Hz at minimal CPU load. nanoWatt XLP technology enables battery-powered wireless HID dongles drawing microamps in sleep. The 10-bit ADC can read potentiometers or analog joysticks without external converters. With 16KB Flash and USB stack under 4KB, ample room remains for application-specific HID report descriptors and consumer-control logic.
Recommandé
Portable USB Sensor Dongle
Battery-powered USB sensor dongles (temperature loggers, environmental monitors, portable diagnostics) leverage the PIC18LF14K50-I/P's nanoWatt XLP technology for sub-microamp standby, extending coin-cell life to months. The integrated 10-bit ADC with 9 channels accepts multiple analog sensors directly, while the 256-byte EEPROM stores calibration constants. USB bus-powered mode charges a small Li-ion or LiPo cell through an external boost regulator, with the PIC monitoring battery voltage via ADC. The wide 1.8V-3.6V range accommodates direct Li-ion operation without level shifters, and the 20-pin PDIP allows hand-soldered prototyping for low-volume test instruments and educational kits.
Recommandé
USB Charger / Power Bank Controller
The PIC18LF14K50-I/P functions as a USB charger controller or low-cost power bank management MCU, leveraging USB for status reporting (battery voltage, charge current, temperature) to a host application. The 15 GPIO pins drive status LEDs, button input, and FET gate control for load switching and charging paths. ADC channels measure battery voltage, current sense, and thermistor temperature for safety cutoff. The integrated USB enables enumeration as a custom HID or CDC device displaying battery telemetry, while nanoWatt XLP keeps quiescent draw below 50uA in standby. 16KB Flash holds state-machine firmware for CC/CV charging profiles and protection logic.
Recommandé
USB Firmware Update Dongle (Bootloader Host)
In factory or field-update scenarios, the PIC18LF14K50-I/P acts as a USB-hosted bootloader programmer, presenting itself as a mass storage or HID device that streams new firmware to a target MCU via SPI, I2C, or UART. The 16KB Flash supports both USB stack and bootloader logic, while 768 bytes SRAM buffers firmware pages. Programmable code protection prevents read-back of sensitive firmware. The 48MHz CPU throughput handles USB bulk transfers at 12Mbps without bottlenecking SPI flash programming rates. Industrial -40C to +85C rating supports automotive and industrial update stations, and ICSP enables concurrent target programming while USB is active.
Recommandé
Educational / Hobby USB Development
The PIC18LF14K50-I/P's 20-pin PDIP through-hole package and free MPLAB X / XC8 toolchain make it ideal for university embedded systems courses and hobbyist USB learning projects. Students can breadboard the part without surface-mount soldering challenges, while still accessing real USB enumeration, CDC, and HID examples. The 48MHz MIPS core introduces assembly-level concepts, and 16KB Flash holds substantial C code for projects ranging from USB volumeters to MIDI controllers. The PIC18 architecture is well-documented in textbooks and supported by decades of Microchip application notes, accelerating onboarding for first-time embedded developers.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LF14K50-I/P — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F14K50-I/P | PIC18LF14K50-I/SO | PIC18LF14K50-I/ML | PIC18LF13K50-I/P | PIC18LF14K22-I/P | PIC18F13K50-I/P |
|---|---|---|---|---|---|---|---|
| Package | 20-pin PDIP (0.300 in) | 20-pin PDIP - same | 20-pin SOIC | 20-pin QFN | 20-pin PDIP - same | 20-pin PDIP - same | 20-pin PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 16 KB Flash | 16 KB Flash | 16 KB Flash | 16 KB Flash | 8 KB Flash (-50%) | 16 KB Flash | 8 KB Flash (-50%) |
| RAM | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 512 bytes (-33%) | 768 bytes | 512 bytes (-33%) |
| Supply Voltage | 1.8V to 3.6V | 1.8V to 5.5V (wider) | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 5.5V (wider) |
| Integrated USB | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | No | Yes (USB 2.0 FS) |
| Maximum CPU Speed | 48 MHz / 16 MIPS | 48 MHz / 16 MIPS | 48 MHz / 16 MIPS | 48 MHz / 16 MIPS | 48 MHz / 16 MIPS | 64 MHz / 16 MIPS | 48 MHz / 16 MIPS |
| ADC | 10-bit, 9 ch | 10-bit, 9 ch | 10-bit, 9 ch | 10-bit, 9 ch | 10-bit | 10-bit, 7 ch | 10-bit |
| I/O Pins | 15 | 15 | 15 | 15 | 15 | 17 | 15 |
| Lifecycle Status | Active | Active | Active | Active | Active | Active | Active |
Principaux différenciateurs
- Integrated USB 2.0 full-speed transceiver eliminates external PHY (vs PIC18LF14K22-I/P)
- Wider supply voltage range for 5V-tolerant designs (vs PIC18F14K50-I/P)
- 50% larger Flash for USB stack + application code (vs PIC18LF13K50-I/P)
Notes de conception
USB bus-powered designs must use a 3.3V LDO (e.g., MCP1700) from VBUS because the PIC18LF14K50-I/P operates from 1.8V-3.6V. Place 100nF ceramic decoupling on each VDD/VSS pair (pins 7/8 and 19/20). For self-powered USB devices, add a 10k pull-up on D+ through a GPIO to control enumeration per USB 2.0 specification. Estimate current consumption: active 48MHz core ~10mA, idle ~2mA, sleep with USB detached ~1uA in XLP mode.
Route the USB D+ and D- lines as a 90-ohm differential pair on the top layer, keeping them short (under 50mm) and matched within 0.5mm. Place 27-ohm series termination resistors near the MCU pins on each data line. Add ESD protection (e.g., USBLC6-2SC6) close to the USB connector. Keep digital switching signals away from the differential pair to meet USB signal-integrity and EMI requirements.
Do not confuse the LF and F variants: PIC18LF14K50-I/P tops out at 3.6V while PIC18F14K50-I/P supports 5.5V. Exceeding 3.6V on the LF part causes permanent damage. Also note that pins 16 and 17 are dual-function D+/D- on this family; if USB is unused, configure them as digital GPIO. The MCLR pin (pin 3) requires a 10k pull-up to VDD for normal operation; without it the part stays in reset.
USB 2.0 full-speed signaling requires the 48MHz clock source to have +/- 0.25% accuracy. The internal HFINTOSC is factory-calibrated to this tolerance, but adding a 27-ohm resistor in series with the USB clock output improves edge symmetry. Decouple the internal 48MHz PLL by ensuring low-impedance VDD during enumeration bursts; add 1uF bulk capacitance on VDD near pin 7.
Informations de conformité
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; the part targets industrial/commercial -40C to +85C range, not automotive. Halogen-free status not stated in available web data.
