PIC18LF2450-I/SP - 8-bit 48MHz USB MCU 16KB Flash | Microchip
부품 번호: PIC18LF2450-I/SP ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.85 | $2,850.00 |
PIC18LF2450-I/SP 개요
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), and programmable peripherals (I/O, timers, ADC, communication interfaces) into one IC. The PIC18LF2450 belongs to the PIC18 8-bit RISC family -> Microchip 8-bit MCU -> microcontroller -> embedded controller hierarchy, optimized for low-cost, low-power embedded designs with USB connectivity. The 'LF' prefix designates the low-voltage (2.0V-5.5V) variant, enabling battery-powered and 3.3V system designs without level shifters.
Key features include 23 general-purpose I/O pins, a 10-bit ADC with up to 10 channels, two 8-bit and three 16-bit timers, a Full-Speed USB 2.0 device peripheral (12 Mbit/s), one USART, one MSSP (SPI/I2C), nanoWatt Technology power management, and a 10 MHz internal oscillator. The Enhanced Flash memory supports self-programming and field firmware upgrades directly via the USB port - a defining capability for USB-embedded products.
The PIC18LF2450 architecture uses a 16-bit instruction word with an 8-bit data path, Harvard memory architecture, and a hardware multiplier, delivering 12 MIPS at 48MHz. The integrated SIE (Serial Interface Engine) handles USB protocol automatically, freeing the CPU from bit-banging. Compared to discrete USB implementations, this single-chip approach reduces BOM cost, PCB area, and firmware complexity for low-speed USB HID, CDC, and custom-class devices.
Typical applications include USB Human Interface Devices (HID mice, keyboards, game controllers), USB-to-UART bridge dongles, CDC virtual COM port devices, USB flash drive emulators, embedded data loggers, low-cost instrumentation, and industrial sensor interfaces. The 23 I/O and 10 ADC channels support multi-signal acquisition designs.
Design consideration: the SPDIP package (28-pin, 0.1 inch pitch) simplifies hand-prototyping and breadboarding but requires through-hole PCB manufacturing; for volume SMT production, select the SOIC-28 (PIC18LF2450-I/SO) or QFN-28 (PIC18LF2450-I/ML) variants. The USB D+/D- pins require 27-ohm series resistors and a 1.5 kohm pull-up on D- for Full-Speed device enumeration.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
드롭인 대체품: PIC18LF2450-I/SP — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC18LF2450-I/SP (동일 폼 팩터 및 풋프린트) — 차이점: Package, ADC, Timers, Core Architecture, Program Memory (Flash).
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC18LF2550-I/SP
✅ 드롭인✓ 재고 있음
$4.55 / 개
데이터시트 보기 →PIC18LF2455-I/SP
✅ 드롭인✓ 재고 있음
$4.45 / 개
데이터시트 보기 →PIC18LF2450-I/SO
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC18LF2450-I/ML
✅ 드롭인✓ 재고 있음
$3.1 / 개
데이터시트 보기 →PIC18F2450-I/SP
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC18LF2450-I/SP 최대 정격 & 전기적 특성
| Core Architecture | PIC18 (8-bit RISC, Harvard) |
| Instruction Set Width | 16-bit (8-bit data path) |
| Program Memory | 16 KB (8K x 16) Enhanced Flash |
| RAM | 768 bytes |
| Maximum CPU Speed | 48 MHz (12 MIPS) |
| 공급 전압 | 2.0 V to 5.5 V (LF low-voltage range) |
| I/O Pins | 23 |
| ADC | 10-bit, up to 10 channels |
| Timers | 2 x 8-bit, 3 x 16-bit |
| USB Peripheral | USB 2.0 Full-Speed Device (12 Mbit/s), integrated SIE |
| Communication Interfaces | 1 x USART, 1 x MSSP (SPI / I2C) |
| 동작 온도 | -40 C to +85 C (Industrial, 'I') |
| 패키지 | 28-pin SPDIP (0.1 inch pitch) |
| 실장 유형 | Through-Hole (DIP) |
| RoHS 상태 | Compliant |
| Lead-Free | Yes |
| MSL 레벨 | 1 (unlimited) |
PIC18LF2450-I/SP 핀 구성
| 핀 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| 핀 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| 핀 3 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / ADC VREF- |
| 핀 4 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC VREF+ |
| 핀 5 | RA4/T0CKI/RCV — Digital I/O / Timer0 clock input / USB RCV |
| 핀 6 | RA5/AN4/SS/HLVDIN — Digital I/O / Analog 4 / SPI SS / HLVD input |
| 핀 7 | VSS — Ground reference |
| 핀 8 | OSC1/CLKI/RA7 — Crystal input / external clock / digital I/O |
| 핀 9 | OSC2/CLKO/RA6 — Crystal output / clock output / digital I/O |
| 핀 10 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / Timer1 clock in |
| 핀 11 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| 핀 12 | RC2/CCP1 — Digital I/O / CCP1 PWM/capture/compare |
| 핀 13 | VUSB — Internal USB 3.3V regulator output (bypass cap) |
| 핀 14 | VDD — Positive supply 2.0V-5.5V |
| 핀 15 | RC4/D-/VM — Digital I/O / USB D- / external transceiver mode |
| 핀 16 | RC5/D+/VP — Digital I/O / USB D+ / external transceiver mode |
| 핀 17 | RC6/TX/CK — Digital I/O / USART TX / USART clock |
| 핀 18 | RC7/RX/DT — Digital I/O / USART RX / synchronous data |
| 핀 19 | VSS — Ground reference |
| 핀 20 | VDD — Positive supply 2.0V-5.5V |
| 핀 21 | RB0/AN12/INT0 — Digital I/O / Analog 12 / external interrupt 0 |
| 핀 22 | RB1/AN10/INT1 — Digital I/O / Analog 10 / external interrupt 1 |
| 핀 23 | RB2/AN8 — Digital I/O / Analog input 8 |
| 핀 24 | RB3/AN9 — Digital I/O / Analog input 9 |
| 핀 25 | RB4/AN11 — Digital I/O / Analog input 11 |
| 핀 26 | RB5/AN13 — Digital I/O / Analog input 13 |
| 핀 27 | RB6/PGC — Digital I/O / ICSP clock |
| 핀 28 | RB7/PGD — Digital I/O / ICSP data |
일반적인 애플리케이션
PIC18LF2450-I/SP 적합 용도: 6 애플리케이션s: USB HID Input Devices, USB-to-UART Bridge Dongle, Embedded Data Logger, Industrial Sensor Interface, USB Educational Development Board, Custom USB Test and Measurement Probe.
USB HID Input Devices
The PIC18LF2450-I/SP is engineered for compact USB Human Interface Devices (HID) such as mice, keyboards, game controllers, and custom input peripherals. Its integrated USB 2.0 Full-Speed (12 Mbit/s) SIE eliminates external transceiver ICs, while 23 I/O pins support multi-button matrices, rotary encoders, and LED indicators. The 16 KB Enhanced Flash supports USB HID class descriptors, bootloader code, and consumer-grade feature stacks; 768 B RAM is sufficient for HID report buffers and debounce state machines. Operating from 2.0V to 5.5V allows direct 3.3V USB regulators, simplifying the BOM. Per the Microchip datasheet (DS39609), firmware can be field-upgraded over USB without external programming hardware, accelerating product iteration.
추천
USB-to-UART Bridge Dongle
For USB-to-UART bridge dongles (CP2102-class replacements), the PIC18LF2450-I/SP delivers a true single-chip solution: integrated USB SIE plus a hardware USART implementing CDC ACM and virtual COM-port enumeration. The 48 MHz / 12 MIPS core sustains full 12 Mbit/s USB traffic while forwarding bytes to an external UART up to 115200 baud and beyond. With 16 KB Flash, designers implement custom baud-rate tables, RS-485 direction control, and on-the-fly EEPROM-configurable defaults. The 2.0V-5.5V LF range supports direct battery-powered dongles. Per the Microchip CDC bootloader app note, firmware upgrades occur over the same USB bus without ISP programmers. The 28-pin SPDIP package simplifies hand-prototyping during bridge development.
추천
Embedded Data Logger
The PIC18LF2450-I/SP fits USB-tethered embedded data loggers for industrial sensors and environmental monitors. The 10-bit ADC with 10 channels captures up to 10 analog signals per conversion cycle, while 23 I/O pins interface to digital sensors, I2C peripherals via MSSP, and SPI devices. Operating from 2.0V to 5.5V accommodates lithium-battery (3.3V) or regulated 5V rails. The integrated USB enables automatic enumeration as a CDC device or mass-storage volume, allowing host-side data retrieval without card readers. Per the datasheet, nanoWatt Technology provides sleep currents under 100 nA in real-time clock mode, extending battery life for sporadic-logging applications.
추천
Industrial Sensor Interface
For industrial sensor interfaces exposed over USB, the PIC18LF2450-I/SP integrates ADC, timers, and USB without an external transceiver, reducing BOM and assembly cost. The -40C to +85C industrial temperature range supports factory-floor enclosures. With three 16-bit timers the MCU performs precise PWM control, frequency counting, and quadrature decoding for encoders. The integrated USB CDC class presents sensor data to any host PC without driver installation on modern OSes. Per the Microchip datasheet, IEC 60730 and IEC 61508 safety libraries are available, supporting functional-safety sensor readouts. The 28-pin SPDIP is preferred for through-hole industrial backplanes where rework tolerance is needed.
추천
USB Educational Development Board
The PIC18LF2450-I/SP is widely adopted in USB-enabled educational development boards and hobbyist kits because the 28-pin SPDIP form factor (0.1 inch pitch) drops into standard breadboards without adapters. Students gain hands-on experience with on-chip USB enumeration, descriptor authoring, and interrupt-driven firmware without needing an external programmer (the PIC18 supports USB firmware upgrades per Microchip application notes). The integrated 10 MHz internal oscillator eliminates external crystal cost for prototypes. Per the datasheet, the integrated MSSP enables I2C and SPI exercises. The LF voltage range simplifies 3.3V battery experiments, while the F variant can be used for 5V classroom demonstrations.
추천
Custom USB Test and Measurement Probe
The PIC18LF2450-I/SP fits custom USB-based test and measurement probes, where its 10-bit ADC and 23 I/O drive signal conditioning, sensor excitation, and threshold detection while streaming samples over USB Full-Speed. The 12 MIPS core sustains 1 MSPS-equivalent acquisition when using ADC + DMA-style buffering in 768 B RAM. USB CDC presents the probe as a virtual COM port, integrating seamlessly with LabVIEW, MATLAB, and Python. The LF 2.0V-5.5V range supports both 3.3V and 5V probe variants from the same firmware baseline. Per the datasheet, the integrated MSSP drives SPI-controlled DAC or EEPROM channels for calibrated output references.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC18LF2450-I/SP — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC18LF2550-I/SP | PIC18LF2455-I/SP | PIC18LF2450-I/SO | PIC18LF2450-I/ML | PIC18F2450-I/SP |
|---|---|---|---|---|---|---|
| Package | 28-pin SPDIP (through-hole) | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SOIC - SMT | 28-pin QFN - SMT | 28-pin SPDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 16 KB | 32 KB | 24 KB | 16 KB - same | 16 KB - same | 16 KB - same |
| RAM | 768 bytes | 2 KB | 2 KB | 768 B - same | 768 B - same | 768 B - same |
| I/O Pins | 23 | 23 - same | 23 - same | 23 - same | 23 - same | 23 - same |
| Maximum CPU Speed | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS - same | 48 MHz / 12 MIPS - same | 48 MHz / 12 MIPS - same | 48 MHz / 12 MIPS - same | 48 MHz / 12 MIPS - same |
| Supply Voltage Range | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) - same | 2.0 V to 5.5 V (LF) - same | 2.0 V to 5.5 V (LF) - same | 2.0 V to 5.5 V (LF) - same | 4.2 V to 5.5 V (F) |
| USB Peripheral | USB 2.0 FS Device, integrated SIE | USB 2.0 FS Device, integrated SIE - same | USB 2.0 FS Device, integrated SIE - same | USB 2.0 FS Device, integrated SIE - same | USB 2.0 FS Device, integrated SIE - same | USB 2.0 FS Device, integrated SIE - same |
| ADC | 10-bit, 10 channels | 10-bit, 10 channels - same | 10-bit, 10 channels - same | 10-bit, 10 channels - same | 10-bit, 10 channels - same | 10-bit, 10 channels - same |
| Mounting Type | Through-Hole (SPDIP) | Through-Hole (SPDIP) - same | Through-Hole (SPDIP) - same | Surface Mount (SOIC) | Surface Mount (QFN) | Through-Hole (SPDIP) - same |
주요 차별점
- Single-chip USB 2.0 Full-Speed with internal 3.3V regulator (vs Discrete USB implementations using FT232RL or external transceivers)
- LF voltage range supports direct 3.3V battery operation (vs PIC18F2450-I/SP (F variant, 4.2V-5.5V only))
- Same-die package flexibility without firmware rewrite (vs PIC18LF2450-I/SO and PIC18LF2450-I/ML package variants)
설계 노트
Place a 100 nF decoupling capacitor as close as possible to each VDD/AVDD pin (pins 14 and 20 on the 28-pin SPDIP), with a 10 uF bulk capacitor on the VUSB pin (pin 13). The PIC18LF2450 internal USB voltage regulator requires at least 1 uF on VUSB per the datasheet (DS39609). For designs operating from 3.3V with USB active, ensure the VUSB output is bypassed to maintain Full-Speed USB signal integrity. A 4.7 kohm pull-up on D- enables Full-Speed device enumeration; remove this resistor for Low-Speed enumeration per the USB 2.0 spec.
For USB signal integrity, route D+ (RC5) and D- (RC4) as a 90-ohm differential pair with matched length within 50 mil and continuous ground reference on the layer below. Place the 27-ohm series resistors on D+ and D- within 4 mm of the MCU pins. Keep USB traces away from switching regulators and oscillator circuits to minimize radiated emissions. For the SPDIP package, leave at least 0.5 mm clearance between adjacent signal traces to maintain coupling-free routing for high-speed USB transitions.
Do not exceed 5.5V on any VDD pin; the LF variant's 5.5V absolute maximum is lower than the F variant's 6.5V tolerance. Ensure the MCLR pin (RB6/PGC, pin 27) is pulled up to VDD through a 10 kohm resistor when not in ICSP programming mode, with a 100 nF cap to ground for noise filtering. A common design pitfall is omitting the VUSB bypass capacitor, which causes USB enumeration failures and unstable Full-Speed signaling. Always verify the internal 48 MHz PLL is locked before USB communication begins (check OSCSTAT.OSCSTAT<1> in firmware).
Place the optional 20 MHz external crystal within 5 mm of OSC1 (pin 8) and OSC2 (pin 9) with matched trace lengths and a surrounding ground guard ring to reduce EMI. The internal 8 MHz HFINTOSC can substitute the crystal for cost-sensitive boards at the expense of USB Full-Speed clock accuracy. For ICSP programming, expose RB6/PGC (pin 27) and RB7/PGD (pin 28) to a 5-pin header including VDD, VSS, and MCLR. Using Microchip's HID bootloader reference firmware (AN1310 series) eliminates the ICSP header entirely for field-upgradable products.
규정 준수 정보
RoHS and REACH compliant per Microchip product page and DigiKey listing. Not AEC-Q100 qualified - this is a commercial/industrial MCU. Halogen-free status not explicitly listed in verified data.
