PIC18LF4455T-I/PT - 8-bit 48MHz USB MCU 24KB Flash | Microchip
部品番号: PIC18LF4455T-I/PT ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $8.39 | $8.39 |
| 10 | $7.55 | $75.50 |
| 100 | $6.71 | $671.00 |
| 500 | $5.86 | $2,930.00 |
| 1,000 | $5.03 | $5,030.00 |
PIC18LF4455T-I/PT 概要
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, and programmable peripherals. The PIC18 family extends this with a 16-bit instruction word architecture optimised for deterministic, byte-oriented C code generation, sitting above baseline PIC10/PIC12/PIC16 parts in Microchip's taxonomy. The LF (Low-Voltage/Flexible) suffix denotes the extended 2.0-5.5 V supply range and ultra-low-power nanoWatt XLP technology, allowing battery-powered designs.
Key features of the PIC18LF4455T-I/PT include 24 KB self-programmable Flash with 100K erase/write cycles, an internal 8 MHz / 32 kHz oscillator block with PLL for 48 MHz operation, an integrated 5-bit DAC and 13-channel 10-bit ADC, three serial ports (FS-USB 12 Mbit/s, I2C, SPI up to 10 Mbit/s), and an asynchronous LIN-capable EUSART. Industrial temperature grade (-40C to +85C) and 35 instructions in the instruction set provide ample code density.
The device uses a Harvard RISC architecture with separate program and data buses, allowing instruction fetch and operand read in a single cycle. On-chip peripherals are mapped into the SFR space and include Comparators, PWM, Capture/Compare, and a CTMU for capacitive touch sensing. The integrated Full-Speed USB transceiver eliminates external PHY components for many HID/CDC designs.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), industrial sensor interfaces with USB diagnostics, low-power data loggers, LIN/CAN gateway nodes, and battery-powered IoT edge devices. Industrial -40C to +85C rating and 2.0-5.5 V supply make it ideal for portable and USB-powered embedded designs.
When designing with the PIC18LF4455T-I/PT, ensure that the USB D+/D- traces are routed as a 90-ohm differential pair and that VBUS sensing uses the internal 3.3V regulator output. The TQFP-44 footprint requires standard SMT reflow; no external programming voltage is needed for ICSP.
This page synthesises distributor pricing, drop-in PIC18 family alternatives, and practical design notes that complement the manufacturer datasheet.
ドロップイン代替品: PIC18LF4455T-I/PT — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC18LF4455T-I/PT （同一形状・フットプリント） — 相違点: ADC, Package, Timers, Core Architecture, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
PIC18LF4550-I/PT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PIC18LF4450T-I/PT
✅ ドロップイン✓ 在庫あり
$4.55 / 個
データシートを見る →PIC18LF4455-I/PT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PIC18LF2455T-I/ML
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC18LF2550T-I/ML
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC18LF4455T-I/PT 最大定格＆電気的特性
| Core Architecture | PIC18 8-bit RISC |
| Program Memory | 24 KB (12K x 16) Flash |
| Data Memory (SRAM) | 2048 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 48 MHz |
| Supply Voltage Range | 2.0 V to 5.5 V |
| USB Peripheral | Full-Speed USB 2.0 (12 Mbit/s) |
| ADC | 10-bit, 13 channels |
| DAC | 5-bit internal |
| Serial Interfaces | USB, I2C, SPI (up to 10 Mbit/s), EUSART (LIN-capable) |
| I/O Pins | 35 (typical) |
| Timers | 4 (16-bit Timer0/1/2/3) |
| PWM Channels | Enhanced CCP, 2 modules |
| 動作温度 | -40C to +85C (Industrial) |
| パッケージ | 44-pin TQFP (10x10 mm) |
| 実装タイプ | Surface Mount |
| Instruction Set | 35 instructions |
| Low-Power Technology | nanoWatt XLP |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
PIC18LF4455T-I/PT ピン構成
| ピン 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / digital I/O RE3 |
| ピン 2 | RA0/AN0 — PORTA bit 0 / analog input channel 0 |
| ピン 3 | RA1/AN1 — PORTA bit 1 / analog input channel 1 |
| ピン 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input channel 2 / ADC VREF- |
| ピン 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input channel 3 / ADC VREF+ |
| ピン 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| ピン 7 | RA5/AN4/SS — PORTA bit 5 / analog input channel 4 / SPI slave select |
| ピン 8 | RE0/RD — PORTE bit 0 / parallel port read control |
| ピン 9 | RE1/WR — PORTE bit 1 / parallel port write control |
| ピン 10 | RE2/CS — PORTE bit 2 / parallel port chip select |
| ピン 11 | VUSB — Internal USB 3.3V regulator output |
| ピン 12 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| ピン 13 | OSC1/CLKI — Crystal oscillator input / external clock input |
| ピン 14 | OSC2/CLKO — Crystal oscillator output / clock output |
| ピン 15 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| ピン 16 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| ピン 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM1 |
| ピン 18 | RC4/D-/VMO — PORTC bit 4 / USB D- / parallel port data |
| ピン 19 | RC5/D+/VPO — PORTC bit 5 / USB D+ / parallel port data |
| ピン 20 | RC6/TX/CK — PORTC bit 6 / EUSART TX / clock |
| ピン 21 | RC7/RX/DT — PORTC bit 7 / EUSART RX / data |
| ピン 22 | RB0/AN12 — PORTB bit 0 / analog input channel 12 |
| ピン 23 | RB1/AN10 — PORTB bit 1 / analog input channel 10 |
| ピン 24 | RB2/AN8 — PORTB bit 2 / analog input channel 8 |
| ピン 25 | RB3/AN9 — PORTB bit 3 / analog input channel 9 |
| ピン 26 | RB4/AN11 — PORTB bit 4 / analog input channel 11 |
| ピン 27 | RB5/AN13 — PORTB bit 5 / analog input channel 13 |
| ピン 28 | RB6/KB1/PGC — PORTB bit 6 / interrupt-on-change / ICSP clock |
| ピン 29 | RB7/KB2/PGD — PORTB bit 7 / interrupt-on-change / ICSP data |
| ピン 30 | RD0/SPP0 — PORTD bit 0 / streaming parallel port data |
| ピン 31 | RD1/SPP1 — PORTD bit 1 / streaming parallel port data |
| ピン 32 | RD2/SPP2 — PORTD bit 2 / streaming parallel port data |
| ピン 33 | RD3/SPP3 — PORTD bit 3 / streaming parallel port data |
| ピン 34 | RD4/SPP4 — PORTD bit 4 / streaming parallel port data |
| ピン 35 | RD5/SPP5 — PORTD bit 5 / streaming parallel port data |
| ピン 36 | RD6/SPP6 — PORTD bit 6 / streaming parallel port data |
| ピン 37 | RD7/SPP7 — PORTD bit 7 / streaming parallel port data |
| ピン 38 | VSS — Ground reference |
| ピン 39 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| ピン 40 | RA6/OSC2 — PORTA bit 6 / alternate oscillator output |
| ピン 41 | RA7/OSC1 — PORTA bit 7 / alternate oscillator input |
| ピン 42 | RC3/REF-/SCL — PORTC bit 3 / DAC VREF- / I2C clock |
| ピン 43 | RC4/D-/VMO — PORTC bit 4 (alternate) / USB D- / VPO data |
| ピン 44 | RC5/D+/VPO — PORTC bit 5 (alternate) / USB D+ / VPO data |
主な用途
PIC18LF4455T-I/PT の用途: 7 件s: USB HID Peripherals (Keyboard, Mouse, Custom Input), Industrial Sensor Interface with USB Diagnostics, Low-Power Data Logger, LIN/CAN Gateway Node, Battery-Powered IoT Edge Device, USB Development Board / Educational Platform, Custom USB Test/Measurement Instrument.
USB HID Peripherals (Keyboard, Mouse, Custom Input)
The PIC18LF4455T-I/PT's integrated Full-Speed USB 2.0 peripheral with 12 Mbit/s signalling and on-chip transceiver makes it ideal for USB HID device firmware. It eliminates external PHY ICs and supports HID, CDC, and custom USB classes natively. With 24 KB Flash, designers can implement HID report tables, debounce routines, and bootloaders in a single chip. The 48 MHz PIC18 core delivers 12 MIPS throughput, sufficient to handle USB polling, endpoint handling, and HID report generation in real time without external logic. Operating from 2.0 V to 5.5 V supports both bus-powered 5 V designs and 3.3 V low-power variants.
おすすめ
Industrial Sensor Interface with USB Diagnostics
The PIC18LF4455T-I/PT's 13-channel 10-bit ADC, 2.0-5.5 V supply, and Full-Speed USB enable industrial sensor signal conditioning with USB-based diagnostics or data streaming. The 48 MHz CPU digitises multiple analog sensor channels while maintaining a USB isochronous endpoint for real-time data. The -40C to +85C industrial temperature rating supports factory floor environments. nanoWatt XLP technology reduces quiescent draw during inactive periods, allowing battery-backed sensor nodes that wake on interrupt for periodic measurements. CTMU enables capacitive touch sensing for HMI front panels.
おすすめ
Low-Power Data Logger
The PIC18LF4455T-I/PT's nanoWatt XLP technology, 2.0-5.5 V operation, and 256-byte EEPROM make it ideal for portable, battery-powered data loggers. Sleep currents down to tens of nanoamps extend battery life to months or years. On-chip 10-bit ADC captures analog measurements; EEPROM stores configuration and calibration data with 1M erase/write cycles. The USB peripheral enables field data extraction and firmware updates without disassembly. Industrial temperature range supports outdoor environmental monitoring, while internal 8 MHz/32 kHz oscillators minimise external components.
おすすめ
LIN/CAN Gateway Node
The PIC18LF4455T-I/PT integrates an asynchronous LIN-capable EUSART and supports automotive sub-bus protocols while the USB 2.0 FS peripheral handles gateway communication to host systems. This makes the part suitable for vehicle diagnostic bridges, fleet-management dongles, and automotive accessory controllers that translate between LIN subnets and USB host stacks. The -40C to +85C industrial temperature grade covers cabin environments, and 2.0-5.5 V operation tolerates automotive battery transients when properly filtered. PIC18 instruction set is supported by automotive-grade compilers (MPLAB XC8 with MISRA C).
おすすめ
Battery-Powered IoT Edge Device
The PIC18LF4455T-I/PT's nanoWatt XLP technology, 2.0 V minimum supply, and Full-Speed USB (for charging and provisioning) suit battery-powered IoT edge nodes that communicate intermittently with a host. The 24 KB Flash accommodates small TCP/IP-over-USB stacks, MQTT-SN firmware, or proprietary edge-AI inference routines. Sleep currents under 100 nA with RTC wake extend coin-cell battery life across multi-year deployments. The internal 32 kHz oscillator provides RTC-grade timing without external crystals, reducing BOM cost for volume IoT products.
おすすめ
USB Development Board / Educational Platform
The PIC18LF4455T-I/PT is widely used in Microchip's Low Pin Count USB Development Kit and Curiosity development boards for embedded USB education and rapid prototyping. The integrated USB transceiver eliminates the need for external PHY circuitry in student projects, simplifying layout and reducing the entry barrier to USB programming. The 44-pin TQFP package has standard breakout headers and Arduino-style shield compatibility on most Microchip curiosity boards. MPLAB X IDE and XC8 compiler provide free toolchain support, making this part a common starting point for embedded USB courses and hobbyist makers.
おすすめ
Custom USB Test/Measurement Instrument
The PIC18LF4455T-I/PT's USB FS peripheral, 48 MHz CPU, and 10-bit ADC suit low-cost USB-based test instruments such as logic analysers, simple oscilloscopes, and protocol sniffers. The 12 MIPS instruction throughput handles USB streaming while sampling analog or digital channels, and 2048 bytes SRAM buffers USB endpoint data. The 5-bit internal DAC and PWM channels provide stimulus outputs for closed-loop test fixtures. Hobbyists and test-equipment manufacturers use this MCU as the USB bridge in cost-sensitive laboratory tools and lab-grade instruments.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC18LF4455T-I/PT — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | PIC18LF4550-I/PT | PIC18LF4450T-I/PT | PIC18LF4455-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same |
| Program Flash | 24 KB | 32 KB (+33%) | 24 KB (same) | 24 KB (same) |
| CPU Frequency | 48 MHz | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) |
| USB Peripheral | FS USB 2.0 (12 Mbit/s) | FS USB 2.0 (same) | FS USB 2.0 (same) | FS USB 2.0 (same) |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V (same) | 2.0 V to 5.5 V (same) | 2.0 V to 5.5 V (same) |
| Data EEPROM | 256 bytes | 256 bytes (same) | 256 bytes (same) | 256 bytes (same) |
| Operating Temperature | -40C to +85C | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) |
| Packaging Type | Tape & Reel (T suffix) | Tray (no T suffix) | Tape & Reel (T suffix) | Tray (no T suffix) |
主な差別化要因
- Integrated Full-Speed USB 2.0 with on-chip transceiver （vs PIC18LF2550T-I/ML (28-pin variant))
- 24 KB Flash vs LF4550's 32 KB （vs PIC18LF4550-I/PT)
- Industrial -40C to +85C temperature range with nanoWatt XLP （vs PIC18F4455T-I/PT (F variant))
- Tape and Reel packaging for high-volume SMT （vs PIC18LF4455-I/PT (tray variant))
設計ノート
Route the USB D+ (RC5) and D- (RC4) traces as a 90-ohm differential pair with characteristic impedance controlled to USB 2.0 FS spec. Keep trace length matching within 150 mil, and avoid stubs. Place the VUSB pin decoupling capacitor (220 nF to 1 uF) within 2 milliohms of the pin. Series ferrite beads on VBUS reduce conducted EMI from upstream USB hosts.
The PIC18LF4455T-I/PT's internal 3.3V USB regulator on VUSB pin requires a minimum 220 nF decoupling capacitor. For bus-powered designs, ensure VBUS is sensed on the RC5/D+ pin via internal pull-up configuration per USB spec. nanoWatt XLP sleep currents under 100 nA require that all digital inputs be driven to defined levels - floating inputs can increase quiescent current by orders of magnitude.
Do not exceed the absolute maximums of 6.0 V on VDD - automotive load-dump transients must be clamped externally. Ensure the MCLR pin (pin 1) has a proper 10 kohm pull-up to VDD; leaving MCLR floating can cause intermittent resets. Configure the CONFIG words (oscillator, watchdog, brown-out) correctly in source code before programming - factory defaults are not always suitable for USB applications.
When driving long cables or external peripherals from PORTB or PORTD pins, place 22-100 ohm series resistors within 50 milliohms of the MCU pin to dampen reflections. For analog inputs AN0-AN13, add a 100 nF ceramic bypass cap close to the pin when source impedance exceeds 10 kohm to prevent ADC sampling errors. The internal bandgap reference has 1.2% typical accuracy - calibrate against VDD for precision measurements.
コンプライアンス情報
RoHS and REACH compliance per Microchip product declaration. Not AEC-Q100 qualified - choose PIC18LF4550-I/PT automotive variants for vehicular applications. Halogen-free status not explicitly verified; default Microchip LF family practice applies.