PIC18LF4458-I/PT - 8-Bit 48MHz USB MCU, 24KB Flash | Microchip
Артикул: PIC18LF4458-I/PT ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $6.45 | $6,45 |
| 10 | $5.8 | $58,00 |
| 100 | $5.2 | $520,00 |
| 500 | $4.65 | $2.325,00 |
| 1.000 | $4.1 | $4.100,00 |
PIC18LF4458-I/PT Обзор
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (RAM), and a rich set of digital and analog peripherals (timers, ADC, communication ports, USB, etc.) on a single silicon die. The PIC18F family sits in Microchip's 8-bit PIC taxonomy above the baseline PIC10/12/16 families, offering higher performance (up to 12 MIPS at 48 MHz), larger memory and the Enhanced Flash architecture with self-programmability. The PIC18LF4458 is the low-voltage 'LF' variant, optimized for operation down to 2.0 V, which makes it suitable for battery-powered or regulated 3.3 V designs.
Key specifications include a 2.0 V to 5.5 V supply range, 34 digital I/O lines, integrated USB 2.0 Full-Speed transceiver, 10-bit ADC, multiple timers, I2C, SPI, USART, and nanoWatt power-management modes that drop current consumption to microampere levels during idle and sleep states. The 'I' suffix denotes an industrial temperature range of -40C to +85C.
The device uses Microchip's Enhanced Harvard RISC architecture with a 16-bit instruction word and 8-bit data path. The 12 MIPS (million instructions per second) throughput at 48 MHz is sufficient for real-time USB class firmware (CDC, HID, MSD), sensor processing, and human-interface control loops. The on-chip 24 KB Enhanced Flash supports self-programming under firmware control, enabling bootloader-based field updates.
Typical applications include USB peripherals (HID keyboards, mice, gamepads, CDC serial adapters), industrial data-acquisition front-ends, home-automation controllers, smart sensors with USB diagnostics ports, and low-cost consumer electronics that need USB connectivity without a dedicated PHY IC. Designers value the LF variant when system rails are already 3.3 V and the USB bus is self- or bus-powered.
When laying out the 44-pin TQFP, place the decoupling capacitors (100 nF plus 4.7 uF bulk) as close as possible to VDD/VSS pairs, route the D+/D- USB pair with 90 ohm differential impedance, and ensure the exposed pad (if present) is soldered to the ground plane for thermal and electrical performance. Always include a 0.1 uF cap on VUSB when the internal USB regulator is used.
This page synthesizes distributor pricing, drop-in compatible alternatives, application notes and design considerations that go beyond what is printed on the Microchip datasheet, helping engineers select the right MCU quickly and avoid common layout pitfalls.
Аналоги без доработки для PIC18LF4458-I/PT — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC18LF4458-I/PT (тот же форм-фактор и посадочное место) — отличается по ADC, Core Architecture, Timers, Package, Maximum CPU Frequency.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC18LF4455-I/PT
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
PIC18LF4550-I/PT
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC18F4458-I/PT
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$5.79 / шт.
Открыть даташит →PIC18LF4555-I/PT
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
PIC18LF4455T-I/PT
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$5.03 / шт.
Открыть даташит →PIC18LF4458-I/PT Максимальные параметры и электрические характеристики
| Product Family | PIC18F |
| Core Architecture | 8-bit PIC (Enhanced Harvard RISC) |
| CPU Clock Speed | 48 MHz (12 MIPS) |
| Program Memory Type | Enhanced Flash (self-programmable) |
| Program Memory Size | 24 KB (12K x 16 words) |
| Data RAM | 2 KB |
| Data EEPROM | 256 bytes (typical for this family) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Digital I/O Pins | 34 |
| USB Peripheral | USB 2.0 Full-Speed (12 Mbps), internal transceiver |
| ADC | 10-bit, multi-channel (typical for PIC18F445x/455x family) |
| Communication Interfaces | I2C, SPI, USART (Enhanced), USB |
| Timers | Multiple 8-bit and 16-bit timers (typical for family) |
| Power-Saving Modes | nanoWatt Technology (Idle, Sleep, Deep Sleep) |
| Диапазон рабочих температур | -40C to +85C (Industrial, 'I' suffix) |
| Корпус | 44-pin TQFP (PT), 10x10 mm |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant (lead-free TQFP) |
Конфигурация выводов PIC18LF4458-I/PT
| Контакт 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / digital I/O RE3 |
| Контакт 2 | RA0/AN0 — Digital I/O RA0 / analog input AN0 |
| Контакт 3 | RA1/AN1 — Digital I/O RA1 / analog input AN1 |
| Контакт 4 | RA2/AN2/VREF- — Digital I/O RA2 / analog input AN2 / ADC negative reference |
| Контакт 5 | RA3/AN3/VREF+ — Digital I/O RA3 / analog input AN3 / ADC positive reference |
| Контакт 6 | RA4/T0CKI/C1OUT — Digital I/O RA4 / Timer0 clock input / comparator 1 output |
| Контакт 7 | RA5/AN4/SS/HLVDIN/C2OUT — Digital I/O RA5 / analog input AN4 / SPI slave select / HLVD input |
| Контакт 8 | OSC2/CLKO/RA6 — Crystal output / clock output / digital I/O RA6 |
| Контакт 9 | OSC1/CLKI/RA7 — Crystal input / clock input / digital I/O RA7 |
| Контакт 10 | RC0/T1OSO/T1CKI — Digital I/O RC0 / Timer1 oscillator output / Timer1 clock input |
| Контакт 11 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Контакт 12 | VSS — Ground reference |
| Контакт 13 | RC1/T1OSI/CCP2 — Digital I/O RC1 / Timer1 oscillator input / CCP2 PWM output |
| Контакт 14 | RC2/CCP1 — Digital I/O RC2 / CCP1 PWM output |
| Контакт 15 | RC4/D-/VM — USB D- line / digital I/O RC4 / USB VBUS monitor input |
| Контакт 16 | RC5/D+/VP — USB D+ line / digital I/O RC5 / USB VBUS power input |
| Контакт 17 | VUSB — Internal USB 3.3 V regulator output (decouple with 0.1 uF + 4.7 uF) |
| Контакт 18 | RD0/SPP0 — Digital I/O RD0 / Streaming Parallel Port data bit 0 |
| Контакт 19 | RD1/SPP1 — Digital I/O RD1 / Streaming Parallel Port data bit 1 |
| Контакт 20 | RD2/SPP2 — Digital I/O RD2 / Streaming Parallel Port data bit 2 |
| Контакт 21 | RD3/SPP3 — Digital I/O RD3 / Streaming Parallel Port data bit 3 |
| Контакт 22 | RC6/TX/CK — Digital I/O RC6 / USART TX / USART clock |
| Контакт 23 | RC7/RX/DT — Digital I/O RC7 / USART RX / USART data |
| Контакт 24 | RD4/SPP4 — Digital I/O RD4 / Streaming Parallel Port data bit 4 |
| Контакт 25 | RD5/SPP5 — Digital I/O RD5 / Streaming Parallel Port data bit 5 |
| Контакт 26 | RD6/SPP6 — Digital I/O RD6 / Streaming Parallel Port data bit 6 |
| Контакт 27 | RD7/SPP7 — Digital I/O RD7 / Streaming Parallel Port data bit 7 |
| Контакт 28 | VSS — Ground reference |
| Контакт 29 | RB0/AN12/INT0/FLT0 — Digital I/O RB0 / analog input AN12 / external interrupt 0 / PWM fault input |
| Контакт 30 | RB1/AN10/INT1 — Digital I/O RB1 / analog input AN10 / external interrupt 1 |
| Контакт 31 | RB2/AN8/INT2/VMO — Digital I/O RB2 / analog input AN8 / external interrupt 2 / SPP VMO |
| Контакт 32 | RB3/AN9/CCP2/VPO — Digital I/O RB3 / analog input AN9 / CCP2 / SPP VPO |
| Контакт 33 | RB4/AN11/KBI0 — Digital I/O RB4 / analog input AN11 / interrupt-on-change KBI0 |
| Контакт 34 | RB5/KBI1/PGM — Digital I/O RB5 / interrupt-on-change KBI1 / LVP programming |
| Контакт 35 | RB6/KBI2/PGC — Digital I/O RB6 / interrupt-on-change KBI2 / ICSP clock |
| Контакт 36 | RB7/KBI3/PGD — Digital I/O RB7 / interrupt-on-change KBI3 / ICSP data |
| Контакт 37 | RE0/RD — Digital I/O RE0 / Parallel Port read control |
| Контакт 38 | RE1/WR — Digital I/O RE1 / Parallel Port write control |
| Контакт 39 | RE2/CS — Digital I/O RE2 / Parallel Port chip select |
| Контакт 40 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Контакт 41 | VSS — Ground reference |
| Контакт 42 | RC3/SCK/SCL — Digital I/O RC3 / SPI clock / I2C clock |
| Контакт 43 | RC4/D-/VM — USB D- line (alternate pin) |
| Контакт 44 | RC5/D+/VP — USB D+ line (alternate pin) |
Типичное применение
PIC18LF4458-I/PT подходит для 6 применениеs: USB HID Peripherals (Keyboard, Mouse, Gamepad), USB-to-UART (CDC) Bridge Adapters, Industrial Data-Acquisition Front-End, Home-Automation Controllers, Consumer Electronics with USB Diagnostics Port, USB Mass-Storage (MSD) Bootloader Devices.
USB HID Peripherals (Keyboard, Mouse, Gamepad)
The PIC18LF4458-I/PT is a strong fit for USB HID class peripherals because its integrated USB 2.0 Full-Speed transceiver eliminates an external PHY and its 48 MHz / 12 MIPS core handles HID polling plus key-matrix or quadrature decoding in real time. The 24 KB Enhanced Flash fits Microchip's free USB stack (CDC, HID, MSD) plus application code, while 2 KB SRAM comfortably holds HID report buffers and protocol state. Operated at 3.3 V from the USB VBUS rail, the LF variant avoids a 5 V regulator, simplifying bus-powered designs. Performance consideration: USB interrupt latency on PIC18F is typically < 5 us at 48 MHz, well within the 1 ms USB frame budget.
Рекомендуется
USB-to-UART (CDC) Bridge Adapters
The PIC18LF4458-I/PT works well as a USB CDC bridge that presents a virtual COM port to the host and converts it to UART on the application side. The on-chip USART (Enhanced) supports up to 5 Mbps, the USB Full-Speed endpoint RAM buffers up to 64-byte packets, and the 48 MHz core runs Microchip's CDC stack without taxing CPU budget. Engineers commonly use this for debugging embedded targets, programming FPGAs over JTAG-to-UART bridges, or replacing legacy RS-232 ports. Performance consideration: at 48 MHz the CDC-to-UART throughput saturates at the UART baud rate (typically 921600 bps to 1 Mbps), with negligible CPU overhead.
Рекомендуется
Industrial Data-Acquisition Front-End
In industrial data-acquisition front-ends, the PIC18LF4458-I/PT samples analog signals with its 10-bit ADC, pre-processes data in firmware, and streams results over USB to a host PC for logging. The industrial -40C to +85C temperature rating supports factory-floor deployment, the nanoWatt sleep modes reduce quiescent current below 1 uA for battery-backed sensors, and the LF voltage range (2.0 V to 5.5 V) accepts directly regulated 3.3 V or 5 V rails. Performance consideration: the 10-bit ADC at 48 MHz clock supports up to ~100 ksps, sufficient for vibration, temperature, and pressure sensors in industrial monitoring.
Рекомендуется
Home-Automation Controllers
The PIC18LF4458-I/PT fits home-automation hubs that need a USB diagnostic/configuration port plus on-board logic for relays, sensors, and wireless modules. Its 34 I/O pins drive multi-channel relay boards or interface with NRF24L01 / LoRa modules over SPI, while the USB port serves as a service-port for firmware update and configuration from a PC. The 3.3 V operation aligns with modern wireless modules, eliminating level shifters. Performance consideration: at 48 MHz the MCU can poll multiple sensor streams and respond to USB control transfers concurrently without dropping USB frames, making it suitable for always-on home gateways.
Рекомендуется
Consumer Electronics with USB Diagnostics Port
In consumer electronics such as toys, fitness devices and small appliances, the PIC18LF4458-I/PT serves as the main MCU and exposes a USB port for factory calibration, firmware updates and field diagnostics. Its low BOM cost (integrated USB, internal oscillator option) reduces part count, the 2 KB RAM holds temporary diagnostic buffers, and the Enhanced Flash supports bootloader-based field updates via USB. Performance consideration: the bootloader portion typically uses < 4 KB Flash, leaving the remainder for application code. LF operation at 3.3 V suits direct Li-ion battery connection via an LDO.
Рекомендуется
USB Mass-Storage (MSD) Bootloader Devices
The PIC18LF4458-I/PT can act as a USB MSD bootloader host or device that appears as a removable drive to a PC, dragging-and-dropping new firmware images. The internal Flash supports self-programming, the 24 KB space accommodates a FAT12/16 MSD stack plus bootloader, and the USB Full-Speed peripheral provides the required Bulk-Only Transport endpoint. Performance consideration: writing 16 KB to internal Flash takes ~1 second at typical row-write rates, so end users see only a brief disconnect during firmware update - acceptable for hobbyist and prosumer applications.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC18LF4458-I/PT — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC18LF4455-I/PT | PIC18LF4550-I/PT | PIC18F4458-I/PT | PIC18LF4555-I/PT | PIC18LF4455T-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (PT), 10x10 mm | 44-TQFP (PT), 10x10 mm - same | 44-TQFP (PT), 10x10 mm - same | 44-TQFP (PT), 10x10 mm - same | 44-TQFP (PT), 10x10 mm - same | 44-TQFP (PT), 10x10 mm - same |
| Core / CPU Clock | 8-bit PIC18F, 48 MHz | 8-bit PIC18F, 48 MHz - same | 8-bit PIC18F, 48 MHz - same | 8-bit PIC18F, 48 MHz - same | 8-bit PIC18F, 48 MHz - same | 8-bit PIC18F, 48 MHz - same |
| Flash Memory | 24 KB | 24 KB | 32 KB | 24 KB | 48 KB | 24 KB |
| RAM | 2 KB | 2 KB - same | 2 KB - same | 2 KB - same | 2 KB - same | 2 KB - 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 | 4.2 V to 5.5 V | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same |
| USB Peripheral | USB 2.0 Full-Speed, integrated | USB 2.0 Full-Speed, integrated - same | USB 2.0 Full-Speed, integrated - same | USB 2.0 Full-Speed, integrated - same | USB 2.0 Full-Speed, integrated - same | USB 2.0 Full-Speed, integrated - same |
| I/O Pins | 34 | 34 - same | 34 - same | 34 - same | 34 - same | 34 - same |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) - same | -40C to +85C (Industrial) - same | -40C to +85C (Industrial) - same | -40C to +85C (Industrial) - same | -40C to +85C (Industrial) - same |
| Approximate Unit Price (qty 1000) | USD 4.10 (as of 2026-09-28) | USD ~3.95 (as of 2026-09-28) | USD ~4.50 (as of 2026-09-28) | USD ~4.20 (as of 2026-09-28) | USD ~5.10 (as of 2026-09-28) | USD ~3.95 (tape-and-reel, as of 2026-09-28) |
Ключевые отличия
- LF variant supports 2.0 V to 5.5 V operation, ideal for 3.3 V-only USB designs (против PIC18F4458-I/PT)
- 24 KB Flash is sized for cost-sensitive USB HID / CDC designs (против PIC18LF4550-I/PT)
- Integrated USB 2.0 Full-Speed transceiver eliminates external PHY (против PIC18LF2550-I/SP (28-pin))
- Industrial -40C to +85C temperature rating (против Consumer-grade MCU alternatives)
Заметки по проектированию
Route the USB D+ (pin 16) and D- (pin 15) differential pair with 90 ohm differential impedance, length-matched within 2 mm, and place the VUSB decoupling capacitor (0.1 uF ceramic plus 4.7 uF bulk) within 3 mm of the VUSB pin. The D+/D- traces should be kept away from clock and switching signals to minimize radiated EMI on the USB bus. Refer to Microchip AN612 - PCB Design Guidelines for USB 2.0 for a complete checklist.
Place a 0.1 uF ceramic decoupling capacitor on each VDD pin (11, 32) and each AVVD/VSS pair, with the capacitor loop area kept under 25 mm^2 to minimize inductance. The PIC18LF4458's internal USB 3.3 V regulator requires VUSB decoupling to meet USB suspend current specifications; without proper decoupling the regulator may oscillate and cause USB enumeration failures. Estimated: total bulk capacitance budget is ~10 uF across VDD rails for reliable USB operation at full speed.
Do not connect MCLR (pin 1) directly to VDD without a 10 kohm pull-up resistor and 100 nF capacitor to ground for proper reset behavior. Always configure the CONFIG words (especially the oscillator, watchdog and brown-out settings) before code execution; failure to do so is the most common reason prototypes refuse to start. For low-voltage (LF) operation below 3.0 V, ensure the BOR (Brown-Out Reset) voltage is configured for the appropriate trip point.
When using the on-chip USB transceiver in low-speed mode (1.5 Mbps), the D- line has an internal pull-up that may interfere with low-power sleep modes; configure the UPUEN bit appropriately before entering sleep. For Full-Speed USB, ensure the internal 96 MHz PLL is locked (check the USB PLL lock status bit) before USB transactions to avoid framing errors.
The 44-pin TQFP package has a typical theta_JA of ~50 C/W in still air, so thermal management is rarely a concern for USB MCU applications where typical power consumption is below 50 mW. However, in industrial enclosures with no airflow, derate by ~20% from the datasheet maximum ratings. The PIC18LF4458 LF variant dissipates less power than the F variant at equivalent clock speeds due to the lower core voltage.
Информация о соответствии
Lead-free TQFP package per Microchip product page. Not AEC-Q100 qualified - this is a general-purpose MCU; automotive designs should use the AEC-Q100-qualified PIC18F variants in the same family. RoHS and REACH compliant per Microchip environmental documentation.