PIC18F4458-I/PT - 8-Bit 48MHz USB MCU 24KB Flash | Microchip
料号： PIC18F4458-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.2 | $8.20 |
| 10 | $7.46 | $74.60 |
| 100 | $6.85 | $685.00 |
| 500 | $6.21 | $3,105.00 |
| 1,000 | $5.79 | $5,790.00 |
PIC18F4458-I/PT 概述
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), working memory (RAM), non-volatile data memory (EEPROM), and programmable I/O peripherals. PIC18F MCUs use Microchip's enhanced Harvard architecture with a 16-bit instruction word and 8-bit data path, belonging to the 8-bit microcontroller family in the broader category of embedded processors / microcontrollers / semiconductors. The PIC18F4458 specifically sits in the high-performance Flash USB family, optimized for low-power (nanoWatt) and connectivity applications that require precision analog.
Key features include 35 digital I/O pins, a 10-channel 12-bit ADC, Capture/Compare/PWM modules, two 8-bit timers and three 16-bit timers, an enhanced USART, and nanoWatt power management for sleep currents in the microampere range. The internal 16 MHz RC oscillator can be combined with the 4x PLL to deliver the full 48 MHz instruction rate, eliminating the need for an external crystal in many designs. Hardware multipliers and a hardware 8x8 multiply engine accelerate DSP-like routines.
The PIC18F4458 uses an enhanced Harvard architecture with separate program and data buses, enabling single-cycle instruction fetch from Flash. The integrated USB 2.0 Full-Speed transceiver, with on-chip 3.3V regulator and pull-up resistors, simplifies USB device designs and removes several external components typical of older MCUs. With 24KB self-programmable Flash, designers can implement In-Circuit Serial Programming (ICSP) and runtime firmware updates.
Typical applications include USB peripherals (HID, CDC, custom classes), industrial sensors with USB diagnostics, data loggers, USB-to-UART bridges, low-cost USB measurement instruments, and consumer devices requiring 12-bit precision analog. The combination of USB, ADC, and PWM makes it well-suited to motor-control front ends, lighting controllers, and embedded human-interface devices.
When designing with the PIC18F4458, observe the recommended decoupling (100 nF + 10 uF near VDD/VSS) and follow Microchip AN956 (migration between PIC18F4550 family members). The USB D+/D- lines should be routed with 90 ohm differential impedance; the VUSB pin must be decoupled with a 220 nF capacitor. For lowest power, use the nanoWatt sleep modes with wake-on-interrupt.
This page synthesizes distributor pricing, drop-in alternatives, design notes, and pinout diagrams not found in the manufacturer datasheet, giving engineers a faster path to a USB-enabled 8-bit design than searching spec sheets individually.
直接替换替代料： PIC18F4458-I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18F4458-I/PT （相同外形与封装尺寸） ——差异在于 Timers, ADC, Core Architecture, Operating Temperature, Package.
快速对比工具——选择替代料号进行并排对比：
PIC18F4550-I/PT
✅ 直接替换✓ 有现货
$4.95 / 个
查看数据手册 →PIC18F4455-I/PT
✅ 直接替换✓ 有现货
$4.85 / 个
查看数据手册 →PIC18F4450-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F458-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F46K22-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.32 / 个
查看数据手册 →PIC18F4458-I/PT 最大额定值与电气特性
| Core Architecture | PIC18F (8-bit enhanced Harvard) |
| Program Memory (Flash) | 24 KB (12K x 16) |
| Data RAM | 2 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 48 MHz (with 4x PLL) |
| Operating Voltage (VDD) | 4.2 V to 5.5 V (USB regulator off); 4.35 V to 5.25 V (USB on) |
| Digital I/O Pins | 35 |
| ADC | 10-channel 12-bit |
| USB | USB 2.0 Full-Speed (12 Mbit/s) with on-chip transceiver |
| I2C | 1 x I2C (Master/Slave) |
| SPI | 1 x SPI (up to 10 Mbit/s) |
| UART | 1 x Enhanced USART |
| Timers | 2 x 8-bit, 3 x 16-bit |
| CCP/ECCP Modules | 2 CCP + 1 ECCP |
| 封装 | 44-pin TQFP (10x10 mm) |
| Operating Temperature (I suffix) | -40 C to +85 C |
| 安装类型 | Surface Mount |
| Programming | ICSP (In-Circuit Serial Programming) |
| RoHS 状态 | Compliant |
PIC18F4458-I/PT 引脚配置
| 引脚 1 | RC2 — Digital I/O / CCP1 PWM output |
| 引脚 2 | RC3 — Digital I/O / SPI SCK clock output |
| 引脚 3 | RC4 — Digital I/O / USB D- data line |
| 引脚 4 | RC5 — Digital I/O / USB D+ data line |
| 引脚 5 | RC6 — Digital I/O / USART TX |
| 引脚 6 | RC7 — Digital I/O / USART RX |
| 引脚 7 | RD0 — Digital I/O / PSP data bit 0 |
| 引脚 8 | RD1 — Digital I/O / PSP data bit 1 |
| 引脚 9 | RD2 — Digital I/O / PSP data bit 2 |
| 引脚 10 | RD3 — Digital I/O / PSP data bit 3 |
| 引脚 11 | VDD — Positive power supply (4.2 V to 5.5 V) |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | OSC1/CLKI — Crystal oscillator input or external clock |
| 引脚 14 | OSC2/CLKO — Crystal oscillator output |
| 引脚 15 | RC0 — Digital I/O / Timer1 oscillator |
| 引脚 16 | RC1 — Digital I/O / ECCP compare output |
| 引脚 17 | RA0 — Digital I/O / AN0 analog input |
| 引脚 18 | RA1 — Digital I/O / AN1 analog input |
| 引脚 19 | RA2 — Digital I/O / AN2 analog input |
| 引脚 20 | RA3 — Digital I/O / AN3 analog input |
| 引脚 21 | RA4 — Digital I/O / T0CKI timer0 clock |
| 引脚 22 | RA5 — Digital I/O / AN4 analog input |
| 引脚 23 | RE0 — Digital I/O / AN5 / RD control |
| 引脚 24 | RE1 — Digital I/O / AN6 / WR control |
| 引脚 25 | RE2 — Digital I/O / AN7 / CS control |
| 引脚 26 | VUSB — USB 3.3V internal regulator output (decouple 220 nF) |
| 引脚 27 | VDD — Positive power supply |
| 引脚 28 | VSS — Ground |
| 引脚 29 | RB0 — Digital I/O / INT0 external interrupt |
| 引脚 30 | RB1 — Digital I/O / AN8 analog input |
| 引脚 31 | RB2 — Digital I/O / AN9 analog input |
| 引脚 32 | RB3 — Digital I/O / AN10 analog input / CCP2 output |
| 引脚 33 | RB4 — Digital I/O / AN11 analog input |
| 引脚 34 | RB5 — Digital I/O / AN12 analog input / PGM |
| 引脚 35 | RB6 — Digital I/O / PGC ICSP clock |
| 引脚 36 | RB7 — Digital I/O / PGD ICSP data |
| 引脚 37 | RD4 — Digital I/O / PSP data bit 4 |
| 引脚 38 | RD5 — Digital I/O / PSP data bit 5 |
| 引脚 39 | RD6 — Digital I/O / PSP data bit 6 |
| 引脚 40 | RD7 — Digital I/O / PSP data bit 7 |
| 引脚 41 | VSS — Ground |
| 引脚 42 | VDD — Positive power supply |
| 引脚 43 | AVDD — Analog power supply (tie to VDD) |
| 引脚 44 | AVSS — Analog ground (tie to VSS) |
典型应用
PIC18F4458-I/PT 适用于 6 应用s: USB Human Interface Device (HID), USB-to-UART Bridge, Industrial Sensor Node with USB Diagnostics, USB Data Logger, USB-Connected Motor / Lighting Controller, USB-Based Custom Test Instrument.
USB Human Interface Device (HID)
The PIC18F4458-I/PT is well-suited for USB HID peripherals such as custom keyboards, mice, game controllers, and industrial input devices. Its integrated Full-Speed USB 2.0 transceiver with on-chip PHY and pull-up resistors eliminates external USB components, reducing BOM and PCB area. At 48 MHz CPU speed, the device easily handles HID class polling at 1 ms intervals with margin for custom descriptor parsing. Pair it with a 12 MHz crystal plus the 4x PLL for a stable USB clock and use the nanoWatt sleep modes for battery-powered wireless HID dongles.
推荐
USB-to-UART Bridge
The PIC18F4458-I/PT can implement a USB CDC class device that bridges USB to the on-chip Enhanced USART, effectively replacing an FTDI-style cable. The integrated USB controller handles enumeration, descriptors, and the CDC interrupt/baud-rate pipeline at full USB 2.0 speed. The 48 MHz instruction rate with hardware multiplier lets firmware sustain 921600 baud and higher on the UART without data loss. The 12-bit ADC can also be exposed as a virtual COM port channel for combined USB-serial-ADC dongles used in test and measurement.
推荐
Industrial Sensor Node with USB Diagnostics
The PIC18F4458-I/PT industrial-grade -40C to +85C rating and 12-bit ADC make it a natural fit for factory-floor sensor nodes that expose live readings over USB. The 10-channel ADC reads multiple analog sensors (temperature, pressure, strain) while the 5 timers handle periodic sampling and the USB link streams diagnostics to a host PC. nanoWatt sleep modes drop quiescent current low enough for solar or battery-backed sensors. The /PT TQFP package supports -40C to +85C operation in convection-cooled industrial enclosures.
推荐
USB Data Logger
The PIC18F4458-I/PT's 24KB Flash and 2KB RAM enable firmware for a multi-channel USB data logger that records ADC readings to internal EEPROM or external SPI Flash and streams dumps over USB. With 256 bytes of EEPROM and the SPI port running up to 10 Mbit/s, designers can store significant time-series data before offload. The MCU's enhanced USART also supports RS-232/485 loggers as a fallback transport. Watchdog and Brown-Out Reset features ensure reliable field deployment without manual resets.
推荐
USB-Connected Motor / Lighting Controller
The PIC18F4458-I/PT's two CCP plus one ECCP module drive PWM channels for brushed DC, stepper, or LED dimming, with USB providing command and telemetry. At 48 MHz, PWM resolution reaches well below 1% duty cycle for high-fidelity lighting fade or smooth motor torque profiles. The 12-bit ADC reads back current or light sensors for closed-loop control, while USB carries setpoint updates from a host PC. /PT TQFP package with 35 I/O pins gives enough headroom for multiple H-bridge signals and indicator LEDs.
推荐
USB-Based Custom Test Instrument
For low-cost bench instruments, the PIC18F4458-I/PT acts as the acquisition front-end while USB streams samples to a host PC for analysis. The 12-bit ADC at up to 100 ksps captures transient signals, and the SPI master reads external high-speed ADCs if more bandwidth is needed. USB Full-Speed (12 Mbit/s) supports roughly 1 Msps aggregate throughput after protocol overhead, sufficient for audio-bandwidth scopes and simple function generators. The /PT TQFP keeps the design compact for handheld probes.
推荐
推荐产品汇总
工程参考数据： PIC18F4458-I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18F4550-I/PT | PIC18F4455-I/PT | PIC18F4450-I/PT | PIC18F458-I/PT | PIC18F46K22-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (10x10 mm) | 44-pin TQFP - same | 44-pin TQFP - same | 44-pin TQFP - same | 44-pin TQFP - same | 44-pin TQFP - same |
| Flash | 24 KB | 32 KB | 24 KB | 32 KB | 32 KB | 64 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 3.8 KB |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 40 MHz | 64 MHz |
| USB Controller | Full-Speed USB 2.0 on-chip | Full-Speed USB 2.0 on-chip | Full-Speed USB 2.0 on-chip | Full-Speed USB 2.0 on-chip | Full-Speed USB 2.0 on-chip | No integrated USB |
| ADC | 10-channel 12-bit | 13-channel 12-bit | 10-channel 12-bit | 13-channel 12-bit | 8-channel 12-bit | 28-channel 12-bit |
| Operating Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 1.8 V to 5.5 V |
关键差异点
- Integrated Full-Speed USB 2.0 with on-chip transceiver （对比 PIC18F46K22-I/PT)
- Drop-in compatible with PIC18F4550 family （对比 PIC18F458-I/PT)
- 24KB Flash provides 8KB more headroom than 16KB-tier devices （对比 PIC18F2455-I/SP)
设计说明
Decouple each VDD/VSS pair with a 100 nF X7R ceramic placed within 5 mm of the pins, and add a single 10 uF bulk capacitor near the package. The VUSB pin (USB 3.3V regulator output) MUST be decoupled with a 220 nF ceramic per datasheet, otherwise USB enumeration may fail intermittently. Keep the D+/D- trace pair matched to 90 ohm differential impedance with no splits in the ground plane beneath them.
Although the PIC18F4458-I/PT supports 4.2 V to 5.5 V, the integrated USB regulator needs the upper portion of that range; ensure VDD stays above 4.35 V when USB is active. For 3.3V-only systems, choose the PIC18LF4458 instead - it operates from 2.0 V to 5.5 V. The nanoWatt idle and sleep currents drop below 1 uA with peripheral modules disabled, enabling battery-backed industrial nodes.
Do not confuse -I (industrial -40C to +85C) with -E (extended -40C to +125C); order the correct suffix for your environment. The /PT TQFP pin 1 is at top-left with the dot marker; pin 44 is opposite. Configuration bits must be set to HS-PLL with CPUDIV = 1 for full 48 MHz operation, otherwise the device latches at 4 MHz. Always review Microchip AN956 when migrating between PIC18F4550 family members to avoid register-level mismatches.
合规信息
RoHS compliant per Microchip product page; -I suffix denotes industrial temperature grade, not automotive AEC-Q100. Choose PIC18F4458-I/PT for industrial / consumer USB designs.