PIC18F458-E/PT - 8-bit MCU 32KB Flash CAN TQFP-44 | PIC18F
料号： PIC18F458-E/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.34 | $12.34 |
| 10 | $11.2 | $112.00 |
| 100 | $10.05 | $1,005.00 |
| 500 | $9.1 | $4,550.00 |
| 1,000 | $8.4 | $8,400.00 |
PIC18F458-E/PT 概述
What is a PIC18F microcontroller? The PIC18F family is Microchip's enhanced 8-bit RISC architecture built on a 16-bit instruction word, positioned hierarchically as: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor. Compared to base-line PIC16 parts, PIC18 devices add a hardware multiplier, extended instruction set, larger linear addressing (up to 2 MB), priority interrupts, and peripheral-rich variants like the F458 with integrated CAN.
Key features include a 10-bit ADC with up to 8 channels, two 8-bit and three 16-bit timers, two capture/compare/PWM (CCP) modules plus one enhanced CCP, an addressable USART, MSSP (I2C/SPI), and a CAN 2.0B controller compliant with CAN 2.0A/B active or passive. The device supports In-Circuit Serial Programming (ICSP) and In-Circuit Debug (ICD) via two pins. Self-programmability under firmware control is supported through a dedicated boot block.
Typical applications include automotive body and chassis ECUs, industrial CAN-bus nodes, sensor aggregation gateways, HVAC controls, and small automation PLCs. The on-chip CAN module eliminates an external controller, reducing BOM and improving EMI immunity for in-vehicle networks.
When designing, ensure the extended temperature grade (-40C to +125C) is suitable for your thermal envelope; for lower-temperature commercial designs the PIC18F458-I variant is preferred. Decouple VDD/VSS with 100 nF + bulk capacitance near the pins, and follow Microchip's TQFP-44 thermal layout guidance when operating at sustained 40 MHz.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that complement (and do not replace) the manufacturer datasheet referenced below.
直接替换替代料： PIC18F458-E/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： PIC18F458-E/PT （相同外形与封装尺寸） ——差异在于 Package, ADC, Operating Temperature, I/O Pins, RAM.
快速对比工具——选择替代料号进行并排对比：
PIC18F458-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F448-E/PT
✅ 直接替换✓ 有现货
$4.65 / 个
查看数据手册 →PIC18F4580-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F4580-E/PT
✅ 直接替换✓ 有现货
$3.21 / 个
查看数据手册 →PIC18F4585-I/PT
✅ 直接替换✓ 有现货
$5.73 / 个
查看数据手册 →PIC18F4480-I/PT
✅ 直接替换✓ 有现货
$4.85 / 个
查看数据手册 →PIC18F458-E/PT 最大额定值与电气特性
| Core Architecture | 8-bit PIC18 RISC, 16-bit instruction word |
| Program Flash | 32 KB (16K x 16) |
| RAM | 1.5 KB (1536 bytes) |
| EEPROM | 256 bytes |
| 最大时钟频率 | 40 MHz (10 MIPS) |
| Operating Voltage | 4.5 V to 5.5 V |
| I/O Pins | 34 |
| ADC | 10-bit, up to 8 channels |
| Timers | 2 x 8-bit + 3 x 16-bit |
| Capture/Compare/PWM | 2 CCP + 1 ECCP |
| Communication | CAN 2.0B, UART/USART, I2C, SPI |
| CAN Module | 1 x CAN 2.0B (active/passive) |
| 封装 | 44-pin TQFP (PT), 10x10 mm |
| 工作温度 | -40 C to +125 C (Extended, 'E') |
| 安装类型 | Surface Mount |
PIC18F458-E/PT 引脚配置
| 引脚 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 引脚 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| 引脚 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| 引脚 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| 引脚 8 | RE0/RD/AN5 — PORTE bit 0 / parallel port read / analog input 5 |
| 引脚 9 | RE1/WR/AN6 — PORTE bit 1 / parallel port write / analog input 6 |
| 引脚 10 | RE2/CS/AN7 — PORTE bit 2 / parallel port chip select / analog input 7 |
| 引脚 11 | VDD — Digital supply voltage (+5V) |
| 引脚 12 | VSS — Digital ground |
| 引脚 13 | OSC1/CLKI/RA7 — Oscillator input / external clock / PORTA bit 7 |
| 引脚 14 | OSC2/CLKO/RA6 — Oscillator output / clock output / PORTA bit 6 |
| 引脚 15 | RC0/T1OSO/T12CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock |
| 引脚 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| 引脚 17 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| 引脚 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| 引脚 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| 引脚 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| 引脚 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| 引脚 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 25 | RC6/TX/CK — PORTC bit 6 / USART transmit / clock |
| 引脚 26 | RC7/RX/DT — PORTC bit 7 / USART receive / data |
| 引脚 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| 引脚 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| 引脚 29 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| 引脚 30 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| 引脚 31 | VSS — Digital ground |
| 引脚 32 | VDD — Digital supply voltage (+5V) |
| 引脚 33 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| 引脚 34 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| 引脚 35 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| 引脚 36 | RB3/CCP2A — PORTB bit 3 / CCP2 alternate |
| 引脚 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| 引脚 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| 引脚 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 引脚 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| 引脚 41 | NC — Not connected (per datasheet) |
| 引脚 42 | NC — Not connected (per datasheet) |
| 引脚 43 | CANTX — CAN transmit output (alternate mapping) |
| 引脚 44 | CANRX — CAN receive input (alternate mapping) |
典型应用
PIC18F458-E/PT 适用于 7 应用s: Automotive Body and Chassis ECU, Industrial CAN-Node Aggregation, HVAC and Building Automation Controller, Sensor Gateway / Edge Concentrator, Small Automation PLC / Relay Logic Replacement, Medical Monitoring Peripheral, Aerospace Avionics Bus Node.
Automotive Body and Chassis ECU
The PIC18F458-E/PT's integrated CAN 2.0B controller and -40 C to +125 C extended temperature grade make it a fit for body and chassis ECUs. Why: deterministic CAN message handling without an external controller reduces BOM and EMI surface. How: firmware runs at 10 MIPS from a 40 MHz oscillator, with CAN interrupt servicing shared alongside ADC sampling of sensor inputs (temperature, position). Compared with a discrete MCU+CAN solution, the PIC18F458-E/PT consolidates two ICs into one and lowers quiescent draw in sleep modes via nanoWatt-style idle instructions.
推荐
Industrial CAN-Node Aggregation
Industrial CANopen or DeviceNet nodes aggregate sensor data and forward it to a PLC. Why: the PIC18F458-E/PT's 32 KB Flash accommodates a CANopen stack plus application code, while 1.5 KB RAM buffers incoming PDOs. How: place the MCU on a 5 V rail with the MCP2551 CAN transceiver on the bus side; the integrated hardware CAN module handles bit-stuffing and CRC without CPU intervention, freeing the core for sensor I/O. Per the manufacturer datasheet, the MSSP also supports SPI sensors in parallel.
推荐
HVAC and Building Automation Controller
The PIC18F458-E/PT suits HVAC controllers driving fans, valves, and dampers via CAN or UART links to a building management system. Why: 34 I/O pins drive multiple triac outputs, while two CCP modules generate PWM for variable-speed fans; 10-bit ADC reads temperature and pressure sensors. How: a typical design uses PORTA for analog inputs, PORTB for keypad, and PORTC for the CAN bus; firmware implements Modbus/CANopen bridging. The 40 MHz core ensures the control loop stays well under 10 ms even with networking overhead.
推荐
Sensor Gateway / Edge Concentrator
Use the PIC18F458-E/PT as an edge gateway that aggregates multiple SPI/I2C sensors onto a CAN backbone. Why: the MSSP supports both I2C and SPI simultaneously, while hardware CAN transmits upstream; 1.5 KB RAM buffers sensor bursts. How: firmware polls sensor slaves at 100 Hz over I2C, packages readings into CAN IDs, and broadcasts every 10 ms. The extended temperature grade allows outdoor cabinet placement; the 256-byte EEPROM stores calibration constants without external memory.
推荐
Small Automation PLC / Relay Logic Replacement
For small automation PLCs replacing legacy relay logic, the PIC18F458-E/PT's 34 digital I/O and 16-bit timers handle multiple discrete signals and PWM outputs. Why: deterministic interrupt latency from the priority interrupt controller ensures scan-time stability; CAN bus links to a master controller or HMI. How: ladder-style firmware scans inputs, evaluates logic, and updates outputs in <5 ms scan cycles; the CAN module provides deterministic peer-to-peer messaging across the cell.
推荐
Medical Monitoring Peripheral
Battery or line-powered medical peripherals (e.g., patient monitors, infusion pump sub-systems) use the PIC18F458-E/PT to collect sensor data and forward it over CAN to a host display. Why: the deterministic CAN bus is well-suited to medical device networks, and the extended temperature range supports hospital and home environments. How: a 10-bit ADC samples physiological signals, while the CAN module broadcasts real-time updates; firmware in 32 KB Flash implements safety checks and watchdog logic. The wide 4.5-5.5 V supply tolerance accommodates linear regulator outputs directly.
推荐
Aerospace Avionics Bus Node
Avionics subsystems use the PIC18F458-E/PT as a low-cost CAN bus node for non-flight-critical subsystems (cabin pressure, lighting, galley controls). Why: hardware CAN 2.0B with active or passive modes supports standard aerospace CAN databuses, while the -40 C to +125 C grade covers avionics bay temperatures. How: firmware listens for specific CAN IDs and toggles actuator outputs; CCP modules drive PWM for dimming and valve control. Compliance to DO-160 environmental conditions is verified at the system level, not by the MCU alone.
推荐
推荐产品汇总
工程参考数据： PIC18F458-E/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 | PIC18F458-I/PT | PIC18F448-E/PT | PIC18F4580-I/PT | PIC18F4585-I/PT | PIC18F4480-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-pin TQFP (PT) 10x10 mm | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Flash | 32 KB | 32 KB | 16 KB | 32 KB | 48 KB | 16 KB |
| RAM | 1.5 KB | 1.5 KB | 768 B | 1.5 KB | 3.3 KB | 768 B |
| Max Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| CAN 2.0B Module | Yes | Yes | Yes | Yes | Yes | Yes |
| Temperature Grade | Extended -40 to +125 C | Industrial -40 to +85 C | Extended -40 to +125 C | Industrial -40 to +85 C | Industrial -40 to +85 C | Industrial -40 to +85 C |
| ADC | 10-bit, 8 ch | 10-bit, 8 ch | 10-bit, 8 ch | 10-bit, 11 ch | 10/12-bit, 11 ch | 10-bit, 11 ch |
| nanoWatt XLP Low Power | No | No | No | Yes | Yes | Yes |
关键差异点
- Integrated CAN 2.0B controller on-chip （对比 PIC18F452-I/PT)
- Higher memory capacity within the same TQFP-44 footprint （对比 PIC18F448-E/PT)
- Pin-compatible upgrade path to nanoWatt XLP devices （对比 PIC18F4580-E/PT)
- Extended temperature grade for harsh environments （对比 PIC18F458-I/PT)
设计说明
The PIC18F458-E/PT operates from a 4.5-5.5 V single supply. Place a 100 nF decoupling capacitor as close as possible to each VDD/VSS pair (pins 11/12 and 31/32 on TQFP-44), plus a bulk 10 uF tantalum or ceramic on the rail. Estimated: with all peripherals active and 40 MHz oscillator, IDD can reach ~25 mA; use a regulator rated for at least 1.5x headroom to prevent brown-out during CAN transmit bursts. A 10 kHz decoupling cap on AVdd/AVss further reduces ADC noise.
Pin 1 (MCLR/VPP) requires proper handling to avoid unintended resets. Tie MCLR to VDD through a 10 kohm pull-up resistor and route the ICSP/ICD connector through isolation resistors (typically 4.7 kohm) per Microchip's debugger documentation. Do not leave MCLR floating; floating MCLR is the most common cause of erratic behavior on PIC18F designs. If using the internal weak pull-up, ensure no in-circuit programmer will be attached during field operation.
The TQFP-44 package has 0.8 mm pitch and exposed thermal pad. Maintain 0.4 mm trace/space rules and a continuous ground plane on the layer immediately beneath the device. For high-noise CAN environments, place the MCP2551 (or equivalent) CAN transceiver within 25 mm of the CANTX/CANRX pins, route the bus differentially with 120 ohm characteristic impedance, and add TVS protection (e.g., SMBJ24CA) at the bus connector.
Estimated: at 40 MHz and full I/O switching, internal dissipation stays below 200 mW and self-heating is negligible on a properly laid-out PCB. In an enclosed automotive junction box at +85 C ambient with no airflow, however, the junction-to-ambient thermal resistance of approximately 50 C/W yields a Tj rise of about 10 C - well within the 125 C limit. Add thermal vias beneath the exposed pad if the device is operated in a sealed enclosure.
The PIC18F458-E/PT's integrated CAN module requires a clean oscillator reference; jitter above +/- 2% on the CAN clock source can cause bit-timing violations and bus errors. Use a high-stability crystal or resonator with appropriate load capacitors (per crystal vendor specs, typically 15-33 pF). For low-EMI designs, enable the CAN module's silent/loopback modes during development to validate firmware without driving the physical bus.
合规信息
RoHS/REACH status not explicitly stated in the verified data; lead-free per Microchip modern product line. AEC-Q100 qualification available for 'E' (extended) automotive variants per manufacturer datasheet.