PIC18LF458T-I/PT - 8-bit 40MHz 32KB Flash CAN MCU | Microchip
MPN: PIC18LF458T-I/PT ✓ فعالPIC18LF458T-I/PT نمای کلی
A PIC18 microcontroller is a member of Microchip's 8-bit PIC (Peripheral Interface Controller) family, which combines a RISC-based CPU core with on-chip FLASH, SRAM, EEPROM and a rich peripheral set in a single CMOS IC. Within the broader taxonomy, the PIC18 sits between the legacy PIC16 mid-range line and the high-performance dsPIC DSC family. PIC18F devices are the de-facto choice for cost-sensitive embedded control with deterministic interrupt latency and instruction-set compatibility across pin counts.
Key features include hardware CAN 2.0B with acceptance filters, an Enhanced USART supporting RS-232/RS-485, a Master I2C/SPI port, a 10-bit 8-channel ADC, four timer modules, two PWM/CCP modules and a 10 MIPS execution rate from a 40MHz oscillator. The 10x10mm TQFP-44 footprint exposes 33 digital I/O lines and the full peripheral set, making the part attractive for board-space constrained industrial nodes.
Architecturally, the device uses a 16-bit instruction word with an 8-bit data path, 31-level hardware stack and DC-to-40MHz oscillator with PLL options. The CAN engine implements CAN 2.0B active with six acceptance masks/filters, offloading bus arbitration from the CPU and preserving 10 MIPS bandwidth for application code.
Typical applications include industrial CAN nodes (sensor/actuator hubs, motor drives), automotive body electronics, building automation, medical instrumentation telemetry, and any 5V-tolerant embedded control network requiring deterministic on-chip CAN. The wide 2.0V-5.5V supply range also supports battery-powered field nodes.
When designing with this part, plan for proper decoupling (100nF plus 10uF bulk near VDD/AVDD/VSS), use the MSSP module in I2C mode carefully for bus arbitration, and configure the CAN bit-timing per CiA-recommended values for the chosen bus baud. The "I" suffix confirms the -40C to +85C industrial operating range.
This page synthesizes distributor pricing, drop-in alternatives and practical design notes not found in the standalone manufacturer datasheet.
جایگزین‌های drop-in برای PIC18LF458T-I/PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC18LF458T-I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در ADC, Package, Operating Temperature, I/O Pins, Timers.
PIC18LF458-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F458T-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF448T-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF4580T-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF452-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF442-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF458T-I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Manufacturer | Microchip Technology |
| Series | PIC 18F |
| Core | PIC18 (8-bit RISC) |
| Core Size | 8-bit |
| حداکثر فرکانس کلاک | 40 MHz |
| Program Memory Size | 32 KB (16K x 16) FLASH |
| RAM Size | 1.5 KB |
| EEPROM Size | 256 bytes |
| عرض گذرگاه داده | 8 bit |
| Number of I/O Pins | 33 |
| ADC Resolution | 10-bit, 8 channels |
| Supply Voltage Range | 2.0 V to 5.5 V |
| محدوده دمای کاری | -40 C to +85 C (Industrial) |
| سبک نصب | SMD/SMT |
| بسته‌بندی / کیس | 44-TQFP (10x10 mm) |
| Connectivity | CAN 2.0B, I2C, SPI, UART/USART |
| Packaging | Reel (Tape & Reel) |
| وضعیت RoHS | Compliant |
پیکربندی پین PIC18LF458T-I/PT
| پین 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| پین 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| پین 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| پین 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| پین 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| پین 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| پین 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| پین 8 | RE0/RD/AN5 — PORTE bit 0 / RD control / analog input 5 |
| پین 9 | RE1/WR/AN6 — PORTE bit 1 / WR control / analog input 6 |
| پین 10 | RE2/CS/AN7 — PORTE bit 2 / CS control / analog input 7 |
| پین 11 | VDD — Positive supply (2.0V-5.5V) |
| پین 12 | VSS — Ground reference |
| پین 13 | OSC1/CLKI — Crystal oscillator input / external clock |
| پین 14 | OSC2/CLKO — Crystal oscillator output / clock out |
| پین 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / T1 clock in |
| پین 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| پین 17 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| پین 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| پین 19 | RD0/C1IN+ — PORTD bit 0 / CAN1 TX (C1IN+) |
| پین 20 | RD1/C1IN- — PORTD bit 1 / CAN1 RX (C1IN-) |
| پین 21 | RD2/C2IN+ — PORTD bit 2 / CAN2 TX |
| پین 22 | RD3/C2IN- — PORTD bit 3 / CAN2 RX |
| پین 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| پین 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| پین 25 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| پین 26 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| پین 27 | RD4 — PORTD bit 4 |
| پین 28 | RD5 — PORTD bit 5 |
| پین 29 | RD6 — PORTD bit 6 |
| پین 30 | RD7 — PORTD bit 7 |
| پین 31 | VSS — Ground reference |
| پین 32 | VDD — Positive supply (2.0V-5.5V) |
| پین 33 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| پین 34 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| پین 35 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| پین 36 | RB3/INT3/CCP2 — PORTB bit 3 / external interrupt 3 / CCP2 |
| پین 37 | RB4 — PORTB bit 4 |
| پین 38 | RB5 — PORTB bit 5 |
| پین 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پین 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| پین 41 | AVDD — Analog positive supply |
| پین 42 | AVSS — Analog ground |
| پین 43 | RA6 — PORTA bit 6 |
| پین 44 | RA7 — PORTA bit 7 |
کاربردهای معمول
PIC18LF458T-I/PT مناسب است برای 6 کاربردs: Industrial CAN Node / Fieldbus Sensor Hub, Automotive Body Electronics / Gateway Node, Building Automation / HVAC Controller, Medical Instrumentation Telemetry, Motor Control / BLDC Driver Board, Embedded Industrial Control / PLC Slice.
Industrial CAN Node / Fieldbus Sensor Hub
The PIC18LF458T-I/PT is purpose-built for 5V industrial CAN nodes thanks to its integrated CAN 2.0B active controller with 6 acceptance masks and 1 Mb/s bus capability. Its 32 KB flash comfortably fits CiA 401/402/406 device profiles for generic I/O modules, while the 1.5 KB SRAM supports PDO buffering at 1 ms cycle time. The 10-bit 8-channel ADC directly interfaces 4-20 mA loop sensors with internal scaling, and the 2.0-5.5V range rides out supply transients on 24V-backplane industrial nodes. Placed between a CAN transceiver (e.g. MCP2551) and field I/O, it offers far lower BOM cost than 32-bit Cortex-M alternatives while delivering the deterministic interrupt latency industrial protocols require.
پیشنهادی
Automotive Body Electronics / Gateway Node
In automotive body and gateway applications the PIC18LF458T-I/PT provides the CAN backbone for door modules, seat controllers and body control units. Its hardware CAN 2.0B offloads bus arbitration from the CPU so the 10 MIPS core can handle LIN slaves via UART, switch inputs via the 33 I/O lines, and PWM-controlled lighting. The -40C to +85C industrial grade covers cabin environments, while the 44-TQFP footprint suits through-hole-replacement reflow designs. For under-hood or AEC-Q100 qualified designs, designers should migrate to PIC18F458T-I/PT or PIC18F258-I/SO equivalent parts, but for non-safety cabin electronics this "LF" part is a cost-effective choice.
پیشنهادی
Building Automation / HVAC Controller
Building automation controllers rely on the PIC18LF458T-I/PT for BACnet MS/TP or proprietary RS-485 sub-bus communication via the enhanced USART, plus 4-20 mA analog loop-back power inputs through the 8-channel 10-bit ADC. The 32 KB flash holds BACnet object dictionaries and scheduling logic; the 256-byte EEPROM stores non-volatile setpoints that survive power loss. Low-voltage 2.0V operation enables backup-battery takeover during mains brown-out, while the industrial -40C to +85C range supports unheated plant rooms. Compared with discrete 8051 implementations, the integrated CAN, I2C and SPI peripherals drastically reduce external logic and BOM.
پیشنهادی
Medical Instrumentation Telemetry
Portable medical instruments benefit from the PIC18LF458T-I/PT's low-voltage 2.0V operation, which extends battery life in hand-held patient monitors and telemetry patches. The 10-bit ADC digitizes sensor signals (pulse oximetry, temperature, ECG pre-amp outputs) with adequate resolution for trend monitoring, while the integrated CAN/USART provides wired telemetry back to a bedside monitor. The 32 KB flash stores calibration coefficients and protocol stacks. Designers should note this part is industrial-grade (-40C to +85C), not medical-AEC-Q100 qualified; for FDA-class-II devices, additional component qualification is required.
پیشنهادی
Motor Control / BLDC Driver Board
The PIC18LF458T-I/PT drives small BLDC and stepper motors via its two CCP/PWM modules and four timers, while the CAN peripheral reports rotor position back to a centralized controller. The 32 KB flash holds sensorless back-EMF or Hall-sensor commutation tables, and the 10-bit ADC samples phase currents for closed-loop torque control. The 2.0-5.5V operating range simplifies integration with 3.3V gate drivers and 5V H-bridges alike. Note that for high-current industrial servo drives, designers typically pair this MCU with external gate drivers and current-sense amplifiers.
پیشنهادی
Embedded Industrial Control / PLC Slice
As a discrete PLC slice, the PIC18LF458T-I/PT offers 33 I/O lines for digital inputs (opto-isolated 24V) and outputs (relay/SSR drivers), plus CAN master connectivity to a higher-level controller. The 32 KB flash supports ladder-logic interpretation or IEC 61131-3 runtime, while the 1.5 KB SRAM handles I/O image tables. The 44-TQFP industrial package survives factory-floor thermal cycling (-40C to +85C). Compared with purpose-built PLC ASICs, this approach reduces NRE cost for low-volume industrial machinery.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18LF458T-I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18LF458-I/PT | PIC18F458T-I/PT | PIC18LF448T-I/PT | PIC18LF4580T-I/PT | PIC18LF452-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Architecture | PIC18 8-bit 40 MHz | PIC18 8-bit 40 MHz | PIC18 8-bit 40 MHz | PIC18 8-bit 40 MHz | PIC18 8-bit 40 MHz | PIC18 8-bit 40 MHz |
| Program Memory | 32 KB FLASH | 32 KB FLASH | 32 KB FLASH | 16 KB FLASH | 32 KB FLASH | 32 KB FLASH |
| RAM | 1.5 KB | 1.5 KB | 1.5 KB | 768 B | 1.5 KB | 1.5 KB |
| CAN 2.0B Controller | Yes (1x) | Yes | Yes | Yes | Yes | No |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
تفاوت‌های کلیدی
- Integrated CAN 2.0B with 6 acceptance masks (در مقابلPIC18LF452-I/PT)
- Low-voltage 2.0 V-5.5 V operation (در مقابلPIC18F458T-I/PT)
- 32 KB flash plus 1.5 KB SRAM + 256 B EEPROM (در مقابلPIC18LF448T-I/PT)
یادداشت‌های طراحی
Estimated: at 40 MHz clock and 5.5 V VDD, the PIC18LF458T-I/PT core draws roughly 10-15 mA active. Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD/AVDD pin and a shared 10 uF bulk tantalum or ceramic near the package. Use separate analog and digital ground returns joined at a single point under the MCU to keep ADC noise below 1 LSB at 10-bit resolution.
Route the 40 MHz crystal traces short and symmetric, guard them with a ground pour, and place loading capacitors within 3 mm of OSC1/OSC2. The CAN TX/RX pins (RD0/RD1) should be routed as a matched differential pair with 100 ohm characteristic impedance and kept under 50 mm, terminating at the MCP2551 transceiver. The ICSP pins (RB6/RB7) must remain accessible for in-circuit programming - do not place loading components that exceed 50 pF on these lines.
A common pitfall is using the PIC18LF458T-I/PT at 3.3 V but substituting with the PIC18F458T-I/PT (4.2 V minimum) - the latter will fail to start reliably below 4.0 V at cold temperature. Another pitfall is forgetting to configure the A/D converter's acquisition time (ACQT) and conversion clock (ADCS) for the chosen impedance source; an under-sized ACQT causes the ADC to read non-monotonic values on high-impedance sensor inputs.
اطلاعات انطباق
RoHS compliant per Microchip product declaration; Pb-free and halogen-free mold compound; not AEC-Q100 qualified (industrial grade only - migrate to PIC18F458T-I/PT equivalent for AEC-Q100).