PIC18LF458T-I/L - 8-bit MCU 40MHz 32KB Flash w/ CAN 44-PLCC | Microchip
MPN: PIC18LF458T-I/L ✓ Hoạt độngPIC18LF458T-I/L Tóm tắt
A PIC18 microcontroller belongs to Microchip's enhanced 8-bit PIC family - an 8-bit MCU category that sits between simple 8051 cores and 16/32-bit ARM Cortex-M devices in the embedded hierarchy (PIC18 -> PIC microcontrollers -> 8-bit MCU -> microcontroller -> embedded processor). The 'LF' suffix denotes the low-voltage Flash variant designed for 2.0 V operation, while the 'F458' device integrates the CAN protocol engine that distinguishes it from the non-CAN PIC18F452. The 'T' suffix indicates Tape & Reel packaging, and 'I/L' specifies the industrial temperature range in PLCC.
Key features include 32 KB self-programmable Flash, 1.5 KB SRAM, 256 B EEPROM, 33 digital I/O pins, two analog comparators, two 8/16-bit timer/counters, three 16-bit capture/compare/PWM modules, an 8-channel 10-bit ADC, and an ECAN module supporting CAN 2.0B active/passive. An 8x8 hardware multiplier and a 16-bit instruction path deliver up to 10 MIPS at 40 MHz, while nanoWatt technology with multiple idle/sleep modes enables battery-friendly operation.
The architecture combines a 16-bit instruction word with an 8-bit data path, supports linear program memory addressing up to 2 MB via PSV, and includes prioritized interrupts, hardware stack, and a 4-deep FIFO on the MSSP SPI channel. Self-programmability in the Flash variant makes in-field firmware upgrades practical without external boot memory.
Typical applications include industrial CAN nodes (sensors, motor controllers, building automation), automotive body/comfort modules, HVAC controls, and embedded control boards that require a networkable 8-bit controller with mixed-signal I/O. The wide 2.0-5.5 V range allows direct connection to both 3.3 V and 5 V rails commonly found on legacy industrial backplanes.
When designing with the PLCC-44 variant, allocate a socket or rework allowance for field replacement, observe the parallel master port pin sharing rules during ISP, and place a 0.1 uF ceramic bypass capacitor adjacent to every VDD/VSS pair to keep the internal PLL and CAN transceiver logic quiet. The 'T' suffix denotes Tape & Reel packaging for automated assembly, but engineers typically hand-socket this through-hole-style PLCC part during prototyping.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF458T-I/L — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF458T-I/L (cùng hình factor và footprint) — khác nhau ở ADC, Package, Mounting Type, Operating Temperature, Program Memory (Flash).
PIC18LF458-I/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF452-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF448T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF458T-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF4580T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF458T-I/PTG
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF458T-I/L Tỷ lệ tối đa & tính chất điện
| Core | PIC18 (8-bit Harvard RISC) |
| Instruction Set Width | 16-bit instructions, 8-bit data path |
| Max CPU Clock | 40 MHz |
| MIPS (peak) | 10 MIPS |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 1.5 KB (1536 B) |
| Data EEPROM | 256 B |
| Supply Voltage (Vdd) | 2.0 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| I/O Pins | 33 |
| ADC | 8 x 10-bit |
| Comparators | 2 |
| Timers (8-bit/16-bit) | 2 x 8/16-bit + 3 x CCP (16-bit) |
| Communication | ECAN 2.0B, I2C, SPI, USART |
| Hộp | 44-PLCC (J-Lead), 16.59 x 16.59 mm |
| Kiểu lắp đặt | Surface Mount (PLCC socket or direct) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF458T-I/L
| Chân 1 | MCLR — Master Clear (reset) input, active low |
| Chân 2 | RA0/AN0 — Digital I/O / Analog input 0 |
| Chân 3 | RA1/AN1 — Digital I/O / Analog input 1 |
| Chân 4 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / ADC VREF- |
| Chân 5 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC VREF+ |
| Chân 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — Digital I/O / Analog input 4 / SPI slave select |
| Chân 8 | RE0/RD — Digital I/O / Parallel master port read |
| Chân 9 | RE1/WR — Digital I/O / Parallel master port write |
| Chân 10 | RE2/CS — Digital I/O / Parallel master port chip select |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | VSS — Ground reference |
| Chân 13 | OSC1/CLKI — Oscillator crystal input / external clock |
| Chân 14 | OSC2/CLKO — Oscillator crystal output / clock out |
| Chân 15 | RC0/T1OSO — Digital I/O / Timer1 oscillator output |
| Chân 16 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| Chân 17 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| Chân 18 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Chân 19 | RD0/CANTX — Digital I/O / CAN bus transmit |
| Chân 20 | RD1/CANRX — Digital I/O / CAN bus receive |
| Chân 21 | RD2 — Digital I/O |
| Chân 22 | RD3 — Digital I/O |
| Chân 23 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Chân 24 | RC5/SDO — Digital I/O / SPI data out |
| Chân 25 | RC6/TX/CK — Digital I/O / USART async transmit / clock |
| Chân 26 | RC7/RX/DT — Digital I/O / USART async receive / data |
| Chân 27 | RD4 — Digital I/O |
| Chân 28 | RD5 — Digital I/O |
| Chân 29 | RD6 — Digital I/O |
| Chân 30 | RD7 — Digital I/O |
| Chân 31 | VSS — Ground reference |
| Chân 32 | VDD — Positive supply voltage |
| Chân 33 | RB0/INT0 — Digital I/O / External interrupt 0 |
| Chân 34 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Chân 35 | RB2/INT2 — Digital I/O / External interrupt 2 |
| Chân 36 | RB3/CCP2 — Digital I/O / CCP2 alternate |
| Chân 37 | RB4 — Digital I/O |
| Chân 38 | RB5 — Digital I/O |
| Chân 39 | RB6/PGC — Digital I/O / ICSP clock |
| Chân 40 | RB7/PGD — Digital I/O / ICSP data |
| Chân 41 | AVSS — Analog ground |
| Chân 42 | AVDD — Analog positive supply |
| Chân 43 | VSS — Ground reference |
| Chân 44 | VDD — Positive supply voltage |
Ứng dụng tiêu biểu
PIC18LF458T-I/L phù hợp cho 7 Áp dụngs: Industrial CAN Node / Sensor Interface, Automotive Body & Comfort Module, HVAC Control Board, Building Automation & Lighting Control, Motor Control & PWM Drive, Industrial Instrumentation & Data Acquisition, Embedded Control Training & Prototyping Platform.
Industrial CAN Node / Sensor Interface
The PIC18LF458T-I/L's integrated ECAN 2.0B controller makes it a direct fit for industrial CAN nodes such as distributed sensors, actuators, and remote I/O modules on CANopen or DeviceNet backbones. The 32 KB Flash handles full CANopen CiA-401 device profiles, while 1.5 KB SRAM buffers PDO messages before forwarding to the application layer. The 8-channel 10-bit ADC reads analog sensor inputs (temperature, pressure, 4-20 mA loop shunts) with 1 LSB = 4.88 mV at 5 V reference, well above typical sensor noise floors. The 2.0-5.5 V range lets a single board accept either 3.3 V or 24 V-derived CAN supply without level shifting.
Được đề xuất
Automotive Body & Comfort Module
The PIC18LF458T-I/L is a long-standing choice for 12 V automotive body modules - door lock controllers, seat position memory, mirror adjustment, and interior lighting nodes - because its 2.0-5.5 V range survives cranking transients after a simple LDO, and the ECAN controller talks directly to the vehicle CAN bus. The 33 I/O pins are sufficient for relay drivers, switch matrix scanning, and PWM-controlled mirror/seat motors via the three 16-bit CCP modules. Industrial -40 to +85 C temperature grade covers cabin environments, and the 1.5 KB RAM absorbs LIN-to-CAN gateway buffering.
Được đề xuất
HVAC Control Board
HVAC control boards for residential and light-commercial equipment rely on the PIC18LF458T-I/L for mixed-signal I/O: the 8-channel 10-bit ADC reads thermistor temperature sensors, the two analog comparators detect zero-crossing on 24 V AC line voltage for triac timing, and the 16-bit CCP modules generate PWM outputs for fan speed and damper motor control. The ECAN block enables the board to join a building automation network for centralized scheduling and remote diagnostics. With 32 KB Flash, full Modbus or CANopen stack fits alongside the application firmware.
Được đề xuất
Building Automation & Lighting Control
DALI, KNX, and BACnet building-automation nodes often use the PIC18LF458T-I/L as a sub-controller bridging a sensor network to a CAN-based backbone. The ECAN module provides robust multi-drop communication across long cable runs in commercial buildings, while the 33 I/O pins drive LED dimmers, occupancy sensors, and relay outputs. The PIC18 nanoWatt sleep modes (down to nanoampere-level idle current) suit battery-backed wireless sensor nodes that wake periodically to push telemetry over CAN.
Được đề xuất
Motor Control & PWM Drive
The PIC18LF458T-I/L drives brushed DC motors, small BLDC fans, and stepper motors via its three 16-bit Capture/Compare/PWM modules, which deliver precise PWM up to 40 MHz time-base resolution. The 8-channel 10-bit ADC samples back-EMF or current-sense shunt voltage for closed-loop speed/torque control, while the ECAN controller reports motor status to a central PLC. The industrial temperature grade supports factory-floor enclosures, and the 2.0-5.5 V range tolerates motor-supply droop during stall events.
Được đề xuất
Industrial Instrumentation & Data Acquisition
Process-control and instrumentation front-ends use the PIC18LF458T-I/L to digitize 4-20 mA analog inputs at up to 8 channels (10-bit resolution), buffer samples in the 1.5 KB SRAM, and forward results over CAN to a SCADA host. The 32 KB Flash holds calibration constants, linearization lookup tables, and Modbus/CANopen protocol stacks. The wide 2.0-5.5 V supply tolerance supports loop-powered 24 V field instrumentation with internal LDO regulation.
Được đề xuất
Embedded Control Training & Prototyping Platform
Universities and design labs favor the PIC18LF458T-I/L for CAN-bus protocol coursework and embedded-control labs because the PLCC-44 form factor accepts a ZIF socket for easy firmware swapping during student sessions. The 32 KB Flash is large enough for full CANopen or DeviceNet stacks, and MPLAB X IDE + XC8 compiler support is mature. The industrial -40 to +85 C grade lets the same platform serve both indoor coursework and outdoor field demonstrations.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF458T-I/L — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18LF458-I/L | PIC18LF452-I/L | PIC18LF448T-I/PT | PIC18LF458T-I/PT | PIC18LF4580T-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-TQFP (PT) - different | 44-TQFP (PT) - different | 44-TQFP (PT) - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 (8-bit, 40 MHz) | PIC18 (8-bit, 40 MHz) - same | PIC18 (8-bit, 40 MHz) - same | PIC18 (8-bit, 40 MHz) - same | PIC18 (8-bit, 40 MHz) - same | PIC18 (8-bit, 40 MHz) - same |
| Program Memory (Flash) | 32 KB | 32 KB - same | 32 KB - same | 16 KB - smaller | 32 KB - same | 32 KB - same |
| Data RAM | 1.5 KB | 1.5 KB - same | 1.5 KB - same | 768 B - smaller | 1.5 KB - same | 1.5 KB - same |
| CAN Module | ECAN 2.0B | ECAN 2.0B - same | None - missing | ECAN 2.0B - same | ECAN 2.0B - same | ECAN 2.0B - same |
| ADC | 8 ch x 10-bit | 8 ch x 10-bit - same | 8 ch x 10-bit - same | 8 ch x 10-bit - same | 8 ch x 10-bit - same | 8 ch x 10-bit - same |
| Operating 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 | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same |
| I/O Pins | 33 | 33 - same | 34 - similar | 32 - similar | 32 - similar | 32 - similar |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
Bảo phân biệt quan trọng
- Integrated Enhanced CAN 2.0B controller with 32 KB Flash (vsPIC18LF452-I/L)
- PLCC-44 J-lead package for socket-friendly prototyping (vsPIC18LF458T-I/PT)
- 2.0 V to 5.5 V wide supply range including 3.3 V-only rails (vsPIC18F458-I/L (standard 'F' variant))
Ghi chú thiết kế
Place a 0.1 uF ceramic bypass capacitor on each VDD/VSS pair within 5 mm of the IC pin, and a single 10 uF tantalum or aluminum bulk capacitor on the board's main 5 V rail. The PIC18LF458's ADC draws brief charge currents during conversion; without local bypassing the AVDD pin reference will sag by 1-2 LSB. For CAN bus applications, isolate the PIC's VDD from the MCP2551 transceiver's VCC with a ferrite bead to prevent bus-induced supply noise from coupling into the analog reference.
The 44-PLCC J-lead package accepts both through-hole sockets and surface-mount land patterns. For prototyping, use a low-profile PLCC-44 ZIF socket so the chip can be swapped without desoldering. For production, the PLCC J-leads can be hand-soldered or reflowed with a paste stencil - ensure the land pattern uses NSMD pads with 0.5 mm mask expansion. Keep all traces to the crystal oscillator pins (OSC1 / OSC2) under 10 mm in length and surround them with a ground pour to minimize EMI pickup.
Do not enable the on-chip ECAN module without first configuring the CAN I/O pins (CANTX on RD0, CANRX on RD1) as digital inputs; otherwise the CAN bus state during firmware initialization may emit a spurious frame. Also note the 'LF' low-voltage variant operates at full 40 MHz speed only above 4.2 V - below that the Fosc max is 4 MHz. Programming the CONFIG3H register with the wrong IRCFG bits is a common source of mysterious baud-rate errors at 3.3 V. Always re-verify Fosc vs VDD after configuration word changes.
The CAN bus pins (CANTX/CANRX) require a 100 ns propagation delay matching the ISO 11898 standard; do not add series resistors or filter capacitors on these lines because they violate the bus timing budget. Instead, place the MCP2551 transceiver within 50 mm of the PIC and use a twisted-pair bus cable (CANH/CANL) terminated with 120 ohms at each end. For long cables (>10 m) add a common-mode choke to suppress EMI without affecting the differential bus timing.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial temperature grade (-40 C to +85 C) only - no AEC-Q100 automotive qualification on the 'I/L' variant.
