PIC18LF458-I/PT - 8-bit MCU, 32KB Flash, CAN, 44-TQFP | Microchip
N.º de pieza: PIC18LF458-I/PT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $9.62 | $9,62 |
| 10 | $8.65 | $86,50 |
| 100 | $7.69 | $769,00 |
| 500 | $6.74 | $3.370,00 |
| 1.000 | $6.12 | $6.120,00 |
PIC18LF458-I/PT Descripción general
What is a PIC18F microcontroller? The PIC18F family is Microchip's high-performance 8-bit microcontroller line based on an enhanced Harvard RISC architecture. An 8-bit MCU executes instructions on 8-bit data words and is widely used in embedded control applications where deterministic timing, low power consumption, and integrated peripherals (ADC, timers, communication buses) outweigh the need for higher throughput. PIC18F sits above the PIC16F family in Microchip's portfolio and below the 16-bit dsPIC/PIC24 families, serving cost-sensitive industrial and automotive applications.
Key features include an extended instruction set, hardware multiplier, 13-bit program counter capable of addressing 8MB of linear program memory, and self-programming Flash. The PIC18LF458 (LF variant) operates across an extended voltage range suited for low-voltage designs and includes a 10-bit ADC with up to 8 channels. The device supports in-circuit debugging via ICSP and in-circuit serial programming, eliminating the need for external programmers in production.
Typical applications include industrial automation (CAN-based sensor nodes, motor controllers), automotive body electronics (CAN bus nodes, lighting controllers), and embedded control systems (sensor aggregation, simple HMI). The integrated CAN 2.0B controller makes the PIC18LF458 particularly well-suited for distributed control networks where the MCU acts as a node on a CAN bus. Brown-out detection, watchdog timer, and low-power Sleep mode enhance reliability in safety-conscious designs.
When designing with this device, choose the LF variant for 2.0-3.6V operation versus the standard F variant's 4.0-5.5V range. Ensure the oscillator configuration matches the application's EMI tolerance, as the integrated CAN controller requires stable clocking for reliable network communication.
Alternativas directas para PIC18LF458-I/PT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC18LF458-I/PT (mismo factor de forma y huella) — difiere en ADC, Package, Timers, Program Memory (Flash), Operating Temperature.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18F458-I/PT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18LF448-I/PT
✅ Sustitución directa✓ En stock
$2.95 / unidad
Ver hoja de datos →PIC18F448-I/PT
✅ Sustitución directa✓ En stock
$7.2 / unidad
Ver hoja de datos →PIC18LF4580-I/PT
✅ Sustitución directa✓ En stock
$5.65 / unidad
Ver hoja de datos →PIC18F4580-I/PT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18LF452-I/PT
✅ Sustitución directa✓ En stock
$5.04 / unidad
Ver hoja de datos →PIC18LF458-I/PT Valores máximos y características eléctricas
| Core | PIC 8-bit RISC |
| Program Memory | 32 KB (16K x 16) Flash |
| RAM | 1.5 KB (1536 bytes) |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Operating Voltage | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| ADC | 8-channel, 10-bit |
| Communication Interfaces | CAN 2.0B, UART/USART, SPI, I2C |
| Encapsulado | 44-TQFP (10x10 mm) |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | -40C to +85C (Industrial) |
| Instruction Set | 83 instructions (extended) |
| Timers | 4 (Timer0/1/2/3) |
| Brown-out Detect | Yes |
| Watchdog Timer | Yes (WDT) |
| ICSP Programming | Yes (In-Circuit Serial Programming) |
| Estado RoHS | Compliant |
Configuración de pines de PIC18LF458-I/PT
| Pin 1 | OSC2/CLKO/RA6 — Oscillator output / GPIO |
| Pin 2 | OSC1/CLKI/RA7 — Oscillator input / GPIO |
| Pin 3 | MCLR/VPP — Master Clear reset / programming voltage |
| Pin 4 | RA0/AN0 — GPIO / Analog input 0 |
| Pin 5 | RA1/AN1 — GPIO / Analog input 1 |
| Pin 6 | RA2/AN2/VREF- — GPIO / Analog input 2 / ADC VREF- |
| Pin 7 | RA3/AN3/VREF+ — GPIO / Analog input 3 / ADC VREF+ |
| Pin 8 | RA4/T0CKI — GPIO / Timer0 clock input |
| Pin 9 | RA5/AN4/SS — GPIO / Analog input 4 / SPI slave select |
| Pin 10 | VSS — Ground |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | RB0/INT0 — GPIO / External interrupt 0 |
| Pin 13 | RB1/INT1 — GPIO / External interrupt 1 |
| Pin 14 | RB2/INT2 — GPIO / External interrupt 2 |
| Pin 15 | RB3/CCP2 — GPIO / Capture/Compare/PWM 2 |
| Pin 16 | RB4 — GPIO |
| Pin 17 | RB5 — GPIO |
| Pin 18 | RB6/PGC — GPIO / ICSP clock |
| Pin 19 | RB7/PGD — GPIO / ICSP data |
| Pin 20 | VSS — Ground |
| Pin 21 | VDD — Positive supply voltage |
| Pin 22 | RC0/T1OSO/T1CKI — GPIO / Timer1 output / clock input |
| Pin 23 | RC1/T1OSI/CCP2 — GPIO / Timer1 oscillator input |
| Pin 24 | RC2/CCP1 — GPIO / Capture/Compare/PWM 1 |
| Pin 25 | RC3/SCK/SCL — GPIO / SPI clock / I2C clock |
| Pin 26 | RC4/SDI/SDA — GPIO / SPI data in / I2C data |
| Pin 27 | RC5/SDO — GPIO / SPI data out |
| Pin 28 | RC6/TX/CK — GPIO / USART TX / clock |
| Pin 29 | RC7/RX/DT — GPIO / USART RX / data |
| Pin 30 | VSS — Ground |
| Pin 31 | VDD — Positive supply voltage |
| Pin 32 | RD0 — GPIO |
| Pin 33 | RD1 — GPIO |
| Pin 34 | RD2 — GPIO |
| Pin 35 | RD3 — GPIO |
| Pin 36 | RD4 — GPIO |
| Pin 37 | RD5 — GPIO |
| Pin 38 | RD6 — GPIO |
| Pin 39 | RD7 — GPIO |
| Pin 40 | VSS — Ground |
| Pin 41 | VDD — Positive supply voltage |
| Pin 42 | RE0/RD/AN5 — GPIO / read control / Analog input 5 |
| Pin 43 | RE1/WR/AN6 — GPIO / write control / Analog input 6 |
| Pin 44 | RE2/CS/AN7 — GPIO / chip select / Analog input 7 |
Aplicaciones típicas
PIC18LF458-I/PT es adecuado para 6 aplicacións: Industrial CAN Bus Node, Automotive Body Electronics, Sensor Aggregation Hub, Motor Control Subsystem, Embedded Data Logger, Building Automation Controller.
Industrial CAN Bus Node
The PIC18LF458-I/PT serves as a low-cost CAN 2.0B node for industrial automation networks such as CANopen and DeviceNet segments. With its integrated CAN controller, 40 MHz CPU (10 MIPS), and 32KB Flash, it handles protocol stack processing while leaving headroom for application logic. The 2.0-5.5V operating range suits 3.3V industrial sensor nodes, and the 8-channel 10-bit ADC aggregates analog inputs from local sensors (temperature, pressure, current). Place termination resistors (120 ohm) per CAN bus design rules and use isolated CAN transceivers (e.g., MCP2551 or ISO1050) to improve noise immunity in factory environments.
Recomendado
Automotive Body Electronics
The PIC18LF458-I/PT powers body electronics modules such as lighting controllers, seat position nodes, HVAC actuators, and mirror controllers on a CAN bus. Its 34 I/O pins drive multiple LEDs, relays, and H-bridges directly via PWM, while the CAN 2.0B controller provides reliable network communication. The -40C to +85C industrial temperature range handles under-dash environments, and Brown-out Detect plus Watchdog Timer ensure recovery from automotive power transients. For AEC-Q100 applications, upgrade to the automotive-qualified variant; for non-safety body modules, the LF458-I/PT delivers cost-effective performance.
Recomendado
Sensor Aggregation Hub
The PIC18LF458-I/PT aggregates data from multiple sensors via I2C and SPI buses, processes the data locally, and reports via CAN or UART. Its 8-channel 10-bit ADC handles analog sensor inputs (temperature, pressure, voltage, current) at up to 10 ksps aggregate throughput, while the 32KB Flash stores calibration tables and protocol handlers. The LF variant's 2.0V minimum operation supports battery-powered sensor hubs with cell-voltage compatibility. Use the LF458's Sleep mode (under 1 uA typical) for battery-life extension in wireless sensor nodes with periodic wake-up.
Recomendado
Motor Control Subsystem
The PIC18LF458-I/PT drives BLDC, stepper, or brushed DC motors via PWM outputs and closed-loop control algorithms. Its 4 timers and Capture/Compare/PWM (CCP) modules generate complementary PWM signals with dead-band control for half-bridge drivers. The 32KB Flash stores field-oriented control (FOC) lookup tables and PI controller state variables, while the ADC samples phase currents at 10 ksps. The CAN bus interface enables coordinated multi-axis motion control in industrial automation systems, with the MCU acting as a per-axis controller reporting status to a master PLC.
Recomendado
Embedded Data Logger
The PIC18LF458-I/PT implements a portable data logger for industrial monitoring or environmental sensing, storing sensor readings to external EEPROM or Flash via SPI while providing local display and CAN output. Its 32KB Flash holds the FAT-style file system or simple record scheduler, and 1.5KB SRAM buffers sectors before write. The 256-byte internal EEPROM stores configuration parameters that survive power cycles, eliminating external EEPROM cost. The LF variant's 2.0V operation supports Li-coin cell backup, and Sleep mode extends battery life between logging events.
Recomendado
Building Automation Controller
The PIC18LF458-I/PT serves as a sub-controller in building automation networks, handling HVAC damper actuators, lighting zones, and occupancy sensors via CAN or RS-485. Its 34 I/O pins control multiple low-voltage relay outputs and read digital inputs from wall switches and motion sensors. The 10-bit ADC monitors 4-20 mA current loops from industrial sensors (CO2, humidity), while the USART interfaces with Modbus RTU or BACnet MS/TP networks. Industrial temperature rating (-40C to +85C) supports unconditioned mechanical-room deployment.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18LF458-I/PT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC18F458-I/PT | PIC18LF448-I/PT | PIC18F448-I/PT | PIC18LF4580-I/PT | PIC18LF452-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Operating Voltage | 2.0 V to 5.5 V | 4.0 V to 5.5 V | 2.0 V to 5.5 V | 4.0 V to 5.5 V | 2.0 V to 3.6 V | 2.0 V to 5.5 V |
| Flash Memory | 32 KB | 32 KB | 16 KB | 16 KB | 32 KB | 32 KB |
| RAM | 1.5 KB | 1.5 KB | 768 bytes | 768 bytes | 2 KB | 1.5 KB |
| CAN Controller | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | No (CAN-less variant) |
| ADC Channels | 8 channels x 10-bit | 8 channels x 10-bit | 8 channels x 10-bit | 8 channels x 10-bit | 12 channels x 10-bit | 8 channels x 10-bit |
| I/O Pins | 34 | 34 | 34 | 34 | 36 | 34 |
| AEC-Q100 Qualified | No (Industrial -40C to +85C) | Yes (automotive variant) | No | Yes (automotive variant) | No | No |
Diferenciadores clave
- Low-voltage operation down to 2.0V (frente a PIC18F458-I/PT)
- Full 32KB Flash for code-rich applications (frente a PIC18LF448-I/PT)
- CAN 2.0B integrated controller (frente a PIC18LF452-I/PT)
Notas de diseño
The PIC18LF458-I/PT operates from 2.0V to 5.5V. Place a 100 nF decoupling capacitor as close as possible to each VDD pin (4 VDD pins on the 44-TQFP) and a bulk 10 uF tantalum or ceramic capacitor at the power entry point. Add a ferrite bead in series with VDD if switching noise from external circuitry (e.g., a CAN bus) couples into the MCU supply. For battery-powered designs using the LF variant's 2.0V minimum, ensure the brown-out voltage is configured above the battery cutoff (typically 2.2V for single-cell Li coin cells).
Route the high-speed CAN TX/RX traces as a differential pair with 100-ohm controlled impedance on the PCB, keeping trace length under 50 mm to minimize reflections. Place the MCP2551 (or ISO1050 isolated) CAN transceiver within 25 mm of the MCU's CANTX/CANRX pins to keep stubs short. Use a 4-layer PCB with a dedicated ground plane for the analog section to isolate the ADC reference (VREF+/VREF-) from digital switching noise.
Do not confuse the LF (low-voltage 2.0-5.5V) variant with the F (standard 4.0-5.5V) variant - if your design uses a 3.3V regulator, only the LF variant will operate correctly. Always include proper termination (120 ohm) at both ends of the CAN bus, never in the middle. For ICSP programming, leave the RB6/PGC and RB7/PGD pins accessible on the PCB (test points or header) since in-circuit programming via these pins is essential for field firmware updates.
Información de cumplimiento
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC18F458 automotive variant for AEC-Q100 applications.