PIC18F458-E/P - 8-Bit 40MHz MCU with CAN | Microchip
N.º de pieza: PIC18F458-E/P ✗ Fin de vidaPIC18F458-E/P Descripción general
A microcontroller is a programmable system-on-chip that integrates a processor core, memory, I/O, and peripherals into one component. The PIC18 belongs to the 8-bit microcontroller hierarchy, where its enhanced Flash architecture combines a compact RISC instruction set with dedicated communication and mixed-signal functions. This places it within the broader embedded-control category between simple logic controllers and higher-performance 16-bit or 32-bit microcontrollers.
The verified product information identifies 32 KB of Flash program memory, 1,536 bytes of RAM, a maximum clock frequency of 40 MHz, and 34 I/O pins. The family documentation also identifies a 10-bit analog-to-digital converter and a CAN module. These resources support compact embedded designs requiring deterministic peripheral handling, serial communication, and analog measurement without relying on an external host processor.
PIC18F458-E/P occupies the 40-pin PDIP package, with the commercial designation -/P identifying the through-hole package configuration. Its Flash memory allows field programming and firmware updates, while the CAN module is valuable for distributed industrial or automotive-style networks where nodes need framed communication and robust protocol handling. The exact device pin assignments and electrical limits should be taken from the Microchip PIC18F248/258/448/458 datasheet.
Typical uses include CAN-connected industrial controllers, automotive subsystem controllers, data-acquisition equipment, communication nodes, and general embedded automation. The 10-bit ADC supports analog sensor inputs, while 34 I/O pins provide interface capacity for switches, indicators, actuators, and external logic. Developers should verify peripheral availability, interrupt behavior, and pin multiplexing in the datasheet before assigning functions.
A critical design consideration is that the PIC18F458 is Not Recommended for new designs. It can still be appropriate for maintenance of existing equipment, but new designs should evaluate current PIC18 devices or other Microchip families that provide an active lifecycle path. Firmware compatibility, peripheral differences, tooling, and long-term supply should therefore be checked before committing a new production run.
This page consolidates verified distributor and manufacturer information with lifecycle context, practical application guidance, and a cautious comparison of potential 40-pin alternatives. It is intended to accelerate engineering review while clearly separating confirmed product facts from parameters that still require verification in the manufacturer datasheet.
Alternativas directas para PIC18F458-E/P — 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 PIC18F458-E/P (mismo factor de forma y huella) — difiere en Package, Operating Temperature, Timers, ADC, Mounting Type.
PIC18F458-I/P
✅ Sustitución directaConsulte el precio
Ver hoja de datos →PIC18F452-I/P
✅ Sustitución directaConsulte el precio
Ver hoja de datos →PIC18LF45K22-E/P
✅ Sustitución directaConsulte el precio
Ver hoja de datos →PIC18F458-E/P Valores máximos y características eléctricas
| Product Type | 8-bit RISC Flash microcontroller |
| Frecuencia de reloj máxima | 40 MHz |
| Program Memory | 32 KB Flash |
| Program Memory Organization | 16K x 16 words |
| Data RAM | 1,536 bytes |
| Data EEPROM | 256 bytes |
| General-Purpose I/O Pins | 34 pins |
| Analog-to-Digital Converter | 10-bit |
| Communication Interface | CAN module |
| Tensión de alimentación | 5 V |
| Encapsulado | 40-pin PDIP |
| Estilo de montaje | Through-hole |
| Estado RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
Guía de configuración de pines de PIC18F458-E/P 40-pin pdip
Configuración de pines para PIC18F458-E/P (encapsulado 40-pin pdip). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para PIC18F458-E/P.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
PIC18F458-E/P es adecuado para 6 aplicacións: CAN-Connected Industrial Control Nodes, Automotive Subsystem Controller, Analog Data-Acquisition Controller, Communication and Protocol Converter, Embedded Automation and Process Control, Legacy Equipment Maintenance Controller.
CAN-Connected Industrial Control Nodes
PIC18F458-E/P fits distributed industrial controllers because it combines a CAN module, an 8-bit RISC core operating up to 40 MHz, 32 KB of Flash program memory, 1,536 bytes of RAM, and 34 I/O pins. A node can acquire local inputs, execute supervisory logic, and exchange framed data with other equipment over the CAN bus. The 40-pin PDIP package also supports straightforward through-hole assembly and inspection. Compared with a smaller MCU lacking CAN, this device consolidates communication and control into one package. Its 256-byte EEPROM can retain limited configuration data, although that capacity should not be confused with bulk data logging. For deployed equipment, engineers must verify the supported CAN version, transceiver requirements, isolation strategy, pin multiplexing, timing margins, and environmental qualification. Because the family is Not Recommended for new designs, it is most defensible for maintenance and expansion of an installed CAN platform.
Recomendado
Automotive Subsystem Controller
The PIC18F458-E/P can serve as an embedded controller in an automotive subsystem where a dedicated CAN interface, moderately fast control loop, and generous digital I/O are required. Its verified 40 MHz maximum clock supports responsive task scheduling, while 32 KB of Flash provides room for application firmware and 1,536 bytes of RAM supports working state and protocol handling. The 10-bit ADC is useful for resistive or sensor inputs, although automotive sensor interfaces normally require conditioning, diagnostics, and protection beyond the MCU itself. The 40-pin PDIP package is mechanically practical for prototypes and industrial equipment, but it is not a typical choice for compact body modules. A production design must confirm the exact temperature grade, AEC-Q100 status, transient requirements, EMC performance, and lifecycle strategy. The Not Recommended for new designs status favors retaining this part in mature platforms rather than launching entirely new safety- or security-relevant vehicle platforms.
Recomendado
Analog Data-Acquisition Controller
PIC18F458-E/P is suitable for compact data-acquisition equipment that must convert analog inputs, apply control calculations, and communicate results. The integrated 10-bit ADC reduces the need for a separate converter in applications whose resolution requirements are moderate, while 34 I/O pins can support sensors, switches, status indicators, and communication logic. With 32 KB of Flash and 1,536 bytes of RAM, firmware can implement calibration, filtering, sampling control, and a serial protocol without requiring an external processor. The 5 V operating point also simplifies integration with conventional industrial logic. Practical designs should define the ADC input count, acquisition timing, input impedance, reference strategy, and noise performance from the datasheet rather than inferring them from the general 10-bit designation. External buffering and protection may be required near long cables, switches, or high-energy transducer outputs. The large 40-pin PDIP footprint also provides ample routing space for a through-hole prototype or industrial control board.
Recomendado
Communication and Protocol Converter
PIC18F458-E/P can act as the central controller in a protocol-conversion or communication gateway because it combines 32 KB of Flash, 1,536 bytes of RAM, 34 I/O pins, and a CAN module. A firmware-defined gateway can receive CAN frames, validate identifiers, translate data, and expose status through another serial interface. The 40 MHz clock provides ample processing margin for ordinary protocol handling, and the 40-pin PDIP package leaves a useful number of pins for buffers, transceivers, indicators, and configuration inputs. The 10-bit ADC can additionally support supervisory measurements such as supply or connector voltage. A production implementation should account for bus termination, protection, isolation, watchdog behavior, firmware update strategy, and protocol timing. The MCU itself is not a physical CAN transceiver, so an appropriate external network interface remains required. This makes the device useful for maintaining specialized legacy gateways where an existing 40-pin PCB and established toolchain reduce migration risk.
Recomendado
Embedded Automation and Process Control
PIC18F458-E/P provides enough control and connectivity for embedded automation modules that supervise actuators, read inputs, and report operating status. Its 34 I/O pins can be allocated among digital sensors, relay or valve drive controls, indicators, and service interfaces, while the 10-bit ADC supports basic analog process measurements. The 32 KB of program Flash accommodates state-machine logic and protocol routines, and the 1,536-byte RAM is sufficient for many supervisory rather than high-bandwidth workloads. The 40-pin PDIP package is especially convenient for through-hole industrial boards where long component spacing and inspection are advantageous. Hardware design should include driver transistors, flyback protection, isolation boundaries, robust decoupling, and defined reset behavior rather than connecting loads directly to MCU pins. The device's lifecycle status makes it appropriate for extending installed automation equipment, but new machinery should generally use a currently recommended MCU with a supported long-term roadmap.
Recomendado
Legacy Equipment Maintenance Controller
PIC18F458-E/P is a practical choice for repairing or extending legacy industrial equipment because it retains an established PIC18 toolchain, 32 KB of Flash, 1,536 bytes of RAM, 34 I/O pins, and CAN communication in a widely used 40-pin PDIP format. Maintenance engineers can reproduce the original controller, retain proven peripheral assignments, or create a temporary monitor that records state and communicates diagnostics. The 5 V supply and through-hole package simplify integration with existing boards and service fixtures. Reproducibility still depends on obtaining genuine devices, confirming package and grade markings, checking the original firmware requirements, and validating every peripheral function against the manufacturer datasheet. Because the device is Not Recommended for new designs, long-term obsolescence planning should include redesigning the controller around a currently supported family before the maintenance ecosystem becomes constrained. A drop-in alternative should be selected only after a complete pin, electrical, software, and qualification review rather than based on memory capacity alone.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18F458-E/P — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC18F458-I/P | PIC18F452-I/P | PIC18LF45K22-E/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP |
| Architecture | 8-bit RISC | 8-bit RISC | 8-bit RISC | 8-bit RISC |
| Program Flash | 32 KB | 32 KB | 32 KB | 32 KB |
| Data RAM | 1,536 bytes | 1,536 bytes | 1,536 bytes | 1,536 bytes |
Diferenciadores clave
- Confirmed CAN integration in a 40-pin through-hole MCU (frente a PIC18F452-I/P)
- Closest family ordering-code alternative (frente a PIC18F458-I/P)
- Established memory and package continuity (frente a PIC18LF45K22-E/P)
Notas de diseño
Treat the 40-pin PDIP footprint as a through-hole automotive and industrial assembly package rather than a surface-mount land pattern. Verify pin 1 orientation, maintain clearance around the socket or board, and route sensitive analog inputs away from CAN, relay, and switching-supply nodes. Although the supplied records confirm a 40-pin PDIP package, they do not provide the complete footprint dimensions or pin table; use the manufacturer package drawing rather than relying on a generic PDIP footprint.
The verified nominal supply is 5 V, but the retrieved material does not include the complete absolute-maximum or recommended operating-condition tables. Before connecting external circuitry, confirm VDD limits, input levels, reset behavior, and peripheral current from the Microchip datasheet. Decouple the supply near the package, provide a deterministic reset network, and isolate noisy actuator drivers from the MCU. Do not infer current margin from the 40 MHz clock rating or the number of I/O pins.
PIC18F458-E/P is marked Not Recommended for new designs, making lifecycle planning a central design issue rather than an afterthought. Confirm authorized-channel availability, date codes, and long-term support before committing to production. If the device is used for maintenance, preserve the original grade and package suffix during substitution. A candidate sharing 40-pin PDIP construction and 32 KB Flash is not automatically interchangeable because ADC channels, CAN behavior, interrupts, timers, and firmware boot configuration may differ.
The integrated 10-bit ADC makes analog routing convenient, but the provided data does not specify its channel count, sample time, input impedance, or reference behavior. Check those parameters in the family datasheet before selecting divider values or sensor interfaces. Keep analog traces short, use a stable reference strategy, and place any required filtering close to the input pins. If the board also carries CAN or switching power circuitry, use controlled return paths and controlled-ground partitioning to prevent converter and bus transients from corrupting measurements.
Información de cumplimiento
The verified product and distributor records do not provide specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Compliance must be confirmed using the current Microchip product declaration or the exact manufacturer lot documentation.
