PIC18F258-E/SO - 8-bit 40MHz 32KB Flash MCU w/ CAN | Microchip
MPN: PIC18F258-E/SO ✗ Cuối đờiPIC18F258-E/SO Tóm tắt
A PIC18F-series microcontroller is an 8-bit Harvard-architecture MCU based on the Microchip PIC instruction set, designed as a programmable system-on-chip that integrates CPU core, Flash, RAM, EEPROM, peripherals, and I/O in one package. PIC18F MCUs occupy the "high-performance 8-bit" tier in Microchip's taxonomy: 8-bit microcontroller -> PIC18 family -> PIC18F2x/4x sub-family -> embedded MCU. They typically follow the higher-level path MCU -> microcontroller -> embedded controller -> semiconductor IC. PIC18F devices extend the base PIC16 instruction set with linear memory, priority interrupts, a hardware multiplier, and C-friendly architecture, while preserving pin compatibility with older PIC16 designs where feasible.
Key features of the PIC18F258 include the integrated ECAN (Enhanced CAN) module supporting CAN 2.0B active with eight acceptance filters, a 10-bit ADC with up to 8 input channels, three timers, two capture/compare/PWM (CCP) modules, an enhanced USART, an MSSP module (SPI/I2C), and a parallel slave port. The 28-SOIC package exposes up to 23 digital I/O pins and operates from 2.0 V to 5.5 V supply.
The device is built on an enhanced Harvard architecture with a 16-bit wide instruction path and an 8-bit data path. The C compiler-optimized instruction set and hardware multiply/divide engine deliver deterministic interrupt latency and 10 MIPS throughput, while Flash self-programmability under software control supports in-application firmware upgrades.
Typical applications include automotive CAN nodes (body controllers, instrument clusters), industrial CAN-based sensor networks, embedded CAN bridges, and any cost-sensitive node requiring on-chip CAN without an external controller. Other common uses are HVAC controls, low-cost telemetry, and lighting controls.
When designing with the PIC18F258-E/SO, ensure the oscillator configuration (HS/HSPLL/EC/RC) is selected correctly for the chosen external crystal and verify the CAN bus termination (typically 120 Ω at each end of the bus) plus proper transceiver selection (e.g., MCP2551 or TJA1050) for robust in-vehicle or industrial signaling.
This page synthesizes distributor pricing, drop-in 28-SOIC alternatives from Microchip's PIC18F family, and practical design notes that the manufacturer datasheet alone does not provide.
Bộ thay thế dễ dàng lắp đặt cho PIC18F258-E/SO — 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 PIC18F258-E/SO (cùng hình factor và footprint) — khác nhau ở ADC, Package, Core, Operating Temperature, Timers.
PIC18F258-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F248-E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2480-E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F252-E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2420-E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2585-E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F258-E/SO Tỷ lệ tối đa & tính chất điện
| Core | PIC18F 8-bit Harvard |
| Instruction Set Width | 16-bit (8-bit data path) |
| Maximum CPU Frequency | 40 MHz |
| MIPS (Peak) | 10 MIPS |
| Program Memory Type | Enhanced Flash |
| Program Memory Size | 32 KB (16K x 16) |
| RAM | 1536 bytes |
| EEPROM | 256 bytes |
| Supply Voltage Range | 2.0 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +125 C (E suffix) |
| I/O Pins | 23 |
| ADC | 10-bit, up to 8 channels |
| CAN Module | ECAN (CAN 2.0B active) |
| Timers | 3 |
| CCP Modules | 2 |
| Serial Interfaces | EUSART, MSSP (SPI/I2C), Parallel Slave Port |
| Hộp | 28-pin SOIC (SO) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F258-E/SO
| Chân 1 | MCLR/VPP — Master Clear (reset) input or programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | VDD — Positive supply voltage |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Chân 10 | OSC2/CLKO — Crystal oscillator output / clock output |
| Chân 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| Chân 13 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Chân 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 17 | RC6/TX/CK — PORTC bit 6 / EUSART TX / EUSART clock |
| Chân 18 | RC7/RX/DT — PORTC bit 7 / EUSART RX / EUSART data |
| Chân 19 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Chân 20 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Chân 21 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Chân 22 | RB3/CCP2 — PORTB bit 3 / CCP2 (alternate) |
| Chân 23 | RB4 — PORTB bit 4 |
| Chân 24 | RB5/PGM — PORTB bit 5 / LVP programming |
| Chân 25 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 26 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 27 | VSS — Ground reference |
| Chân 28 | VDD — Positive supply voltage |
Ứng dụng tiêu biểu
PIC18F258-E/SO phù hợp cho 6 Áp dụngs: Automotive CAN Node, Industrial CAN-Based Sensor Network, Embedded CAN Bridge / Gateway, HVAC Control Module, Lighting Control via CAN, Low-Cost CAN Telemetry Node.
Automotive CAN Node
The PIC18F258-E/SO's on-chip ECAN module supporting CAN 2.0B active plus its extended -40 C to +125 C temperature range make it a natural fit for automotive CAN nodes such as body controllers, door modules, instrument clusters, and HVAC controllers. Pairing it with an MCP2551 high-speed CAN transceiver yields a complete bus interface. The device delivers 10 MIPS throughput at 40 MHz, more than enough to handle 1 Mbps CAN traffic plus periodic ADC polling of up to 8 analog channels for thermistor or position sensing. Unlike software-bit-banged CAN, the ECAN hardware delivers deterministic bus arbitration and frees the CPU for application logic. Note that the part is not AEC-Q100 qualified; for OEM-grade automotive, migrate to a Q1 derivative.
Được đề xuất
Industrial CAN-Based Sensor Network
Industrial CAN networks used in factory automation, machine control, and process instrumentation benefit from the PIC18F258-E/SO's integrated ECAN, 32 KB Flash, 1536 B RAM, and 23 digital I/O pins in a compact 28-SOIC footprint. The 10 MIPS CPU easily runs CANopen or DeviceNet slave stacks plus local sensor sampling. The 10-bit ADC with up to 8 channels handles analog sensor inputs (temperature, pressure, flow) directly, while the EUSART supports RS-485 side-channels for legacy equipment. Power consumption is typically <100 mW active at 5 V and 40 MHz, manageable on a 24 V industrial bus with a small switching regulator upstream. Per Microchip's PIC18F2x/4x datasheet (DS39598), the ECAN module's eight acceptance filters cleanly isolate node-specific traffic on a busy bus.
Được đề xuất
Embedded CAN Bridge / Gateway
Bridge applications that translate between CAN and other protocols (UART, SPI, USB) leverage the PIC18F258-E/SO's combination of ECAN plus EUSART plus MSSP (SPI/I2C). A typical gateway uses ECAN to receive CAN frames at 500 kbps, parses them in firmware, and retransmits converted data over UART to a host controller. The 32 KB Flash comfortably fits protocol stacks plus custom routing logic, while 1536 B RAM is sufficient for CAN mailbox buffers and translation tables. At 10 MIPS, the CPU handles background CAN traffic with predictable interrupt latency, ensuring no frames are lost under heavy load.
Được đề xuất
HVAC Control Module
Heating, ventilation, and air-conditioning (HVAC) control modules often use CAN for inter-module communication in modern building automation. The PIC18F258-E/SO suits this role by combining ECAN with a 10-bit ADC that reads multiple analog temperature sensors and potentiometer setpoints, plus PWM-capable CCP modules that drive fan motor control signals. The 28-SOIC footprint fits inside standard HVAC control board assemblies, and the extended -40 C to +125 C range handles plenum-temperature environments. Low-power sleep modes from the PIC18F family datasheet (DS39598) reduce standby current to microamp levels during idle periods.
Được đề xuất
Lighting Control via CAN
Architectural and stage-lighting systems increasingly use CAN-based DMX-style buses for dimmer control. The PIC18F258-E/SO's 32 KB Flash hosts custom dimming curves and fade sequences, while the ECAN module receives lighting control frames from a central console. Two CCP modules provide hardware PWM outputs to drive constant-current LED drivers (such as the TLC5940) directly from the MCU, and the 10-bit ADC monitors feedback for closed-loop intensity control. The 28-SOIC package mounts compactly on per-channel dimmer PCBs.
Được đề xuất
Low-Cost CAN Telemetry Node
Cost-sensitive telemetry nodes that periodically broadcast sensor readings over a CAN bus benefit from the PIC18F258-E/SO's small 28-SOIC footprint, integrated ECAN, and adequate 1536 B RAM. Battery-powered nodes use the PIC18F family's nanoWatt-style sleep modes to extend operating life; wake-on-CAN activity is supported by the ECAN module's filter logic. The 10 MIPS CPU wakes within microseconds to transmit a packet and return to sleep. The 10-bit ADC with up to 8 channels covers typical battery-voltage, temperature, and level-sensor inputs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F258-E/SO — 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 | PIC18F258-I/SO | PIC18F248-E/SO | PIC18F2480-E/SO | PIC18F252-E/SO | PIC18F2585-E/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Program Memory (Flash) | 32 KB | 32 KB | 16 KB | 16 KB | 48 KB | 48 KB |
| RAM | 1536 B | 1536 B | 768 B | 768 B | 1536 B | 3328 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| CAN Module | ECAN (CAN 2.0B active) | ECAN | ECAN | ECAN | None (no CAN) | ECAN |
| Max CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 48 MHz |
| Operating Temperature | -40 C to +125 C (E) | -40 C to +85 C (I) | -40 C to +125 C (E) | -40 C to +125 C (E) | -40 C to +125 C (E) | -40 C to +125 C (E) |
Bảo phân biệt quan trọng
- Highest-temperature-grade variant in the 32KB Flash / ECAN sub-family (vsPIC18F258-I/SO)
- Larger Flash than the PIC18F248 sibling (vsPIC18F248-E/SO)
- Includes the on-chip ECAN module that PIC18F252 lacks (vsPIC18F252-E/SO)
Ghi chú thiết kế
The PIC18F258-E/SO operates from 2.0 V to 5.5 V. Decouple VDD/VSS pairs (pins 7/8 and 28/27) with a 100 nF ceramic capacitor placed within 5 mm of the package pins; add a bulk 10 uF tantalum or ceramic capacitor near the supply rail. Per the PIC18F2x/4x family datasheet (DS39598), noisy supply rails can cause ADC inaccuracies and CAN bit-timing jitter - a clean 5 V is critical for reliable ECAN at 1 Mbps.
The PIC18F258 contains the legacy CAN peripheral, not the newer ECAN module found on PIC18F2580/2585 families. Firmware written for PIC18F2580/2585 will NOT port directly: register layouts, acceptance filter count, and buffer organization differ. When migrating from the PIC18F258, re-validate the CAN stack and acceptance masks against the PIC18F248/258/448/458 datasheet (DS39598). Cross-check pin 25 (CANTX) and pin 26 (CANRX) against the chosen transceiver's TXD/RXD polarity.
Route the CAN differential pair (CANTX pin 25 to CANRX pin 26, then to the external transceiver) as a matched-impedance differential pair with 120 ohm characteristic impedance, kept short and routed away from switching nodes. Add a 120 ohm termination resistor at each end of the bus. Ground the transceiver's GND pin with a short, direct trace. The MCU oscillator traces (OSC1/OSC2 pins 9-10) must be kept short and surrounded by a ground pour to minimize EMI susceptibility on the CAN bus.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - for AEC-Q100 automotive designs migrate to PIC18F2580-Q1 or dsPIC33F automotive variants.
