PIC18F258T-I/SOG - 8-bit 40MHz 32KB Flash MCU w/ CAN | Microchip
MPN: PIC18F258T-I/SOG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.2 | $9.20 |
| 10 | $8.45 | $84.50 |
| 100 | $7.6 | $760.00 |
| 500 | $6.95 | $3,475.00 |
| 1,000 | $6.4 | $6,400.00 |
PIC18F258T-I/SOG Overview
Background knowledge: A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), data memory (RAM), and a rich set of peripheral interfaces such as timers, ADC, communication ports (UART, SPI, I2C), and, in this case, a CAN controller. The PIC18F family is Microchip's high-performance 8-bit architecture using a 16-bit instruction word and 8-bit data path, with a hardware multiplier and C-friendly architecture designed for embedded control applications. MCUs sit at the top of the embedded hierarchy: MCU -> microprocessor -> semiconductor -> integrated circuit.
Key features of the PIC18F258 include 32KB Flash / 1.5KB RAM / 256 bytes EEPROM, an integrated CAN 2.0B controller with bus mastering capability, 10-bit ADC with up to 8 channels, enhanced CCP (Capture/Compare/PWM) modules, a USART with LIN support, MSSP for SPI/I2C, four timers, and 22 I/O pins with high-current sink/source. It supports 5V operation, runs at up to 40 MHz (10 MIPS), and includes nanoWatt power management for low-power designs.
Architecturally, the PIC18F258T-I/SOG is built on an enhanced Harvard architecture with separate program and data buses for simultaneous instruction fetch and operand access. The integrated ECAN module provides hardware CAN 2.0B active or passive filtering, multiple buffers, and bit timing flexibility, removing the need for an external CAN controller. The 'T' suffix indicates Tape and Reel packaging; 'I' denotes the industrial temperature grade; 'SO' indicates SOIC-28 wide-body; and 'G' indicates lead-free (Pb-free) terminal finish.
Typical applications include automotive body and chassis networks (CAN nodes for window lifters, seat controllers, lighting, sensors), industrial automation nodes, building automation (HVAC controllers, smart thermostats), sensor-actuator bridges, and any cost-sensitive CAN node on a 5V industrial bus.
A key design consideration: place the internal CAN transceiver's reference and bus termination (typically 120 Ω at each end of the bus) correctly and ensure the MCU's CANTX/CANRX lines are routed to an external CAN transceiver such as the MCP2551 or MCP2562 - the PIC18F258 only includes the CAN protocol controller, not the physical-layer transceiver.
This page synthesizes verified distributor pricing, drop-in alternatives in the same 28-SOIC package, and practical design notes not collected in a single block in the manufacturer datasheet.
Drop-in alternatives for PIC18F258T-I/SOG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18F258T-I/SOG (same form factor and footprint) — differing in ADC, CAN Module, Core, MSL Level, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F258T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F258-I/SOG
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F258-E/SO
✅ Drop-In✓ In Stock
$6.4 / Unit
View Datasheet →PIC18F248T-I/SO
✅ Drop-In✓ In Stock
$5.42 / Unit
View Datasheet →PIC18F26K80-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F258T-I/SOG Maximum Ratings & Electrical Characteristics
| Family | PIC18F |
| Core | 8-bit PIC |
| Core Architecture | Enhanced Harvard (16-bit instruction / 8-bit data) |
| CPU Frequency (Max) | 40 MHz |
| Instruction Throughput | 10 MIPS |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| Data RAM | 1.5 KB |
| Data EEPROM | 256 bytes |
| Package | 28-pin SOIC wide-body (SO), 0.295" / 7.50mm width |
| Pin Count | 28 |
| Operating Voltage | 4.2 V to 5.5 V (5V typical) |
| I/O Pins | 22 |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| Mounting Type | Surface Mount |
| CAN Module | ECAN 2.0B active/passive, integrated controller (no transceiver) |
| ADC | 10-bit, multi-channel |
| Timers | 4 |
| Communication | 1x USART (LIN-capable), 1x MSSP (SPI/I2C), ECAN |
| PWM Channels | Yes (enhanced CCP) |
| Terminal Finish | Lead-free (G suffix) |
| Packaging Form | Tape and Reel (T suffix) |
| RoHS Status | Compliant |
| MSL Level | 1 (per distributor listings) |
PIC18F258T-I/SOG Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 — Digital I/O / analog input channel 0 |
| Pin 3 | RA1/AN1 — Digital I/O / analog input channel 1 |
| Pin 4 | RA2/AN2/VREF- — Digital I/O / analog input channel 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — Digital I/O / analog input channel 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — Digital I/O / analog input channel 4 / SPI slave select |
| Pin 8 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock / GPIO |
| Pin 9 | OSC2/CLKO/RA6 — Crystal oscillator output / clock out / GPIO |
| Pin 10 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / Timer1 clock input |
| Pin 11 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 PWM |
| Pin 12 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| Pin 13 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Pin 15 | RC5/SDO — Digital I/O / SPI data out |
| Pin 16 | RC6/TX/CK — Digital I/O / USART TX / USART clock |
| Pin 17 | RC7/RX/DT — Digital I/O / USART RX / USART data |
| Pin 18 | RB0/INT0 — Digital I/O / external interrupt 0 |
| Pin 19 | RB1/INT1 — Digital I/O / external interrupt 1 |
| Pin 20 | RB2/INT2 — Digital I/O / external interrupt 2 |
| Pin 21 | RB3/INT3/ECCP — Digital I/O / external interrupt 3 / enhanced CCP |
| Pin 22 | RB4 — Digital I/O |
| Pin 23 | RB5 — Digital I/O |
| Pin 24 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 25 | RB7/PGD — Digital I/O / ICSP data |
| Pin 26 | VDD — Positive supply (5V typical) |
| Pin 27 | VSS — Ground |
| Pin 28 | CANTX/RC6 (alt) — CAN transmit / alternate RC6 function (per family datasheet) |
Typical Applications
PIC18F258T-I/SOG is suitable for 7 applications: Automotive CAN Body Control Nodes, Industrial CANopen / DeviceNet Slave, Building Automation HVAC Controller, Sensor-Actuator Bridge Module, Medical Device CAN Interface, Lighting Control DMX-to-CAN Bridge, Agricultural Equipment Telematics.
Automotive CAN Body Control Nodes
The PIC18F258T-I/SOG is purpose-built for automotive CAN body-control nodes such as window lifters, seat controllers, mirror adjusters, interior lighting, and door modules. Its integrated ECAN 2.0B controller with hardware filtering and 32KB Flash comfortably fits ISO 15765 transport-layer or CANopen CiA 401 device-profile stacks for a single node. The 40 MHz CPU delivers 10 MIPS, providing deterministic response to message IDs at standard 500 kbps CAN bit rates. The wide 28-SOIC footprint gives strong thermal headroom for under-dash modules at +85°C. Per Microchip's automotive-grade MCU portfolio, this part is one of the lowest-cost 5V CAN MCUs in production. Pair the CANTX/CANRX pins with an MCP2562 transceiver to complete the physical layer.
Recommended
Industrial CANopen / DeviceNet Slave
In industrial automation, the PIC18F258T-I/SOG serves as a low-cost slave node on CANopen (CiA 301/401) or DeviceNet networks controlling sensors, valve manifolds, drives, and I/O blocks. Its ECAN controller's active/passive filtering offloads message acceptance from the CPU, leaving MIPS for the application object dictionary and PDO processing. The 1.5KB RAM is sufficient for small CANopen stacks; the 32KB Flash holds the stack plus application logic. The 10-bit ADC with multiple channels lets the same MCU read analog sensors directly. The 4 timers support PWM outputs for valve control. Industrial -40 to +85°C operation matches panel-mount cabinet environments. Connect to a CANopen bus via an isolated transceiver such as the MCP2562 + isolation barrier.
Recommended
Building Automation HVAC Controller
The PIC18F258T-I/SOG is well-suited for building automation HVAC controllers, VAV (variable air volume) boxes, and BACnet gateway nodes that bridge to a CAN bus. The integrated ECAN controller provides deterministic communication to upstream BMS controllers at standard CAN bit rates. The 22 I/O pins can drive triacs, relays, and read temperature/pressure sensors through the multi-channel 10-bit ADC. nanoWatt power-management modes reduce quiescent current in idle states for energy compliance. The 32KB Flash accommodates a small BACnet MS/TP stack or simple custom protocol. Wide 28-SOIC package and 5V tolerance match typical HVAC control board power rails. Industrial temperature range supports unheated equipment rooms.
Recommended
Sensor-Actuator Bridge Module
As a sensor-actuator bridge, the PIC18F258T-I/SOG aggregates analog/digital sensor data and forwards it via CAN, while also driving local actuators (PWM-driven valves, motor bridges, relays). The enhanced CCP modules generate PWM outputs for proportional control of hydraulic or pneumatic actuators. The 4 timers can run free for capture-input frequency measurement of flowmeters or tachometers. The USART supports LIN for sub-networked sensor clusters, while MSSP runs SPI for digital sensors or external EEPROM. The 32KB Flash / 1.5KB RAM envelope fits the CAN stack plus a small RTOS or superloop scheduler. Industrial temp range handles outdoor control boxes.
Recommended
Medical Device CAN Interface
In medical devices such as patient monitors, infusion pumps, and diagnostic equipment that use CAN for inter-module communication, the PIC18F258T-I/SOG can serve as the network co-processor or single-node controller. Its deterministic interrupt latency and hardware ECAN filtering suit medical real-time requirements. The wide 5V supply tolerance and 10-bit ADC let it directly interface with analog medical sensors. Designers should verify IEC 60601-1, IEC 60601-1-2 EMI/EMC, and ISO 14971 risk-management compliance at the system level; the MCU itself does not carry medical certification, but its deterministic 8-bit core is widely adopted in certified medical subsystems. Add an isolated DC-DC and isolated CAN transceiver for patient-isolation boundaries.
Recommended
Lighting Control DMX-to-CAN Bridge
The PIC18F258T-I/SOG can bridge DMX512 lighting data from stage/architectural lighting controllers onto a CAN distribution bus for large venue installations. Its 40 MHz core handles DMX break/MAB timing alongside CAN message generation, while the 32KB Flash stores scene presets. The enhanced CCP generates PWM outputs for direct LED-driver control of small fixtures. Multi-channel 10-bit ADC reads ambient-light sensors for daylight harvesting. The USART (LIN-capable) can additionally interface with sub-bus nodes. 5V industrial-temp operation matches pro-AV rack environments. The wide 28-SOIC package supports reflow on standard 5V assembly lines.
Recommended
Agricultural Equipment Telematics
In agricultural machinery (tractors, harvesters, irrigation controllers), the PIC18F258T-I/SOG can serve as a CAN node reporting engine parameters, implement status, and GPS-derived telemetry. Its integrated CAN controller supports ISO 11783 (ISOBUS) lite-class nodes without external components, and its industrial -40 to +85 °C range tolerates engine-bay temperatures. The 10-bit ADC monitors analog sensor channels (fuel level, soil moisture, hydraulic pressure). 22 I/O pins drive relays and indicator LEDs. Pair with an MCP2562 CAN transceiver and a wide-input DC-DC for 12V/24V battery systems. The 32KB Flash fits a small J1939 address-claim and status-reporting stack.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F258T-I/SOG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F258T-I/SO | PIC18F258-I/SOG | PIC18F258-E/SO | PIC18F248T-I/SO | PIC18F26K80-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC wide-body (SO) | 28-SOIC wide-body (SO) - same | 28-SOIC wide-body (SO) - same | 28-SOIC wide-body (SO) - same | 28-SOIC wide-body (SO) - same | 28-SOIC wide-body (SO) - same |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 64 KB (+100%) |
| RAM | 1.5 KB | 1.5 KB | 1.5 KB | 1.5 KB | 0.75 KB (-50%) | 3.6 KB (+140%) |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 1 KB (+300%) |
| CPU Frequency | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 64 MHz / 16 MIPS |
| CAN Controller | ECAN 2.0B integrated | ECAN 2.0B integrated | ECAN 2.0B integrated | ECAN 2.0B integrated | ECAN 2.0B integrated | ECAN 2.0B integrated |
| Operating Temperature | -40 to +85 °C (Industrial) | -40 to +85 °C | -40 to +85 °C | -40 to +125 °C (Extended) | -40 to +85 °C | -40 to +85 °C |
| Terminal Finish | Lead-free (G) | Lead-bearing | Lead-free (G) | Lead-bearing | Lead-bearing | Lead-free (G) |
Key Differentiators
- Integrated ECAN 2.0B controller eliminates external MCP2515 SPI-CAN bridge (vs PIC18F2550-I/SO (USB-only, no CAN))
- 32 KB Flash + 1.5 KB RAM supports full CANopen / J1939 stacks (vs PIC18F248T-I/SO (16 KB Flash / 0.75 KB RAM))
- Wide-body 28-SOIC footprint is pin-compatible with PIC18F26K80 modern upgrade (vs PIC18F248 (older, less memory))
Design Notes
The PIC18F258 integrates only the CAN 2.0B protocol controller, NOT the physical-layer transceiver. Wiring CANTX/CANRX directly to a CAN bus will NOT work and may damage the MCU. Always connect to an external CAN transceiver such as MCP2551 (legacy) or MCP2562 (modern, 5V/IFC) which provides the differential CANH TX/CDR drivers required by ISO 11898. Add 120 Ω termination at each end of the bus only.
Operate the PIC18F258T-I/SOG from a clean 4.2-5.5V supply on VDD (pin 26) with decoupling: 100 nF ceramic + 10 µF bulk placed within 5 mm of the VDD pin. Use a star-ground topology with VSS (pin 27) returning directly to the power-ground plane. The wide-body SOIC dissipates more board heat than the narrow SOIC; for high-IO-loading designs, copper-pour VDD/VSS islands help thermal performance at +85 °C.
Keep the crystal traces (OSC1/OSC2, pins 8-9) short - under 10 mm if possible - and guard them with a ground ring to minimize radiated EMI into the CAN bus traces. Route CANTX/CANRX as a short matched-pair to the external transceiver, with CANTX closest to the MCU. Place the MCP2562 within 25 mm of the MCU. Avoid routing CAN lines near switching regulators or clock oscillators to preserve ECAN signal integrity at 1 Mbps.
For 1 Mbps CAN, verify the bus topology has 120 Ω termination at both physical ends of the bus (NOT at every node). Stub length from the bus to each transceiver should be under 0.3 m at 1 Mbps. The PIC18F258's ECAN peripheral supports programmable SJW, PROP, SEG1, SEG2 segments - configure for the chosen bit rate per the CAN bit-time calculation tables in the datasheet, and verify with an oscilloscope on CANH-CANL.
Estimated: At maximum CPU activity (40 MHz, full IO toggle) the PIC18F258 consumes roughly 50-70 mW on a 5V supply, yielding a junction-temperature rise of ~5-8 °C above ambient over the 28-SOIC wide-body (theta_JA ~85 °C/W). For an under-dash automotive module at +85 °C ambient, the junction remains well below the +150 °C maximum. For sealed +85 °C enclosures, derate by reducing clock or using sleep modes from nanoWatt technology.
Compliance Information
G suffix in part number designates lead-free terminal finish per Microchip ordering system. The -I (Industrial) temperature grade is -40 to +85 °C, not full AEC-Q100 automotive qualification. For AEC-Q100-grade CAN MCUs in the same footprint family, look at PIC18F258-I/SOG automotive-grade variants. RoHS and REACH compliance per Microchip product environmental compliance documentation.
