PIC18LF258T-I/SOG - 8-bit 40MHz PIC MCU w/ CAN | 28-SOIC
MPN: PIC18LF258T-I/SOG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.32 | $8.32 |
| 10 | $7.48 | $74.80 |
| 100 | $6.71 | $671.00 |
| 500 | $6.05 | $3,025.00 |
| 1,000 | $5.42 | $5,420.00 |
PIC18LF258T-I/SOG Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. Within the Microchip taxonomy, the PIC18F family sits above base-line PIC16 parts and below 16-bit PIC24/dsPIC devices; the PIC18F248/258 sub-family specifically adds the CAN peripheral for automotive and industrial networking. LF designates the low-voltage variant of the PIC18F series, designed to operate down to 2.0V.
Key features include 22 digital I/O pins multiplexed with peripheral functions, a 10-bit 5-channel analog-to-digital converter (ADC), two 8-bit + one 16-bit timers, two analog comparators, an ECAN module with CAN 2.0B active and passive, MSSP for I2C/SPI, and an enhanced USART. The device supports in-circuit serial programming (ICSP) and self-programming under bootloader, plus an ICD block matched by low-voltage debug. Master/slave ports support I2C/SPI master and slave roles.
Architecturally, the PIC18LF258 employs a Harvard RISC core with separate code and data buses, 32 KB Flash for code storage, 1.5 KB SRAM for runtime data, and 256 bytes EEPROM for non-volatile parameter storage. The wide 2.0V-5.5V operating range and on-chip CAN module make it ideal for industrial control modules, automotive body ECUs, and sensor nodes that must communicate over a CAN bus while running from a battery-backed rail.
Typical applications include automotive body controllers (door modules, climate control), industrial CAN node endpoints, sensor transducers with CAN interface, low-power remote telemetry, and consumer appliances requiring robust serial communication. The 28-SOIC package provides drop-in compatibility with the PIC18F248 and other PIC18F 28-pin SOIC variants, allowing PCB reuse across product variants.
When designing with this MCU, plan for a 4xPLL frequency plan and reserve adequate decoupling. A 0.1 uF ceramic capacitor near each power pin plus a bulk 10 uF tantalum or ceramic is recommended. The CAN bus requires a transceiver (e.g. MCP2551 or TJA1050); the PIC18LF258 only handles the protocol layer, not the physical layer.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone Microchip datasheet, providing an engineering-focused resource for component selection, replacement decisions, and BOM validation.
Drop-in alternatives for PIC18LF258T-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 PIC18LF258T-I/SOG (same form factor and footprint) — differing in Package, I/O Pins, Timers, Program Memory (Flash), RAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF258-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF258T-I/SO
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →PIC18LF248T-I/SO
✅ Drop-In✓ In Stock
$3.9 / Unit
View Datasheet →PIC18LF2480T-I/SO
✅ Drop-In✓ In Stock
$5.38 / Unit
View Datasheet →PIC18F258-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF252-I/SO
✅ Drop-In✓ In Stock
$7.65 / Unit
View Datasheet →PIC18LF258T-I/SOG Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC 18F |
| Core | PIC18 (8-bit RISC) |
| Maximum CPU Frequency | 40 MHz (10 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 1.5 KB |
| EEPROM | 256 bytes |
| Operating Voltage | 2.0 V to 5.5 V |
| I/O Pins | 22 |
| ADC | 10-bit, 5 channels |
| CAN Module | ECAN (CAN 2.0B active/passive) |
| Communication Peripherals | ECAN, MSSP (I2C/SPI), EUSART |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Analog Comparators | 2 |
| Package | 28-SOIC (7.50 mm body width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Programming/Debug | ICSP, ICD, self-programming |
| Lead-Free / RoHS | Yes (G suffix indicates lead-free, RoHS-compliant) |
PIC18LF258T-I/SOG Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, programming voltage input |
| 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/C1OUT — Digital I/O / Timer0 clock input / Comparator 1 output |
| Pin 7 | RA5/AN4/SS/C2OUT — Digital I/O / Analog input channel 4 / SPI slave select / Comparator 2 output |
| Pin 8 | OSC1/CLKI/RA7 — Oscillator input / External clock input / Digital I/O |
| Pin 9 | OSC2/CLKO/RA6 — Oscillator output / Clock output / Digital I/O |
| 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 / Capture/Compare/PWM 2 |
| Pin 12 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM 1 |
| 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 / EUSART TX / EUSART clock |
| Pin 17 | RC7/RX/DT — Digital I/O / EUSART RX / EUSART data |
| Pin 18 | VSS — Ground reference |
| Pin 19 | VDD — Positive supply (2.0 V to 5.5 V) |
| Pin 20 | RB0/INT0 — Digital I/O / External interrupt 0 |
| Pin 21 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Pin 22 | RB2/INT2/CANTX — Digital I/O / External interrupt 2 / CAN transmit |
| Pin 23 | RB3/CANRX — Digital I/O / CAN receive |
| Pin 24 | RB4 — Digital I/O / interrupt-on-change |
| Pin 25 | RB5/PGM — Digital I/O / Low-voltage ICSP programming input |
| Pin 26 | RB6/PGC — Digital I/O / In-circuit debugger clock |
| Pin 27 | RB7/PGD — Digital I/O / In-circuit debugger data |
| Pin 28 | VSS — Ground reference |
Typical Applications
PIC18LF258T-I/SOG is suitable for 6 applications: Automotive Body Control Module (CAN), Industrial CAN Node Endpoint, Sensor Transducer with CAN Interface, Low-Power Remote Telemetry Unit, HVAC Climate Control Submodule, Consumer Appliance Controller.
Automotive Body Control Module (CAN)
The PIC18LF258T-I/SOG is a strong fit for automotive body controllers because its integrated ECAN (CAN 2.0B) module, 32 KB Flash, and 2.0-5.5 V LF supply range match the requirements of 12 V battery-backed networks. The MCU can run body-control firmware (door locks, lighting, climate) while the CAN interface handles bus arbitration at 125 kbps to 1 Mbps. Placed between the body-controller power rail and the CAN bus transceiver (MCP2551 or TJA1050), the 258 acts as the protocol-layer endpoint, with 1.5 KB RAM reserved for CAN TX/RX buffers. Compared with a discrete CAN controller plus an external MCU, the integrated ECAN eliminates glue logic and reduces BOM count by one IC. Note that the LF variant is industrial temperature (-40 C to +85 C); for full automotive grade (-40 C to +125 C) an AEC-Q100 qualified part is required.
Recommended
Industrial CAN Node Endpoint
For industrial CANopen or DeviceNet nodes, the PIC18LF258T-I/SOG provides the protocol logic, timers, and ADC needed for a sensor-to-CAN bridge. Its 10-bit 5-channel ADC samples transducer outputs (pressure, temperature, position), while the ECAN module transmits periodic Process Data Objects (PDOs). The 2.0-5.5 V LF supply lets the node share the bus power rail with the rest of the 24 V industrial CAN trunk via a local LDO. Compared with a Cortex-M0 + external CAN controller solution, the 258 reduces PCB area and BOM cost, though at the expense of higher interrupt latency. The 32 KB Flash accommodates CANopen stack plus application code; the 1.5 KB RAM holds OD (object dictionary) tables.
Recommended
Sensor Transducer with CAN Interface
A sensor transducer requiring a CAN bus interface (e.g., a hydraulic pressure sensor or a torque sensor) can use the PIC18LF258T-I/SOG as the bridge between the analog front end and the bus. The 10-bit ADC digitizes sensor outputs at up to ~30 ksps, and the ECAN module transmits scaled CAN frames at the requested cycle time. The wide 2.0-5.5 V supply tolerates regulated 5 V or 3.3 V transducer rails. The 28-SOIC package allows miniaturized transducer head assembly, and the 32 KB Flash supports calibration firmware plus factory compensation curves. Compared with a dedicated ASIC, the MCU-based approach allows field-reprogrammable calibration via ICSP.
Recommended
Low-Power Remote Telemetry Unit
For battery-powered remote telemetry, the PIC18LF258T-I/SOG supports Sleep and Idle modes that drop current to microamp levels while the ECAN wakes on bus activity. The 2.0 V minimum supply lets it run directly from a 2x AA cell pack or a lithium-thionyl-chloride primary cell. The 10-bit ADC samples environmental data (battery voltage, sensor reading) before each transmission, and the 32 KB Flash stores the telemetry protocol plus a simple bootloader for field updates. Compared with a 32-bit Cortex-M0 solution, the PIC18F258 is more power-efficient in idle and uses simpler interrupt architecture.
Recommended
HVAC Climate Control Submodule
The PIC18LF258T-I/SOG is well-suited to HVAC climate-control submodules where it controls a local CAN node that drives blower speeds, temperature setpoint, and damper position. The MCU reads temperature sensors via the 10-bit ADC, controls actuators via PWM generated by the 16-bit timer, and exchanges setpoint messages over ECAN with the central HVAC controller. The 32 KB Flash is sufficient for proportional-integral (PI) control loops plus CANopen/CCP-style messaging. Compared with a relay-only HVAC design, the 258 enables digital control with logging and fault diagnostics. The industrial temperature grade is adequate for indoor HVAC enclosures.
Recommended
Consumer Appliance Controller
For consumer appliances (washing machines, dishwashers, refrigerators), the PIC18LF258T-I/SOG provides appliance-level control plus a CAN interface for service diagnostics. The MCU drives motor control via PWM, reads water level / temperature sensors via the 10-bit ADC, and reports faults to the central service board over ECAN. The 2.0-5.5 V supply accepts a regulated 5 V or 3.3 V SMPS rail directly. The 28-SOIC package is well-suited to high-volume wave or reflow soldering in appliance manufacturing. Compared with a dedicated appliance ASIC, the PIC18F258 keeps firmware flexible and field-reprogrammable, while the ECAN enables predictive maintenance telemetry.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF258T-I/SOG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF258-I/SO | PIC18LF258T-I/SO | PIC18LF248T-I/SO | PIC18LF2480T-I/SO | PIC18F258-I/SO | PIC18LF252-I/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC (7.50 mm body width) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18F (8-bit RISC) | PIC18F (8-bit) | PIC18F (8-bit) | PIC18F (8-bit) | PIC18F (8-bit) | PIC18F (8-bit) | PIC18F (8-bit) |
| Maximum Frequency | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Program Memory (Flash) | 32 KB | 32 KB | 32 KB | 16 KB | 16 KB | 32 KB | 32 KB |
| RAM | 1.5 KB | 1.5 KB | 1.5 KB | 768 B | 768 B | 1.5 KB | 1.5 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Operating Voltage | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (standard) | 2.0 V to 5.5 V (LF) |
| CAN Module | ECAN (CAN 2.0B) | ECAN | ECAN | ECAN | ECAN | ECAN | No CAN |
| Operating Temperature | -40 C to +85 C (I) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Integrated ECAN (CAN 2.0B) eliminates external CAN controller (vs PIC18LF252-I/SO)
- LF grade supports 2.0 V operation for 3.3 V and battery-backed designs (vs PIC18F258-I/SO)
- Larger Flash / RAM headroom for CANopen stacks with bootloader (vs PIC18LF248T-I/SO)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor as close as possible to each VDD/VSS pin pair (pins 19/18 and pin 28). Add a bulk 10 uF tantalum or ceramic at the IC supply trace to handle transient load steps from the ECAN module transmit bursts. The LF variant tolerates 2.0-5.5 V, so a single 3.3 V LDO such as MCP1700 is sufficient for both MCU and MCP2551 CAN transceiver rails. Do not share analog and digital grounds; use a star-ground tie at the regulator return.
The CAN bus requires twisted-pair cable (typically CAT5 or shielded twisted pair), 120 ohm termination resistors at each end, and an isolated bus topology. The PIC18LF258T-I/SOG outputs digital CANRX/CANTX on RB3/RB2, which must be routed to the MCP2551 or TJA1050 transceiver. Keep the CANTX trace short (< 50 mm) and avoid running it parallel to switching traces to minimize radiated EMI. The CAN bus common-mode voltage must be within the transceiver rating (typically +/-12 V for MCP2551); add TVS protection for outdoor or automotive harnesses.
Three common pitfalls: (1) Using the standard PIC18F258 (4.2-5.5 V) instead of the LF variant when the supply is 3.3 V - the F variant will malfunction below 4.2 V. (2) Forgetting the MCP2551 / external CAN transceiver - the PIC18LF258T-I/SOG handles only the protocol layer and does not drive the bus directly. (3) Omitting the MCLR pull-up (typically 10 kohm to VDD) - the part will not exit reset reliably without it. Also, when migrating from PIC18LF258-I/SO, double-check the /SOG tape-and-reel orientation matches the pick-and-place feeders in your line.
Compliance Information
RoHS-compliant and lead-free per the /SOG suffix (G suffix = lead-free / RoHS finish per Microchip ordering code). Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified; for AEC-Q100 automotive grade use PIC18F258-I/SO -Q1 variants. Conflict-minerals declaration per Microchip documentation.
