PIC18F258-I/SO Equivalent & Substitute Parts

Part Overview

The PIC18F258-I/SO is an 8-bit microcontroller from Microchip Technology's PIC® 18F series, featuring 32KB FLASH program memory, 1.5KB RAM, and 256 bytes of EEPROM. This device integrates CANbus, I2C, SPI, and UART/USART connectivity with a 40MHz operating frequency and operates across the -40°C to 85°C temperature range. The PIC18F258-I/SO is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

PIC18F258-I/SO

Microchip TechnologyIn Stock: 1998PIC18F258-I/SO Datasheet

Current PartRFQ

PIC18F2580-I/SO

Microchip TechnologyIn Stock: 2030PIC18F2580-I/SO Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC18F258-I/SO is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Core processor architecture (PIC)
• Core size (8-Bit)
• Operating frequency (40MHz)
• Program memory capacity (32KB FLASH)
• RAM capacity (1.5K x 8)
• EEPROM capacity (256 x 8)
• Supply voltage range (4.2V ~ 5.5V)
• Package type and dimensions (28-SOIC)
• Operating temperature range (-40°C ~ 85°C)

The PIC18F2580-I/SO qualifies as a direct substitute based on matching all critical electrical specifications and identical package configuration. Variations in secondary parameters such as I/O count, peripheral feature sets, and oscillator type do not preclude substitution when core memory, voltage, frequency, and thermal specifications remain constant.

Parameter Comparison

Engineering Selection Recommendations

The PIC18F2580-I/SO is the direct substitute for the obsolete PIC18F258-I/SO. Both devices maintain identical electrical specifications across core memory, processing speed, voltage supply, and thermal operating range. The PIC18F2580-I/SO carries Active product status, ensuring continued availability and manufacturing support. Both parts are ROHS3 compliant and carry identical ECCN and HTSUS classifications, confirming regulatory equivalence. The transition from the obsolete PIC18F258-I/SO to the PIC18F2580-I/SO requires no circuit redesign when core electrical and thermal requirements are met.

Frequently Asked Questions (FAQ)

Q: Can the PIC18F2580-I/SO directly replace the PIC18F258-I/SO in existing designs?

A: Yes. Both devices share identical core specifications including 8-bit architecture, 40MHz speed, 32KB FLASH memory, 1.5KB RAM, 256-byte EEPROM, 4.2V to 5.5V supply voltage, and 28-SOIC package dimensions. The electrical and mechanical compatibility is complete.

Q: What is the difference in I/O pin count between these parts?

A: The PIC18F258-I/SO provides 22 I/O pins, while the PIC18F2580-I/SO provides 25 I/O pins. Both devices use the same 28-SOIC package. The additional I/O pins in the PIC18F2580-I/SO do not affect substitution compatibility when the original design utilizes only the available pins.

Q: Are there differences in peripheral features?

A: The PIC18F258-I/SO includes LVD (Low Voltage Detect) peripherals, while the PIC18F2580-I/SO includes HLVD (High/Low Voltage Detect). Both devices include Brown-out Detect/Reset, POR, PWM, and WDT. The PIC18F2580-I/SO also supports internal oscillator operation, whereas the PIC18F258-I/SO requires external oscillator configuration. These differences do not prevent substitution when core memory and voltage specifications are maintained.

Q: What is the moisture sensitivity level difference?

A: The PIC18F258-I/SO carries MSL 3 (168 Hours), while the PIC18F2580-I/SO carries MSL 1 (Unlimited). The PIC18F2580-I/SO offers superior moisture resistance characteristics, providing enhanced reliability in storage and handling environments.

Q: Are both parts RoHS compliant?

A: Yes. Both the PIC18F258-I/SO and PIC18F2580-I/SO are ROHS3 compliant and REACH unaffected, confirming equivalent environmental and regulatory status.