MCP4351T-502E/ST Equivalent & Substitute Parts

Part Overview

The MCP4351T-502E/ST is a digital potentiometer manufactured by Microchip Technology, classified as a Data Acquisition component. This integrated circuit provides 4 independent 5kΩ potentiometer circuits with 257 taps, controlled via SPI interface. The device operates across a supply voltage range of 1.8V to 5.5V and is rated for operating temperatures from -40°C to 125°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Alternative models may be required due to packaging availability, inventory constraints, or specific application requirements for different packaging formats.

Substiute Parts

MCP4351T-502E/ST

Microchip TechnologyIn Stock: 946MCP4351T-502E/ST Datasheet

Current PartRFQ

MCP4351-502E/ST

Microchip TechnologyIn Stock: 1000242MCP4351-502E/ST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MCP4351T-502E/ST is determined by strict equivalence across the following critical parameters: resistance value (5kΩ), number of independent circuits (4), tap count (257), SPI interface protocol, supply voltage compatibility (1.8V ~ 5.5V), operating temperature range (-40°C ~ 125°C), package type (20-TSSOP), and surface mount configuration. The primary distinction between the main part and its substitute relates to packaging format: the MCP4351T-502E/ST is supplied in Tape & Reel format, while the MCP4351-502E/ST is supplied in Tube format. Both parts share identical electrical specifications, mechanical dimensions, and functional characteristics. Substitution is valid when the application environment and assembly process can accommodate the alternative packaging format without affecting circuit performance or reliability.

Parameter Comparison

Engineering Selection Recommendations

Both the MCP4351T-502E/ST and MCP4351-502E/ST are active production parts from Microchip Technology with full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on assembly and procurement requirements. The Tape & Reel format (MCP4351T-502E/ST) is optimized for high-volume automated pick-and-place assembly operations. The Tube format (MCP4351-502E/ST) is suitable for lower-volume applications, manual assembly, or situations where reel-based handling infrastructure is unavailable. Both formats deliver identical electrical performance and mechanical fit within the 20-TSSOP package envelope. Inventory availability and supply chain logistics may influence part selection, as the substitute part shows significantly higher stock levels.

Frequently Asked Questions (FAQ)

Q: Can MCP4351-502E/ST (Tube packaging) be used as a direct replacement for MCP4351T-502E/ST (Tape & Reel packaging)?

A: Yes. Both parts are electrically and mechanically identical. The only difference is the packaging format. Substitution is valid provided the assembly process can accommodate tube-packaged components. No circuit redesign or firmware modification is required.

Q: Are there any electrical performance differences between the two parts?

A: No. Both parts share identical specifications for resistance value, tap count, SPI interface, supply voltage range, operating temperature range, tolerance, temperature coefficient, and wiper resistance. Electrical performance is equivalent.

Q: What is the significance of the packaging format difference?

A: Tape & Reel format is designed for automated high-speed assembly lines with reel-feeding equipment. Tube format is designed for manual handling, lower-volume production, or assembly environments without reel infrastructure. The choice depends on manufacturing capability and volume requirements, not on circuit performance.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both MCP4351T-502E/ST and MCP4351-502E/ST are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited moisture sensitivity). Both are suitable for applications requiring regulatory compliance.

Q: Can these parts be used interchangeably in the same PCB design?

A: Yes. Both parts use the identical 20-TSSOP package with the same pinout, footprint, and mechanical dimensions. No PCB layout modifications are required for substitution.

Q: What is the difference between volatile and non-volatile memory in this context?

A: Both parts feature volatile memory, meaning potentiometer settings are retained only while power is supplied. Settings are lost upon power removal. This is the standard behavior for this device class and does not affect substitution eligibility.