MCP4351T-103E/ST Equivalent & Substitute Parts

Part Overview

The MCP4351T-103E/ST is a digital potentiometer manufactured by Microchip Technology, classified as a Data Acquisition component. This integrated circuit provides 10kΩ resistance with 4 independent circuits and 257 taps, controlled via SPI interface. The device is currently in active production status with 3200 units available in new original stock. Digital potentiometers serve as electronic replacements for mechanical potentiometers in applications requiring programmable resistance adjustment, making substitute part identification critical for design flexibility and supply chain continuity.

Substiute Parts

MCP4351T-103E/ST

Microchip TechnologyIn Stock: 3210MCP4351T-103E/ST Datasheet

Current PartRFQ

MCP4351-103E/ST

Microchip TechnologyIn Stock: 1163MCP4351-103E/ST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MCP4351T-103E/ST is determined by strict equivalence across the following critical parameters:

• Resistance value: 10kΩ
• Number of independent circuits: 4
• Number of taps: 257
• Control interface: SPI
• Supply voltage range: 1.8V ~ 5.5V
• Taper characteristic: Linear
• Tolerance specification: ±20%
• Temperature coefficient: 150ppm/°C
• Operating temperature range: -40°C ~ 125°C
• Package type: 20-TSSOP
• Memory configuration: Volatile

The identified substitute part maintains identical electrical and mechanical specifications, differing only in packaging format (Tube versus standard packaging) and inventory source, with no impact on functional performance or circuit compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the MCP4351T-103E/ST and MCP4351-103E/ST are active production components from Microchip Technology with identical electrical specifications and package geometry. Selection between these parts is based on supply chain and packaging requirements rather than functional differences. Both components maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The MCP4351T-103E/ST offers higher inventory availability (3200 units) in standard packaging, while the MCP4351-103E/ST provides 1104 units in Tube packaging format. For applications requiring immediate availability or bulk quantities, the MCP4351T-103E/ST is the primary selection. For applications with specific packaging or handling requirements, the MCP4351-103E/ST serves as a direct functional equivalent.

Frequently Asked Questions (FAQ)

Q: Are MCP4351T-103E/ST and MCP4351-103E/ST electrically interchangeable?

A: Yes. Both parts are manufactured by Microchip Technology with identical electrical specifications, including 10kΩ resistance, 4 circuits, 257 taps, SPI interface, and operating parameters. They are direct functional equivalents with no circuit design modifications required.

Q: What is the difference between these two part numbers?

A: The primary difference is packaging format. The MCP4351T-103E/ST uses standard packaging, while the MCP4351-103E/ST is supplied in Tube packaging. Electrical performance and pin configuration are identical.

Q: Can I use MCP4351-103E/ST as a drop-in replacement for MCP4351T-103E/ST?

A: Yes. The 20-TSSOP package dimensions are identical (0.173" × 4.40mm width), and all electrical parameters match. No PCB layout or schematic modifications are necessary.

Q: Are both parts RoHS compliant?

A: Yes. Both MCP4351T-103E/ST and MCP4351-103E/ST are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the moisture sensitivity level for these components?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.