WMS7204050P Equivalent & Substitute Parts

Part Overview

The WMS7204050P is a digital potentiometer manufactured by Nuvoton Technology Corporation, featuring 50kΩ resistance with 4 circuits and 256 taps in a 20-DIP package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across a 2.7V to 5.5V supply range with SPI interface control and non-volatile memory retention.

Substiute Parts

WMS7204050P

Nuvoton Technology CorporationIn Stock: 939WMS7204050P Datasheet

Current PartRFQ

MCP41010-I/P

Microchip TechnologyIn Stock: 1786MCP41010-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMS7204050P is constrained by the following critical parameters:

• Resistance Value: 50kΩ is the primary functional specification
• Number of Circuits: 4 independent potentiometer circuits
• Interface Protocol: SPI digital control
• Tap Resolution: 256 taps for wiper position control
• Supply Voltage Range: 2.7V to 5.5V compatibility
• Operating Temperature Range: -40°C to 85°C
• Package Form Factor: 20-DIP through-hole mounting

The identified substitute MCP41010-I/P from Microchip Technology presents significant parameter deviations that must be evaluated against application requirements. This part operates as a single-circuit device with 10kΩ resistance in an 8-DIP package, representing a different functional class despite sharing SPI interface and voltage range specifications.

Parameter Comparison

Engineering Selection Recommendations

The MCP41010-I/P substitution is viable only in applications where the following conditions are met:

• Single potentiometer circuit functionality is sufficient (not 4 circuits)
• 10kΩ resistance value is acceptable for the circuit design (not 50kΩ)
• Volatile memory operation is compatible with system architecture (not non-volatile retention)
• PCB layout can accommodate 8-DIP footprint instead of 20-DIP
• Higher temperature coefficient (800ppm/°C vs 500ppm/°C) is within tolerance specifications

The MCP41010-I/P offers the advantage of active product status and ROHS3 compliance, addressing obsolescence and regulatory requirements. However, direct functional replacement is not possible due to resistance value, circuit count, and memory type differences. Circuit redesign or multi-part solutions may be required for full feature parity.

Frequently Asked Questions (FAQ)

Q: Can MCP41010-I/P directly replace WMS7204050P in existing designs?

A: No. The MCP41010-I/P has different resistance (10kΩ vs 50kΩ), circuit count (1 vs 4), memory type (volatile vs non-volatile), and package (8-DIP vs 20-DIP). Direct PCB substitution is not possible.

Q: What are the key differences in memory behavior?

A: The WMS7204050P retains wiper position settings in non-volatile memory after power loss. The MCP41010-I/P requires continuous SPI commands to maintain wiper position, as it uses volatile memory.

Q: Are the SPI interfaces compatible?

A: Both parts use SPI protocol and operate within the same 2.7V to 5.5V supply range. However, command structures and pin assignments differ due to different package configurations.

Q: What is the impact of the higher temperature coefficient in MCP41010-I/P?

A: The MCP41010-I/P exhibits 800ppm/°C drift compared to 500ppm/°C in the WMS7204050P. Applications requiring high precision across temperature ranges must account for this 60% increase in resistance variation.

Q: Is the MCP41010-I/P suitable for new designs?

A: Yes, the MCP41010-I/P is in active production with ROHS3 compliance, making it suitable for new designs. However, application requirements must align with its single-circuit, 10kΩ, volatile-memory specifications.

Q: What packaging considerations apply?

A: The WMS7204050P uses 20-DIP (0.300", 7.62mm) with 20 pins. The MCP41010-I/P uses 8-DIP (0.300", 7.62mm) with 8 pins. Both are through-hole mounted but require different PCB layouts and socket designs.