WMS7202010P Equivalent & Substitute Parts

Part Overview

The WMS7202010P is a digital potentiometer manufactured by Nuvoton Technology Corporation, configured as a 10kΩ dual-circuit device with 256 taps and SPI interface control. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and production continuity. The part operates across a 2.7V to 5.5V supply range with non-volatile memory retention and through-hole 14-DIP packaging.

Substiute Parts

WMS7202010P

Nuvoton Technology CorporationIn Stock: 968WMS7202010P Datasheet

Current PartRFQ

MCP42010-I/P

Microchip TechnologyIn Stock: 1328MCP42010-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WMS7202010P is determined by strict equivalence across the following parameters: resistance value (10kΩ), circuit count (2), tap resolution (256), SPI interface protocol, supply voltage compatibility (2.7V ~ 5.5V), package form factor (14-DIP), and operating temperature range (-40°C ~ 85°C). The MCP42010-I/P meets all these core electrical and mechanical requirements, establishing it as a direct functional equivalent despite differences in memory type (volatile vs. non-volatile) and temperature coefficient specifications.

Parameter Comparison

Engineering Selection Recommendations

The MCP42010-I/P is the designated substitute for the obsolete WMS7202010P. Both devices share identical electrical specifications for resistance, tap count, circuit configuration, interface protocol, and supply voltage range. The MCP42010-I/P maintains active product status with ROHS3 compliance, providing supply chain continuity and regulatory alignment for new designs and production restocking.

The primary technical distinction is memory type: the WMS7202010P retains settings through power cycles via non-volatile storage, while the MCP42010-I/P requires continuous SPI commands to maintain wiper positions. Applications dependent on power-loss retention must implement firmware-level state management with the MCP42010-I/P. The MCP42010-I/P exhibits a higher temperature coefficient (800ppm/°C vs. 500ppm/°C), which may impact precision applications requiring tight temperature stability.

Frequently Asked Questions (FAQ)

Q: Can the MCP42010-I/P directly replace the WMS7202010P in existing PCB layouts?

A: Yes. Both devices use identical 14-DIP through-hole packaging with 0.300" (7.62mm) body dimensions and pin-compatible SPI interfaces. No PCB modifications are required for physical substitution.

Q: What is the impact of switching from non-volatile to volatile memory?

A: The WMS7202010P preserves wiper positions after power removal. The MCP42010-I/P requires the microcontroller to rewrite wiper settings after each power cycle. Applications must implement initialization routines to restore desired resistance values on startup.

Q: Are the supply voltage ranges identical?

A: Yes. Both parts operate across 2.7V to 5.5V, ensuring compatibility with 3.3V and 5V logic systems without modification.

Q: How does the temperature coefficient difference affect circuit performance?

A: The MCP42010-I/P exhibits 800ppm/°C versus the WMS7202010P's 500ppm/°C. In applications spanning the full -40°C to 85°C range (125°C span), the MCP42010-I/P introduces approximately 0.1% additional resistance drift per 10°C change. Precision analog circuits may require calibration adjustments.

Q: Is the MCP42010-I/P RoHS compliant?

A: Yes. The MCP42010-I/P is ROHS3 compliant, whereas the WMS7202010P is non-compliant. This supports regulatory requirements for new product certifications and procurement policies.

Q: What is the wiper resistance difference?

A: The WMS7202010P specifies 80Ω typical wiper resistance; the MCP42010-I/P specifies 73Ω. This 7Ω difference is negligible in most applications but should be verified in precision measurement circuits.