X9221AWSZ Digital Potentiometer Equivalent & Substitute Parts

Part Overview

The X9221AWSZ is a digital potentiometer manufactured by Renesas Electronics Corporation, classified as a Data Acquisition component. This 10kΩ dual-circuit device features a 64-tap I2C interface with non-volatile memory and linear taper configuration. The part is currently listed as obsolete, making identification of functionally equivalent substitutes essential for ongoing design support and production continuity. The X9221AWSZ operates at a fixed 5V supply voltage with a 20-SOIC surface mount package.

Substiute Parts

X9221AWSZ

Renesas Electronics CorporationIn Stock: 792X9221AWSZ Datasheet

Current PartRFQ

CAT5221WI-10-T1

onsemiIn Stock: 1597CAT5221WI-10-T1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the X9221AWSZ is determined by strict equivalence across the following critical parameters:

• Resistance value: 10kΩ
• Number of circuits: 2
• Number of taps: 64
• Interface protocol: I2C
• Memory type: Non-Volatile
• Taper characteristic: Linear
• Package type: 20-SOIC
• Mounting technology: Surface Mount

The CAT5221WI-10-T1 manufactured by onsemi meets all these core functional and mechanical requirements. Both devices share identical resistance, circuit count, tap resolution, interface specification, and package footprint. This alignment permits direct substitution in applications where the supply voltage range and operating temperature specifications are compatible with the design requirements.

Parameter Comparison

Engineering Selection Recommendations

The CAT5221WI-10-T1 serves as a functional equivalent to the obsolete X9221AWSZ based on matching core specifications: identical resistance, circuit count, tap resolution, I2C interface, non-volatile memory, linear taper, and 20-SOIC package footprint. Both devices maintain ROHS3 compliance and identical MSL ratings.

Design considerations for substitution:

The CAT5221WI-10-T1 operates across a wider supply voltage range (2.5V ~ 6V) compared to the X9221AWSZ fixed 5V specification. Applications operating at exactly 5V are fully compatible. The onsemi device supports an extended operating temperature range (-40°C ~ 85°C) versus the Renesas device (0°C ~ 70°C), providing broader environmental capability.

The wiper resistance differs between devices: X9221AWSZ at 40Ω typical versus CAT5221WI-10-T1 at 80Ω typical. This parameter affects circuit impedance and should be evaluated against application-specific requirements.

Both devices are obsolete products. The CAT5221WI-10-T1 currently maintains higher inventory availability (1536 pcs) compared to X9221AWSZ (720 pcs).

Frequently Asked Questions (FAQ)

Q: Can the CAT5221WI-10-T1 directly replace the X9221AWSZ in existing designs?

A: Direct pin-for-pin and functional replacement is supported when the application operates at 5V supply voltage and within the 0°C to 70°C temperature range. The wider voltage and temperature specifications of the CAT5221WI-10-T1 provide additional design margin. The difference in wiper resistance (40Ω vs 80Ω) must be evaluated for circuit-specific impact.

Q: What are the critical parameters that must match for substitution?

A: Substitution requires equivalence in resistance value (10kΩ), circuit count (2), tap resolution (64), interface protocol (I2C), memory type (non-volatile), taper (linear), and package type (20-SOIC). These parameters define functional compatibility.

Q: Are there supply voltage compatibility concerns?

A: The X9221AWSZ operates at fixed 5V. The CAT5221WI-10-T1 accepts 2.5V to 6V. Applications using 5V supply are fully compatible. Designs operating outside this range require the original X9221AWSZ specification.

Q: How do the wiper resistance specifications affect substitution?

A: The X9221AWSZ specifies 40Ω typical wiper resistance; the CAT5221WI-10-T1 specifies 80Ω typical. This affects circuit loading and impedance characteristics. Applications sensitive to wiper resistance must evaluate this parameter against design requirements.

Q: Are both devices RoHS compliant?

A: Both the X9221AWSZ and CAT5221WI-10-T1 are ROHS3 compliant with identical MSL ratings (3, 168 hours), supporting equivalent environmental and regulatory requirements.

Q: What is the package footprint compatibility?

A: Both devices use the 20-SOIC package (0.295", 7.50mm width), ensuring identical PCB footprint and assembly compatibility.