ISL23345TFVZ Equivalent & Substitute Parts

Part Overview

The ISL23345TFVZ is a digital potentiometer manufactured by Renesas Electronics Corporation, featuring 100k Ohm resistance with 4 circuits and 256 taps controlled via I2C interface. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part is housed in a 20-TSSOP surface mount package and operates across a supply voltage range of 1.2V to 5.5V with a temperature coefficient of 45ppm/°C.

Substiute Parts

ISL23345TFVZ

Renesas Electronics CorporationIn Stock: 719ISL23345TFVZ Datasheet

Current PartRFQ

ISL23325TFRUZ-TK

Renesas Electronics CorporationIn Stock: 896ISL23325TFRUZ-TK Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISL23345TFVZ is determined by the following critical parameters:

• Resistance value: 100k Ohm (must match exactly)
• Interface protocol: I2C (required for system compatibility)
• Supply voltage range: 1.2V ~ 5.5V or 1.7V ~ 5.5V (must encompass application requirements)
• Temperature coefficient: 45ppm/°C (must match for thermal stability)
• Operating temperature range: -40°C ~ 125°C (must meet or exceed application limits)
• Tolerance: ±20% (must match for circuit accuracy)
• Taper: Linear (must match for functional behavior)
• Memory type: Volatile (must match for operational characteristics)

The ISL23325TFRUZ-TK qualifies as a substitute despite differences in circuit count and package type, as it maintains all critical electrical parameters and interface specifications. The reduction from 4 circuits to 2 circuits and package change from 20-TSSOP to 16-UTQFN represents a functional trade-off suitable for applications requiring fewer independent potentiometer channels.

Parameter Comparison

Engineering Selection Recommendations

The ISL23325TFRUZ-TK is an active product offering superior long-term availability compared to the obsolete ISL23345TFVZ. Both parts maintain identical electrical specifications for resistance, interface protocol, supply voltage, temperature coefficient, and operating temperature range. The ISL23325TFRUZ-TK provides improved moisture sensitivity characteristics (MSL 1 versus MSL 3), reducing handling and storage constraints.

Selection of the ISL23325TFRUZ-TK requires circuit redesign to accommodate the reduction from 4 independent potentiometer circuits to 2 circuits and a package transition from 20-TSSOP to 16-UTQFN. These changes necessitate PCB layout modification and firmware adjustment to address the reduced circuit count. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the ISL23325TFRUZ-TK directly replace the ISL23345TFVZ without circuit modification?

A: No. While electrical parameters are identical, the ISL23325TFRUZ-TK provides 2 circuits instead of 4, and uses a different package (16-UTQFN versus 20-TSSOP). Applications requiring all 4 independent potentiometer channels cannot use this substitute without functional redesign.

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

A: Resistance value (100k Ohm), interface protocol (I2C), supply voltage range (1.2V ~ 5.5V or 1.7V ~ 5.5V), temperature coefficient (45ppm/°C), operating temperature range (-40°C ~ 125°C), tolerance (±20%), and memory type (Volatile) must all match between the main part and substitute.

Q: Does the ISL23325TFRUZ-TK offer any advantages over the ISL23345TFVZ?

A: The ISL23325TFRUZ-TK is an active product with unlimited production availability, whereas the ISL23345TFVZ is obsolete. Additionally, the ISL23325TFRUZ-TK has superior moisture sensitivity (MSL 1 with unlimited storage versus MSL 3 with 168-hour limit), reducing handling constraints during manufacturing and storage.

Q: Are there packaging considerations when switching from 20-TSSOP to 16-UTQFN?

A: Yes. The 16-UTQFN package (2.6x1.8mm) is smaller than the 20-TSSOP package (0.173", 4.40mm width). PCB layout redesign is required, including trace routing, via placement, and thermal management considerations specific to the new package footprint.

Q: What is the impact of reducing from 4 circuits to 2 circuits?

A: Applications using all 4 independent potentiometer channels must be redesigned to function with 2 channels. This may require additional external components, multiplexing logic, or architectural changes to the control system.