PI4ULS3V08ZFEX Equivalent & Substitute Parts

Part Overview

The PI4ULS3V08ZFEX is a voltage level translator manufactured by Diodes Incorporated, designed for bidirectional signal translation across different voltage domains. This device features 2 circuits with 4 channels per circuit, supporting data rates up to 180 Mbps with auto-direction sensing capability. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

PI4ULS3V08ZFEX

Diodes IncorporatedIn Stock: 2385PI4ULS3V08ZFEX Datasheet

Current PartRFQ

TXB0304RUTR

Texas InstrumentsIn Stock: 38308TXB0304RUTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI4ULS3V08ZFEX is determined by the following critical parameters:

• Translator Type & Channel Configuration: Bidirectional voltage level translation with tri-state, non-inverted output
• Voltage Operating Range: VCCA and VCCB supply voltage compatibility (1.2 V ~ 3.6 V minimum requirement)
• Data Rate Performance: Minimum 180 Mbps capability for signal integrity
• Auto-Direction Sensing: Required functional feature for autonomous operation
• Surface Mount Packaging: Physical form factor compatibility
• Compliance Standards: ROHS3 compliance and MSL rating

The TXB0304RUTR from Texas Instruments qualifies as a manufacturer-recommended substitute based on core functional equivalence in voltage level translation, bidirectional channel operation, and auto-direction sensing capability.

Parameter Comparison

Engineering Selection Recommendations

The TXB0304RUTR is designated as the manufacturer-recommended substitute for the obsolete PI4ULS3V08ZFEX. Both devices maintain ROHS3 compliance and identical MSL ratings, ensuring regulatory and environmental compatibility.

Key considerations for selection:

• Circuit Count Difference: The PI4ULS3V08ZFEX provides 2 circuits (8 total channels), while the TXB0304RUTR provides 1 circuit (4 channels). Applications requiring 8 channels may necessitate multiple TXB0304RUTR devices or alternative multi-circuit solutions.
• Data Rate: The substitute operates at 100 Mbps versus the original 180 Mbps. Applications with data rate requirements below 100 Mbps are fully compatible; higher-speed applications require evaluation.
• Voltage Range: The TXB0304RUTR supports a wider voltage range (0.9 V ~ 3.6 V), providing greater flexibility for low-voltage applications.
• Package Form Factor: The 12-UFQFN package of the substitute differs from the 36-WFQFN of the original, requiring PCB layout redesign.
• Product Status: The TXB0304RUTR maintains active product status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the TXB0304RUTR directly replace the PI4ULS3V08ZFEX without PCB modifications?

A: No. The TXB0304RUTR uses a 12-UFQFN package compared to the 36-WFQFN of the original part, requiring PCB footprint redesign and layout changes.

Q: What is the impact of the lower 100 Mbps data rate on my application?

A: The substitute's 100 Mbps rating is suitable for applications operating below this threshold. Applications requiring 180 Mbps performance must evaluate alternative solutions or confirm that actual signal speeds remain within the 100 Mbps specification.

Q: Does the TXB0304RUTR provide equivalent channel capacity?

A: No. The original part provides 2 circuits with 4 channels each (8 total channels), while the substitute provides 1 circuit with 4 channels. Multi-channel applications may require multiple substitute devices or alternative multi-circuit translators.

Q: Are both parts compliant with the same environmental and regulatory standards?

A: Yes. Both the PI4ULS3V08ZFEX and TXB0304RUTR are ROHS3 compliant with MSL rating 1 (Unlimited), ensuring equivalent environmental and regulatory compatibility.

Q: What voltage ranges are supported by the substitute?

A: The TXB0304RUTR supports VCCA and VCCB ranges of 0.9 V ~ 3.6 V, which encompasses the original part's 1.2 V ~ 3.6 V range and extends compatibility to lower voltage applications.