PI3USB4000BZUAEX Equivalent & Substitute Parts

Part Overview

The PI3USB4000BZUAEX is a single-circuit SPDT (Single Pole Double Throw) IC switch manufactured by Diodes Incorporated, designed for high-speed signal routing applications. This component features 8Ohm on-state resistance and operates across a 2.7V to 6V supply range with 1GHz bandwidth capability. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure long-term component availability for new production and field replacements.

Substiute Parts

PI3USB4000BZUAEX

Diodes IncorporatedIn Stock: 6241PI3USB4000BZUAEX Datasheet

Current PartRFQ

PI3USB4000AZUAEX

Diodes IncorporatedIn Stock: 17345PI3USB4000AZUAEX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI3USB4000BZUAEX is determined by the following critical parameters that must remain functionally equivalent:

Mandatory Matching Parameters:

• On-State Resistance (Max): 8Ohm
• Channel-to-Channel Matching (ΔRon): 500mOhm
• Voltage - Supply, Single (V+): 2.7V ~ 6V
• -3dB Bandwidth: 1GHz
• Current - Leakage (IS(off)) (Max): 1µA
• Crosstalk: -35dB @ 240MHz
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 10-UFQFN (1.5x2)
• Number of Circuits: 1

Allowable Variations:

• Switch Circuit configuration (SPDT to DPDT) when multiplexer/demultiplexer functionality remains compatible
• Channel Capacitance values within acceptable signal integrity margins
• Product Status transition from Obsolete to Active

The PI3USB4000AZUAEX qualifies as a direct substitute based on these criteria, with the primary distinction being its DPDT configuration and active product status.

Parameter Comparison

Engineering Selection Recommendations

The PI3USB4000AZUAEX is the manufacturer-recommended substitute for the obsolete PI3USB4000BZUAEX. Both components maintain identical electrical performance across critical parameters including on-state resistance, bandwidth, leakage current, and crosstalk specifications. Both parts are ROHS3 compliant with MSL Level 1 rating, ensuring equivalent environmental and regulatory compliance.

The transition from SPDT to DPDT configuration and from 2:1 to 1:2 multiplexer topology represents a functional enhancement rather than a limitation. The PI3USB4000AZUAEX's active product status ensures ongoing availability and manufacturing support, eliminating supply chain risk associated with obsolete components.

Frequently Asked Questions (FAQ)

Q: Can the PI3USB4000AZUAEX directly replace the PI3USB4000BZUAEX in existing designs?

A: Yes. Both components share identical on-state resistance (8Ohm), bandwidth (1GHz), leakage current (1µA), and operating temperature range (-40°C to 85°C). The package footprint (10-UFQFN 1.5x2) is identical, enabling direct PCB-level substitution. The DPDT configuration of the substitute provides equivalent or enhanced functionality compared to the SPDT original.

Q: What is the difference between SPDT and DPDT configurations in this context?

A: SPDT (Single Pole Double Throw) provides one switching circuit with two throw positions. DPDT (Double Pole Double Throw) provides two independent switching circuits. The PI3USB4000AZUAEX's DPDT configuration maintains single-circuit operation while offering architectural flexibility. The 2:1 to 1:2 multiplexer transition reflects equivalent signal routing capability.

Q: Are there any compliance or certification differences between these parts?

A: No. Both components are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating. Both are unaffected by REACH regulations and classified under identical ECCN and HTSUS codes.

Q: What is the impact of the channel capacitance difference (5pF vs 7pF)?

A: The PI3USB4000AZUAEX exhibits slightly higher source capacitance (7pF vs 5pF) while maintaining identical drain capacitance (9pF). This 2pF difference remains within acceptable signal integrity margins for applications operating at the specified 1GHz bandwidth and does not compromise functional equivalence.

Q: Why is the original part classified as obsolete?

A: Obsolescence reflects end-of-life status from the manufacturer. The PI3USB4000AZUAEX, as an active product, provides continuity for new designs and ongoing production requirements while maintaining full electrical and mechanical compatibility.