74VCX08BQX Equivalent & Substitute Parts

Part Overview

The 74VCX08BQX is a 4-channel AND gate logic IC manufactured by onsemi, housed in a 14-DQFN (3x2.5) surface mount package. This component operates across a supply voltage range of 1.2V to 3.6V and is designed for low-power digital logic applications. The part carries Last Time Buy status, indicating it is no longer in active production. Identifying equivalent and substitute parts is essential for design continuity, long-term availability, and supply chain planning.

Substiute Parts

74VCX08BQX

onsemiIn Stock: 2411374VCX08BQX Datasheet

Current PartRFQ

74ALVC08BQ,115

Nexperia USA Inc.In Stock: 368474ALVC08BQ,115 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74VCX08BQX is determined by the following critical parameters:

• Logic function: 4-channel AND gate with 2 inputs per channel
• Supply voltage compatibility: Substitute must operate within or encompass the 1.2V ~ 3.6V range
• Output drive capability: 24mA minimum for both high and low states
• Quiescent current: Maximum 20 µA
• Propagation delay: Performance at 3.3V supply with specified load capacitance
• Operating temperature range: -40°C ~ 85°C
• Surface mount packaging with 14-pin VFQFN configuration
• RoHS3 compliance and MSL Level 1 rating

The 74ALVC08BQ,115 meets these substitution criteria as an active production alternative from Nexperia USA Inc., offering compatible logic function, electrical performance, and environmental specifications.

Parameter Comparison

Engineering Selection Recommendations

The 74ALVC08BQ,115 is a direct functional substitute for the 74VCX08BQX. Both parts share identical logic configuration, output drive specifications, and environmental ratings. The 74ALVC08BQ,115 maintains ROHS3 compliance and MSL Level 1 classification, ensuring compatibility with standard manufacturing and storage requirements.

The primary distinction is product status: the 74VCX08BQX is Last Time Buy, while the 74ALVC08BQ,115 is in active production. This makes the 74ALVC08BQ,115 the preferred choice for new designs and long-term supply assurance. The minimum supply voltage for the 74ALVC08BQ,115 is 1.65V compared to 1.2V for the 74VCX08BQX; designs operating below 1.65V must retain the 74VCX08BQX or verify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the 74ALVC08BQ,115 directly replace the 74VCX08BQX in existing designs?

A: Yes, for applications operating at supply voltages of 1.65V or higher. Both parts provide identical logic function, output drive capability, and operating temperature range. Designs using supply voltages between 1.2V and 1.65V require the 74VCX08BQX or alternative evaluation.

Q: What are the package differences between these parts?

A: Both parts use 14-pin VFQFN packages with exposed pads. The 74VCX08BQX uses a 3x2.5mm footprint, while the 74ALVC08BQ,115 uses a 2.5x3mm footprint. These dimensions are functionally equivalent for PCB layout purposes, though physical placement may require minor adjustments.

Q: Are there differences in propagation delay performance?

A: The 74ALVC08BQ,115 exhibits faster propagation delay (2ns at 3.3V, 50pF) compared to the 74VCX08BQX (2.8ns at 3.3V, 30pF). This represents improved performance and is suitable for timing-critical applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 74VCX08BQX and 74ALVC08BQ,115 are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 ratings. Both are classified under ECCN EAR99 and HTSUS 8542.39.0001.

Q: Why is the 74VCX08BQX marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued active production. Existing inventory may be available, but no future manufacturing is planned. The 74ALVC08BQ,115 provides continuity for ongoing and future production requirements.