74VCX245BQX Equivalent & Substitute Parts

Part Overview

The 74VCX245BQX is a non-inverting transceiver IC manufactured by onsemi, designed for 3-state output logic applications. This device operates across a supply voltage range of 1.4V to 3.6V and is housed in a 20-DQFN (2.5x4.5) surface mount package. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this transceiver functionality.

Substiute Parts

74VCX245BQX

onsemiIn Stock: 141974VCX245BQX Datasheet

Current PartRFQ

74ALVC245BQ,115

Nexperia USA Inc.In Stock: 416774ALVC245BQ,115 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74VCX245BQX is determined by the following critical parameters:

• Logic Function: Non-inverting transceiver with 1 element, 8 bits per element, and 3-state output capability
• Electrical Performance: Output current capability of 24mA (high and low), operating temperature range of -40°C to 85°C
• Supply Voltage Compatibility: The substitute must operate within or encompass the 1.4V to 3.6V supply range
• Package Compatibility: Surface mount technology with exposed pad configuration
• Compliance: ROHS3 compliance and MSL Level 1 rating

The 74ALVC245BQ,115 from Nexperia USA Inc. meets these substitution criteria. Both devices share identical logic functionality, output current specifications, operating temperature range, and compliance certifications. The supply voltage range of the substitute (1.65V ~ 3.6V) encompasses the critical upper operating point while maintaining compatibility with standard 3.3V and lower voltage applications.

Parameter Comparison

Engineering Selection Recommendations

The 74ALVC245BQ,115 is the qualified substitute for the 74VCX245BQX. Selection of this substitute is supported by:

• Functional Equivalence: Identical transceiver architecture, bit width, and output configuration
• Electrical Compatibility: Matching output current specifications and operating temperature range ensure drop-in functionality
• Supply Voltage Consideration: The substitute operates at a minimum of 1.65V, which is compatible with standard 3.3V and lower voltage logic systems. Applications requiring operation below 1.65V must evaluate the 1.4V minimum specification of the original part
• Product Status: The substitute is in Active production status, ensuring long-term availability and supply chain stability
• Compliance Alignment: Both devices maintain ROHS3 compliance and MSL Level 1 rating, supporting equivalent environmental and regulatory requirements

Frequently Asked Questions (FAQ)

Q: Can the 74ALVC245BQ,115 directly replace the 74VCX245BQX in all applications?

A: The 74ALVC245BQ,115 is functionally and electrically equivalent for applications operating at supply voltages of 1.65V and above. Applications requiring operation below 1.65V must retain the original 74VCX245BQX.

Q: What is the difference between the package designations 20-DQFN and 20-DHVQFN?

A: Both packages are 20-pin QFN variants with exposed pads. The 20-DQFN (2.5x4.5) and 20-DHVQFN (4.5x2.5) differ in physical dimensions but maintain electrical and functional compatibility. PCB layout and footprint design must accommodate the specific package dimensions.

Q: Why is the 74VCX245BQX listed as Last Time Buy?

A: Last Time Buy status indicates that onsemi has discontinued production of this part. The 74ALVC245BQ,115 from Nexperia USA Inc. provides an active production alternative with equivalent specifications.

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

A: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating. No compliance or certification differences exist between the two devices.

Q: What supply voltage range should be used for safe operation with the substitute?

A: The 74ALVC245BQ,115 operates safely across 1.65V to 3.6V. For applications requiring the extended lower voltage range of 1.4V to 1.65V, the original 74VCX245BQX must be used.