74VCX2245BQX Equivalent & Substitute Parts

Part Overview

The 74VCX2245BQX is a non-inverting transceiver IC manufactured by onsemi, designed for 8-bit data bus applications with 3-state output capability. This component operates across a supply voltage range of 1.4V to 3.6V and is housed in a 20-DQFN (2.5x4.5mm) surface mount package. The product is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity.

Substiute Parts

74VCX2245BQX

onsemiIn Stock: 81474VCX2245BQX Datasheet

Current PartRFQ

SN74ALVCH245PWR

Texas InstrumentsIn Stock: 2214SN74ALVCH245PWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74VCX2245BQX is determined by the following critical parameters:

• Logic function: Non-inverting transceiver with 1 element and 8 bits per element
• Output configuration: 3-state output capability
• Supply voltage compatibility: Minimum 1.4V to maximum 3.6V operating range
• Output current drive: 24mA high and low drive capability
• Operating temperature range: -40°C to 85°C
• Package type: Surface mount configuration with 20-pin count
• Electrical performance: Functional equivalence in data bus switching and signal integrity

The SN74ALVCH245PWR from Texas Instruments meets these substitution criteria through matching logic architecture, output characteristics, and operating specifications, despite differences in package form factor and supply voltage minimum threshold.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALVCH245PWR is an active product from Texas Instruments with established supply chain availability and ongoing manufacturer support. The 74VCX2245BQX obsolescence status makes the SN74ALVCH245PWR the primary selection for new designs and production continuity. Both components share identical logic function, output drive capability, operating temperature range, and regulatory compliance classifications (REACH Unaffected, EAR99 export control).

The SN74ALVCH245PWR operates at a minimum supply voltage of 1.65V compared to 1.4V for the 74VCX2245BQX. This represents a 0.25V higher threshold and must be evaluated against specific circuit requirements. The package form factor differs (20-TSSOP versus 20-DQFN), requiring PCB layout modification for direct substitution. Both components maintain MSL Level 1 moisture sensitivity classification and identical HTSUS commodity codes.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALVCH245PWR directly replace the 74VCX2245BQX in existing designs?

A: Functional substitution is possible based on matching logic architecture and electrical performance. However, the package form factor differs (20-TSSOP versus 20-DQFN), requiring PCB redesign. The minimum supply voltage threshold increases from 1.4V to 1.65V, which must be verified against circuit operating conditions.

Q: What are the key electrical differences between these parts?

A: Both components provide identical 8-bit non-inverting transceiver functionality with 3-state outputs and 24mA output drive capability. The primary difference is the minimum supply voltage specification: 1.4V for the 74VCX2245BQX versus 1.65V for the SN74ALVCH245PWR. Operating temperature range and output current characteristics are identical.

Q: Why is the 74VCX2245BQX classified as obsolete?

A: Manufacturer discontinuation of the 74VCX2245BQX necessitates transition to active alternatives. The SN74ALVCH245PWR provides equivalent functionality with ongoing manufacturer support and supply availability.

Q: Are there package considerations for substitution?

A: Yes. The 74VCX2245BQX uses a 20-DQFN (2.5x4.5mm) package, while the SN74ALVCH245PWR uses a 20-TSSOP package. These are not pin-compatible without PCB layout modification. Footprint redesign is required for physical substitution.

Q: Do both parts meet the same regulatory and compliance standards?

A: Both components share identical REACH status (REACH Unaffected), ECCN classification (EAR99), HTSUS commodity code (8542.39.0001), and MSL Level 1 moisture sensitivity rating. Regulatory compliance is equivalent.