74VCXH245WM Equivalent & Substitute Parts

Part Overview

The 74VCXH245WM is a non-inverting transceiver IC manufactured by onsemi, designed for 8-bit data bus applications with 3-state output capability. This device operates across a supply voltage range of 1.2V to 3.6V and is housed in a 20-SOIC surface mount package. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

74VCXH245WM

onsemiIn Stock: 94374VCXH245WM Datasheet

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SN74ALVCH245DW

Texas InstrumentsIn Stock: 1324SN74ALVCH245DW Datasheet

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SN74ALVCH245DWR

Texas InstrumentsIn Stock: 2922SN74ALVCH245DWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74VCXH245WM is determined by strict equivalence across the following critical parameters:

• Logic function: Non-inverting transceiver with 1 element, 8 bits per element
• Output configuration: 3-state output
• Output drive capability: 24mA high and low
• Package type: 20-SOIC surface mount
• Operating temperature range: -40°C to 85°C
• Moisture sensitivity: MSL 1 (Unlimited)

The substitute parts identified (SN74ALVCH245DW and SN74ALVCH245DWR) maintain functional and electrical equivalence across all these parameters. Both substitute parts are manufactured by Texas Instruments and belong to the 74ALVCH series. The primary difference between the two substitutes is packaging format: SN74ALVCH245DW is supplied in tube packaging, while SN74ALVCH245DWR is supplied in tape and reel format. Both are pin-compatible and functionally interchangeable with the original 74VCXH245WM.

Parameter Comparison

Engineering Selection Recommendations

Both SN74ALVCH245DW and SN74ALVCH245DWR are direct functional replacements for the obsolete 74VCXH245WM. Selection between the two Texas Instruments alternatives depends on procurement and assembly requirements:

SN74ALVCH245DW is appropriate for applications requiring tube packaging, suitable for lower-volume production runs or manual assembly processes.

SN74ALVCH245DWR is appropriate for high-volume automated assembly operations utilizing tape and reel feeding systems.

Both substitute parts carry active product status from Texas Instruments and maintain ROHS3 compliance, providing long-term supply chain stability. The minimum supply voltage specification for the Texas Instruments alternatives is 1.65V compared to 1.2V for the original part; this difference is not significant for most applications operating at standard logic voltage levels (3.3V or 5V with appropriate level shifting).

Frequently Asked Questions (FAQ)

Q: Are SN74ALVCH245DW and SN74ALVCH245DWR pin-compatible with 74VCXH245WM?

A: Yes. Both substitute parts maintain identical pin configuration and 20-SOIC package dimensions (0.295", 7.50mm width), enabling direct socket replacement without PCB modification.

Q: What is the difference between SN74ALVCH245DW and SN74ALVCH245DWR?

A: The functional and electrical specifications are identical. The difference is packaging format: SN74ALVCH245DW is supplied in tube packaging for manual handling, while SN74ALVCH245DWR is supplied in tape and reel format for automated pick-and-place assembly.

Q: Does the minimum supply voltage difference (1.2V vs 1.65V) affect compatibility?

A: For standard logic applications operating at 3.3V or 5V supply levels, this difference is not functionally significant. Applications specifically designed to operate at 1.2V supply voltage would require verification of the Texas Instruments device performance at that voltage level.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both SN74ALVCH245DW and SN74ALVCH245DWR are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What is the moisture sensitivity level for these parts?

A: All three parts (original and substitutes) carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.