74LCXH2245WM Equivalent & Substitute Parts

Part Overview

The 74LCXH2245WM 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 2V to 3.6V supply voltage range and is housed in a 20-SOIC package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

74LCXH2245WM

onsemiIn Stock: 77174LCXH2245WM Datasheet

Current PartRFQ

MC74LCX245DWG

onsemiIn Stock: 2902MC74LCX245DWG Datasheet

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MC74LCX245DWR2G

onsemiIn Stock: 2935MC74LCX245DWR2G Datasheet

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74LVC2245AD,118

Nexperia USA Inc.In Stock: 307874LVC2245AD,118 Datasheet

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TC74LCX245F(EL,K,F

Toshiba Semiconductor and StorageIn Stock: 1072TC74LCX245F(EL,K,F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74LCXH2245WM is determined by the following critical parameters:

• Logic Function: All substitutes must be non-inverting transceivers with 1 element and 8 bits per element
• Output Configuration: 3-state output capability is mandatory
• Package Compatibility: 20-SOIC package form factor with 0.295" (7.50mm) width
• Electrical Compatibility: Supply voltage range must encompass or exceed the original 2V to 3.6V specification
• Output Current: Minimum 24mA output drive capability (high and low)
• Operating Temperature: Must support at least the -40°C to 85°C range

The following parts meet these substitution criteria:

1. MC74LCX245DWG (onsemi) - Active status, extended voltage range
2. MC74LCX245DWR2G (onsemi) - Active status, extended voltage range
3. 74LVC2245AD,118 (Nexperia USA Inc.) - Active status, lower voltage operation
4. TC74LCX245F(EL,K,F (Toshiba Semiconductor and Storage) - Active status, compact package variant

Parameter Comparison

Engineering Selection Recommendations

MC74LCX245DWG and MC74LCX245DWR2G are the primary substitutes for the 74LCXH2245WM. Both parts are manufactured by onsemi with active product status, ensuring long-term availability and supply chain stability. These devices extend the supply voltage range to 5.5V while maintaining full backward compatibility with the original 2V to 3.6V operating window. Both achieve ROHS3 compliance and support expanded operating temperature ranges (-55°C to 125°C), providing enhanced reliability margins for demanding applications. The primary distinction between these two variants is packaging format: MC74LCX245DWG is supplied in tube packaging, while MC74LCX245DWR2G is supplied in cut tape format.

74LVC2245AD,118 from Nexperia USA Inc. offers an alternative with active product status and ROHS3 compliance. This part operates across a lower voltage range (1.2V to 3.6V) and provides reduced output current (12mA versus 24mA). The 74LVC2245AD,118 maintains MSL Level 1 rating, matching the original part's moisture sensitivity specification. This substitute is suitable for applications where lower output drive requirements are acceptable and extended low-voltage operation is beneficial.

TC74LCX245F(EL,K,F from Toshiba Semiconductor and Storage provides an active-status alternative with RoHS compliance. This variant features a more compact 20-SOP package (0.209" width versus 0.295" width) while maintaining 24mA output current capability. The narrower package footprint may require PCB layout modifications but offers space optimization for density-constrained designs. Operating temperature range matches the original specification (-40°C to 85°C).

All substitute parts maintain the critical functional parameters: non-inverting transceiver logic, 1 element with 8 bits per element, 3-state output configuration, and 20-SOIC package family compatibility.

Frequently Asked Questions (FAQ)

Q: Can MC74LCX245DWG or MC74LCX245DWR2G be used as direct replacements for 74LCXH2245WM?

A: Yes. Both parts are functionally equivalent transceivers with identical logic configuration (1 element, 8 bits, non-inverting, 3-state output) and matching 24mA output current. The extended supply voltage range (2V to 5.5V) and expanded operating temperature (-55°C to 125°C) provide enhanced operational margins while maintaining full compatibility within the original 2V to 3.6V specification window. Both are housed in the same 20-SOIC package form factor.

Q: What is the difference between MC74LCX245DWG and MC74LCX245DWR2G?

A: These parts are electrically identical. The distinction is packaging format: MC74LCX245DWG is supplied in tube packaging, while MC74LCX245DWR2G is supplied in cut tape format. Selection depends on assembly process requirements and inventory management preferences.

Q: Why does 74LVC2245AD,118 have lower output current (12mA versus 24mA)?

A: The 74LVC2245AD,118 is designed for lower-power applications and operates across a wider voltage range (1.2V to 3.6V). The reduced output current specification reflects this design optimization. This part is suitable for applications where 12mA drive capability is sufficient and extended low-voltage operation is required.

Q: Is the TC74LCX245F(EL,K,F package compatible with the original 74LCXH2245WM footprint?

A: The TC74LCX245F(EL,K,F uses a narrower 20-SOP package (0.209" width) compared to the original 20-SOIC package (0.295" width). While both are 20-pin SOIC variants, the reduced width requires PCB layout modification. Pin count and function remain identical, but physical footprint adjustment is necessary for board-level integration.

Q: Are all substitute parts RoHS compliant?

A: Yes. MC74LCX245DWG and MC74LCX245DWR2G are ROHS3 compliant. The 74LVC2245AD,118 is ROHS3 compliant. The TC74LCX245F(EL,K,F is RoHS compliant. All substitutes meet current environmental and regulatory requirements.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: The original 74LCXH2245WM and 74LVC2245AD,118 both carry MSL Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling. MC74LCX245DWG and MC74LCX245DWR2G carry MSL Level 3 (168 Hours), requiring controlled humidity storage and bake-out procedures before reflow soldering. TC74LCX245F(EL,K,F carries MSL Level 1. MSL Level 3 parts require more stringent handling protocols but are otherwise functionally equivalent.

Q: Which substitute offers the best long-term availability?

A: MC74LCX245DWG and MC74LCX245DWR2G, both manufactured by onsemi with active product status, offer the strongest long-term availability assurance. These parts are direct onsemi successors to the obsolete 74LCXH2245WM and represent the manufacturer's current production line for this functional category.