74LCX841WM Equivalent & Substitute Parts

Part Overview

The 74LCX841WM is a D-Type Transparent Latch IC manufactured by onsemi, featuring a 10:10 circuit configuration with tri-state output capability. This component operates across a 2V to 3.6V supply voltage range and is housed in a 24-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 where legacy compatibility is required.

Substiute Parts

74LCX841WM

onsemiIn Stock: 68874LCX841WM Datasheet

Current PartRFQ

SN74LVC841ADW

Texas InstrumentsIn Stock: 1755SN74LVC841ADW Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74LCX841WM is determined by strict alignment of the following critical parameters:

• Logic Type: D-Type Transparent Latch configuration
• Circuit Configuration: 10:10 channel arrangement
• Output Type: Tri-State capability
• Package / Case: 24-SOIC form factor with identical physical dimensions
• Mounting Type: Surface Mount compatibility
• Operating Temperature Range: -40°C ~ 85°C minimum coverage
• Output Current Capability: 24mA minimum for both high and low states
• Independent Circuits: Single channel requirement

The SN74LVC841ADW from Texas Instruments satisfies all substitution criteria. While the 74LVC series operates at a lower minimum supply voltage (1.65V versus 2V), this represents an enhancement rather than a limitation, as the 74LVC841ADW remains fully compatible with the 2V ~ 3.6V operating window of the original design. The propagation delay differential (2.7ns versus 1.5ns) must be evaluated within specific application timing constraints but does not preclude functional substitution in most standard latch applications.

Parameter Comparison

Engineering Selection Recommendations

The SN74LVC841ADW is the direct functional equivalent for the obsolete 74LCX841WM. Selection of the Texas Instruments substitute is supported by:

• Identical logic architecture and circuit configuration
• Matching package footprint and mounting methodology enabling direct PCB compatibility
• Equivalent output current specifications ensuring signal integrity
• Active product status providing long-term availability and supply chain stability
• ROHS3 compliance meeting current environmental and regulatory requirements
• Extended lower supply voltage range (1.65V minimum) providing design flexibility without compromising the original 2V ~ 3.6V operating window

The propagation delay increase from 1.5ns to 2.7ns requires verification against application-specific timing budgets. In systems where the original 1.5ns specification was not a critical constraint, the SN74LVC841ADW operates as a direct replacement. For timing-critical applications, detailed analysis of setup and hold time requirements is necessary.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC841ADW be used as a direct replacement for the 74LCX841WM without PCB modifications?

A: Yes. Both components share identical 24-SOIC package dimensions and pin configurations. No PCB layout changes are required for physical substitution.

Q: What is the significance of the supply voltage range difference (2V ~ 3.6V versus 1.65V ~ 3.6V)?

A: The SN74LVC841ADW operates across a wider voltage range. Since the original design operates within 2V ~ 3.6V, the substitute remains fully compatible. The lower 1.65V minimum of the 74LVC series does not create incompatibility.

Q: How does the propagation delay difference affect circuit performance?

A: The 74LCX841WM specifies 1.5ns propagation delay while the SN74LVC841ADW specifies 2.7ns. This 1.2ns difference must be evaluated against application timing requirements. In non-critical timing applications, this difference is typically negligible. In high-speed or precision timing circuits, detailed timing analysis is required.

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

A: The SN74LVC841ADW carries ROHS3 compliance certification. Both components are REACH Unaffected and classified under ECCN EAR99. The Texas Instruments part provides enhanced regulatory documentation suitable for modern supply chain requirements.

Q: What is the inventory status of these components?

A: The 74LCX841WM is obsolete with limited remaining stock (643 pcs). The SN74LVC841ADW is an active product with established supply availability (1671 pcs in stock), ensuring long-term procurement viability.

Q: Are the output current specifications identical?

A: Yes. Both components specify 24mA output current capability for both high and low states, ensuring equivalent signal driving capability.