74LCX841MSA Equivalent & Substitute Parts

Part Overview

The 74LCX841MSA is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring a 10:10 circuit configuration with tri-state output capability. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74LCX841MSA operates within a 2V to 3.6V supply voltage range and is packaged in a 24-SSOP surface mount configuration with a 5.30mm width.

Substiute Parts

74LCX841MSA

onsemiIn Stock: 72074LCX841MSA Datasheet

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SN74LVC841ADBR

Texas InstrumentsIn Stock: 764SN74LVC841ADBR Datasheet

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SN74LVC841APW

Texas InstrumentsIn Stock: 788SN74LVC841APW Datasheet

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SN74LVC841APWR

Texas InstrumentsIn Stock: 18236SN74LVC841APWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74LCX841MSA are qualified based on the following electrical and mechanical parameters:

Core Substitution Criteria:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 10:10
• Output Type: Tri-State
• Independent Circuits: 1
• Current - Output High, Low: 24mA, 24mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Voltage Compatibility: Substitute parts must operate within voltage ranges that encompass or exceed the original 2V ~ 3.6V specification. The qualified substitutes operate at 1.65V ~ 3.6V, providing extended low-voltage capability while maintaining full compatibility with the original operating range.

Package Compatibility: Substitutes are available in two package variants: 24-SSOP (matching the original) and 24-TSSOP (mechanically compatible alternative with different pitch specifications).

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The 74LCX841MSA is classified as obsolete. All three substitute parts from Texas Instruments (SN74LVC841ADBR, SN74LVC841APW, SN74LVC841APWR) maintain active product status, ensuring long-term availability and continued manufacturing support.

Compliance and Certifications: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original 74LCX841MSA does not specify RoHS compliance status.

Package Selection: For direct PCB compatibility with existing 24-SSOP layouts, the SN74LVC841ADBR provides an identical package footprint. For designs that can accommodate 24-TSSOP packaging, both SN74LVC841APW and SN74LVC841APWR are available, with SN74LVC841APWR offering significantly higher inventory availability (18,130 pieces) compared to SN74LVC841APW (771 pieces).

Electrical Performance: All substitutes maintain identical output current specifications (24mA, 24mA) and operating temperature range (-40°C ~ 85°C). The propagation delay increases from 1.5ns to 2.7ns in the Texas Instruments alternatives, which remains within acceptable timing margins for most applications using D-Type transparent latches.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC841APWR replace the 74LCX841MSA directly on the PCB?

A: The SN74LVC841APWR uses a 24-TSSOP package (0.173", 4.40mm width) while the 74LCX841MSA uses 24-SSOP (0.209", 5.30mm width). These packages have different pitch specifications and are not mechanically interchangeable on the same PCB footprint. For direct PCB replacement, use SN74LVC841ADBR, which matches the 24-SSOP package.

Q: What is the voltage compatibility between the original and substitute parts?

A: The 74LCX841MSA operates at 2V ~ 3.6V. All three substitutes operate at 1.65V ~ 3.6V, providing extended low-voltage operation. Designs using the original part at 2V or higher will function identically with any substitute.

Q: Are there differences in propagation delay between the original and substitutes?

A: Yes. The 74LCX841MSA has a propagation delay of 1.5ns, while all Texas Instruments substitutes have 2.7ns. This 1.2ns difference must be evaluated against system timing requirements, though for most latch applications this remains acceptable.

Q: Which substitute offers the best availability?

A: The SN74LVC841APWR in 24-TSSOP packaging has the highest inventory availability at 18,130 pieces. If 24-SSOP packaging is required, SN74LVC841ADBR has 751 pieces available.

Q: Are all substitutes RoHS compliant?

A: Yes. All three Texas Instruments substitutes are ROHS3 compliant. The original 74LCX841MSA does not specify RoHS compliance status.

Q: What are the key electrical parameters that must match for substitution?

A: The critical matching parameters are: D-Type Transparent Latch logic type, 10:10 circuit configuration, tri-state output, 24mA output current capability, -40°C ~ 85°C operating temperature range, and surface mount mounting type. All qualified substitutes meet these specifications.