SN74LVC861ADWR Equivalent & Substitute Parts

Part Overview

The SN74LVC861ADWR is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments, designed for 3-state output applications in the 74LVC series. This device operates across a supply voltage range of 1.65V to 3.6V and is housed in a 24-SOIC surface mount package. The SN74LVC861ADWR is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

SN74LVC861ADWR

Texas InstrumentsIn Stock: 1077SN74LVC861ADWR Datasheet

Current PartRFQ

SN74LVC543ADWR

Texas InstrumentsIn Stock: 12022SN74LVC543ADWR Datasheet

Parametric EquivalentRFQ

SN74LVC652ADWR

Texas InstrumentsIn Stock: 4949SN74LVC652ADWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LVC861ADWR are identified based on strict parametric equivalence within the following criteria:

Mandatory Matching Parameters:

• Manufacturer: Texas Instruments
• Series: 74LVC
• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Output Type: 3-State
• Current - Output High, Low: 24mA, 24mA
• Voltage - Supply: 1.65V ~ 3.6V
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 24-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation:

• Number of Bits per Element: The SN74LVC861ADWR operates with 10 bits per element. Substitute parts with 8 bits per element are functionally compatible when the application does not require the full 10-bit capacity, as the core transceiver architecture and electrical characteristics remain equivalent.

Product Status Consideration: Substitute parts with Active product status provide superior long-term availability and supply chain reliability compared to the obsolete SN74LVC861ADWR.

Parameter Comparison

Engineering Selection Recommendations

Both SN74LVC543ADWR and SN74LVC652ADWR are parametrically equivalent to the SN74LVC861ADWR across all critical electrical and mechanical specifications. The primary distinction between the main part and substitute parts is the reduction from 10 bits per element to 8 bits per element, which is acceptable for applications not requiring the full 10-bit capacity.

The substitute parts offer significant advantages in terms of product lifecycle status. Both SN74LVC543ADWR and SN74LVC652ADWR maintain Active product status with Texas Instruments, ensuring continued availability, manufacturing support, and compliance with current industry standards. The SN74LVC861ADWR, classified as Obsolete, presents supply chain risk and potential discontinuation of technical support.

All three parts maintain identical RoHS3 compliance and MSL ratings, confirming suitability for standard surface mount assembly processes and environmental requirements. The 24-SOIC package footprint is identical across all variants, permitting direct board-level substitution without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC543ADWR or SN74LVC652ADWR directly replace the SN74LVC861ADWR on existing PCBs?

A: Yes. Both substitute parts share identical package geometry (24-SOIC), pinout compatibility within the transceiver architecture, and equivalent electrical performance. Direct board-level substitution is possible without PCB modification.

Q: What is the functional difference between the 10-bit SN74LVC861ADWR and the 8-bit substitute parts?

A: The SN74LVC861ADWR processes 10 data bits per transceiver element, while SN74LVC543ADWR and SN74LVC652ADWR process 8 data bits per element. For applications requiring only 8-bit data width, the substitute parts provide full functional equivalence. Applications requiring 10-bit capacity must retain the SN74LVC861ADWR or implement alternative solutions.

Q: Why is the SN74LVC861ADWR classified as Obsolete?

A: Obsolete status indicates that Texas Instruments has discontinued active manufacturing and support for this part number. Substitute parts with Active status ensure ongoing availability and compliance with current manufacturing standards.

Q: Are the electrical characteristics identical between the main part and substitutes?

A: Yes. Supply voltage range (1.65V ~ 3.6V), output current capability (24mA high and low), operating temperature range (-40°C ~ 85°C), and 3-state output functionality are identical across all three parts.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. All three parts are ROHS3 compliant with MSL rating of 1 (Unlimited), confirming equivalent environmental and manufacturing compliance standards.

Q: What is the difference between SN74LVC543ADWR and SN74LVC652ADWR?

A: Both parts are parametrically identical in all electrical and mechanical specifications provided. Selection between these two substitutes should be based on inventory availability and supplier preference, as they offer equivalent performance and compatibility.