SN74ABT861NT Equivalent & Substitute Parts

Part Overview

The SN74ABT861NT is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments. It functions as a 1-element, 10-bit per element transceiver with 3-state output capability, designed for 4.5V to 5.5V supply voltage operation. The device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and component procurement.

Substiute Parts

SN74ABT861NT

Texas InstrumentsIn Stock: 1011SN74ABT861NT Datasheet

Current PartRFQ

SN74ABT861DW

Texas InstrumentsIn Stock: 786SN74ABT861DW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ABT861NT is determined by equivalence in the following critical parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 10
• Output Type: 3-State
• Current - Output High, Low: 32mA, 64mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C (TA)
• Base Product Number: 74ABT861

The SN74ABT861DW qualifies as a manufacturer-recommended substitute. While it differs in mounting technology (surface mount versus through hole) and package form factor (24-SOIC versus 24-DIP), all functional electrical parameters remain identical. The substitute maintains the same series designation (74ABT), logic architecture, and performance specifications.

Parameter Comparison

Engineering Selection Recommendations

The SN74ABT861DW is the manufacturer-recommended substitute for the obsolete SN74ABT861NT. Both devices maintain identical electrical specifications and are ROHS3 compliant with unlimited moisture sensitivity rating. The primary distinction is packaging technology: the SN74ABT861DW employs surface-mount technology in a 24-SOIC package, whereas the original uses through-hole mounting in a 24-DIP package.

Selection between these devices depends on circuit board design requirements. The SN74ABT861DW offers active product status, ensuring continued availability and manufacturing support. Component selection must account for PCB layout compatibility with the respective package types.

Frequently Asked Questions (FAQ)

Q: Can the SN74ABT861DW directly replace the SN74ABT861NT in existing designs?

A: Electrical substitution is complete. Pin-to-pin compatibility exists at the functional level. Physical board integration requires accommodation of different package geometries: 24-DIP through-hole versus 24-SOIC surface-mount. PCB redesign or adapter solutions may be necessary depending on existing layout constraints.

Q: What is the significance of the product status difference?

A: The SN74ABT861NT is classified as obsolete, indicating discontinued manufacturing and limited availability. The SN74ABT861DW maintains active status, ensuring ongoing production, supply chain availability, and manufacturer support.

Q: Are the electrical performance characteristics identical?

A: Yes. Both devices operate at 4.5V to 5.5V supply voltage, deliver 32mA and 64mA output currents for high and low states respectively, and function across the -40°C to 85°C temperature range. Logic architecture, element count, bit width, and output configuration are identical.

Q: What packaging considerations apply to substitution?

A: The SN74ABT861NT uses a 24-pin DIP package (0.300" width) for through-hole mounting. The SN74ABT861DW uses a 24-pin SOIC package (0.295" width) for surface-mount assembly. Package selection affects PCB design, assembly process, and board real estate requirements.

Q: Do both devices meet the same compliance standards?

A: Yes. Both are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity). REACH status is unaffected for both devices.