SN74ABT620DBR Equivalent & Substitute Parts

Part Overview

The SN74ABT620DBR is a logic transceiver IC manufactured by Texas Instruments, designed as an inverting 1-element, 8-bit transceiver with 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-SSOP surface mount package. The SN74ABT620DBR is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity.

Substiute Parts

SN74ABT620DBR

Texas InstrumentsIn Stock: 996SN74ABT620DBR Datasheet

Current PartRFQ

SN74ABT640DBR

Texas InstrumentsIn Stock: 3265SN74ABT640DBR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74ABT620DBR are identified based on strict parametric equivalence across the following critical criteria:

• Logic type and functional configuration (Transceiver, Inverting)
• Element and bit-per-element count (1 element, 8 bits per element)
• Output type (3-State)
• Output current specifications (32mA high, 64mA low)
• Supply voltage range (4.5V ~ 5.5V)
• Operating temperature range (-40°C ~ 85°C)
• Package type and physical dimensions (20-SSOP)
• Series classification (74ABT)
• Compliance certifications (RoHS3, REACH Unaffected)

The SN74ABT640DBR meets all these parametric requirements and is classified as an active product, providing a direct functional and electrical equivalent for the obsolete SN74ABT620DBR.

Parameter Comparison

Engineering Selection Recommendations

The SN74ABT640DBR is the direct substitute for the SN74ABT620DBR. Both components share identical electrical specifications, package dimensions, and compliance certifications. The primary distinction is product status: the SN74ABT620DBR is obsolete, while the SN74ABT640DBR maintains active production status. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The SN74ABT640DBR is available in Tape & Reel packaging, supporting automated assembly processes. Selection of the SN74ABT640DBR ensures design continuity with equivalent performance characteristics and ongoing component availability.

Frequently Asked Questions (FAQ)

Q: Can the SN74ABT640DBR directly replace the SN74ABT620DBR in existing designs?

A: Yes. The SN74ABT640DBR is parametrically equivalent across all electrical and mechanical specifications, including supply voltage, output current, operating temperature range, and package dimensions. No circuit modifications are required.

Q: What is the significance of the product status difference between these parts?

A: The SN74ABT620DBR is classified as obsolete, indicating discontinued production. The SN74ABT640DBR maintains active production status, ensuring long-term availability and supply chain reliability for new designs and production runs.

Q: Are there packaging differences between these components?

A: Both components use the 20-SSOP package with identical physical dimensions (0.209", 5.30mm width). The SN74ABT640DBR is supplied in Tape & Reel format, which is standard for automated assembly. The SN74ABT620DBR was supplied in standard packaging. Both are surface mount components compatible with standard PCB assembly processes.

Q: Do these parts meet current compliance requirements?

A: Yes. Both the SN74ABT620DBR and SN74ABT640DBR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Are there any functional differences in logic operation between these parts?

A: No. Both components function identically as inverting transceivers with 1 element, 8 bits per element, and 3-state output configuration. Electrical performance, including output current specifications and voltage supply range, is identical.