SN74LS682DW Equivalent & Substitute Parts

Part Overview

The SN74LS682DW is an 8-bit magnitude comparator logic IC manufactured by Texas Instruments, housed in a 20-SOIC surface mount package. This component performs magnitude comparison operations with active low outputs for A=B and A>B functions. The SN74LS682DW is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring 8-bit magnitude comparison functionality.

Substiute Parts

SN74LS682DW

Texas InstrumentsIn Stock: 980SN74LS682DW Datasheet

Current PartRFQ

SN74LS682DWR

Texas InstrumentsIn Stock: 1015SN74LS682DWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LS682DW are determined by strict equivalence across the following critical parameters:

• Functional Type: 8-bit magnitude comparator with identical output logic (Active Low, A=B and A>B functions)
• Electrical Specifications: Matching supply voltage range (4.85V ~ 5.25V), output current ratings (400µA / 24mA), and propagation delay (30ns @ 5V, 45pF)
• Package Compatibility: Identical 20-SOIC surface mount package (0.295", 7.50mm Width)
• Operating Temperature Range: 0°C ~ 70°C
• Compliance Standards: ROHS3 Compliant, MSL Level 1

The SN74LS682DWR qualifies as a direct substitute based on identical electrical and mechanical parameters. The primary distinction is packaging format: the original part uses Tube packaging, while the substitute uses Tape & Reel (TR) format. Both are manufactured by Texas Instruments within the 74LS series.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS682DWR is the direct substitute for the SN74LS682DW. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications. The SN74LS682DWR is currently in Active product status, ensuring continued availability and supply chain stability compared to the Last Time Buy status of the original part.

Selection between these parts depends on procurement and assembly requirements. The Tube packaging format of the SN74LS682DW suits lower-volume or manual assembly operations. The Tape & Reel (TR) format of the SN74LS682DWR is optimized for automated pick-and-place assembly processes and higher-volume production runs.

Both parts maintain identical ROHS3 compliance and MSL Level 1 ratings, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS682DWR directly replace the SN74LS682DW in existing designs?

A: Yes. The SN74LS682DWR is a direct electrical and mechanical equivalent. All functional parameters, electrical specifications, and package dimensions are identical. The only difference is the packaging format (Tape & Reel versus Tube).

Q: What is the significance of the Last Time Buy status for the SN74LS682DW?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. Existing inventory may be available, but future supply cannot be guaranteed. The SN74LS682DWR, in Active status, provides long-term supply continuity.

Q: Are there any compatibility concerns when switching from Tube to Tape & Reel packaging?

A: No compatibility concerns exist at the component level. Both packaging formats contain identical die and lead configurations. The difference is in handling and assembly: Tube packaging is manual-friendly, while Tape & Reel is optimized for automated assembly equipment.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74LS682DW and SN74LS682DWR are ROHS3 Compliant with MSL Level 1 ratings. They meet identical environmental and regulatory requirements.

Q: What are the key parameters that define substitution eligibility for this 8-bit magnitude comparator?

A: Substitution eligibility is determined by: 8-bit comparator function, Active Low output logic (A=B and A>B), 4.85V ~ 5.25V supply voltage, 400µA / 24mA output current ratings, 30ns propagation delay at 5V with 45pF load, 0°C ~ 70°C operating temperature, and 20-SOIC surface mount package.