SN74ALS651ADW Equivalent & Substitute Parts

Part Overview

The SN74ALS651ADW is a logic transceiver IC featuring inverting functionality with 1 element, 8 bits per element, and 3-state output capability. Manufactured by Texas Instruments in a 24-SOIC surface mount package, this component operates within the 4.5V to 5.5V supply voltage range and is rated for 0°C to 70°C operating temperature.

The SN74ALS651ADW is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this legacy device is specified.

Substiute Parts

SN74ALS651ADW

Texas InstrumentsIn Stock: 1049SN74ALS651ADW Datasheet

Current PartRFQ

SN74ALS648ADW

Texas InstrumentsIn Stock: 1025SN74ALS648ADW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74ALS651ADW are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Logic Type: Transceiver, Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 15mA, 24mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)
• Package / Case: 24-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

The SN74ALS648ADW meets all critical electrical and mechanical parameters, making it a parametric equivalent. Both parts share identical functional specifications, pin configurations, and performance characteristics within the specified operating ranges.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS648ADW is a direct parametric equivalent to the SN74ALS651ADW. Both components are ROHS3 compliant and carry MSL Level 1 rating, indicating identical environmental and regulatory compliance profiles.

The primary distinction is product status: the SN74ALS651ADW is obsolete, while the SN74ALS648ADW maintains active production status. For new designs, repairs, and ongoing production requirements, the SN74ALS648ADW is the appropriate selection due to its active availability and identical electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS648ADW directly replace the SN74ALS651ADW in existing designs?

A: Yes. Both parts are parametric equivalents with identical logic type, element configuration, bit width, output type, current ratings, supply voltage range, operating temperature, and 24-SOIC package specifications. No circuit modifications are required.

Q: What is the primary reason to substitute the SN74ALS651ADW?

A: The SN74ALS651ADW is classified as obsolete. The SN74ALS648ADW provides the same functional and electrical performance with active production status and assured supply availability.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts carry identical ROHS3 compliance and MSL Level 1 ratings, ensuring equivalent environmental and regulatory standing.

Q: Is the 24-SOIC package identical for both parts?

A: Yes. Both components use the 24-SOIC (0.295", 7.50mm Width) surface mount package with identical pin configuration and mechanical dimensions.

Q: What are the critical electrical parameters that define substitution eligibility?

A: Substitution is based on matching logic type (Transceiver, Inverting), element count (1), bit width (8), output type (3-State), output current ratings (15mA, 24mA), supply voltage (4.5V ~ 5.5V), and operating temperature range (0°C ~ 70°C).