CD74ACT646M96 Equivalent & Substitute Parts

Part Overview

The CD74ACT646M96 is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments, designed for 8-bit bidirectional data transfer applications. This device operates within the 74ACT logic family and features 3-state output capability, making it suitable for bus-oriented system architectures. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit functional equivalents from alternative manufacturers or product variants within the same logic family.

Substiute Parts

CD74ACT646M96

Texas InstrumentsIn Stock: 1001CD74ACT646M96 Datasheet

Current PartRFQ

CD74ACT652M96

Texas InstrumentsIn Stock: 1053CD74ACT652M96 Datasheet

Parametric EquivalentRFQ

MC74ACT646DWG

onsemiIn Stock: 972MC74ACT646DWG Datasheet

MFR RecommendedRFQ

MC74ACT646DWR2G

onsemiIn Stock: 972MC74ACT646DWR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74ACT646M96 is determined by the following critical parameters:

Primary Substitution Criteria:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 24mA, 24mA
• Voltage - Supply: 4.5V ~ 5.5V
• Package / Case: 24-SOIC (0.295", 7.50mm Width)

Parts meeting all primary criteria are classified as parametric equivalents. Parts with identical electrical specifications but differing product status or environmental ratings are classified as manufacturer-recommended alternatives. Operating temperature range and moisture sensitivity level variations do not preclude substitution when the application environment permits.

Parameter Comparison

Engineering Selection Recommendations

CD74ACT652M96 is a parametric equivalent offering identical electrical and thermal specifications to the CD74ACT646M96. Both parts are manufactured by Texas Instruments, maintain active product status, and carry MSL 1 rating. This substitute is suitable for direct replacement in all applications where the CD74ACT646M96 is specified.

MC74ACT646DWG and MC74ACT646DWR2G are manufacturer-recommended alternatives from onsemi. These parts maintain electrical compatibility across all critical parameters including supply voltage, output current, and package configuration. However, both parts carry obsolete product status and feature MSL 3 rating with restricted moisture exposure (168 hours maximum). These substitutes are appropriate only for applications where the reduced operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C) and enhanced moisture sensitivity do not conflict with system requirements.

Selection priority should favor active-status parts (CD74ACT646M96 or CD74ACT652M96) for new designs and long-term production applications. Obsolete alternatives may be considered only when supply of active parts is unavailable and application environmental conditions permit the reduced specifications.

Frequently Asked Questions (FAQ)

Q: Can CD74ACT652M96 replace CD74ACT646M96 in existing designs?

A: Yes. The CD74ACT652M96 maintains identical electrical specifications, operating temperature range, and moisture sensitivity rating. Direct substitution is permissible without circuit modification.

Q: What is the primary difference between the main part and onsemi alternatives?

A: The onsemi parts (MC74ACT646DWG and MC74ACT646DWR2G) are obsolete products with restricted operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C) and higher moisture sensitivity (MSL 3 versus MSL 1). Electrical performance remains equivalent.

Q: Are all substitute parts available in the same package?

A: Yes. All listed substitutes use the 24-SOIC (0.295", 7.50mm Width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts.

Q: Which substitute should be selected for new product designs?

A: CD74ACT652M96 is the preferred substitute for new designs, as it maintains active product status and identical environmental specifications to the primary part.

Q: Can MC74ACT646DWR2G be used in applications requiring -55°C operation?

A: No. The MC74ACT646DWR2G operating temperature range is limited to -40°C ~ 85°C (TA). Applications requiring -55°C minimum operation must use CD74ACT646M96 or CD74ACT652M96.

Q: What does MSL 3 (168 Hours) mean for the onsemi parts?

A: MSL 3 indicates the component can be exposed to moisture for a maximum of 168 hours before soldering. MSL 1 (unlimited) parts have no such restriction. This affects storage and handling procedures.