74HCT393D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT393D,652 is a binary counter logic IC manufactured by Nexperia USA Inc., featuring two independent 4-bit counters with negative edge triggering. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates within the 74HCT logic family standard, maintaining compatibility with systems requiring binary counting functionality in surface-mount configurations.

Substiute Parts

74HCT393D,652

Nexperia USA Inc.In Stock: 94874HCT393D,652 Datasheet

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CD74HCT393M

Harris CorporationIn Stock: 5917CD74HCT393M Datasheet

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CD74HCT393M96

Texas InstrumentsIn Stock: 2084CD74HCT393M96 Datasheet

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CD74HCT393MT

Texas InstrumentsIn Stock: 1759CD74HCT393MT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HCT393D,652 is determined by strict adherence to the following electrical and mechanical parameters:

Core Substitution Criteria:

• Logic Type: Binary Counter (2 Element, 4 Bit configuration)
• Trigger Type: Negative Edge
• Reset: Asynchronous
• Voltage Supply Range: 4.5 V ~ 5.5 V
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Base Product Number: 74HCT393

All identified substitute parts maintain these core parameters, ensuring functional and mechanical compatibility. Variations in count rate, operating temperature range, product status, and RoHS compliance are noted but do not preclude substitution when electrical performance requirements are met.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT393M96 (Texas Instruments) is the primary recommended substitute. This part maintains ROHS3 compliance, carries active product status, and is available in Tape & Reel packaging. The lower count rate of 27 MHz remains within acceptable operational parameters for applications not requiring the 107 MHz performance of the original part.

CD74HCT393MT (Texas Instruments) serves as a secondary alternative with identical electrical specifications to CD74HCT393M96. This part is discontinued at DiGi Electronics but remains functionally equivalent and ROHS3 compliant.

CD74HCT393M (Harris Corporation) is functionally compatible but carries RoHS non-compliance status and obsolete product classification. Selection of this substitute should be limited to applications where RoHS compliance is not a requirement.

All three substitutes maintain the critical electrical parameters: 4.5 V ~ 5.5 V supply voltage, negative edge triggering, asynchronous reset, and 14-SOIC package configuration.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT393M96 directly replace 74HCT393D,652 in existing designs?

A: Yes. Both parts share identical logic configuration (2 Element, 4 Bit binary counter), trigger type (negative edge), reset mechanism (asynchronous), supply voltage range (4.5 V ~ 5.5 V), and package format (14-SOIC). Pin-to-pin compatibility is maintained.

Q: What is the significance of the count rate difference between 74HCT393D,652 (107 MHz) and the substitute parts (27 MHz)?

A: The count rate specification defines the maximum frequency at which the counter can operate. Applications operating below 27 MHz will function identically with either part. Applications requiring operation above 27 MHz but below 107 MHz may experience performance limitations with substitute parts and should be evaluated against specific timing requirements.

Q: Why is CD74HCT393M listed as RoHS non-compliant?

A: RoHS compliance status reflects the manufacturing and material standards applied to the component. Non-compliance indicates the part may contain restricted substances. Selection should align with end-product regulatory requirements.

Q: Are there packaging differences between the substitute parts?

A: CD74HCT393M96 and CD74HCT393MT are supplied in Tape & Reel (TR) packaging, while CD74HCT393M is supplied in Tube packaging. The physical component package (14-SOIC) remains identical across all substitutes. Packaging selection depends on assembly process requirements and order quantities.

Q: What is Moisture Sensitivity Level (MSL) and why does it matter?

A: MSL indicates the component's sensitivity to moisture absorption during storage and handling. MSL 1 (Unlimited) represents the lowest sensitivity level, allowing indefinite storage without special moisture control measures. CD74HCT393M96 and CD74HCT393MT both carry MSL 1 rating, matching the original part specification.