74HCT390D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT390D,652 is a decade counter logic IC manufactured by Nexperia USA Inc., featuring two 4-bit counter elements with negative edge triggering. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The 74HCT390 series provides asynchronous reset functionality with a maximum count rate of 55 MHz and operates across the industrial temperature range of -40°C to 125°C.

Substiute Parts

74HCT390D,652

Nexperia USA Inc.In Stock: 78974HCT390D,652 Datasheet

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CD74HCT390M

Harris CorporationIn Stock: 9198CD74HCT390M Datasheet

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CD74HCT390M96

Texas InstrumentsIn Stock: 1406CD74HCT390M96 Datasheet

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CD74HCT390MT

Texas InstrumentsIn Stock: 1508CD74HCT390MT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HCT390D,652 is determined by strict equivalence across the following critical parameters:

• Logic Type: Counter, Decade (2 Element, 4 Bit configuration)
• Trigger Type: Negative Edge
• Reset Function: Asynchronous
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount

All identified substitute parts maintain these core functional and mechanical specifications. Variations in count rate (27 MHz vs. 55 MHz) and operating temperature ranges represent acceptable deviations within the 74HCT390 series, as the substitute parts operate within the specified supply voltage and maintain identical logic functionality.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring ROHS3 compliance and active product status, CD74HCT390M96 (Texas Instruments) is the primary selection. This part maintains full functional equivalence to the 74HCT390D,652 while offering active product status and current compliance certifications.

CD74HCT390MT (Texas Instruments) provides an alternative with identical electrical and mechanical specifications, though classified as Last Time Buy status. This part is suitable for applications where long-term availability is not a critical constraint.

CD74HCT390M (Harris Corporation) is functionally equivalent but carries RoHS non-compliant status and obsolete product classification. Selection of this part requires verification that RoHS compliance is not mandated for the application.

All substitute parts are pin-compatible and functionally interchangeable within the specified electrical operating parameters.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT390M96 directly replace 74HCT390D,652 in existing designs?

A: Yes. Both parts share identical logic type, element configuration, trigger type, reset function, package, and supply voltage specifications. Pin compatibility is maintained across all substitute parts listed.

Q: What is the significance of the count rate difference (55 MHz vs. 27 MHz)?

A: The 74HCT390D,652 specifies a maximum count rate of 55 MHz, while substitute parts specify 27 MHz. Applications operating below 27 MHz will function identically with either part. Applications requiring operation above 27 MHz must retain the original 74HCT390D,652 or verify that the substitute part's 27 MHz specification meets system timing requirements.

Q: Are there RoHS compliance differences between substitute parts?

A: Yes. CD74HCT390M96 and CD74HCT390MT are ROHS3 compliant. CD74HCT390M is RoHS non-compliant. Selection depends on application regulatory requirements.

Q: Does operating temperature range affect substitution?

A: The 74HCT390D,652 operates from -40°C to 125°C. Substitute parts operate from -55°C to 125°C, providing an extended lower temperature range. This represents a compatible expansion of the operating envelope.

Q: What packaging formats are available for substitute parts?

A: CD74HCT390M is supplied in Tube packaging. CD74HCT390M96 and CD74HCT390MT are supplied in Tape & Reel (TR) format. All parts use identical 16-SOIC surface mount package geometry.