74HCT390D,653 Equivalent & Substitute Parts

Part Overview

The 74HCT390D,653 is a decade counter logic IC manufactured by Nexperia USA Inc., featuring dual 4-bit negative edge-triggered counters in a 16-SOIC surface mount package. This component is classified as active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are necessary when the primary part becomes unavailable due to inventory constraints, supply chain disruptions, or when alternative manufacturers' versions meet identical electrical and mechanical specifications.

Substiute Parts

74HCT390D,653

Nexperia USA Inc.In Stock: 336474HCT390D,653 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 eligibility for the 74HCT390D,653 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Logic Type: Counter, Decade
• Number of Elements: 2
• Number of Bits per Element: 4
• Trigger Type: Negative Edge
• Reset: Asynchronous
• Voltage - Supply: 4.5 V ~ 5.5 V
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Base Product Number: 74HCT390

Allowable Variation Parameters:

• Count Rate: Substitute parts may operate at lower maximum frequencies (27 MHz vs. 55 MHz) while remaining functionally compatible
• Operating Temperature: Substitute parts may have extended lower temperature range (-55°C vs. -40°C minimum)
• Packaging Format: Substitutes may be supplied in Tube format instead of Tape & Reel
• Product Status: Active, Obsolete, or Last Time Buy status does not affect electrical compatibility
• RoHS Compliance: Both compliant and non-compliant versions are listed based on availability

All identified substitute parts maintain identical pinout, logic function, and electrical interface characteristics with the primary part.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT390M96 (Texas Instruments) is the primary recommended substitute. This part maintains active product status, ROHS3 compliance, and Tape & Reel packaging identical to the primary part. The 27 MHz count rate is functionally compatible with applications not requiring the full 55 MHz specification of the Nexperia device.

CD74HCT390MT (Texas Instruments) is a secondary substitute option. While functionally equivalent and ROHS3 compliant, this part carries Last Time Buy status, indicating limited future availability. Selection should account for long-term supply requirements.

CD74HCT390M (Harris Corporation) is not recommended for new designs. This part is obsolete and RoHS non-compliant, suitable only for legacy system maintenance or repair applications where compliance requirements do not apply.

All three substitute parts are electrically and mechanically compatible with the 74HCT390D,653 for applications operating within the specified voltage and temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT390M96 replace 74HCT390D,653 in my circuit? A: Yes. Both parts are decade counter ICs with identical logic function, pinout, and electrical interface. The 27 MHz count rate of the CD74HCT390M96 is compatible with applications not requiring the 55 MHz maximum frequency of the primary part.

Q: What is the difference between Tape & Reel and Tube packaging? A: Tape & Reel (TR) packaging is supplied on continuous carrier tape suitable for automated pick-and-place assembly. Tube packaging contains loose components in a plastic tube, typically used for manual assembly or lower-volume applications. Both formats contain identical components; packaging format affects handling and assembly processes only.

Q: Why does CD74HCT390MT show Last Time Buy status? A: Last Time Buy status indicates the manufacturer has announced end-of-life for this part. Existing inventory may be available, but future production is not planned. This part remains functionally equivalent but should not be selected for new designs requiring long-term component availability.

Q: Is RoHS compliance important for my application? A: RoHS3 compliance is mandatory for products sold in the European Union and many other markets. If your application requires RoHS certification, select CD74HCT390M96 or CD74HCT390MT. The CD74HCT390M (RoHS non-compliant) is suitable only for legacy systems or markets without RoHS requirements.

Q: Can I use these parts interchangeably on the same PCB? A: Yes. All substitute parts share identical 16-SOIC package dimensions and pinout. PCB footprints and solder reflow profiles are compatible across all listed parts.

Q: What is the significance of the -40°C vs. -55°C operating temperature range? A: The primary part (74HCT390D,653) operates from -40°C minimum; substitute parts operate from -55°C minimum. If your application requires operation below -40°C, substitute parts provide extended low-temperature capability. For applications within -40°C to 125°C range, both specifications are equivalent.