74HC390D,652 Equivalent & Substitute Parts

Part Overview

The 74HC390D,652 is a decade counter logic integrated circuit 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 obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and production continuity. The part operates across a 2V to 6V supply range with a maximum count rate of 71 MHz and maintains asynchronous reset capability across the specified operating temperature range of -40°C to 125°C.

Key Parameters

Parameter	Value
Logic Type	Counter, Decade
Number of Elements	2
Number of Bits per Element	4
Trigger Type	Negative Edge
Reset Type	Asynchronous
Voltage Supply Range	2V to 6V
Count Rate	71 MHz
Package Type	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Operating Temperature	-40°C to 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC390D,652 is determined by the following critical parameters: logic type (decade counter), dual 4-bit element configuration, negative edge trigger mechanism, asynchronous reset functionality, 16-SOIC package geometry, and supply voltage compatibility (2V to 6V). All identified substitute parts maintain these core electrical and mechanical specifications. Count rate variations and operating temperature ranges are secondary considerations that do not preclude substitution when the primary functional parameters align. Product status and compliance certifications are documented to support procurement decisions but do not alter functional equivalence.

Parameter Comparison

Parameter	74HC390D,652 (Nexperia)	MC74HC390ADR2G (onsemi)	CD74HC390M (Harris)	CD74HC390M96 (TI)	MC74HC390ADG (onsemi)
Logic Type	Counter, Decade	Counter, Decade	Counter, Decade	Counter, Decade	Counter, Decade
Number of Elements	2	2	2	2	2
Bits per Element	4	4	4	4	4
Trigger Type	Negative Edge	Negative Edge	Negative Edge	Negative Edge	Negative Edge
Reset	Asynchronous	Asynchronous	Asynchronous	Asynchronous	Asynchronous
Voltage Supply	2V to 6V	2V to 6V	2V to 6V	2V to 6V	2V to 6V
Count Rate	71 MHz	50 MHz	35 MHz	35 MHz	50 MHz
Operating Temperature	-40°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Package	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Product Status	Obsolete	Active	Obsolete	Active	Active
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	Non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring direct replacement of the 74HC390D,652, the MC74HC390ADR2G (onsemi, Tape & Reel packaging) and MC74HC390ADG (onsemi, Tube packaging) are preferred substitutes. Both parts are currently active in production, ROHS3 compliant, and maintain identical electrical specifications within the 2V to 6V supply range. The MC74HC390ADR2G offers extended operating temperature range (-55°C to 125°C) and is available in tape and reel format suitable for automated assembly.

The CD74HC390M96 (Texas Instruments) represents an alternative active substitute with ROHS3 compliance and extended temperature range. This part is available in tape and reel packaging and supports equivalent functional operation.

The CD74HC390M (Harris Corporation) maintains functional equivalence but carries obsolete product status and lacks ROHS3 compliance, making it unsuitable for new designs subject to environmental regulations.

Selection between active substitutes should prioritize packaging format (tape and reel for automated assembly, tube for manual placement) and supplier availability. Count rate differences (50 MHz for onsemi variants versus 35 MHz for Harris and TI variants) do not affect substitution eligibility when application timing requirements remain below the specified maximum rates.

Frequently Asked Questions (FAQ)

Q: Can MC74HC390ADR2G replace 74HC390D,652 in existing designs? A: Yes. Both parts share identical logic type, element configuration, trigger mechanism, reset functionality, supply voltage range, and 16-SOIC package geometry. The MC74HC390ADR2G is active in production and ROHS3 compliant.

Q: What is the difference between MC74HC390ADR2G and MC74HC390ADG? A: Both are onsemi manufactured 74HC390 decade counters with identical electrical specifications. The primary difference is packaging format: MC74HC390ADR2G is supplied in tape and reel (TR) format for automated assembly, while MC74HC390ADG is supplied in tube format for manual handling.

Q: Why does the 74HC390D,652 have a higher count rate (71 MHz) than some substitutes? A: Count rate variations reflect manufacturing process differences between suppliers. Substitution remains valid when application timing requirements do not exceed the substitute part's specified maximum count rate. Verify application clock frequencies against the selected substitute's datasheet.

Q: Is CD74HC390M suitable for new production? A: No. This part is obsolete and non-compliant with ROHS3 environmental standards. Use active alternatives: MC74HC390ADR2G, MC74HC390ADG, or CD74HC390M96.

Q: Do all substitutes support the same operating temperature range? A: No. The 74HC390D,652 operates from -40°C to 125°C. All identified substitutes extend the lower temperature limit to -55°C, providing broader environmental coverage. Verify application temperature requirements against the selected substitute's specifications.

Q: Are there packaging considerations when selecting a substitute? A: Yes. Tape and reel packaging (MC74HC390ADR2G, CD74HC390M96) is optimized for automated pick-and-place assembly. Tube packaging (MC74HC390ADG) is suitable for manual assembly or lower-volume production. Select based on manufacturing process requirements.

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