74HC390N,652 Equivalent & Substitute Parts

Part Overview

The 74HC390N,652 is a decade counter logic IC manufactured by NXP USA Inc., featuring dual 4-bit negative edge-triggered counters in a 16-DIP through-hole package. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates across a 2V to 6V supply range with a maximum count rate of 71 MHz and supports asynchronous reset functionality.

Substiute Parts

74HC390N,652

NXP USA Inc.In Stock: 112674HC390N,652 Datasheet

Current PartRFQ

CD74HC390E

Texas InstrumentsIn Stock: 1718CD74HC390E Datasheet

DirectRFQ

CD74HC390M

Harris CorporationIn Stock: 3145CD74HC390M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC390N,652 is determined by the following critical parameters:

• Logic Type: Counter, Decade (2 Element, 4 Bit configuration)
• Trigger Type: Negative Edge
• Reset Function: Asynchronous
• Voltage Supply Range: 2 V ~ 6 V (minimum overlap required)
• Operating Temperature Range: Minimum -40°C support required
• Base Product Number: 74HC390 (same logic family)

The substitute parts CD74HC390E and CD74HC390M share the identical logic architecture, counter configuration, and trigger characteristics. Both maintain the 74HC390 base product designation and support the required voltage and temperature operating windows. Differences in count rate, package type, and product status are secondary considerations that do not affect functional substitution capability within the specified electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

CD74HC390E (Texas Instruments) is the primary substitute for the 74HC390N,652. This part maintains active product status, ensuring long-term availability and supply chain stability. It is packaged in 16-DIP through-hole configuration, providing direct mechanical compatibility with existing PCB layouts. The CD74HC390E carries ROHS3 compliance certification, meeting modern environmental and regulatory requirements. The extended operating temperature range (-55°C to 125°C) provides additional thermal margin beyond the original specification.

CD74HC390M (Harris Corporation) serves as an alternative substitute where surface-mount integration is required. This part is classified as obsolete and does not meet RoHS compliance standards. Selection of this part is appropriate only when surface-mount packaging is a design requirement and RoHS non-compliance is acceptable within the application context.

Frequently Asked Questions (FAQ)

Q: Can CD74HC390E directly replace 74HC390N,652 in existing designs?

A: Yes. Both parts share identical logic type, counter configuration, trigger characteristics, and voltage supply specifications. The 16-DIP through-hole package of CD74HC390E provides direct mechanical compatibility. The lower count rate of CD74HC390E (35 MHz versus 71 MHz) does not affect substitution eligibility, as both exceed typical application requirements for decade counter functionality.

Q: What is the difference between CD74HC390E and CD74HC390M?

A: The primary difference is packaging type. CD74HC390E uses 16-DIP through-hole mounting, while CD74HC390M uses 16-SOIC surface-mount packaging. CD74HC390E is active product status with ROHS3 compliance. CD74HC390M is obsolete and RoHS non-compliant. Both share identical electrical specifications and counter logic.

Q: Is the extended temperature range of substitute parts a concern?

A: No. The substitute parts support -55°C to 125°C operation, which encompasses the original -40°C to 125°C specification. Extended temperature range provides additional design margin and does not introduce compatibility issues.

Q: Can CD74HC390M be used if RoHS compliance is required?

A: No. CD74HC390M is RoHS non-compliant. For applications requiring RoHS certification, CD74HC390E is the appropriate selection.

Q: Are there package compatibility considerations when selecting substitutes?

A: Yes. CD74HC390E maintains the 16-DIP through-hole package of the original part and requires no PCB layout modifications. CD74HC390M uses 16-SOIC surface-mount packaging and requires different PCB footprint and assembly process. Package selection depends on manufacturing capability and design requirements.