74HCT4040N,652 Binary Counter - Equivalent & Substitute Parts

Part Overview

The 74HCT4040N,652 is a 12-bit binary counter IC manufactured by NXP USA Inc., designed for digital logic applications requiring asynchronous reset and negative edge triggering. This component operates at a maximum count rate of 79 MHz with supply voltage range of 4.5 V to 5.5 V and temperature range of -40°C to 125°C. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and procurement planning.

Substiute Parts

74HCT4040N,652

NXP USA Inc.In Stock: 113074HCT4040N,652 Datasheet

Current PartRFQ

CD74HCT4040E

Harris CorporationIn Stock: 1363CD74HCT4040E Datasheet

UpgradeRFQ

74HCT4040D,652

NXP SemiconductorsIn Stock: 1061274HCT4040D,652 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HCT4040N,652 is determined by the following critical parameters:

• Logic Function: Binary counter with 12-bit capacity, 1 element, up-counting direction
• Electrical Interface: Asynchronous reset, negative edge trigger, 4.5 V to 5.5 V supply voltage
• Timing Performance: Count rate capability must meet or exceed application requirements
• Package Compatibility: 16-DIP through-hole form factor with 0.300" (7.62mm) pitch
• Temperature Range: Operating temperature specification must encompass application environment

Substitute parts must maintain identical logic function, pin configuration, and electrical interface characteristics. Variations in count rate, temperature range, and compliance status are permissible provided they do not degrade system performance or violate regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

74HCT4040D,652 (MFR Recommended): This NXP Semiconductors part carries active product status, indicating ongoing manufacturer support and availability. As the manufacturer-recommended alternative, it maintains the 74HCT4040 base product number and is available in bulk packaging with 10,526 units in stock. Selection of this part eliminates obsolescence risk and ensures long-term supply chain stability. Moisture sensitivity level remains at MSL 1 (Unlimited), matching the original specification.

CD74HCT4040E (Upgrade Alternative): This Harris Corporation part provides extended operating temperature range (-55°C to 125°C) compared to the original specification (-40°C to 125°C), suitable for applications requiring enhanced low-temperature performance. However, the count rate is limited to 25 MHz, which may restrict use in high-frequency applications. Additionally, this part is RoHS non-compliant, which may conflict with regulatory requirements in certain markets or applications. Product status is obsolete.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT4040E replace 74HCT4040N,652 in all applications?

A: CD74HCT4040E maintains identical logic function, pin configuration, and core electrical interface (4.5 V to 5.5 V supply, asynchronous reset, negative edge trigger). However, the count rate is reduced to 25 MHz compared to 79 MHz in the original part. Substitution is valid only for applications where the maximum required count rate does not exceed 25 MHz. RoHS non-compliance status must be evaluated against system regulatory requirements.

Q: What is the primary advantage of 74HCT4040D,652?

A: The 74HCT4040D,652 carries active product status from NXP Semiconductors, ensuring ongoing availability and manufacturer support. This eliminates obsolescence concerns associated with the original 74HCT4040N,652 part and provides superior long-term supply chain reliability.

Q: Are all substitute parts pin-compatible with the original 74HCT4040N,652?

A: Yes. All listed substitute parts maintain the 16-DIP (0.300", 7.62mm) package format and identical pin configuration, ensuring direct mechanical and electrical compatibility in through-hole applications.

Q: Does operating temperature range affect substitution decisions?

A: Operating temperature range affects substitution only if the application environment exceeds the specified limits. The CD74HCT4040E provides extended low-temperature operation (-55°C minimum) compared to the original specification (-40°C minimum). The 74HCT4040D,652 temperature specification is not provided in available documentation.

Q: What compliance considerations apply to substitute selection?

A: The original 74HCT4040N,652 is ROHS3 compliant. The CD74HCT4040E is RoHS non-compliant, which may restrict use in applications or markets with mandatory RoHS requirements. The 74HCT4040D,652 compliance status is not specified in available documentation and should be confirmed with the manufacturer for regulatory-sensitive applications.