CD74HC4040NSR Equivalent & Substitute Parts

Part Overview

The CD74HC4040NSR is a 12-bit binary counter logic IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This device functions as a negative edge-triggered counter with asynchronous reset capability, operating across a 2V to 6V supply voltage range. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. Substitute parts must maintain identical logic functionality, pin configuration, and electrical performance characteristics to ensure direct replacement capability.

Substiute Parts

CD74HC4040NSR

Texas InstrumentsIn Stock: 931CD74HC4040NSR Datasheet

Current PartRFQ

74HC4040D,653

Nexperia USA Inc.In Stock: 520374HC4040D,653 Datasheet

MFR RecommendedRFQ

MC74HC4040ADR2G

onsemiIn Stock: 7162MC74HC4040ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC4040NSR is determined by strict adherence to the following core parameters:

• Logic type must be binary counter with identical 12-bit configuration
• Trigger mechanism must be negative edge-triggered
• Reset function must be asynchronous
• Supply voltage range must encompass or match 2V to 6V
• Operating temperature range must support the required application window
• Package must be 16-SOIC surface mount configuration
• Pin count and pinout must be identical (16 pins)
• Base product number must be 74HC4040 series

The identified substitute parts (74HC4040D,653 and MC74HC4040ADR2G) meet all mandatory substitution criteria. Both devices maintain the same logic architecture, pin configuration, and functional behavior as the CD74HC4040NSR while offering improved availability through active product status.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are suitable for direct replacement of the CD74HC4040NSR based on functional equivalence and compliance status.

The 74HC4040D,653 (Nexperia) offers the highest count rate specification at 98 MHz and is available in active production status with substantial inventory (5100 units). This part operates within the full 2V to 6V supply range and maintains ROHS3 compliance. The package footprint is the modern 16-SOIC (0.154", 3.90mm) configuration. The operating temperature range is -40°C to 125°C, which covers standard industrial applications but does not extend to the lower -55°C extreme of the original part.

The MC74HC4040ADR2G (onsemi) provides a count rate of 50 MHz and maintains the full operating temperature range of -55°C to 125°C, matching the original CD74HC4040NSR specification. This part is in active production with 7095 units available and carries ROHS3 compliance. The package is also the modern 16-SOIC (0.154", 3.90mm) configuration.

Selection between these two substitutes depends on specific application requirements: choose the Nexperia part for applications requiring maximum speed performance, or select the onsemi part for designs requiring the extended lower temperature operating range.

Frequently Asked Questions (FAQ)

Q: Can the 74HC4040D,653 be used in applications requiring -55°C operation?

A: No. The 74HC4040D,653 operates from -40°C to 125°C. For applications requiring -55°C minimum temperature operation, the MC74HC4040ADR2G is the appropriate substitute.

Q: Are there pin-to-pin compatibility differences between the CD74HC4040NSR and substitute parts?

A: No. All three parts maintain identical 16-pin SOIC pinout and logic functionality. Direct PCB replacement is possible without schematic modification.

Q: What is the significance of the different package widths (0.209" vs 0.154")?

A: The CD74HC4040NSR uses a wider 16-SOIC package (0.209", 5.30mm), while both substitute parts use the modern narrow 16-SOIC package (0.154", 3.90mm). Both are standard 16-SOIC configurations and will fit standard 16-SOIC PCB footprints. Verify PCB layout compatibility with your specific footprint design.

Q: Do all parts meet RoHS and REACH compliance requirements?

A: Yes. The CD74HC4040NSR and both substitute parts are ROHS3 compliant and REACH unaffected, suitable for applications with environmental compliance requirements.

Q: Which substitute part should be selected for new designs?

A: Both substitute parts are in active production status. The MC74HC4040ADR2G is recommended for designs requiring the full -55°C to 125°C temperature range. The 74HC4040D,653 is suitable for standard industrial temperature range applications and offers superior speed performance at 98 MHz.