SN74HC4040DT Equivalent & Substitute Parts

Part Overview

The SN74HC4040DT is a 12-bit binary counter logic IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements. The SN74HC4040DT operates as a negative edge-triggered counter with asynchronous reset and timing characteristics, suitable for digital counting and frequency division applications across industrial and commercial temperature ranges.

Substiute Parts

SN74HC4040DT

Texas InstrumentsIn Stock: 1323SN74HC4040DT Datasheet

Current PartRFQ

SN74HC4040DBR

Texas InstrumentsIn Stock: 2926SN74HC4040DBR Datasheet

Parametric EquivalentRFQ

SN74HC4040DR

Texas InstrumentsIn Stock: 2194SN74HC4040DR Datasheet

Parametric EquivalentRFQ

SN74HC4040NSR

Texas InstrumentsIn Stock: 2256SN74HC4040NSR Datasheet

Parametric EquivalentRFQ

MC74HC4040ADR2G

onsemiIn Stock: 7162MC74HC4040ADR2G Datasheet

DirectRFQ

74HC4040D,653

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

UpgradeRFQ

74HC4040D-Q100J

Nexperia USA Inc.In Stock: 313374HC4040D-Q100J Datasheet

MFR RecommendedRFQ

MC74HC4040ADG

onsemiIn Stock: 2841MC74HC4040ADG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74HC4040DT is determined by strict equivalence across the following critical parameters: 12-bit binary counter function, negative edge trigger, asynchronous reset, 2 V to 6 V supply voltage range, surface mount 16-SOIC package, and ROHS3 compliance. Substitute parts are grouped into three categories based on product status and availability:

Parametric Equivalents maintain identical electrical specifications and packaging, differing only in product status or packaging format (Tape & Reel versus Cut Tape). These parts are direct functional replacements with no design changes required.

Direct Manufacturer Alternatives are sourced from different manufacturers but meet the same functional and electrical requirements. These parts may have enhanced specifications (higher count rate or extended temperature range) while maintaining backward compatibility.

Upgrade and Recommended Parts offer improved performance characteristics such as higher count rates (50 MHz to 98 MHz) or extended operating temperature ranges (-55°C to 125°C), while maintaining full functional compatibility and the same package footprint.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the discontinued SN74HC4040DT with minimal design impact, select from the active Texas Instruments parametric equivalents: SN74HC4040DBR, SN74HC4040DR, or SN74HC4040NSR. These parts maintain identical electrical performance, supply voltage range, operating temperature specifications, and ROHS3 compliance. The primary difference is packaging format; Tape & Reel variants (DBR, NSR) are suitable for automated assembly, while Cut Tape & Digi-Reel (DR) accommodates lower-volume or mixed-component orders.

For applications requiring enhanced performance within the same functional specification, the Nexperia parts 74HC4040D,653 and 74HC4040D-Q100J offer 98 MHz count rate capability and extended operating temperature range (-40°C to 125°C), providing design margin for future product iterations. The 74HC4040D-Q100J carries AEC-Q100 automotive qualification, suitable for automotive-grade applications.

The onsemi MC74HC4040ADR2G provides an alternative with 50 MHz count rate and -55°C to 125°C operating range, with higher current inventory availability (7095 pcs). The obsolete MC74HC4040ADG should not be selected for new designs due to discontinued status.

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and identical functional logic (12-bit binary counter, negative edge trigger, asynchronous reset, 2 V to 6 V supply).

Frequently Asked Questions (FAQ)

Q: Can SN74HC4040DBR directly replace SN74HC4040DT without PCB modifications?

A: Yes. SN74HC4040DBR is a parametric equivalent with identical electrical specifications, pin configuration, and 16-SOIC package footprint. No design changes are required. The only difference is product status (Active versus Discontinued) and packaging format (Tape & Reel).

Q: What is the difference between SN74HC4040DR and SN74HC4040DBR?

A: Both are Texas Instruments parametric equivalents with identical electrical performance. SN74HC4040DR is supplied in Cut Tape & Digi-Reel format, while SN74HC4040DBR is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Can I use 74HC4040D,653 or 74HC4040D-Q100J as a drop-in replacement?

A: Yes, with design benefits. Both Nexperia parts are functionally compatible and pin-compatible with the SN74HC4040DT. They offer higher count rate (98 MHz versus 33 MHz) and extended operating temperature range (-40°C to 125°C versus -40°C to 85°C). No PCB modifications are required, and they provide performance margin for demanding applications.

Q: Why do some substitute parts have different package dimensions (5.30mm versus 3.90mm width)?

A: The 16-SOIC package has two standard body widths. The original SN74HC4040DT uses 5.30mm width, while onsemi and Nexperia parts use 3.90mm width. Both are 16-SOIC packages with identical pin pitch and footprint compatibility on standard PCBs. Verify PCB footprint library specifications if width-critical spacing exists.

Q: Is MC74HC4040ADG suitable for new designs?

A: No. MC74HC4040ADG is marked as Obsolete and should not be selected for new production designs. Use active alternatives: MC74HC4040ADR2G (onsemi, active status) or Texas Instruments parametric equivalents.

Q: What is the significance of the AEC-Q100 qualification on 74HC4040D-Q100J?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This part is suitable for automotive applications requiring qualified components. Non-automotive applications do not require this qualification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original SN74HC4040DT specifications.