CD74HCT4040MT Equivalent & Substitute Parts

Part Overview

The CD74HCT4040MT is a 12-bit binary counter logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This device functions as a negative edge-triggered counter with asynchronous reset capability, operating at a maximum count rate of 25 MHz across a 4.5 V to 5.5 V supply voltage range.

The CD74HCT4040MT is classified as obsolete. Substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production builds and field replacements. Active alternatives within the 74HCT4040 family provide equivalent functionality with extended product lifecycle support.

Substiute Parts

CD74HCT4040MT

Texas InstrumentsIn Stock: 1030CD74HCT4040MT Datasheet

Current PartRFQ

CD74HCT4040M96

Texas InstrumentsIn Stock: 1789CD74HCT4040M96 Datasheet

Parametric EquivalentRFQ

74HCT374PW,118

Nexperia USA Inc.In Stock: 107174HCT374PW,118 Datasheet

MFR RecommendedRFQ

74HCT4040D,652

NXP SemiconductorsIn Stock: 1061274HCT4040D,652 Datasheet

MFR RecommendedRFQ

74HCT4040D,653

Nexperia USA Inc.In Stock: 324774HCT4040D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HCT4040MT is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Logic Type: Binary Counter
• Number of Bits per Element: 12
• Direction: Up
• Number of Elements: 1
• Reset Type: Asynchronous
• Trigger Type: Negative Edge

Electrical Parameters:

• Voltage - Supply: 4.5 V ~ 5.5 V
• Count Rate: 25 MHz or higher

Physical Parameters:

• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must match all functional and electrical parameters. Packaging variations (Tape & Reel, Cut Tape, or Bulk) do not affect functional equivalence. Parts with different logic functions, bit widths, or package types are not suitable substitutes.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CD74HCT4040M96

The CD74HCT4040M96 is the direct parametric equivalent to the CD74HCT4040MT. Both devices are manufactured by Texas Instruments and share identical functional specifications, electrical characteristics, and package geometry. The CD74HCT4040M96 maintains active product status, ensuring long-term availability and supply chain continuity. This part is the preferred substitute for direct replacement applications.

Secondary Substitutes: 74HCT4040D,653 and 74HCT4040D,652

The 74HCT4040D,653 (Nexperia USA Inc.) and 74HCT4040D,652 (NXP Semiconductors) are functionally equivalent alternatives from the 74HCT4040 family. Both maintain active product status and ROHS3 compliance. The 74HCT4040D,653 specifies a count rate of 79 MHz, which exceeds the minimum 25 MHz requirement and provides additional performance margin. Operating temperature range for the 74HCT4040D,653 is -40°C to 125°C, which covers the standard industrial range but does not extend to the -55°C lower limit of the original part. The 74HCT4040D,652 is available in bulk packaging, suitable for high-volume production environments.

Packaging Considerations

The CD74HCT4040MT is supplied in Tape & Reel (TR) packaging. Substitute parts are available in equivalent Tape & Reel, Cut Tape (CT), and Bulk packaging formats. Packaging selection does not affect functional compatibility and should be determined by procurement and assembly requirements.

Compliance Status

All substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT4040M96 be used as a direct replacement for the CD74HCT4040MT?

A: Yes. The CD74HCT4040M96 is a parametric equivalent with identical logic type, bit width, reset type, trigger type, supply voltage, and package geometry. The primary difference is product status: the CD74HCT4040M96 is active, while the CD74HCT4040MT is obsolete.

Q: What is the difference between the 74HCT4040D,653 and CD74HCT4040M96?

A: Both are 12-bit binary counters in 16-SOIC packages with identical functional specifications. The 74HCT4040D,653 is manufactured by Nexperia USA Inc. and specifies a count rate of 79 MHz compared to 25 MHz for the CD74HCT4040M96. The operating temperature range for the 74HCT4040D,653 is -40°C to 125°C, which does not extend to the -55°C lower limit of the original part. For applications requiring the full -55°C to 125°C temperature range, the CD74HCT4040M96 is the appropriate selection.

Q: Are there functional differences between packaging formats (Tape & Reel, Cut Tape, Bulk)?

A: No. Packaging format affects only procurement, handling, and assembly processes. Functional performance, electrical characteristics, and pin configuration remain identical across all packaging options for the same base part number.

Q: Does the higher count rate of the 74HCT4040D,653 (79 MHz) affect compatibility?

A: No. The 79 MHz count rate of the 74HCT4040D,653 exceeds the 25 MHz minimum specification and provides additional performance margin. This part is functionally compatible with designs specified for 25 MHz operation.

Q: What is the significance of the ROHS3 compliance marking?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements and contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers. All substitute parts maintain this compliance status.

Q: Can the 74HCT374PW,118 be used as a substitute for the CD74HCT4040MT?

A: No. The 74HCT374PW,118 is a D-type flip-flop with 8-bit width and positive edge triggering. It is a different logic function and cannot replace the 12-bit binary counter with negative edge triggering. This part is not a functional equivalent.