CD74HCT73M Equivalent & Substitute Parts

Part Overview

The CD74HCT73M is a dual JK-type flip-flop logic integrated circuit manufactured by Texas Instruments in a 14-SOIC surface mount package. This component functions as a reset-capable, negative edge-triggered flip-flop with complementary outputs, operating at clock frequencies up to 60 MHz. The CD74HCT73M carries a Last Time Buy product status, indicating discontinued production. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

CD74HCT73M

Texas InstrumentsIn Stock: 2147CD74HCT73M Datasheet

Current PartRFQ

CD74HCT73M96

Texas InstrumentsIn Stock: 6513CD74HCT73M96 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HCT73M is determined by strict equivalence across the following critical parameters:

Functional Parameters: Type (JK-type flip-flop), number of elements (2), bits per element (1), output configuration (complementary), trigger mechanism (negative edge), and reset function must remain identical.

Electrical Parameters: Clock frequency (60 MHz), propagation delay (38ns @ 4.5V, 50pF), supply voltage range (4.5V ~ 5.5V), output current capability (4mA high/low), quiescent current (4 µA), and input capacitance (10 pF) must be maintained or exceeded.

Physical Parameters: Package type (14-SOIC with 0.154" width, 3.90mm) and surface mount mounting type must be identical to ensure PCB compatibility without redesign.

Compliance Parameters: RoHS3 compliance and MSL rating (1) must be preserved for manufacturing and environmental requirements.

The CD74HCT73M96 qualifies as a direct substitute based on identical functional, electrical, and physical specifications. The primary distinction is packaging format (Tube versus Tape & Reel) and product status (Last Time Buy versus Active).

Parameter Comparison

Engineering Selection Recommendations

The CD74HCT73M96 is a direct functional and electrical equivalent to the CD74HCT73M. Selection between these parts should be based on the following criteria:

Product Status Consideration: The CD74HCT73M carries Last Time Buy status, indicating end-of-life production. The CD74HCT73M96 maintains Active status with higher inventory availability (6484 units versus 2126 units), making it the preferred choice for new designs and ongoing production requirements.

Packaging Format: The CD74HCT73M is supplied in Tube packaging, while the CD74HCT73M96 is supplied in Tape & Reel format. Tape & Reel packaging is standard for automated assembly processes and offers cost advantages in high-volume manufacturing. Tube packaging may be preferred for manual assembly or low-volume applications.

Compliance Alignment: Both parts meet RoHS3 compliance requirements. The CD74HCT73M96 carries Not Applicable RoHS status notation, which does not indicate non-compliance but rather a different classification methodology. Both parts maintain identical MSL ratings and environmental specifications.

Substitution Validity: All electrical, functional, and physical parameters are identical. Direct substitution is valid without circuit redesign or PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT73M96 be used as a direct replacement for the CD74HCT73M in existing designs?

A: Yes. The CD74HCT73M96 is electrically and functionally identical to the CD74HCT73M. All critical parameters including clock frequency, propagation delay, supply voltage, output current, and package dimensions are equivalent. Direct substitution is valid without circuit modification.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging contains components in a plastic tube suitable for manual handling and small-quantity applications. Tape & Reel packaging places components on a continuous carrier tape wound on a reel, optimized for automated pick-and-place assembly equipment. Both formats contain identical components; packaging selection depends on assembly methodology and volume requirements.

Q: Are there any compliance or certification differences between these parts?

A: Both parts maintain RoHS3 compliance and identical Moisture Sensitivity Level (MSL 1) ratings. The RoHS status notation differs due to classification methodology, but both parts meet the same environmental and regulatory requirements.

Q: Why is the CD74HCT73M marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. The CD74HCT73M96 remains in active production and is the recommended part number for new orders and future designs.

Q: Can I mix CD74HCT73M and CD74HCT73M96 components in the same production batch?

A: Yes. Both parts are functionally and electrically identical and will perform identically in the circuit. However, using a single part number (CD74HCT73M96) is recommended for supply chain consistency and inventory management.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by equivalence in: flip-flop type (JK-type), element count (2), bit configuration (1 bit per element), output type (complementary), trigger mechanism (negative edge), clock frequency (60 MHz), propagation delay (38ns), supply voltage range (4.5V ~ 5.5V), output current (4mA), and package type (14-SOIC surface mount). Any deviation in these parameters disqualifies a part as a direct substitute.