CD74HCT259M Equivalent & Substitute Parts

Part Overview

The CD74HCT259M is an 8-bit addressable latch manufactured by Texas Instruments, classified as a D-Type, Addressable logic IC with a 1:8 circuit configuration. This part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement. The CD74HCT259M operates within the 74HCT logic family standard, providing standard output type functionality suitable for digital logic applications requiring addressable latch functionality.

Substiute Parts

CD74HCT259M

Texas InstrumentsIn Stock: 1319CD74HCT259M Datasheet

Current PartRFQ

CD74HCT259M96

Texas InstrumentsIn Stock: 1603CD74HCT259M96 Datasheet

DirectRFQ

74HCT157D,653

Nexperia USA Inc.In Stock: 128774HCT157D,653 Datasheet

MFR RecommendedRFQ

74HCT259D,652

NXP SemiconductorsIn Stock: 1809574HCT259D,652 Datasheet

MFR RecommendedRFQ

74HCT259D,653

Nexperia USA Inc.In Stock: 2811174HCT259D,653 Datasheet

MFR RecommendedRFQ

74HCT259D-Q100,118

Nexperia USA Inc.In Stock: 115474HCT259D-Q100,118 Datasheet

MFR RecommendedRFQ

MC74HCT259ADR2G

onsemiIn Stock: 1587MC74HCT259ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HCT259M is determined by the following critical parameters:

Primary Substitution Criteria:

• Logic Type: D-Type, Addressable
• Circuit Configuration: 1:8
• Package Type: 16-SOIC (0.154", 3.90mm Width)
• Voltage Supply Range: 4.5V ~ 5.5V
• Output Type: Standard
• Output Current Capability: 4mA minimum (High/Low)
• Mounting Type: Surface Mount

Acceptable Variations:

• Propagation Delay: Up to 20ns (original: 16ns)
• Operating Temperature Range: Minimum -40°C acceptable (original: -55°C)
• Manufacturer: Texas Instruments, Nexperia USA Inc., NXP Semiconductors, onsemi
• Product Status: Active or Discontinued (functional equivalence maintained)
• Packaging Format: Tape & Reel (TR), Cut Tape (CT), or Bulk

Substitute parts meeting all primary criteria and acceptable variations maintain full functional and pin-level compatibility with the CD74HCT259M.

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Status):

CD74HCT259M96 is the direct equivalent from Texas Instruments with identical electrical specifications and active product status. This part maintains the original 16ns propagation delay and -55°C to 125°C operating range, differing only in packaging format (Tape & Reel versus standard packaging).

74HCT259D,653 from Nexperia USA Inc. is functionally equivalent with active status. The propagation delay increases to 20ns, and the operating temperature range narrows to -40°C to 125°C. This part is suitable for applications where the extended low-temperature performance of the original is not required.

74HCT259D-Q100,118 from Nexperia USA Inc. provides automotive-grade qualification (AEC-Q100) with identical electrical specifications to 74HCT259D,653. This variant is appropriate for automotive and high-reliability applications.

Secondary Substitute (Obsolete Status):

MC74HCT259ADR2G from onsemi maintains functional compatibility but is classified as obsolete. The propagation delay extends to 42ns, representing a significant performance reduction. Output current capability increases to 5.2mA. This part should be considered only when other active alternatives are unavailable.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) rating, ensuring compatibility with modern manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT259M96 be used as a direct replacement for CD74HCT259M?

A: Yes. CD74HCT259M96 is functionally equivalent with identical electrical specifications. The difference is packaging format: CD74HCT259M96 is supplied in Tape & Reel format while CD74HCT259M uses standard packaging. Both are 16-SOIC surface mount packages with identical pin configurations.

Q: What is the difference between 74HCT259D,653 and 74HCT259D-Q100,118?

A: Both parts are from Nexperia USA Inc. with identical electrical specifications. The 74HCT259D-Q100,118 carries automotive-grade qualification (AEC-Q100) certification, making it suitable for automotive applications. Select 74HCT259D-Q100,118 for automotive designs; use 74HCT259D,653 for general industrial applications.

Q: Why does MC74HCT259ADR2G have a 42ns propagation delay compared to 16ns in the original?

A: MC74HCT259ADR2G is manufactured by onsemi and exhibits different electrical characteristics despite maintaining the same logic function and package type. The extended propagation delay may impact timing-critical applications. This part is classified as obsolete and should be avoided unless no other alternatives are available.

Q: Are all substitute parts compatible with the original -55°C to 125°C operating temperature range?

A: No. CD74HCT259M96 and MC74HCT259ADR2G maintain the -55°C to 125°C range. However, 74HCT259D,653 and 74HCT259D-Q100,118 operate from -40°C to 125°C. Verify your application's minimum operating temperature requirement before selecting a substitute.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes, all substitute parts use the 16-SOIC package with identical pin configurations. No PCB layout modifications are required. Verify that your application can tolerate the propagation delay variations listed in the parameter comparison table.

Q: What is the inventory status for these substitutes?

A: CD74HCT259M96 has 1550 pieces in stock. 74HCT259D,653 has 28033 pieces in stock. 74HCT259D-Q100,118 has 1133 pieces in stock. MC74HCT259ADR2G has 1522 pieces in stock. Availability may vary; consult current inventory for procurement planning.