74HCT259N,652 Equivalent & Substitute Parts

Part Overview

The 74HCT259N,652 is an 8-bit addressable latch IC manufactured by NXP USA Inc., designed for digital logic applications requiring addressable storage and control. This component features a D-Type, addressable configuration with 1:8 circuit topology and standard output characteristics. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance, redesign, and procurement planning. Substitute parts must maintain functional equivalence through matching electrical specifications, package compatibility, and logic family standards.

Substiute Parts

74HCT259N,652

NXP USA Inc.In Stock: 111974HCT259N,652 Datasheet

Current PartRFQ

CD74HCT259E

Texas InstrumentsIn Stock: 4609CD74HCT259E Datasheet

DirectRFQ

74HCT259D,652

NXP SemiconductorsIn Stock: 1809574HCT259D,652 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HCT259N,652 is determined by strict adherence to the following parameters:

Critical Matching Parameters:

• Logic family and type: D-Type, Addressable configuration
• Circuit topology: 1:8 addressing scheme
• Supply voltage range: 4.5V ~ 5.5V compatibility
• Output characteristics: Standard output type with 4mA drive capability
• Package form factor: 16-DIP (0.300", 7.62mm) through-hole mounting
• Base product number: 74HCT259 series designation

Acceptable Variation Parameters:

• Propagation delay: Substitute parts may meet or exceed performance (lower delay acceptable)
• Operating temperature range: Substitute parts may exceed the minimum range requirement
• Product status: Active parts are acceptable replacements for obsolete parts
• Manufacturer: Different manufacturers within the 74HCT logic family are acceptable

The identified substitute parts maintain functional equivalence through matching logic family standards, identical package specifications, and compatible electrical operating parameters.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT259E (Texas Instruments) is a direct functional substitute for the 74HCT259N,652. This part maintains identical supply voltage specifications, output drive capability, and package form factor. The CD74HCT259E demonstrates improved propagation delay performance (16ns versus 20ns) and an extended operating temperature range (-55°C to 125°C), providing enhanced reliability margins. Both parts maintain ROHS3 compliance and REACH unaffected status. The CD74HCT259E is currently in active production status, ensuring long-term availability and supply chain stability.

74HCT259D,652 (NXP Semiconductors) is the manufacturer-recommended substitute from NXP's active product portfolio. This part shares the same base product number designation and maintains NXP's manufacturing standards. As an active product with unlimited moisture sensitivity rating, it provides a direct replacement path for the obsolete 74HCT259N,652 variant.

Both substitute parts are suitable for new designs and legacy system maintenance applications where the 74HCT259N,652 is no longer available.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT259E replace the 74HCT259N,652 in existing circuit designs?

A: Yes. The CD74HCT259E maintains identical supply voltage range (4.5V ~ 5.5V), output current specifications (4mA/4mA), and 16-DIP package form factor. The improved propagation delay (16ns) is a performance enhancement that does not affect functional compatibility. Direct socket substitution is supported.

Q: What is the difference between the 74HCT259D,652 and 74HCT259N,652?

A: Both parts share the same base product number (74HCT259) and logic family designation. The primary difference is product status: the 74HCT259N,652 is obsolete, while the 74HCT259D,652 is active. The 74HCT259D,652 represents NXP's current production equivalent.

Q: Are there package compatibility considerations when substituting these parts?

A: All three parts use the 16-DIP (0.300", 7.62mm) through-hole package. Pin configuration and mechanical dimensions are identical, ensuring direct board-level compatibility without layout modifications.

Q: Do substitute parts maintain the same compliance certifications?

A: Yes. Both CD74HCT259E and 74HCT259D,652 maintain ROHS3 compliance and REACH unaffected status, matching the original 74HCT259N,652 certifications.

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

A: The CD74HCT259E is recommended for new designs due to active production status, improved performance characteristics, and availability from a major semiconductor manufacturer. The 74HCT259D,652 is suitable for designs requiring NXP-specific sourcing or existing NXP supply chain integration.