74HC259DB,112 Equivalent & Substitute Parts

Part Overview

The 74HC259DB,112 is an 8-bit addressable latch IC manufactured by Nexperia USA Inc., designed for D-Type addressable logic applications with a 1:8 circuit configuration. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The part operates across a 2V to 6V supply voltage range and is housed in a 16-SSOP surface mount package.

Substiute Parts

74HC259DB,112

Nexperia USA Inc.In Stock: 109774HC259DB,112 Datasheet

Current PartRFQ

SN74HC259PWR

Texas InstrumentsIn Stock: 132433SN74HC259PWR Datasheet

SimilarRFQ

SN74HC259PWT

Texas InstrumentsIn Stock: 3096SN74HC259PWT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC259DB,112 is determined by the following critical parameters:

• Logic Type: D-Type, Addressable
• Circuit Configuration: 1:8
• Output Type: Standard
• Voltage Supply Range: 2V ~ 6V (minimum overlap required)
• Independent Circuits: 1
• Current Output Capability: 5.2mA minimum (High and Low)
• RoHS3 Compliance
• Moisture Sensitivity Level: 1 (Unlimited)

The identified substitute parts maintain functional equivalence through identical logic architecture, circuit configuration, and electrical performance within the specified operating parameters. Package variations (16-SSOP vs. 16-TSSOP) represent acceptable mechanical substitutions for surface mount applications where PCB layout accommodates the dimensional differences.

Parameter Comparison

Engineering Selection Recommendations

SN74HC259PWR (Texas Instruments) is the primary substitute for the 74HC259DB,112. This part maintains full functional equivalence with identical logic architecture, circuit configuration, and electrical performance. The SN74HC259PWR is currently in active production status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 compliant and carry unlimited moisture sensitivity classification. The propagation delay improvement (13ns vs. 17ns) provides enhanced performance characteristics. The package transition from 16-SSOP to 16-TSSOP requires PCB layout verification due to dimensional differences (5.30mm vs. 4.40mm width), but both are standard surface mount packages compatible with automated assembly processes.

SN74HC259PWT (Texas Instruments) serves as a secondary substitute option. This part is functionally identical to the SN74HC259PWR but is discontinued at DiGi Electronics, limiting future availability. Selection of this part should be restricted to applications where existing inventory is available and long-term supply is not a requirement.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC259PWR directly replace the 74HC259DB,112 without circuit modifications?

A: Yes. Both parts share identical logic type (D-Type, Addressable), circuit configuration (1:8), output type (Standard), and electrical specifications (2V ~ 6V supply, 5.2mA output current). The primary consideration is package geometry; the SN74HC259PWR uses 16-TSSOP (4.40mm width) versus the original 16-SSOP (5.30mm width). PCB layout must accommodate this dimensional change.

Q: What is the difference between 16-SSOP and 16-TSSOP packages?

A: Both are 16-pin surface mount packages with identical pin pitch and electrical connectivity. The TSSOP variant features a narrower body width (4.40mm vs. 5.30mm), resulting in reduced PCB footprint. Pin-to-pin spacing and soldering requirements remain compatible with standard reflow processes.

Q: Why does the SN74HC259PWR have a faster propagation delay (13ns vs. 17ns)?

A: Propagation delay variation between parts of the same logic family reflects manufacturing process differences between Nexperia and Texas Instruments. The faster delay of the SN74HC259PWR represents improved performance and is functionally compatible with designs specified for the original 17ns timing.

Q: Are there temperature range considerations when substituting?

A: The 74HC259DB,112 operates across -40°C to 125°C, while the SN74HC259PWR operates across -40°C to 85°C. Applications requiring operation above 85°C must retain the original Nexperia part or identify alternative solutions. For standard industrial and commercial temperature ranges (-40°C to 85°C), the SN74HC259PWR is fully compatible.

Q: What is the availability status of these substitute parts?

A: The SN74HC259PWR is in active production with substantial inventory (132,400 pcs). The SN74HC259PWT is discontinued at DiGi Electronics with limited remaining inventory (2,987 pcs). For new designs and production continuity, the SN74HC259PWR is the recommended selection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both the 74HC259DB,112 and substitute parts (SN74HC259PWR, SN74HC259PWT) are ROHS3 compliant with unlimited moisture sensitivity classification (MSL 1), meeting current environmental and regulatory requirements.