MM74HC259SJ Equivalent & Substitute Parts

Part Overview

The MM74HC259SJ is a D-Type, Addressable 1:8 decoder/latch IC manufactured by onsemi in 16-SOP surface mount packaging. This logic component features 8-bit addressable latch functionality with standard output configuration, operating across a 2V to 6V supply voltage range. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

MM74HC259SJ

onsemiIn Stock: 1143MM74HC259SJ Datasheet

Current PartRFQ

74HC259D,653

Nexperia USA Inc.In Stock: 227274HC259D,653 Datasheet

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CD74HC259M96

Texas InstrumentsIn Stock: 1548CD74HC259M96 Datasheet

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CD74HC259MT

Texas InstrumentsIn Stock: 1685CD74HC259MT Datasheet

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SN74HC259D

Texas InstrumentsIn Stock: 3354SN74HC259D Datasheet

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SN74HC259DR

Texas InstrumentsIn Stock: 2265SN74HC259DR Datasheet

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SN74HC259DT

Texas InstrumentsIn Stock: 1900SN74HC259DT Datasheet

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SN74HC259NSR

Texas InstrumentsIn Stock: 3306SN74HC259NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC259SJ is determined by the following critical parameters:

Core Functional Requirements:

• Logic Type: D-Type, Addressable
• Circuit Configuration: 1:8 decoder/latch
• Output Type: Standard
• Supply Voltage Range: 2V ~ 6V (minimum overlap required)
• Independent Circuits: 1
• Output Current Capability: 5.2mA minimum (High and Low)

Mechanical Compatibility:

• Mounting Type: Surface Mount
• Package Family: 16-SOIC or 16-SOP variants (pin-compatible)

Electrical Performance:

• Propagation Delay: 17ns or faster acceptable
• Operating Temperature: Must support at least -40°C ~ 85°C minimum range

All substitute parts listed maintain identical functional specifications within the 74HC259 base product family. Variations in package width (0.154" vs 0.209"), temperature range extensions, and propagation delay improvements do not affect functional substitutability for standard applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Active Status: SN74HC259DR (Texas Instruments) and SN74HC259NSR (Texas Instruments) are the preferred substitutes. Both parts maintain active product status with RoHS3 compliance and REACH unaffected certification. SN74HC259NSR matches the original 0.209" package width, eliminating any PCB layout considerations. SN74HC259DR offers the narrower 0.154" package variant with identical electrical performance.

Secondary Recommendation - Extended Temperature Range: CD74HC259M96 (Texas Instruments) provides extended operating temperature range (-55°C ~ 125°C) with improved propagation delay (13ns vs 17ns) and RoHS3 compliance. This option suits applications requiring enhanced thermal performance specifications.

Alternative - Active Procurement: 74HC259D,653 (Nexperia USA Inc.) maintains active status with extended temperature range (-40°C ~ 125°C) and RoHS3 compliance, offering a second-source alternative from a different manufacturer.

Avoid - Discontinued Status: CD74HC259MT, SN74HC259D, and SN74HC259DT are discontinued at DiGi Electronics and should not be selected for new designs requiring long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MM74HC259SJ with any of these substitute parts? A: Yes, all listed substitute parts are functionally equivalent within the 74HC259 logic family. They share identical logic type (D-Type, Addressable), circuit configuration (1:8), output type (Standard), supply voltage range (2V ~ 6V), and output current specifications (5.2mA). Pin compatibility is maintained across all 16-SOIC and 16-SOP package variants.

Q: What is the difference between the 0.154" and 0.209" package widths? A: Both are 16-SOIC surface mount packages with identical pin pitch and electrical characteristics. The width difference reflects manufacturing variations between suppliers. The 0.209" width (SN74HC259NSR) matches the original MM74HC259SJ package. The 0.154" width variants are standard industry packages. PCB footprints must accommodate the specific width of the selected part.

Q: Why do some substitutes have faster propagation delay (13ns vs 17ns)? A: Propagation delay improvements reflect manufacturing process enhancements by different suppliers. A faster delay (13ns) is electrically superior and does not create compatibility issues. Applications designed for 17ns operation will function correctly with 13ns parts.

Q: Which substitute offers the best long-term availability? A: SN74HC259DR and SN74HC259NSR (Texas Instruments) maintain active product status. 74HC259D,653 (Nexperia USA Inc.) also maintains active status as a second-source option. These three parts are recommended for designs requiring sustained procurement.

Q: Are all substitutes RoHS3 compliant? A: Yes, all substitute parts listed carry RoHS3 compliance certification. The original MM74HC259SJ does not specify RoHS status. All substitutes are REACH unaffected and carry EAR99 export classification.

Q: Can I use CD74HC259M96 in applications with temperature extremes? A: CD74HC259M96 supports -55°C ~ 125°C operating range, extending beyond the original MM74HC259SJ specification (-40°C ~ 85°C). This part is suitable for applications requiring enhanced thermal performance. Standard applications operating within -40°C ~ 85°C will function identically with any substitute listed.