74HC258DB,118 Equivalent & Substitute Parts

Part Overview

The 74HC258DB,118 is a 4 x 2:1 multiplexer logic integrated circuit manufactured by NXP USA Inc. in a 16-SSOP surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates across a single supply voltage range of 2V to 6V with output current capabilities of 7.8mA for both high and low states, serving applications requiring signal multiplexing in digital logic circuits.

Substiute Parts

74HC258DB,118

NXP USA Inc.In Stock: 72774HC258DB,118 Datasheet

Current PartRFQ

SN74HC157DBR

Texas InstrumentsIn Stock: 3165SN74HC157DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC258DB,118 is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: Both parts must implement a 4 x 2:1 multiplexer topology
• Package Type: Both parts must use 16-SSOP surface mount packaging with identical physical dimensions (0.209", 5.30mm Width)
• Voltage Supply Range: Both parts must operate within 2V ~ 6V single supply specification
• Output Current Capability: Both parts must deliver 7.8mA output current for high and low states
• Electrical Characteristics: Both parts must maintain compatibility across the specified operating temperature and voltage parameters
• Compliance Standards: Both parts must meet ROHS3 and REACH requirements

The SN74HC157DBR from Texas Instruments meets all substitution criteria as a functionally equivalent alternative to the obsolete 74HC258DB,118.

Parameter Comparison

Engineering Selection Recommendations

The SN74HC157DBR is a direct functional substitute for the obsolete 74HC258DB,118. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

The primary consideration for selection is the operating temperature range. The original 74HC258DB,118 operates to 125°C, while the SN74HC157DBR operates to 85°C. Applications requiring operation above 85°C must evaluate alternative solutions or confirm that the design's maximum operating temperature does not exceed the substitute's specification.

The SN74HC157DBR is actively manufactured by Texas Instruments and available in standard packaging (Tape & Reel), ensuring supply chain continuity and long-term availability compared to the obsolete NXP part.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC157DBR directly replace the 74HC258DB,118 in existing designs?

A: Yes, the SN74HC157DBR is a direct functional equivalent. Both parts share identical circuit configuration (4 x 2:1 multiplexer), package type (16-SSOP), voltage supply range (2V ~ 6V), and output current specifications (7.8mA). Pin-for-pin compatibility and electrical characteristics are equivalent.

Q: What is the key difference between these two parts?

A: The operating temperature range differs. The 74HC258DB,118 operates from -40°C to 125°C, while the SN74HC157DBR operates from -40°C to 85°C. Applications operating above 85°C require confirmation that this temperature limit does not conflict with design requirements.

Q: Are both parts compliant with current environmental standards?

A: Yes. Both the 74HC258DB,118 and SN74HC157DBR are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and procurement.

Q: What packaging options are available for the substitute part?

A: The SN74HC157DBR is supplied in Tape & Reel (TR) packaging, the standard format for surface mount components in production environments. This packaging format is suitable for automated assembly processes.

Q: Why is the original part listed as obsolete?

A: The 74HC258DB,118 is classified as obsolete by NXP USA Inc., indicating that the manufacturer has discontinued production. The SN74HC157DBR from Texas Instruments remains in active production, providing a reliable alternative for new designs and production continuity.