SN74159N Equivalent & Substitute Parts

Part Overview

The SN74159N is a Decoder/Demultiplexer IC with 1 x 4:16 circuit configuration, manufactured by Texas Instruments in the 7400 series. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and production continuity. The SN74159N operates as a single-supply logic decoder in a 24-DIP through-hole package, suitable for applications requiring address decoding and signal demultiplexing in legacy systems.

Substiute Parts

SN74159N

Texas InstrumentsIn Stock: 2186SN74159N Datasheet

Current PartRFQ

CD74HC4514M96

Texas InstrumentsIn Stock: 2230CD74HC4514M96 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74159N is determined by the following critical parameters:

• Functional Equivalence: Decoder/Demultiplexer type with 1 x 4:16 circuit configuration
• Independent Circuits: Single circuit requirement (1)
• Voltage Supply Compatibility: Single supply operation
• Package Compatibility: Electrical pin compatibility and functional pin mapping
• Compliance Requirements: RoHS3 compliance and REACH status alignment

The CD74HC4514M96 qualifies as a manufacturer-recommended substitute based on identical circuit configuration (1 x 4:16), matching independent circuit count, and equivalent functional operation. Both parts maintain single-supply decoder/demultiplexer functionality with compatible pin assignments for the 16 output lines and 4 address input lines.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC4514M96 is the manufacturer-recommended substitute for the obsolete SN74159N. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new production.

The CD74HC4514M96 offers extended operating temperature range (-55°C ~ 125°C versus 0°C ~ 70°C) and broader voltage supply compatibility (2V ~ 6V versus 4.75V ~ 5.25V), providing enhanced operational flexibility in diverse environmental conditions.

The primary design consideration is the transition from through-hole DIP packaging to surface-mount SOIC packaging. This change requires PCB layout modification and assembly process adjustment but maintains functional pin compatibility for decoder/demultiplexer operation.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC4514M96 directly replace the SN74159N in existing through-hole designs?

A: The CD74HC4514M96 is a surface-mount component in 24-SOIC packaging, whereas the SN74159N uses 24-DIP through-hole packaging. Direct socket replacement is not possible without PCB redesign and assembly process modification. However, the functional pin mapping and circuit configuration are equivalent.

Q: What are the key electrical differences between these parts?

A: Both parts function as 1 x 4:16 decoder/demultiplexers with single-supply operation. The CD74HC4514M96 specifies output current ratings (5.2mA high and low), operates across a wider voltage range (2V ~ 6V), and supports extended temperature operation (-55°C ~ 125°C). The SN74159N operates within 4.75V ~ 5.25V and 0°C ~ 70°C.

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both the SN74159N and CD74HC4514M96 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and use.

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

A: The CD74HC4514M96 is supplied in Cut Tape (CT) and Digi-Reel® packaging formats in 24-SOIC surface-mount configuration. No through-hole DIP variant of the 74HC4514 series is specified in the provided data.

Q: Can the CD74HC4514M96 operate at the same voltage as the SN74159N?

A: Yes. The CD74HC4514M96 voltage supply range of 2V ~ 6V encompasses the SN74159N operating range of 4.75V ~ 5.25V, ensuring voltage compatibility for direct functional substitution in equivalent circuit designs.