SN74HC158PW Equivalent & Substitute Parts

Part Overview

The SN74HC158PW is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-TSSOP surface mount package. This component is classified as Last Time Buy, indicating limited availability for future procurement. The SN74HC158PW operates across a 2V to 6V supply range with symmetric output current specifications of 7.8mA for both high and low states, making it suitable for standard logic-level applications requiring multiplexing functionality.

Identifying equivalent and substitute parts is necessary due to the Last Time Buy status, which restricts long-term availability. Alternative part numbers within the 74HC series provide functionally compatible solutions while maintaining identical electrical and mechanical specifications.

Substiute Parts

SN74HC158PW

Texas InstrumentsIn Stock: 2822SN74HC158PW Datasheet

Current PartRFQ

SN74HC158PWR

Texas InstrumentsIn Stock: 4065SN74HC158PWR Datasheet

MFR RecommendedRFQ

SN74HC157PW

Texas InstrumentsIn Stock: 7157SN74HC157PW Datasheet

Parametric EquivalentRFQ

SN74HC257PW

Texas InstrumentsIn Stock: 1310SN74HC257PW Datasheet

Parametric EquivalentRFQ

SN74HC258PW

Texas InstrumentsIn Stock: 2679SN74HC258PW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC158PW is determined by strict parameter matching across the following criteria:

Electrical Parameters: Voltage supply range (2V ~ 6V), output current specifications (7.8mA high and low), operating temperature range (-40°C ~ 85°C), and circuit configuration (4 x 2:1 multiplexer with 1 independent circuit).

Mechanical Parameters: Package type (16-TSSOP), mounting method (Surface Mount), and physical dimensions (0.173", 4.40mm Width).

Compliance Parameters: RoHS3 compliance, MSL rating of 1, and REACH unaffected status.

All substitute parts listed maintain identical values across these parameters, ensuring direct functional and physical compatibility without design modification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SN74HC158PWR is the recommended substitute for new designs and procurement. This part maintains Active product status with higher current inventory (4028 pcs), ensuring supply continuity. The only difference from SN74HC158PW is the packaging format (Tape & Reel versus Tube), which does not affect electrical or mechanical compatibility.

Alternative Substitutes: SN74HC157PW, SN74HC257PW, and SN74HC258PW are parametrically equivalent alternatives. These parts satisfy all electrical and mechanical requirements but carry Discontinued or Last Time Buy status designations. Selection among these alternatives should be based on current inventory availability and procurement timelines.

Compliance Assurance: All substitute parts maintain ROHS3 compliance, MSL rating of 1, and REACH unaffected status, meeting regulatory requirements equivalent to the primary part.

Frequently Asked Questions (FAQ)

Q: Can SN74HC158PWR replace SN74HC158PW directly? A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format: SN74HC158PWR uses Tape & Reel packaging while SN74HC158PW uses Tube packaging. This distinction affects handling and assembly processes but not component functionality or performance.

Q: What makes SN74HC157PW, SN74HC257PW, and SN74HC258PW suitable substitutes? A: These parts match all critical parameters: 4 x 2:1 multiplexer configuration, 16-TSSOP package, 2V to 6V supply voltage, 7.8mA output current specifications, -40°C to 85°C operating range, and identical compliance certifications. The different base product numbers (157, 257, 258 versus 158) reflect internal design variations that do not affect functional compatibility for this application category.

Q: Why is SN74HC158PW marked as Last Time Buy? A: Last Time Buy status indicates the manufacturer has discontinued or will discontinue production. This designation requires users to secure inventory before availability ends. Identifying and qualifying substitute parts ensures design continuity and supply chain resilience.

Q: Are there packaging considerations when switching between Tube and Tape & Reel formats? A: Yes. Tube packaging is suitable for manual assembly and lower-volume applications. Tape & Reel packaging is optimized for automated pick-and-place assembly and higher-volume production. Component electrical performance remains identical; the choice depends on manufacturing process requirements.

Q: Do all substitute parts meet the same compliance standards? A: Yes. All listed substitutes maintain ROHS3 compliance, MSL rating of 1 (Unlimited moisture sensitivity), and REACH unaffected status, matching the regulatory profile of SN74HC158PW.