74HC27PW,112 Equivalent & Substitute Parts

Part Overview

The 74HC27PW,112 is a NOR Gate IC featuring 3 channels with 3 inputs per channel in a 14-TSSOP surface mount package, manufactured by Nexperia USA Inc. This component operates across a 2V to 6V supply voltage range with a maximum propagation delay of 15ns at 6V with 50pF load. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74HC27PW,112

Nexperia USA Inc.In Stock: 89574HC27PW,112 Datasheet

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SN74HC27DBR

Texas InstrumentsIn Stock: 12214SN74HC27DBR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC27PW,112 is determined by the following critical parameters:

• Logic function: NOR Gate with identical 3 channels and 3 inputs per channel
• Electrical specifications: Supply voltage range (2V ~ 6V), quiescent current (2 µA max), output current (5.2mA), propagation delay (15ns @ 6V, 50pF), and input logic levels
• Mounting type: Surface mount configuration
• Package compatibility: 14-pin TSSOP or equivalent 14-pin SSOP footprint
• Compliance: ROHS3 compliance and EAR99 classification

The SN74HC27DBR from Texas Instruments meets all substitution criteria. Both components share identical logic architecture, electrical performance characteristics, and compliance certifications. The primary distinction is packaging format (TSSOP versus SSOP) and product status (obsolete versus active).

Parameter Comparison

Engineering Selection Recommendations

The SN74HC27DBR is a direct functional equivalent for the 74HC27PW,112. Both components are ROHS3 compliant and classified under EAR99 export control. The SN74HC27DBR maintains active product status with established supply chain availability, whereas the 74HC27PW,112 is obsolete.

The operating temperature range of the SN74HC27DBR (-40°C ~ 85°C) is narrower than the 74HC27PW,112 (-40°C ~ 125°C). Applications requiring operation above 85°C must retain the original Nexperia component or identify alternative solutions.

Package geometry differs between the two parts: the 74HC27PW,112 uses 14-TSSOP (0.173" width, 4.40mm), while the SN74HC27DBR uses 14-SSOP (0.209" width, 5.30mm). PCB layout modifications may be required to accommodate the wider SSOP footprint.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC27DBR directly replace the 74HC27PW,112 in all applications?

A: Electrical and functional compatibility is complete. Physical PCB layout changes are required due to different package widths (TSSOP versus SSOP). Applications operating above 85°C require evaluation against the SN74HC27DBR's maximum temperature specification of 85°C.

Q: What is the primary difference between 14-TSSOP and 14-SSOP packages?

A: Both are 14-pin surface mount packages with identical pin counts and pitch. The SSOP variant has a wider body (5.30mm versus 4.40mm). Pin-to-pin electrical connectivity and signal integrity remain equivalent.

Q: Are there compliance or certification differences between these parts?

A: Both components are ROHS3 compliant, REACH unaffected, and classified as EAR99. No compliance barriers exist for substitution.

Q: Why is the 74HC27PW,112 listed as obsolete?

A: Manufacturer discontinuation determines obsolete status. The SN74HC27DBR from Texas Instruments provides continued access to the 74HC27 NOR gate function with active production and supply availability.

Q: What inventory considerations apply to this substitution?

A: The 74HC27PW,112 has 867 pieces in stock (new original). The SN74HC27DBR has 12,114 pieces available in tape and reel packaging, providing superior long-term supply security.