74LVC27DB,118 Equivalent & Substitute Parts

Part Overview

The 74LVC27DB,118 is a NOR Gate IC featuring 3 channels with 3 inputs per channel, manufactured by NXP USA Inc. in a 14-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 74LVC series operates across a low-voltage supply range of 1.2V to 3.6V, making it suitable for battery-powered and low-power applications.

Substiute Parts

74LVC27DB,118

NXP USA Inc.In Stock: 94274LVC27DB,118 Datasheet

Current PartRFQ

SN74LV27ADBR

Texas InstrumentsIn Stock: 3225SN74LV27ADBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74LVC27DB,118 is determined by the following critical parameters:

• Logic Function: NOR Gate with 3 channels and 3 inputs per channel
• Package Compatibility: 14-SSOP surface mount package with identical physical dimensions
• Operating Temperature Range: -40°C to 85°C
• Supply Voltage Compatibility: The substitute must operate within overlapping voltage ranges or support the primary operating voltage of the original design
• Electrical Performance: Output current drive capability and propagation delay characteristics must be suitable for the application

The SN74LV27ADBR from Texas Instruments meets these substitution criteria. While it operates across a different supply voltage range (2V ~ 5.5V), it maintains functional equivalence for applications designed around the 74LVC27 logic family and shares identical package geometry and pin configuration.

Parameter Comparison

Engineering Selection Recommendations

The SN74LV27ADBR is the designated manufacturer-recommended substitute for the obsolete 74LVC27DB,118. Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

The primary consideration for substitution is supply voltage compatibility. The 74LVC27DB,118 operates at 1.2V to 3.6V, while the SN74LV27ADBR operates at 2V to 5.5V. For applications operating at 2V or above, the SN74LV27ADBR provides direct functional replacement. Applications requiring operation below 2V require alternative solutions outside this substitute group.

The SN74LV27ADBR offers improved quiescent current characteristics (20 µA versus 40 µA) and is currently in active production status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the SN74LV27ADBR directly replace the 74LVC27DB,118 in all applications?

A: Direct replacement is possible when the application operates at supply voltages of 2V or above. The SN74LV27ADBR is not suitable for applications requiring operation below 2V supply voltage.

Q: Are the packages physically identical?

A: Yes. Both components use the 14-SSOP package with identical physical dimensions (0.209" width, 5.30mm). Pin configuration and footprint are identical, allowing direct PCB substitution.

Q: What are the differences in electrical performance?

A: The SN74LV27ADBR exhibits lower quiescent current (20 µA versus 40 µA) and reduced output drive capability (12mA versus 24mA). Propagation delay is longer at 7.9ns compared to 2.4ns. These differences must be evaluated against application timing and power budget requirements.

Q: Why is the 74LVC27DB,118 listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by NXP USA Inc. The SN74LV27ADBR from Texas Instruments provides functional continuity for designs requiring NOR gate logic in the 14-SSOP package.

Q: Are both parts RoHS compliant?

A: Yes. Both the 74LVC27DB,118 and SN74LV27ADBR are ROHS3 compliant with Moisture Sensitivity Level 1 (unlimited shelf life).