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Product Detailed Parameters
- Description：IC GATE NOR 3CH 3-INP 14SOIC
- Series：74ALS
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Logic Type：NOR Gate
- Number of Circuits：3
- Number of Inputs：3
- Features：-
- Voltage - Supply：4.5V ~ 5.5V
- Current - Quiescent (Max)：-
- Current - Output High, Low：400µA, 8mA
- Input Logic Level - Low：0.8V
- Input Logic Level - High：2V
- Max Propagation Delay @ V, Max CL：15ns @ 5V, 50pF
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Supplier Device Package：14-SOIC
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Grade：-
- Qualification：-
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Overview
The SN74ALS27ADRE4 is a single-function logic gate manufactured by Texas Instruments, belonging to the ALS series. It contains three independent 3-input NOR gates housed in a 14-pin SOIC package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation. Key electrical characteristics include a propagation delay of 15 ns, a low-level output current of 8 mA, and a high-level output current of -400 uA. It functions reliably across an operating temperature range from 0°C to +70°C.
Feature Summary
- Integrates three independent 3-input NOR logic gates within a single integrated circuit package.
- Utilizes Advanced Low-power Schottky (ALS) technology for optimized performance.
- Provides defined drive capabilities with specified low-level and high-level output currents.
Applications
- Digital logic circuits requiring multi-input NOR functionality
- Signal processing systems utilizing standard TTL-compatible logic families
- Industrial control applications operating within commercial temperature ranges
Procurement Notes
Verify the specific suffix 'E4' indicates lead-free composition and RoHS compliance status as per manufacturer documentation. Confirm the SOIC-14 package dimensions match the target PCB footprint requirements. Ensure the operating environment remains within the specified 0°C to +70°C thermal limits to maintain guaranteed electrical parameters. Cross-reference the datasheet revision history for any updates to timing or electrical specifications before final integration.
Selection Notes
Select this component when designing circuits that require multiple 3-input NOR operations without consuming excessive board space. The ALS series offers a balance between power consumption and speed suitable for general-purpose digital applications. Consider the 14-pin SOIC package for surface-mount assembly processes. Verify that the required input and output current levels align with the connected load specifications to ensure signal integrity.
Part Context
This part belongs to the SN74ALS27A family of triple 3-input NOR gates produced by Texas Instruments. The 'E4' suffix typically denotes environmental compliance features such as lead-free terminations. It serves as a discrete logic solution within the broader 74-series ecosystem, providing standardized interface compatibility for designers working with legacy or mixed-voltage digital systems.
Replacement Considerations
Compatible substitutes include the SN74ALS27AD and SN74ALS27ANSR. These variants share identical logical functions and pin configurations but may differ in packaging style or reel quantities. Verify that alternative parts meet the same ALS series electrical specifications and package dimensions for direct interchangeability.
