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Product Detailed Parameters
- Description：IC GATE NOR 3CH 3-INP 14SOIC
- Series：74ALS
- Mfr：Texas Instruments
- Package：Bulk,Tube
- 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 SN74ALS27AD is a single-function logic gate manufactured by Texas Instruments, belonging to the ALS (Advanced Low-power Schottky) series. It implements three independent 3-input NOR gates within a single package. The device operates with a supply voltage range of 4.5 V to 5.5 V and features a propagation delay of 15 ns. It provides a low-level output current of 8 mA and a high-level output current of -400 uA. The component is housed in a SOIC-14 surface-mount package and supports an operating temperature range from 0°C to +70°C.
Feature Summary
- Integrates three independent 3-input NOR logic functions for complex boolean operations.
- Utilizes Advanced Low-power Schottky technology to balance speed and power consumption.
- Provides robust low-level sink current capability for driving loads.
Applications
- Digital logic circuit design requiring multi-input NOR functionality
- Microprocessor interface circuits
- General-purpose digital systems
Procurement Notes
Verify the specific suffix 'AD' corresponds to the SOIC-14 package and commercial temperature grade when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors prior to procurement. Ensure the ordering part number matches the required package style and electrical specifications exactly.
Selection Notes
Select this component when three separate 3-input NOR gates are required in a compact surface-mount form factor. The ALS series offers faster switching speeds compared to standard LS logic while maintaining lower power dissipation than standard TTL. Verify that the 4.5V to 5.5V supply voltage range aligns with the system's power architecture.
Part Context
This part belongs to the Texas Instruments SN74ALS27A family of single-function gates. It is distinct from other variants such as the SN74ALS27AN, which utilizes a PDIP-14 through-hole package instead of the surface-mount SOIC-14 configuration found in the AD suffix version.
Replacement Considerations
The SN74ALS27AN serves as a pin-compatible alternative offering identical logical functionality but packaged in a PDIP-14 through-hole format rather than the surface-mount SOIC-14 configuration.
