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Product Detailed Parameters
- Description：IC DECODER/DRIVER ALS SERIES
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Type：-
- Circuit：-
- Independent Circuits：-
- Current - Output High, Low：-
- Voltage Supply Source：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The SN74ALS155D is a high-speed ALS logic decoder/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation in a 16-SOIC package. The device functions as a 1-to-4 decoder or demultiplexer with active-low outputs and includes an enable input for control. It is designed for operation across a temperature range of 0°C to 70°C, ensuring reliable performance in standard commercial environments.
Feature Summary
- Functions as a single 1-to-4 decoder or demultiplexer circuit
- Features active-low outputs for direct interfacing
- Includes an enable input for output control
Applications
- Data routing and distribution systems
- Address decoding in memory architectures
- Control signal generation in digital logic circuits
Procurement Notes
Verify the specific suffix 'D' confirms the SOIC surface-mount package variant. Confirm the manufacturer is Texas Instruments to ensure component authenticity. Check current production status as legacy ALS series components may be discontinued or subject to obsolescence notices. Validate RoHS compliance requirements against project specifications before procurement.
Selection Notes
Select this component when a compact 1-to-4 decoding solution is required in surface-mount designs. The ALS series offers faster switching speeds compared to standard LS logic while maintaining compatible pinouts. Ensure the design utilizes a 5V supply rail and accommodates the active-low output polarity. Verify that the thermal environment remains within the specified 0°C to 70°C operating range.
Part Context
This part belongs to the Texas Instruments SN74ALS family of advanced low-power Schottky logic devices. These components are engineered for high-speed digital applications requiring reduced power consumption relative to earlier generations. The SN74ALS155 specifically addresses needs for address decoding and data selection in complex integrated circuits.
Replacement Considerations
Public confirmed substitute part numbers: SN74ALS155DR, SN74ALS155N.
