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Product Detailed Parameters
- Description：IC SELECTOR/MUX 1OF8 3ST 16SO
- 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 SN74ALS251NS is a single-function logic integrated circuit manufactured by Texas Instruments, belonging to the SN74ALS series. It functions as an 8-to-1 data selector or multiplexer with three-state outputs. The device utilizes a 16-pin SOIC surface-mount package and operates within a supply voltage range of 4.5 V to 5.5 V. It supports a wide operating temperature range from 0°C to +70°C. Key electrical characteristics include a low-level output current capability of 24 mA and a high-level output current of -12 mA. The propagation delay is specified at 20 ns.
Feature Summary
- Provides eight selectable data inputs routed to a single output line
- Features three-state outputs for bus-driven applications
- Includes dedicated strobe input for controlling data transmission
Applications
- Data routing in digital communication systems
- Address decoding circuits
- Multiplexing sensor data for microprocessor interfaces
Procurement Notes
Verify the specific suffix 'NS' confirms the SOIC-16 package and industrial temperature grade. Confirm RoHS compliance status through the official datasheet or manufacturer documentation prior to procurement. Ensure the ordering part number matches the required pinout and electrical specifications exactly.
Selection Notes
Select this component when an 8-channel multiplexer with three-state buffering is required. It is suitable for designs needing moderate speed (20 ns delay) and standard TTL-compatible logic levels. Consider alternative packages if higher pin counts or different thermal performance are needed.
Part Context
This component is part of the Texas Instruments SN74ALS family, which offers Advanced Low-power Schottky logic performance. The SN74ALS251 variant specifically addresses applications requiring efficient data selection and bus isolation in standard digital logic environments.
Replacement Considerations
Compatible substitutes include other SN74ALS251 variants with identical logical function and pinout. Verify package compatibility and electrical parameters before substitution.
