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Product Detailed Parameters
- Description：MUX, AS SERIES, 4 LINE INPUT TTL
- 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 SN74AS353BD is a dual 1-of-4 data selector/multiplexer manufactured by Texas Instruments. It features two independent multiplexers, each selecting one of four data inputs based on two select lines. The device provides three-state outputs for bus-oriented applications. It operates within a supply voltage range of 4.5V to 5.5V and supports TTL logic levels. The component is housed in a 16-pin SOIC package and is rated for an operating temperature range of 0°C to 70°C.
Feature Summary
- Dual independent 4-to-1 multiplexing capability
- Three-state output drivers for bus isolation
- TTL-compatible input logic levels
- Standard 16-pin SOIC surface-mount packaging
Applications
- Bus-oriented memory addressing systems
- Data routing in industrial control circuits
- Signal switching in legacy TTL-based equipment
Procurement Notes
Verify the specific suffix 'BD' indicates the standard SOIC package and commercial temperature grade. Confirm the manufacturer is Texas Instruments to ensure authenticity. Check for obsolescence status as AS series components may be discontinued or limited in availability. Ensure the supplier provides valid traceability documentation for critical applications.
Selection Notes
Select this component when dual independent signal routing with tri-state output control is required in TTL environments. It is suitable for designs needing compact integration of multiple multiplexers without external gating. Consider pin compatibility with existing PCB layouts if replacing older variants. Verify voltage tolerance matches the system's 5V logic standards.
Part Context
This part belongs to the Texas Instruments SN74AS series, known for advanced Schottky logic technology offering higher speed than standard 74LS devices. The SN74AS353 specifically addresses needs for dual-channel data selection in digital systems. It serves as a functional replacement for similar dual multiplexers in retrofitted or maintained industrial hardware.
Replacement Considerations
Direct substitutes include other SN74AS353 variants with different package options (e.g., SN) or temperature grades (e.g., N). Cross-reference with SN74S353 for pin-compatible alternatives, noting potential speed differences. Verify that any replacement maintains the three-state output functionality and TTL input thresholds.
