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Product Detailed Parameters
- Description：BUS EXCHANGER, LS 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：-
Download product information
Overview
The SN74LS440DW is a quad bus exchanger from the LS logic series, manufactured by Texas Instruments. It features four independent bidirectional data buses with separate direction control inputs for each bus. The device utilizes a 20-pin SOIC package and operates within a supply voltage range of 4.5 V to 5.5 V. It supports surface mount installation and functions reliably across an operating temperature range of 0°C to +70°C.
Feature Summary
- Provides four independent bidirectional data buses
- Features separate direction control inputs for each bus
- Supports high-speed data transfer in digital systems
Applications
- Data bus exchange applications
- Microprocessor-based systems
- Memory mapping circuits
Procurement Notes
Verify the specific revision level and packaging details against the official datasheet before procurement. Confirm that the SOIC-20 package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your system's environmental specifications. Check for any end-of-life notices or obsolescence warnings directly from the manufacturer.
Selection Notes
Select this component when designing systems requiring multiple isolated bidirectional data paths. The separate direction controls allow flexible routing between different bus segments. Consider the LS series speed and power characteristics relative to other logic families. Verify compatibility with your system's voltage levels and signal integrity requirements.
Part Context
This part belongs to the standard 74LS logic family, known for balanced performance and wide availability. It serves as a fundamental building block for digital interface designs. The SN74LS440DW specifically addresses needs for multi-bus architectures in embedded controllers and communication interfaces.
Replacement Considerations
Check for direct pin-compatible alternatives within the same logic family. Verify electrical parameters such as propagation delay and output drive strength. Ensure the replacement maintains the same package type and thermal characteristics.
