SN74LS540DBR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS540DBR is an octal buffer and line driver manufactured by Texas Instruments, belonging to the 74LS logic series. It features eight inverting inputs and outputs with three-state capability, housed in a 20-pin SOIC package. The device operates within a supply voltage range of 4.75 V to 5.25 V. Key electrical parameters include a high-level output current of -15 mA and a low-level output current of 24 mA. Propagation delay is typically 15 ns at 5 V, with a maximum operating temperature of +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight independent inverting buffer channels for bus-oriented transmission and reception.
• Three-state outputs enable direct connection to bus lines without external drivers, facilitating easier microprocessor interface layout.
• PNP input structure reduces loading on driving circuits while hysteresis improves noise margin stability.

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmitters and receivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'DBR' against the manufacturer's current datasheet to confirm package type (SOIC) and tape-and-reel packaging status. Confirm RoHS compliance details as these specifications may vary by production batch. Ensure the component meets the required operating temperature range for your specific application environment before finalizing procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring octal buffering with three-state outputs for bus management. It is suitable for applications needing moderate speed performance with standard TTL compatibility. Consider the SOIC package for surface-mount assembly requirements. Verify that the 5V supply voltage and current drive capabilities align with the load requirements of the connected bus lines.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74LS540 family of octal buffers and line drivers. It shares functional similarities with the SN74LS240 but utilizes a pinout arrangement where inputs and outputs are located on opposite sides of the package. This design facilitates easier printed circuit board layout and improved density when interfacing with microprocessors.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Compatible substitutes include SN74LS540N and SN74LS540DW from Texas Instruments, provided the package style matches the design constraints. Other manufacturers producing equivalent 74LS540 devices may also serve as replacements if pinouts and electrical characteristics are verified.