SN74LS641DW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS641DW is an octal bus transceiver manufactured by onsemi, housed in a 20-SOIC surface-mount package. It operates within a supply voltage range of 4.75V to 5.25V and supports data transmission rates with a maximum propagation delay of 23ns at 5V with 45pF load. The device features low output drive capabilities, specified as 400µA for high state and 24mA for low state. Designed for industrial temperature ranges from 0°C to 75°C, it facilitates bidirectional data flow between two buses.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration enabling simultaneous eight-bit data transfer
• Bidirectional bus architecture supporting dual-direction communication
• Low-voltage TTL compatibility ensuring integration with standard logic families

Buffers, Drivers, Receivers, Transceivers Applications

• Memory mapping systems requiring address/data bus isolation
• General-purpose bidirectional data buffering applications
• Computer peripheral interface circuits

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the manufacturer designation carefully, as this part number originates from Texas Instruments but is distributed by onsemi. Confirm the specific revision level and RoHS compliance status against current datasheets, as legacy LS series components may have varying environmental certifications or end-of-life statuses depending on the production batch.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring robust octal-level translation between 5V logic domains. Ensure the application does not demand higher speed performance than the LS family provides. Consider pinout compatibility with original TI designs if replacing existing boards. Verify that the 20-SOIC footprint matches the PCB layout constraints and thermal requirements of the final assembly.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the standard 74LS logic family, widely used in legacy digital systems. While originally developed by Texas Instruments, onsemi distributes this specific part number. It serves as a fundamental building block for data routing in older computer architectures and industrial control panels where reliable, moderate-speed signal transmission is prioritized over high-frequency performance.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include the SN74LS641N (PDIP version) or equivalent octal bus transceivers from other manufacturers such as NXP or STMicroelectronics. Ensure logical equivalence regarding pin configuration and electrical characteristics before substitution.