SN74LS640NSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS640NSR is an octal bus transceiver with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports data transfer rates up to 30 MHz. The device features independent direction control for each byte and includes a write protect function. It is housed in a 20-pin Small Outline Package (SOP) with a lead pitch of 1.27 mm. The component is RoHS compliant and designed for commercial temperature ranges from 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight bidirectional data paths
• Three-state outputs allowing direct system bus interconnection
• Independent direction control for flexible data flow management
• Write protect capability to prevent unintended data writes

Buffers, Drivers, Receivers, Transceivers Applications

• Memory mapping applications requiring high-speed data transfer
• Bus-oriented architectures connecting microprocessors to peripherals
• Control circuits managing bidirectional data flow between systems

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix NSR confirms the tape and reel packaging format. Confirm the active production status aligns with current project requirements. Ensure compatibility with standard SOP footprint dimensions during PCB layout verification.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal transceiver with three-state outputs is required for bidirectional data buses. Consider the LS logic family characteristics regarding speed and power consumption relative to system needs. Verify that the SOP package fits available board space constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74LS64x series of octal bus transceivers. It shares functional similarities with other variants in the family but differs in output structure, specifically offering three-state outputs compared to open-collector alternatives. It serves as a standard interface solution for TTL-compatible digital systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS640DWR offers identical functionality in a SOIC package. SN74LS640N provides the same electrical characteristics in a PDIP package. Cross-reference pinouts and thermal requirements before substitution.