SN74LS645NG4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS645NG4 is an octal bus transceiver from the Texas Instruments 74LS series. It features non-inverting logic with three-state outputs and a single direction control input. The device operates within a supply voltage range of 4.75V to 5.25V and supports a commercial operating temperature range of 0°C to 70°C. It utilizes a 20-pin PDIP package for through-hole mounting.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceiver architecture providing eight independent data channels
• Non-inverting signal transmission with controlled directionality
• Three-state output capability enabling direct system bus interfacing

Buffers, Drivers, Receivers, Transceivers Applications

• Memory module data bus interfacing
• Microprocessor-based system data routing
• Controlled bidirectional data transfer between logic blocks

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the 'G4' suffix corresponds to lead-free RoHS compliance as per manufacturer standards. Confirm the specific package variant matches the required PCB footprint, as the base model number may be available in different housing types such as SOIC or DIP. Ensure the component status aligns with long-term production availability requirements.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when non-inverting octal data transfer with three-state isolation is required. Compare against the SN74LS640 if inverted logic functionality is needed instead. Verify that the low-power Schottky (LS) speed and power consumption characteristics meet the specific circuit design constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN54LS/74LS64x family of octal bus transceivers. The SN74LS645 specifically provides non-inverting operation, distinguishing it from the SN74LS640 which offers inverting logic. Both variants utilize three-state outputs for effective bus management.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS645N serves as a standard PDIP replacement. SN74LS645NSR is suitable for surface-mount applications.