SN74LS645NS

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS645NS is an octal bus transceiver from the Texas Instruments 74LS logic family, housed in a 20-pin SOIC package. It features non-inverting data transfer with three-state outputs and TTL-compatible input/output levels. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports a propagation delay of 15 ns at a load capacitance of 45 pF. Output drive capabilities include a maximum low-level current of 24 mA and a high-level current of -15 mA. It functions across a commercial temperature range of 0°C to +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bidirectional bus architecture for efficient parallel data transfer
• Three-state outputs enable direct connection to system buses without additional buffering
• TTL-compatible inputs and outputs ensure seamless integration with standard logic families

Buffers, Drivers, Receivers, Transceivers Applications

• High-performance memory module interfacing
• Instrumentation control systems
• Industrial process control networks

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'NS' confirms the 20-SOIC surface-mount package variant. Confirm RoHS compliance status as manufacturing processes may vary by production date. Ensure the application environment remains within the specified 0°C to +70°C operating temperature range to maintain signal integrity and device reliability.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal, non-inverting transceiver with TTL compatibility is required. The LS series offers a balance of speed and power consumption suitable for general-purpose digital systems. Consider alternative packages like N or DWR if through-hole or tape-and-reel formats are preferred for assembly.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the broader 74LS645 family of octal bus transceivers. While other variants exist in different packages such as PDIP or SOIC with reel packaging, the NS suffix specifically denotes the narrow SOIC footprint. This family provides standardized interface solutions for connecting microprocessors to peripheral devices.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS645NSR (Reel version), SN74LS645N (PDIP version), SN74LS645DW (Wide SOIC version). Verify pinout compatibility before substitution.