SN74AS640N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AS640N is an octal bus transceiver from Texas Instruments' Advanced Schottky (ALS) logic family, housed in a 20-pin PDIP package. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device exhibits a propagation delay of 11 ns, with TTL-compatible input and output levels. It provides a low-level output current of 24 mA and supports operating temperatures from 0°C to +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight bidirectional data channels for high-density bus interfacing
• Advanced Schottky technology ensuring fast switching speeds with reduced power consumption
• Three-state outputs allowing direct connection to system buses without additional drivers

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed digital logic systems requiring efficient data transfer
• Memory module interfacing in computer architectures
• Control signal routing in industrial automation equipment

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'N' corresponds to the 20-pin Plastic Dual In-Line Package (PDIP) variant. Confirm that the component meets RoHS compliance standards if required by your manufacturing process. Ensure the ordering part number matches the exact Texas Instruments designation to avoid receiving alternative logic families or package types.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when system requirements demand faster propagation delays than standard LS logic but do not necessitate the higher speed of AS series devices. It is suitable for designs requiring TTL-compatible I/O levels with moderate drive strength. Consider thermal management capabilities within the specified commercial temperature range during PCB layout.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74ALS640 series of octal bus transceivers. It serves as a bridge between microprocessors and peripheral devices, facilitating reliable data transmission across multiple lines. The ALS family balances speed and power efficiency, making it a common choice for legacy and mixed-signal digital designs.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The SN74ALS640BNE4 is a verified lead-free replacement variant offering identical electrical characteristics and pinout compatibility.