SN74ALS640B-1N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS640B-1N is an octal bus transceiver from the Texas Instruments 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 supports TTL input and output levels, with a propagation delay of 11 ns. It provides a low-level output current of 24 mA and a high-level output current of -15 mA. The component functions reliably across an operating temperature range of 0°C to +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight bidirectional data paths for efficient bus interfacing
• Three-state outputs enable direct connection to system buses without additional drivers
• Compatible with TTL input and output voltage levels for standard logic integration

Buffers, Drivers, Receivers, Transceivers Applications

• Bidirectional data communication on microprocessor-based systems
• Memory and I/O mapping applications requiring bus isolation
• General-purpose digital signal routing in industrial control equipment

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'B-1' against the manufacturer's official datasheet to confirm pinout and electrical characteristics match project requirements. Ensure the PDIP-20 package type aligns with PCB layout constraints. Confirm RoHS compliance status if required by assembly standards. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring high-speed octal bus transfers with TTL compatibility. The ALS series offers improved speed over standard LS logic while maintaining similar power consumption profiles suitable for 5V systems. Consider the 11 ns propagation delay for timing analysis in synchronous circuits. Evaluate the 24 mA sink capability for driving moderate loads directly on the bus lines.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74ALS640 family of octal bus transceivers. It serves as a bidirectional interface between internal system buses and external peripherals. The ALS technology provides faster switching speeds compared to earlier generations, making it suitable for higher frequency digital applications within the 5V logic domain.

Buffers, Drivers, Receivers, Transceivers FAQ

What is the maximum supply voltage for the SN74ALS640B-1N?

The maximum operating supply voltage is 5.5 V.

Does this component support bidirectional data transfer?

Yes, it is an octal bus transceiver designed for bidirectional data communication.