SN74ALS640B-1NSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS640B-1NSR is an octal bus transceiver from the Texas Instruments SNx4ALS640(B) family, designed for high-speed data transfer in digital systems. It features a 20-SOIC surface-mount package and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides three-state outputs with a propagation delay of 11 ns, supporting TTL input and output levels. It delivers a low-level output current of 24 mA and a high-level output current of -15 mA, ensuring robust signal driving capabilities across its eight channels.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight independent bidirectional data paths for efficient system interconnects
• Three-state outputs enable direct connection to system buses without additional buffering hardware
• Inverting logic design facilitates flexible signal routing and polarity management in circuit architectures

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data transmission between microprocessors and memory modules
• Buffering and redistribution of signals on parallel computer buses
• I/O port expansion in embedded control systems requiring isolated data pathways

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix '1' against the manufacturer's official datasheet to confirm functional variations or pinout differences compared to standard variants. Ensure the SOIC-20 package dimensions match your PCB footprint requirements. Confirm RoHS compliance status through the latest product information sheet before finalizing procurement specifications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring fast octal data transfer with defined inversion characteristics. The ALS logic family offers a balance of speed and power consumption suitable for general-purpose digital applications. Verify that the operating temperature range of 0°C to 70°C aligns with your environmental constraints and that the 5V supply voltage matches your system architecture.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4ALS640(B) series of octal bus transceivers manufactured by Texas Instruments. The series is characterized by advanced low-power Schottky (ALS) technology, providing improved performance over earlier logic families while maintaining compatibility with standard TTL interfaces. The device serves as a critical interface element in digital logic designs requiring reliable bidirectional data flow.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS640BNE4 is a documented equivalent variant offering identical electrical functionality in a DIP-20 package. SN74ALS640B-1NSRG4 represents a lead-free version of the same SOIC-20 component. Verify package compatibility and soldering profiles when substituting these alternatives.