SN74ALS640BN

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS640BN 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 provides a propagation delay of 11 ns, with low-level output current capability of 24 mA and high-level output current of -15 mA. Designed for through-hole mounting, it supports TTL input and output levels across an operating temperature range of 0°C to +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight bidirectional data channels for efficient bus management
• Three-state outputs enable direct connection to system buses without additional drivers
• Inverting polarity allows flexible signal routing and logical inversion capabilities

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data acquisition systems requiring isolated bus interfaces
• Memory mapping circuits utilizing parallel data transfer architectures
• Industrial control systems managing multiple peripheral devices via shared data lines

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'BN' confirms the PDIP-20 through-hole package variant. Ensure compatibility with existing PCB footprints designed for standard dual-in-line configurations. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and traceability before procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring high-speed octal data transfer with minimal propagation delay. The ALS series offers superior speed-power product compared to standard LS logic. Verify that the required input/output voltage levels align with the specified TTL compatibility. Consider the thermal dissipation requirements associated with the specified output current capabilities during continuous operation.

Buffers, Drivers, Receivers, Transceivers Part Context

This component belongs to the SN74ALS640B series, representing Texas Instruments' Advanced Low-Power Schottky logic family. It serves as a foundational building block for digital logic designs requiring robust bus interfacing. The device complements other ALS series components by providing standardized octal buffering and direction control functionality within industrial and commercial electronic applications.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS640BDWR: Surface-mount SOIC alternative with identical electrical characteristics. SN74ALS640BNE4: Lead-free DIP variant ensuring environmental compliance while maintaining functional equivalence.