SN74HC640DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC640DWR is an octal bus transceiver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and supports a recommended operating temperature from -40°C to +85°C. The device features low power consumption with a maximum ICC of 80µA at 6V. Propagation delay (tpd) ranges from 18ns to 27ns at VCC=6V with CL=50pF, and up to 49ns at CL=150pF. Output drive capability reaches ±7.8mA at 6V.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceiver architecture with 3-state outputs for asynchronous two-way communication between data buses
• Direction control via DIR pin allows bidirectional data transmission between A and B buses
• Output enable (OE) input provides isolation capability to effectively disconnect buses when disabled
• Inverting logic design compatible with CMOS input and output levels

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Memory and memory interface applications
• Driving bus lines requiring high-current 3-state outputs

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'DWR' corresponds to the SOIC-20 package and tape-and-reel carrier configuration. Confirm RoHS compliance status and lead finish details against the latest TI Package Option Addendum. Ensure the procurement source provides valid traceability documentation for production-grade components.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring octal bidirectional data transfer with inverting logic. Verify that the required propagation delay meets system timing constraints under the specific load capacitance conditions. Ensure the operating environment falls within the specified -40°C to +85°C temperature range for the SN74HC variant.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4HC640 family of octal bus transceivers. It shares functional characteristics with other variants in the series, differing primarily in package type, thermal performance, and manufacturing status. The 'SN74' prefix indicates commercial grade operation, while 'HC' denotes High-speed CMOS technology.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include SN74HC640DW (SOIC tube), SN74HC640NSR (SOP tape), and SN74HC640PWR (TSSOP tape). Cross-reference package dimensions and moisture sensitivity levels before substitution.