SN74LS640-1DW

$1.73

Description：IC TXRX INVERT 5.25V 20SOIC
Series：74LS
Mfr：Texas Instruments
Package：Bulk,Tube

SKU:3e5454c63597 Category: Buffers, Drivers, Receivers, Transceivers Brand: Texas Instruments

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Product introduction

SN74LS640-1DW is listed in the Buffers, Drivers, Receivers, Transceivers range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is IC TXRX INVERT 5.25V 20SOIC. Review the specifications below when checking this part for your BOM.

Buffers, Drivers, Receivers, Transceivers specifications for SN74LS640-1DW

Description：IC TXRX INVERT 5.25V 20SOIC
Series：74LS
Mfr：Texas Instruments
Package：Bulk,Tube
Logic Type：Transceiver, Inverting
Number of Elements：1
Number of Bits per Element：8
Input Type：-
Output Type：3-State
Current - Output High, Low：15mA, 48mA
Voltage - Supply：4.75V ~ 5.25V
Operating Temperature：0°C ~ 70°C (TA)
Mounting Type：Surface Mount
Package / Case：20-SOIC (0.295", 7.50mm Width)
Supplier Device Package：20-SOIC
Grade：-
Qualification：-

Buffers, Drivers, Receivers, Transceivers datasheet and documents for SN74LS640-1DW

SN74LS640-1DW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS640-1DW is an octal bus transceiver from the Texas Instruments SN54LS/74LS series. It features eight bidirectional data channels with inverting logic and three-state outputs, housed in a 20-pin SOIC (DW) package. The device operates within a supply voltage range of 4.75V to 5.25V and supports a commercial operating temperature range of 0°C to 70°C. Propagation delay specifications are documented as high-speed performance ranging from 10ns to 50ns.

Buffers, Drivers, Receivers, Transceivers Feature Summary

Provides eight bidirectional data channels for efficient bus communication
Features inverting logic functionality for signal direction control
Includes three-state outputs to facilitate direct system bus interconnection

Buffers, Drivers, Receivers, Transceivers Applications

Memory mapping controllers
Logic level conversion between TTL and CMOS systems
Bus-oriented communications architectures

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify component status carefully before procurement planning. Official documentation lists the SN74LS640-1DW as Obsolete Production. Confirm availability through authorized distributors or secondary markets, as standard production channels may not support this specific part number anymore.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component only if legacy compatibility with the SN54LS/74LS family is required. Evaluate alternative active versions such as the SN74LS640DWR or SN74HC640DWR for new designs requiring similar octal transceiver functionality with current manufacturing support.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN54LS/74LS64x family of octal bus transceivers. While the SN74LS640-1DW variant is marked obsolete, related parts like the SN74LS640DWR remain active. The family provides standardized interfaces for connecting microprocessors to memory and I/O devices via parallel buses.