SN74LS645NSR

$2.01

Description：IC TXRX NON-INVERT 5.25V 20SO
Series：74LS
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT),Bulk

SKU:05d69b238e04 Category: Buffers, Drivers, Receivers, Transceivers Brand: Texas Instruments

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Product introduction

SN74LS645NSR is listed in the Buffers, Drivers, Receivers, Transceivers range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is IC TXRX NON-INVERT 5.25V 20SO. Review the specifications below when checking this part for your BOM.

Buffers, Drivers, Receivers, Transceivers specifications for SN74LS645NSR

Description：IC TXRX NON-INVERT 5.25V 20SO
Series：74LS
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT),Bulk
Logic Type：Transceiver, Non-Inverting
Number of Elements：1
Number of Bits per Element：8
Input Type：-
Output Type：3-State
Current - Output High, Low：15mA, 24mA
Voltage - Supply：4.75V ~ 5.25V
Operating Temperature：0°C ~ 70°C (TA)
Mounting Type：Surface Mount
Package / Case：20-SOIC (0.209", 5.30mm Width)
Supplier Device Package：20-SO
Grade：-
Qualification：-

Buffers, Drivers, Receivers, Transceivers datasheet and documents for SN74LS645NSR

SN74LS645NSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS645NSR is an octal bus transceiver manufactured by Texas Instruments, belonging to the 74LS logic series. It features non-inverting data transmission with three-state outputs and operates within a supply voltage range of 4.75V to 5.25V. The device provides high-level output current of 15mA and low-level output current of 24mA. It is housed in a 20-pin Small Outline Package (SOP) designed for surface-mount installation. The component supports an operating temperature range from 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

Octal bus transceiver architecture supporting bidirectional data flow
Three-state outputs enabling direct connection to system buses
Non-inverting signal transmission functionality

Buffers, Drivers, Receivers, Transceivers Applications

Memory module data bus interfacing
Microprocessor-based system data routing
Control signal distribution across circuit boards

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's package option addendum to confirm the exact physical package type and reel specifications. Ensure the selected variant matches the required moisture sensitivity level and lead finish for the intended assembly process. Cross-reference the RoHS status and material type before finalizing procurement orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring non-inverting octal data transfer with three-state isolation capabilities. Verify that the 74LS logic family characteristics align with the target system's power consumption and speed requirements. Confirm that the SOP-20 footprint accommodates the available board space and thermal management constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN54LS640 through SN54LS645 family of octal bus transceivers. While the SN74LS640 is an inverting version, the SN74LS645 specifically provides non-inverting operation. Both variants share similar packaging options and electrical characteristics but differ in signal polarity. The NSR suffix indicates a tape-and-reel packaging format suitable for automated surface-mount assembly.