SN74HC645NS

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC645NS is an octal bus transceiver from the Texas Instruments HC logic series, housed in a 20-pin PDIP package for through-hole installation. It features non-inverting CMOS input and output levels with three-state outputs. The device operates within a supply voltage range of 2 V to 6 V and supports a working temperature range of -40 °C to +85 °C. Key electrical parameters include a maximum high-level output current of -7.8 mA and a maximum low-level output current of 7.8 mA. Propagation delay is specified at 135 ns under a 150 pF load at 2 V.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight bidirectional data channels per chip
• Three-state outputs enabling direct system bus connection without additional drivers
• CMOS input and output compatibility for standard logic interfacing
• Non-inverting signal polarity for straightforward data direction control

Buffers, Drivers, Receivers, Transceivers Applications

• High-performance microprocessor systems requiring wide data buses
• Memory mapping applications involving address and data latching
• Bidirectional data buffering between different logic families or subsystems
• Industrial control systems utilizing through-hole mounting requirements

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'N' confirms the PDIP-20 through-hole package variant distinct from surface-mount options like 'DWR'. Confirm RoHS compliance status via the manufacturer's official documentation prior to integration. Ensure the ordering part number matches the exact pinout and electrical specifications required for the target PCB layout. Cross-reference the datasheet revision date to guarantee alignment with current manufacturing standards.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal, non-inverting bus transceiver with three-state outputs is required for through-hole assembly. The HC series offers CMOS compatibility suitable for general-purpose digital logic applications operating between 2 V and 6 V. Consider the propagation delay characteristics relative to system clock speeds. Verify that the 20-pin DIP footprint aligns with existing board designs or prototyping needs.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74HC645 family of octal bus transceivers designed for Texas Instruments' high-speed CMOS logic portfolio. It serves as a bridge for bidirectional data transfer in complex digital circuits. The HC technology ensures low power consumption while maintaining noise immunity comparable to older LS series devices. This specific part represents the through-hole packaging option within the broader product line.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.