CD74HCT245E

Overview

The CD74HCT245E is an octal bus transceiver with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and utilizes HCT logic technology, ensuring TTL-compatible inputs. The device features bidirectional data transmission controlled by a direction pin and an output enable pin. It is housed in a 20-pin DIP package and supports an operating temperature range from -55 °C to +125 °C.

Feature Summary

• Provides bidirectional eight-bit data transfer capability between two buses
• Features three-state outputs that isolate the device when disabled
• Ensures compatibility with standard TTL input logic levels

Applications

• Bidirectional data bus driving applications
• Memory interface circuits requiring level shifting
• General-purpose I/O expansion modules

Procurement Notes

Verify the specific suffix 'E' corresponds to the PDIP-20 package configuration. Confirm the manufacturer designation as Texas Instruments or its authorized subsidiary CD Technology. Ensure the component meets the specified industrial temperature range requirements for your application environment before finalizing procurement.

Selection Notes

Select this component when interfacing systems requiring HCT logic compatibility with robust drive capabilities. Consider the DIP-20 package for through-hole prototyping or legacy board designs. Evaluate the propagation delay characteristics against system timing constraints to ensure signal integrity across the eight-bit bus width.

Part Context

This part belongs to the CD74xx series of high-speed CMOS logic devices produced by Texas Instruments. It serves as a fundamental building block for digital systems requiring reliable data routing. The HCT variant specifically bridges the gap between older TTL standards and modern CMOS technologies.

Replacement Considerations

Compatible substitutes include SN74HCT245 variants with different packaging options such as DW or NS. Verify pinout compatibility and electrical specifications match exactly before substituting.