CD74HCT245EE4

Overview

The CD74HCT245EE4 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 supports an operating temperature range from -55°C to 125°C. The device features buffered inputs, balanced propagation delay, and high drive current outputs capable of driving 15 LSTTL loads. Typical propagation delay is 9 ns at VCC = 5V, CL = 15pF, TA = 25°C. It provides direct LSTTL input logic compatibility with VIL max 0.8 V and VIH min 2 V.

Feature Summary

• Octal bidirectional data transmission controlled by direction (DIR) and output enable (OE) pins
• Three-state outputs providing isolation when OE is high
• Direct LSTTL input logic compatibility for CMOS-to-LSTTL interfacing
• High drive current outputs enabling operation with large bus capacitances

Applications

• Two-way asynchronous communication between data buses
• Bus line driving capability in digital systems
• Interfacing CMOS logic circuits with LSTTL loads

Procurement Notes

Verify the specific ordering suffix EE4 corresponds to the PDIP-20 tube package configuration as listed in the manufacturer's orderable addendum. Confirm RoHS compliance status and lead finish specifications match project requirements. Ensure the component status is active production before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring octal bus transceivers with HCT logic levels. It is suitable for applications needing direct LSTTL compatibility and wide industrial temperature ranges. Consider the PDIP-20 package constraints for through-hole mounting designs.

Part Context

This part belongs to the CDx4HC(T)245 family of high-speed CMOS logic octal-bus transceivers. The 'HCT' designation indicates High-Speed CMOS Technology compatible with LSTTL logic levels. The 'E4' suffix typically denotes environmental compliance or specific manufacturing lot attributes defined by Texas Instruments.

Replacement Considerations

CD74HCT245E is the standard catalog equivalent without the E4 suffix. CD74HC245EE4 offers HC logic levels instead of HCT. CD54HCT245F is the military-grade version in a CDIP package.