MC74HCT245ADTG

Overview

The MC74HCT245ADTG is an octal bus transceiver manufactured by onsemi, belonging to the HCT logic series. It features a TSSOP-20 surface-mount package and provides bidirectional data transmission with three-state outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input levels while driving CMOS output loads. It includes direction control and an output enable function for efficient bus management in digital systems.

Feature Summary

• Octal configuration providing eight independent bidirectional data channels for parallel bus interfacing
• Three-state outputs allowing multiple transceivers to share a common data bus without interference
• HCT logic compatibility enabling direct interface between TTL-driven inputs and CMOS-driven loads

Applications

• Bidirectional data bus architectures requiring level shifting between different logic families
• Memory modules and storage devices utilizing parallel data transfer interfaces
• Industrial control systems managing communication between microcontrollers and peripheral I/O ports

Procurement Notes

Verify the specific suffix ADTG against the manufacturer's official datasheet to confirm the TSSOP-20 package variant. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the part number with authorized distributors to confirm current availability and authenticity before procurement.

Selection Notes

Select this component when an octal transceiver with HCT-compatible inputs is required for 5V logic systems. It is suitable for applications needing bidirectional flow control via dedicated direction pins. Consider the TSSOP-20 footprint constraints and thermal dissipation capabilities during PCB layout design.

Part Context

This part belongs to the widely used 74HCT245 family of bus transceivers. It serves as a standard interface solution for connecting 8-bit data buses in embedded systems. The HCT series ensures robust performance in mixed-voltage environments, bridging legacy TTL standards with modern CMOS technologies.

Replacement Considerations

Compatible substitutes include the MM74HCT245MTC from onsemi and the SN74HCT245 from Texas Instruments. Verify pinout compatibility and electrical specifications such as propagation delay and drive current before substituting.