SN74ABTH245DW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ABTH245DW is an octal bus transceiver utilizing state-of-the-art EPIC-IIB BiCMOS design, manufactured by Texas Instruments. It features 3-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device supports asynchronous communication between data buses with propagation delays ranging from 0.8 ns to 3.9 ns at VCC = 5 V. It provides high-drive outputs capable of -32 mA IOH and 64 mA IOL. The component is housed in a 20-pin Plastic Small-Outline (DW) package and is characterized for operation over the temperature range of -40°C to 85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports hot-insertion applications through Ioff and power-up 3-state circuitry that prevents damaging current backflow and driver conflicts during power transitions.
• Incorporates active bus-hold circuitry on data inputs to maintain valid logic levels without requiring external pullup or pulldown resistors.
• Delivers high-drive output capabilities designed to manage significant load currents while maintaining signal integrity across the bus.

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous communication between data buses
• Hot-insertion applications requiring isolation during power cycles
• High-drive bus driving scenarios

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's Package Option Addendum to confirm the exact packaging configuration, such as tube quantities for the DW package. Ensure the RoHS compliance status and lead finish match the project requirements. Confirm the operating temperature range aligns with the system environment specifications before finalizing procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when high-speed data transfer is required alongside robust drive strength for long bus lines. The inclusion of bus-hold functionality simplifies board layout by eliminating external resistor networks. Consider the EPIC-IIB BiCMOS technology benefits regarding reduced power dissipation compared to standard CMOS alternatives for similar performance levels.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74ABTH245 family of octal bus transceivers. It shares functional similarities with other members like the SN74ABT245 but utilizes advanced BiCMOS technology for improved performance metrics. The DW package variant specifically denotes the Plastic Small-Outline form factor suitable for surface-mount assembly techniques.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ABTH245DWE4

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle power-down states?

The device enters a high-impedance state when VCC is between 0 and 2.1 V. The Ioff circuitry disables outputs to prevent backflow, and power-up 3-state circuitry ensures outputs remain high-impedance during power transitions.

What is the function of the OE input?

The output-enable (OE) input controls the state of the outputs. When OE is high, the device is disabled, effectively isolating the A and B buses regardless of the direction-control (DIR) input level.