IDT74LVC245ASOG8

Overview

The IDT74LVC245ASOG8 is a 3.3V CMOS octal bus transceiver with 3-state outputs and 5-volt tolerant I/O, manufactured by Renesas Electronics Corporation under the IDT brand. It operates within an industrial temperature range of -40°C to +85°C and utilizes 0.5 micron CMOS technology. The device features ±24mA high output drivers and supports hot insertion. Electrical characteristics include propagation delays ranging from 1.5ns to 7.3ns depending on voltage and direction, with quiescent power supply currents typically at 10µA.

Feature Summary

• Provides bidirectional data transfer between two buses using DIR and OE control pins.
• Features 5-volt tolerant inputs and outputs for compatibility in mixed 3.3V/5V systems.
• Includes input hysteresis to improve noise margins and signal integrity.

Applications

• Mixed voltage systems combining 5V and 3.3V logic levels
• Data communication equipment
• Telecommunication systems

Procurement Notes

Verify that the specific suffix 'SOG8' corresponds to the Shrink Small Outline Package (SSOP) variant with Green molding compound and the specified industrial temperature range. Confirm package pinout alignment with standard 20-pin SSOP layouts before integration into existing PCB footprints.

Selection Notes

Select this component when asynchronous communication between two busses requires 8-bit wide data paths. It is suitable for applications needing moderate to heavy load driving capabilities while maintaining low static power consumption. Ensure system voltage requirements align with the 2.7V to 3.6V operating range.

Part Context

This part belongs to the IDT74LVC245A series of octal bus transceivers. It shares functional similarities with other LVC family members but is specifically optimized for 3.3V operation with 5V tolerance. The 'ASOG8' designation identifies the specific package type and manufacturing lot configuration within the broader product line.

Replacement Considerations

Compatible substitutes include SN74LVC245 and HD74HC245T-EL. Verify pin compatibility and electrical specifications such as propagation delay and drive current when replacing the original component.

FAQ

What is the function of the DIR pin?

The DIR pin controls the direction of data flow. When DIR is high, data flows from Bus A to Bus B; when low, it flows from Bus B to Bus A.

How does the device handle hot insertion?

The device supports hot insertion, allowing it to be safely connected or disconnected from a live system without causing damage or signal corruption.