74LVT2245SJ

Overview

The Fairchild Semiconductor 74LVT2245SJ is a low voltage octal bidirectional transceiver featuring three-state outputs. It operates within a supply voltage range of 2.7V to 3.6V and supports 5V tolerant inputs, allowing direct interfacing with 5V systems. The device provides 24mA drive capability for both high and low output states. Packaged in a 20-lead Small Outline package (SOIC), it is designed for bus-oriented applications requiring efficient data direction control.

Feature Summary

• Octal bidirectional data transfer capability with independent direction control
• Five-volt tolerant inputs enabling safe interface with legacy 5V logic systems
• Three-state outputs that minimize bus contention during multi-driver operations

Applications

• Bus-oriented memory and disk drive controller architectures
• High-density data routing between microprocessors and peripheral devices
• Multi-drop communication lines requiring signal isolation

Procurement Notes

Verify the specific suffix designation against current manufacturer documentation, as obsolete status may affect availability. Confirm RoHS compliance requirements prior to procurement, as older production runs may not meet current environmental standards. Ensure the 20-SOP package dimensions match your PCB footprint specifications exactly to prevent assembly errors.

Selection Notes

Select this component when designing systems that require bidirectional data flow between 3.3V logic domains and 5V peripherals. The 5V tolerance feature eliminates the need for additional level-shifting circuitry on input lines. Consider the 24mA drive strength for moderate capacitive loads typical in board-level interconnects without requiring external buffering.

Part Context

This part belongs to the 74LVT logic family, characterized by low voltage operation and high-speed performance. It serves as a bridge between modern low-voltage processors and older 5V-compatible subsystems. The octal configuration allows handling of wide data buses efficiently within a single integrated circuit package.

Replacement Considerations

Check for 74LVT2245 variants with different suffixes such as SJX or MTDX for alternative packaging options like TSSOP. Verify pin compatibility before substituting with other octal transceivers from the same logic family to ensure functional equivalence.