74LVT2245WM

Overview

The onsemi 74LVT2245WM is a low-voltage octal bidirectional transceiver featuring 3-STATE inputs and outputs. It operates within a supply voltage range of 2.7V to 3.6V, with input voltages supporting up to 5.5V for TTL interface compatibility. The device provides non-inverting data flow controlled by Transmit/Receive (T/R) and Output Enable (OE) signals. B Port outputs include equivalent 25Ω series resistors to reduce overshoot and undershoot. A Port outputs source/sink -32mA/+64mA, while B Port outputs source/sink -12mA/+12mA.

Feature Summary

• Bidirectional data transfer capability between two buses controlled by direction and enable inputs
• Integrated 25Ω series resistance in B Port outputs to minimize signal ringing
• Power-up/down high impedance state prevents glitching during bus initialization
• Bushold feature eliminates the need for external pull-up resistors on unused inputs

Applications

• Bus-oriented applications requiring asynchronous 2-way data communication
• Systems interfacing low-voltage logic with 5V environments
• Live insertion/extraction scenarios requiring glitch-free bus loading
• High-speed data transmission where output overshoot reduction is critical

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package type matches the 20-Lead SOIC specification. Check datasheet revision history for any updates to electrical characteristics or ordering information. Ensure compliance with RoHS standards if required by project specifications. Validate that the specific lot meets storage temperature requirements prior to assembly.

Selection Notes

Select this component when bidirectional data transfer between 3.3V and 5V domains is required. Consider the 25Ω series resistor feature for applications sensitive to signal integrity issues like overshoot. Evaluate current drive requirements; A Ports offer higher drive strength than B Ports. Verify bushold functionality needs, as standard LVT versions lack this feature compared to LVTH variants. Ensure operating temperature range aligns with system environmental conditions.

Part Context

This device belongs to the LVT logic family, designed for low-voltage applications while maintaining compatibility with 5V systems. It utilizes advanced BiCMOS technology to achieve high-speed operation similar to 5V ABT devices but with lower power dissipation. The octal configuration allows for efficient handling of wide data buses in compact packages.

Replacement Considerations

Public confirmed substitute part numbers: 74LVTH2245WM.