74LVT2245WMX

Overview

The onsemi 74LVT2245WMX is an octal bidirectional transceiver featuring 3-STATE outputs and integrated 25 Ω series resistors in the B Port. It operates within a supply voltage range of 2.7 V to 3.6 V, supporting TTL interface capability to 5V systems. The device provides output drive capabilities of -12 mA/+12 mA on the B Port and -32 mA/+64 mA on the A Port. Propagation delays are characterized at 4.4 ns maximum for data to B Port and 3.6 ns maximum for data to A Port at 3.3 V.

Feature Summary

• Integrated 25 Ω series resistors in B Port outputs reduce overshoot and undershoot
• Bidirectional data flow controlled by Transmit/Receive input
• Power-up/down high impedance prevents glitch-free bus loading
• Bushold inputs eliminate need for external pull-up resistors

Applications

• Bus-oriented applications requiring bidirectional data transfer
• TTL to 5V environment interface
• Live insertion and extraction permitted systems

Procurement Notes

Verify the specific ordering suffix 'X' indicates tape and reel packaging as documented in the datasheet. Confirm package type matches the 20-Lead Small Outline Integrated Circuit (SOIC) specifications. Ensure compatibility with recommended operating conditions including supply voltage and temperature ranges before procurement.

Selection Notes

Select this component for low voltage 3.3V applications requiring robust 5V tolerance. Consider the integrated series resistors for signal integrity improvements. Evaluate the bushold feature availability if unused inputs require holding without external components. Verify BiCMOS technology suitability for required speed and power dissipation levels.

Part Context

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

Replacement Considerations

Check for equivalent parts from other manufacturers offering similar octal bidirectional transceiver functionality with 3-STATE outputs. Verify pinout compatibility and electrical characteristics such as propagation delay and output drive current. Ensure any replacement supports the required 25 Ω series resistor integration or provides alternative signal integrity solutions.