Fairchild AN-5001J LVX Series Dual Power Supply Level Translator Application Note

About this manual

This document describes the Fairchild Semiconductor LVX series of dual power supply CMOS level translators. These devices facilitate direct interfacing between 3V and 5V CMOS logic levels, which is difficult with standard 5V CMOS devices due to voltage threshold differences. The note covers two main device types: those with fixed voltages on both ports (74LVX3245/74LVX4245) and those with a variable B-port for interfacing with PCMCIA cards (74LVXC3245/74LVXC4245). This manual is written in Japanese.

What's inside

• Device Types
• Fixed Voltage Devices
• Variable Voltage Devices
• Power Up Sequence
• Floating Inputs

Frequently asked questions

What voltage range is supported for the 3V side of the 74LVX3245?

The 3V side supports a voltage range of 2.7-3.6V.

How should the OE terminal be set to float the B port on 74LVXC devices?

Set the OE terminal to 'H' to float the B port.

What happens if terminals are left floating on 74LVX3245 or 74LVX4245?

Leakage increases, output oscillates, and reliability decreases.