NLSV4T244DTR2G

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The NLSV4T244DTR2G is a universal logic-level shifter for miniaturization and flexibility, featured as small footprint and easy to use. It is available in both through-hole and surface-mount packages, applicable for low voltage applications such as portable equipment and automotive. This logic-level translator meets the needs of compatibility among different standards, especially suitable to provide translation between the TTL and LVCMOS Device and Voltage applications.

Introduction

Logic translators, such as NLSV4T244DTR2G, are popularly used when signals need to be transferred between components using different logic levels. For example, a 3V-I/O device may need to communicate with a 5V-I/O device. A translator can convert the signals from 3V to 5V or vice versa, allowing the two components to interface. Logic-level shifting is necessary for a wide range of devices for "compatibility" between different logic device families.

Application

The NLSV4T244DTR2G is a bi-directional logic translator, providing an interface between circuits operating at different supply voltages from 1.8V to 5.5V. It offers an excellent signal integrity on both sides, with guaranteed voltage level accuracy and glitch-free performance. A separate enable on each side allows half of the device to be disabled while the condition in the other half remains intact. The typical applications of NLSV4T244DTR2G include:

• Switching between logic families, such as TTL and LVCMOS
• Interfacing between batches of 3V and 5V device
• USB port protection
• Isolating noisy signals
• Automotive applications
• Portable electronic equipment

Working Principle

NLSV4T244DTR2G consists of two separate control & latch circuits, each controlling four bidirectional channels. It is able to interface signals between devices of different supply voltages by using two enable pins to control the power supply, one for each side. The two enable pins: EN A and EN B, are also internally connected, when these EN pins are HIGH, both sides of the device are activated. When the EN pins are LOW, both sides are disabled.

This translator features three POWER/GND pins for each side to reduce noise coupling between the supply lines and the signals being translated. Each side must have the voltage applied between VCC and GND pins. All channels can work in either direction, with the data being shifted from one side to the other when EN pins are high. When the EN pins are low, the output level is buoyant, and no current is flowing through the pins.

Conclusion

The NLSV4T244DTR2G universal logic-level shifter is a versatile and convenient device for level shifting between different voltage families, such as 3V & 5V/LVCMOS and High Speed CMOS devices. It is an ideal choice for applications such as portable electronic equipment, USB port protection, automotive, and various other low voltage applications. The logic-level translator makes it possible to communication between components without worrying about the logic level incompatibility.

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