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Difference between LVDS and TTL

Difference between LVDS and TTL

Looking to start a new project that involves interfacing with a digital device? If so, you’ll need to decide what level of voltage signaling to use. LVDS and TTL are both common standards, but they differ in some key ways. In this blog post, we’ll take a closer look at the differences between LVDS and TTL and help you decide which is right for your needs.

What is LVDS?

LVDS is an acronym for Low Voltage Differential Signaling. LVDS is a type of signaling used to transfer data between two devices. LVDS uses two wires to transmit data, one wire for the positive voltage and one wire for the negative voltage.

LVDS can transmit data at speeds of up to 800Mbps. LVDS is used in a variety of applications, including flat panel displays, digital cameras, and storage area networks. LVDS is also used in high-speed computer buses, such as PCI Express and Thunderbolt.

What is TTL?

TTL (transistor-transistor logic) digital signaling technology is a type of electronic circuitry that uses transistors to represent digital signals. TTL is the most common type of digital signaling technology used in computers and other electronic devices.

  • TTL signals are typically used to represent logical values, such as “0” for low voltage or “1” for high voltage. TTL circuitry is often used to interface between digital devices and other electronic circuits, such as Analog-to-Digital Converters (ADCs) or Digital-to-Analog Converters (DACs).
  • TTL signals can also be used to control the flow of current in an electrical circuit. TTL digital circuitry is usually designed using standard TTL logic gates, which are available from many different manufacturers.
  • TTL logic gates can be cascaded to create more complex TTL circuits. TTL digital signaling technology is also sometimes referred to as “Status Bit Acknowledged Logic” or “SAL”.

Difference between LVDS and TTL

LVDS and TTL are two types of digital signaling technologies that are commonly used in electronic devices. LVDS is a type of differential signaling that uses low voltage levels to transmit data.

  • TTL, on the other hand, uses transistor-transistor logic to create square waves with high voltage levels. LVDS is typically used for long-distance signal transmission, while TTL is often used for shorter distances.
  • LVDS offers several advantages over TTL, including higher data rates and lower power consumption. However, LVDS is also more susceptible to noise and requires specially designed drivers and receivers.
  • As a result, LVDS is not always the best choice for every application. When choosing between LVDS and TTL, it is important to consider the specific needs of the system.


In conclusion, LVDS offers several advantages over TTL including higher data rates, lower power consumption, and smaller form factors. Although TTL is still widely used in many applications, LVDS is quickly becoming the standard for high-speed communications. If you are looking to implement a high-speed communication system, it is important to understand the difference between LVDS and TTL.

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