MC100EP56DTG

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Logic - Signal Switches, Multiplexers, Decoders are an important family of integrated circuits (ICs) used in digital systems engineering. One such device is the MC100EP56DTG, an advanced differential CML (current mode logic) multiplexer/demultiplexer. Its application field and working principle are described in this article.

Application Field

The MC100EP56DTG is a signal multiplexer/demultiplexer that is suitable for signal routing in many digital designs. It can be used in applications requiring data transmission over high speed, long low-skew, and wide fan-out paths. Examples include switching of communication signals, clocks, and data rates of up to 10 Gb/s.

Additionally, owing to its low power consumption, exceptional thermal stability, and small size, the MC100EP56DTG is ideal for mobile, low-power, or handheld designs. It is an excellent choice for applications such as cellular base stations, laptops, PDA, video conferencing, HDTVs, satellite receivers, and more.

Working Principle

The MC100EP56DTG operates according to the principles of CML (current mode logic). CML is a type of logic that is based on the flow of current through transistor circuits. The chip comprises four input buffers and two multiplexers, with each multiplexer containing two input slots. Each input slot can be independently switched between two different logic inputs. The name CML is derived from these buffers, which are commonly referred to as current-mode latches.

The outputs of the two multiplexers are then multiplexed together, resulting in a single output. This output can be used to drive another CML device, or it can be used to directly control the gates of logic circuits. The output is capable of switching up to 2.5V with a power efficiency of 3mA/V, allowing for higher speeds and wider fan-out paths than traditional logic drivers.

In order to switch between inputs, the MC100EP56DTG utilizes several control signals – a common select signal and two independent select signals for each input slot. When the common select signal is high, the chip will switch the output between the two inputs of the multiplexer. When the two independent select signals are both low, the output will switch between the two inputs of the slot.

The MC100EP56DTG is also capable of operating in a differential mode, which means that the two inputs of each multiplexer can be connected to different logic levels, allowing for better noise immunity and improved signal integrity. Moreover, it is capable of operating in a 1x/2x operating mode, which enables it to produce either a single multiplexed output or a differential pair.

Overall, the MC100EP56DTG is an advanced differential CML multiplexer/demultiplexer, suitable for many digital designs requiring data transmission over high speed, long low-skew, and wide fan-out paths. Its low power consumption, exceptional thermal stability, and small size makes it ideal for mobile, low-power, or handheld designs.

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