SN74LV4052ADRE4

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The SN74LV4052ADRE4 (hereafter referred to as the 4052) is an integrated circuit that can be used in a variety of analog switching, multiplexing and demultiplexing applications. It is an adept and versatile digital-to-analog (D/A) switch, platformed upon a low-voltage, low-power design that operates from a single power supply.

The 4052 is an integrated circuit comprised of two 4-channel, analog switch multiplexer/demultiplexers (or “MUXs” for short). MUXs are three-state, single-pole, double-throw (SPDT) devices with their outputs either high-Z or one of two binary states.

Analog switches, as found in the 4052, are used to route and combine voltage signals. They are applied to electronic circuits by allowing the user to control the switching of analog circuits, such as audio or video signals, or even a combination of both. In order to guarantee reliable operation, it is important that the analog switch has low “on” resistance and low “off” leakage.

The power of the 4052 lies in its ability to replicate the capabilities of standard mechanical switches, but with the added bonus of being ultra-low-power and non-mechanical. Data, including digital and analog, can be transferred rapidly and reliably in harsh environments or even in space, as the 4052’s hermetically sealed ceramic body is engineered to be able to fight against temperatures and radiation. This makes it a superior choice as a switch for military and space applications, as well as automotive, medical and industrial systems.

The logic block of the 4052 is made up of three input control signals: the multiplexer enable input (Gn), the multiplexer select inputs (A, B), and the demultiplexer enable input(En). By connecting an appropriate voltage to the appropriate input enable pin, the user can precisely control which of the (eight) input pins the analog signal is transferred from.

The G inputs of the 4002 can be seen as the “master” control. When a suitable voltage is applied to the Gn pins, the analog switch multiplexers and demultiplexers are enabled. Two analog signals can be combined into one using the multiplexers, with two demultiplexers to separate two channels back into two signals. The operation of both multiplexers and demultiplexers are governed by the logic of the A and B inputs.

For example, the A=0, B=1 will multiplex the first analog signal source (channel A1) to the output, while the A=1, B=0 will multiplex the second analog signal source (channel A2) to the outputs. Inversely, the A=0, B=1 demultiplexes the analog signal input (channel Z) to the first output (channel Y1) while the A=1, B=0 demultiplexes the analog signal input to the second output (channel Y2).

In this way, the 4052’s MUXs and DEMUXs are optimally used for 50–75 ohm system switches, unity gain buffers, and other assorted audio and video switching needs. Any of these switching requirements can be performed using the Sn74LV4052ADRE4.

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