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Interface - Analog Switches, Multiplexers, Demultiplexers

Analog switches are mainly used for signal switching between two transmission paths, as well as for various measuring, recording and control systems, and also for switching large current signals. Multiplexers are mainly used for multiple signal switching, testing, installation and debugging of electric devices. Demultiplexers are mainly used for multiple output signals, decoding and test system. All of them can be realized by using the MAX4521EEE.

What is MAX4521EEE

The MAX4521EEE is a high performance, low power CMOS integrated circuit for analog switches, multiplexers, and demultiplexers. It is an ideal device for applications such as audio water mark programming, wireless LAN, 3G/4G mobile phones, and so on. It provides an integrated dual-path analog switch array with two single-pole four-throw (SP4T) ultra-low on-resistance switches, sharing the same common paths and two serial-to-parallel (S-P) multiplexers for controlling the switches. To conserve power, the MAX4521EEE provides various power-down modes, where the system can use time-based power-down without external circuit components.

MAX4521EEE Application Field

The MAX4521EEE is used in a wide range of applications, including but not limited to, 3G/4G mobile devices, digital video and camera equipment, audio water mark programming, wireless LAN devices, and digital TV receivers. In addition, it is suitable for programs related to multiplexing and sampling digital signals as well as application-oriented circuits.

MAX4521EEE Working Principle

The MAX4521EEE is consist of two SP4T switches and two serial-to-parallel (S-P) multiplexers, sharing the same common signals for low power dissipation. The MAX 4521EEE switches can be switched by two independent control signals. The two control signals are respectively used for two SP4T switch circuits. The two switch circuits, sharing the same common signals, can be connected to two independent output signals.

The S-P multiplexers of MAX4521EEE are controlled by five control signals, and each S-P multiplexer has eight input channels which are multiplexed to one single output, and 16 serial asynchronous data can be received. The chip also provides an enable control signal, which is used to enable or disable the chip without disturbing the state of the chip.

In addition, the MAX4521EEE integrates a power down circuit which makes it possible to switch between powered or power-down state without external circuit. This allows the user to save power when necessary. Also, the chip provides some protection features, such as over-voltage protection and ESD immunity, which ensure the stable and reliable performance of the chip.

Conclusion

The MAX4521EEE is a low power, high performance integrated circuit for analog switches, multiplexers, and demultiplexers. It provides two single-pole four-throw (SP4T) switches, two serial-to-parallel (S-P) multiplexers, and various protection features to provide reliable and stable performance. Its low power consumption makes it suitable for various application-oriented circuits, especially for 3G/4G mobile devices, audio water mark programming, and wireless LAN devices.

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