AO4854

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AO4854 is a CMOS logic switch array that provides a series of digital logic switches. Operating with a single positive supply, the AO4854 can be used by engineers to easily control systems, digital circuits, and devices. This article will provide an overview of the AO4854 array, and will explain its application field and working principle.

What Is AO4854?

The AO4854 is Toshiba’s CMOS logic switch array. It comprises of sixteen CMOS analog switches, and is capable of switching TTL or CMOS levels. The device operates with a single positive supplier, and is housed in the SOIC package for convenient mounting. It has two independent power ground pins for controlling the switch transitions and logic level inputs. The array is designed for low power, low voltage and supports operation at ±4.5V.

Application Fields of AO4854

AO4854 is one of the most popular switch array ICs because of its versatility, and low power and voltage requirements. Here are some of the areas where it can be used:

1. Sensor System Interface: In automatic control systems, suitable sensor voltages need to be converted, amplified, and then transmitted to the controller. The AO4854 can interfere with the signal and prevent it from being affected by other signals, making sure that the controller is effectively informed.
2. Data Acquisition: Data acquisition systems require reliable analog signal switching and conversion. The AO4854 can be used as an interface module to convert signals from one form to another and achieve seamless signal switching.
3. Video Systems: AO4854 can be used for video systems that require multiplexing and demultiplexing. Due to the low supply voltage and low power requirements, the AO4854 can be used to switch video signals without any loss of signal quality.
4. Audio Systems: In audio systems, signal switching is also important. The low power requirements of AO4854 make it ideal for audio signal switching.

Working Principle of AO4854

The AO4854 can be used as a logic switch array. When a logic signal is present at one of the digital inputs, the corresponding switch turns ON. The switches remain ON until the logic signal is removed.

The AO4854 is a static array, meaning that when the digital inputs are in a static state, the switches do not turn ON or OFF. This makes it suitable for use in applications where a continuous signal needs to be provided.

The array also has a TTL-level drive capability. The outputs have a drive capability of 30mA, meaning that the outputs can provide enough power to drive LEDs, relays, and other loads. The inputs can also support TTL input voltage levels, giving the user more control and flexibility in the system.

The device also features Schmitt trigger input, which helps in reducing spurious switching. Due to the low power requirements, the device can be used in portable systems and can increase their battery life.

Conclusion

AO4854 is a versatile and low power logic switch array that can provide a series of digital logic switches. It operates with a single positive supply and is suitable for a variety of applications. The array has two independent power ground pins for controlling the switch transitions and logic level inputs. It also has a TTL-level drive capability, and its Schmitt trigger input helps in reducing spurious switching. AO4854 is cost-effective, and provides engineers with the convenience to easily control systems and digital circuits.

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