DG401CJ

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The DG401CJ is an 8-channel, quad-channel monolithic analog multiplexer/demultiplexer with low on-resistances and low power consumption. It has two operational modes: the multiplexer mode and the demultiplexer mode. DG401CJ is ideal for applications where a multiplexer can be used to reduce the number of connection points between two circuits or to switch between multiple sources on the same output line. The device is also suitable for applications where a demultiplexer can be used to switch an input signal to multiple outputs.

The DG401CJ is designed to offer low total on-resistance, noise, and cross-channel leakage, as well as high input and output isolation, making it ideal for applications where signal integrity is key. The device also has low power consumption, making it suitable for low power applications and battery-powered devices. The device is also available in a variety of packages, making it suitable for a variety of designs.

The design of DG401CJ is based on the concepts of MOSFET switching and TTL interface. By applying a TTL signal to the control logic inputs (S1-S4), a signal from one of eight data ports (IN/OUT1-8) can be applied to the output port (OUT). The device features two select pins, which can be used to control the multiplexer/demultiplexer switching, and an enable pin, which can be used to enable and disable the device. The device can operate in either multiplexer mode (CMOS/TTL to TTL) or demultiplexer mode (TTL to CMOS/TTL).

DG401CJ is designed to offer a wide range of applications. It can be used to reduce the number of connection points between two circuits or to switch between multiple sources on the same output line. It can also be used in power supply and sensor sensing applications, where the multiplexer can be used to switch between multiple sources and the demultiplexer can be used to switch an input signal to multiple outputs. Additionally, the device can also be used in 10/100M Ethernet applications, where a multiplexer can be used to switch between two Ethernet ports and a demultiplexer can be used to switch an incoming signal to multiple output ports.

The working principle of the DG401CJ utilizes MOSFETs and TTL signals. The device is designed with a pre-charge circuit, which pre-charges the output nodes to the transport level before the actual transfer. The presetting of the pre-charge circuit is dependent on the DPDT drives of the MOSFETs, which is set for a total on-resistance of 2-3 ohms. The control logic gates are then used to control the switching of the multiplexer/demultiplexer. When the appropriate control logic is applied, the data port signals are then switched to the output port(s) and the output nodes are discharged or pre-charged to the transport level, depending on the multiplexer/demultiplexer mode.

In summary, the DG401CJ is a 8-channel, quad-channel monolithic analog multiplexer/demultiplexer that is designed to provide low total on-resistance, noise, and cross-channel leakage, high input and output isolation, and low power consumption. This makes the device ideal for applications where low on-resistance, signal integrity, and power consumption are important. Additionally, the device is suitable for a variety of applications, such as reducing the number of connection points between two circuits, switching between multiple sources on the same output line, power supply and sensor sensing applications, and 10/100M Ethernet applications. The working principle of the device utilizes MOSFETs and TTL signals, with a pre-charge circuit set to a total on-resistance of 2-3 ohms.

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