CD40109BPWRG4

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CD40109BPWRG4, otherwise known as the CMOS 8-Channel Multiplexer/Demultiplexer is a device designed for applications that require low power consumption, especially dynamic random access memory (DRAM). This device belongs to the Logic - Translators, Level Shifters category as it is capable of providing translations between logic levels and/or different power levels. It transmits digital logic signals between two different power supplies, down conversion and level shifting channels between high and low logic levels.

The device is built using the Complementary Metal-Oxide-Semiconductor (CMOS) technology and is constructed with two select gates corresponding to each data output or data input. The two select gates are connected to the multiplexer/demultiplexer’s address inputs, while the data input/data output connections are connected to the data bus. The addresses used to select the data track are fed into the address inputs, which selects the appropriate line for data input/output. Once the select gate with the corresponding address is triggered, the line is either used for data input or data output.

In terms of pin configuration—including input pins, output pins and the power pins—the device comprises eight data pins, which are DB0-DB7 for both data input and data output, select pins (S0-S3), enable pins (EN), and Vcc and GND pins.

Similar to other digital devices, power supply requirements for the device depends on the application, with a supply voltage of 3.0V to 5.5V recommended. The operating temperature requirements of the device varies from -40°C to +85°C, while input and output voltage ratings of the device ranges from -0.5V to Vcc+0.5V.

The device toggles between two logic levels, and also enables level-shifting and translation between logic levels, with logic “0” and logic “1” representing the two logic levels. The device offers a wide range of applications such as power supply voltage level conversion, level shifting between low and high logic levels, DRAMs, implementing counters, encoding and decoding circuits.

CD40109BPWRG4 is used in logical devices such as multiplexers that require low power supply, and devices that require level-shifting and/or logic-level translation. The device is used when logic devices are connected to digital subsystems that use different logic family and operating voltage levels, such as buffers, latches, registers. As the device offers no precise value for the OFF-inhibit delay, it is not suitable for implementation in cascaded circuits that require precise control of the OFF-inhibit pulse spacing.

In summary, the CD40109BPWRG4 is a low-power CMOS 8-Channel Multiplexer/Demultiplexer that belongs to the Logic - Translators, Level Shifters category. The device is integrated with two select gates corresponding to each data input/output and is mainly used for applications that require low power consumption, such as DRAMs, level-shifting, voltage level conversion and logic-level translation. It is not suitable for device implementations that require precise control of the OFF-inhibit pulse spacing.

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