CD4043BNSRE4

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The CD4043BNSRE4 is a logic latch component in the 4000B series of CMOS logic chips from Texas Instruments. It is designed to provide latching (holding) of a logic signal once it has been applied. The component features four independently operated NAND gates along with eight inverters. It is a 14-pin PDIP (plastic dual-in-line package) component that features several features to support its application field, such as low power consumption, balanced propagation delays, and low cross-talk between channels.

The principle application field of the CD4043BNSRE4 is in controlling and monitoring logic signals in digital systems. It is widely used in digital logic designs such as microcontrollers and memory circuits. Its latching function is useful in many applications, such as in transferring data between two components on a circuit board, automatically repeating a critical operation, and providing feedback in feedback controllers.

The CD4043BNSRE4 has two operating modes: latched and unlatched. In latched mode, the component is held in a constantly ON state and provides a steady output signal until the input signal is removed or the component is cycled into the unlatched state. Once the component is in unlatched mode, it will only react to input signals.

The CD4043BNSRE4\'s internal circuitry can be described as having a NAND gate suitable for latching the output of logic circuits and inverters suitable for providing the logic level inversion necessary for the circuit to function. The NAND gate consists of four exclusive-OR gates arranged as two independent pairs. The inputs of each pair are tied together and the outputs are tied together, forming a single NAND gate. The output of the NAND gate is applied to the first inverter, which then drives the output line.

The NAND gate is used to latch the output. The inputs of each pair are tied together and the output of the other pair is connected to the input of the NAND gate. While the NAND gate is unasserted (with one input low, or both inputs high), the output of the NAND gate is simply the inverse of the second pair\'s output. If, however, both inputs to the NAND gate are asserted (with one input low, and the other high), the output of the NAND gate will be latched in its current state (on or off). In this way, the output of the NAND gate is kept in its current state as long as at least one input to the NAND gate is asserted. When both inputs to the NAND gate are low, the output will toggle (on or off).

One important feature of the CD4043BNSRE4 is its ability to consume very low power, making it ideal for battery-powered or low power applications. Its power consumption is typically below 0.2 mA per device (under 1.5 V). This allows it to be used in portable applications and where long operating times are required. The device has balanced propagation delays, allowing for high performance and low latency in critical applications. Additionally, there is low crosstalk between channels, helping to keep the logic signals nice and clean.

The CD4043BNSRE4 is a versatile logic latch component with several versatile features, making it useful for many digital systems. Its low power consumption, balanced propagation delays, and low crosstalk between channels make it a great choice for many types of logic circuits. Additionally, its latching feature makes it suitable for applications in which data must be transferred or the same operation must be repeated over and over. It is a very robust chip with reliable performance.

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