74LCX841WM

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The 74LCX841WM is a low-power, quad direction latch from the expansive 74LCX family of products sold by NXP Semiconductors. It is a high-bandwidth device comprised of four separate banks, each composed of two D latches whose inputs are defined by set and reset directions.

The 74LCX841WM’s output drivers permit its outputs to be used as general logic functions without the need for active-low components, allowing for a wide range of applications. It is available in two versions: the 74LCX841WM-7, which is 5 V tolerant and can drive up to 15 mA per output, and the 74LCX841WM-9, which offers improved protection against ESD.

The 74LCX841WM’s logic is protected through inherent ESD protection when used in a 5 V logic environment. It also incorporates Schmitt trigger logic inputs to optimize noise margin and reduce glitches.

The 74LCX841WM belongs to the broad category of latches, with specifications that make it applicable to various fields. It has an operating voltage range of 2.3 V to 3.6 V and is a +3.3 V only device. It features low power consumption, with output hold and second level times of 0.4 µs max and 4 µs max, respectively.

The simplest way to describe the working principle of the 74LCX841WM is to explain the operation of its two D latches. A D latch, also known as a data latch, consists of two logic inputs (S and R) and two outputs (Q and QN). When the logic input S is pulled low and R is pulled high, then the output Q is pulled low, and the output QN is pulled high. Similarly, when S is pulled high and R is pulled low, then the output Q is pulled high, and the output QN is pulled low.

The 74LCX841WM’s four latch banks have independent S and R controls, as well as independent outputs Q and QN. It is also designed with bistable input and output pins that permit it to be used as a change detector or as a level detector (for example, it can be used as a 2-bit level detect logic device).

The 74LCX841WM latch is primarily used in the design of logic systems and consumer electronics. Specifically, it can be used in control and status applications such as memory and shift register systems, as well as in circuits that interface with external devices such as central processing units and microchip controllers. It is also used in circuits that require data or information to be stored, such as timing and multiplexer latches, or in any system that requires changeable control logic.

In conclusion, the 74LCX841WM low-power, quad direction latch from the 74LCX family of NXP Semiconductors is a highly versatile, low power device that offers a broad range of applications in the area of logic systems and consumer electronics. Its two D latches provide two independent S and R control pins, as well as independent outputs Q and QN, allowing for multiple configurations. Its robust set of features makes it suitable for a wide range of control and status applications, including interfaces with external devices and circuits that require data storage.

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