SN74LVC841APWT

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The SN74LVC841APWT is a logic latch device from the 74LVC logic family, one of a range of multiple-functional and low voltage CMOS devices available from Texas Instruments. It features two independent latches, each capable of storing a binary data bit and operating off a single supply voltage as low as 1.65V. Due to its various attributes and features, it is suitable for a range of applications and has been used in many technologies from biometrics to automotive systems. This article will explore the SN74LVC841APWT logic latch device, exploring its application fields and its working principle.

Applications

The SN74LVC841APWT provides a range of features that make it suitable for use in many applications. It is capable of directly driving standard CMOS loads, such as memory devices and circuits, and also two-level Emitter Coupled Logic (ECL) loads, such as high speed ALUs. The device\'s low power consumption and low supply voltage requirements make it energy efficient and suitable for battery powered and low voltage applications. It is also able to operate in temperatures of between -40 and 125 degrees celsius, meaning it is able to perform dependably even in extreme conditions. One of the applications the SN74LVC841APWT is commonly used for is biometric access systems. In these systems, the latch provides a secure, yet convenient system for granting access to authorized users. Another application is automotive electronics. In cars, the latch is used to replace mechanical switches and relays, providing a reliable and maintenance-free switch. In addition, due to its low voltage and small package, it can fit into small spaces such as electronic door locks, power door openers and window control systems.

Working Principle

The SN74LVC841APWT has two independent latches, each of which can store a single bit of data. The device features two active-low enable inputs and two active-high enable inputs. The data signals are input to the latches via two inputs, D1 and D2, and the outputs, Q1 and Q2, provide the stored data. When the two active-low enables, E1 and E2, are at a low level and the active-high enables, E1* and E2*, are at a high level, both latches are forced into the OFF state. When power is applied to the device, the flip-flops are reset and forced into the off state. When the active-low enables, E1 and E2, are brought to a high logic level, data appears at the input pins, D1 and D2, is stored in the latches, and is output at the Q1 and Q2 pins. If either of the active-high enables, E1* and E2*, is brought to a high logical level, both latches are forced into the off state, regardless of the active-low enables. If the active-high enables are low and the active-lowes enables are low, the data stored in the latches is not changed.In summary, the SN74LVC841APWT is a logic latch device from the 74LVC family which is suitable for use in a range of applications from biometric access systems to automotive electronics. It has two independent latches capable of storing a binary data bit and operates off a single supply voltage as low as 1.65V. It features two active-low enable inputs, two active-high enable inputs, two input pins and two output pins.

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