SN74HC251DBR

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The SN74HC251DBR is a device in the Logic - Signal Switches, Multiplexers and Decoders family. It is used to route a 4-bit data selector/multiplexer with storage. Its main purpose is to be used as an address director to map various enter/exit switches from a 16 pin package. It offers an address decoding function and allows for an efficient and economical solution for data routing.

The SN74HC251DBR has an identical logic level for both its input and output, making it easy to interface with other circuits. It operates from 4.5V to 5.5V, and includes an active low output enable for low power dissipation.

The current production mode of the SN74HC251DBR is CMOS and the output driver is designed with two 6-transistor stages. It has a low power operation of 15 mA at 5V and a static power dissipation of 2.0 W at 25°C. This low power helps meet the low voltage requirements of many applications, while also providing a fast, accurate data transfer. The SN74HC251DBR has a data select/enable input which is used to select between two 4-bit data buses and stores their contents in the device’s memory. It also has the open-collector outputs, ENA and ENB, which are connected to an active low output enable that allows for more efficient operation.

The SN74HC251DBR is available in three package types: DIP-16, SOIC-16, and a VCC-16. The VCC type is most commonly used because it is a surface mount version and therefore easier and faster to assemble than its more traditional counterparts. Every VCC package includes an internal logic circuit that is used to drive the select inputs and ensure accurate data processing.

The SN74HC251DBR is a 4-bit multiplexer used to route one of two 4-bit data buses and maintains storage in its device memory. It provides address decoding and low power dissipation, in addition to a feature that enables faster, more accurate data transfer. With its multiple package types, the SN74HC251DBR offers an efficient and economical solution for data routing.

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