SN74AS138D

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Logic-Signal Switches, Multiplexers, Decoders are important components in the development of modern technology. The SN74AS138D chip is one such component that is used to guide signals and power, allowing for safer and more efficient control of electrical systems.

The SN74AS138D is a 3-to-8 line decoder with priority decoding and input for high to low enable. It is an integrated circuit that is designed to provide eight outputs that are normally low but are enabled to become high when one (or more) of three select input lines are higher or active. The chip can operate over a range of supply voltages from 2 to 6 volts and the various enable levels, ranging from 2 to 6V, means that the device can function in a range of systems.

The SN74AS138D operates by providing two enable inputs. A high-to-low enable, labeled E2 and also a low-to-high enable, labeled ENAB. Depending on which of the two enables is active, determines how the chip operates. If the high-to-low enable is active, then the chip performs as an active low 3-to-8 line decoder; if the low-to-high enable is active, it acts as an active high 3-to-8 line decoder instead.

The SN74AS138D has a priority decode feature which means if more than one input is high, then the highest priority or topmost active input is chosen. This can work as a disadvantage as it means complex circuitry or combinational functions must be designed to ensure that only one or the other of the input lines is active. For example if E2 is active then there must be no more than one active input line, otherwise the highest priority decode will be the only output.

The SN74AS138D is useful in the interface modulating and switching of logic levels and signals, application in digital data processing, and other applications involving digital-to-analog conversion. It is also used in devices such as CMOS ROM and in Microprocessors, Micro-Controllers, Digital Communications such as FSK, GSM and CDMA, Automatic Control Circuits, and in the switching and conversion of Telephone Signals. By changing the logic level, the SN74AS138D helps simplify the design in applications that require multiple inputs or multiple output logic levels.

The SN74AS138D is an easy to use and highly reliable device. Its two enable inputs and priority decode features make this chip a great choice for applications requiring a moderate number of input signals, such as those found in microprocessors, automated control circuits, digital data processing, and other digital communication systems. It has become a standard component in many types of electronic systems and its efficient decoding capabilities makes the SN74AS138D a popular choice amongst engineers.

The specific data is subject to PDF, and the above content is for reference