SN74ALS08DR

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Logic-gates and inverters play a major role in electronic circuits. These gates and inverters enable signals to be logically combined which eventually helps the circuits to function in the way they are intended to be. In this article, we discuss one such type of an inverter, the SN74ALS08DR, and its application field and working principle.

The SN74ALS08DR is an 8-bit bus transceiver with 3-state outputs. It is an 8-bit non-inverting register with an enable input that has active-low output enable. The SN74ALS08DR consists of four separate 8-bit buffer/drivers, each with a common enable input. This device can be used for data transmission in many applications such as network bridges and the implementation of register transfers within a bus orientation by providing address and data isolation between different bus directions.

The SN74ALS08DR has two input terminals that are labeled as A0 - A7 and D0 - D7. A0 - A7 are the input lines for the eight bit data, while D0 - D7 are the output lines for the eight bit data. The SN74ALS08DR also consists of three control terminals, labeled as OE (Output Enable), BE (Bus Enable) and LE (Latch Enable).

The OE (Output Enable) terminal is used to disable the SN74 ALS08DR outputs. When the OE terminal is low the output drivers are enabled and the output data will be transferred on the corresponding lines; and when the OE terminal is high the drivers are disabled and the output data is set to a High-Z (high impedance) state.

The BE (Bus Enable) terminal is used to determine the direction of the data flow. When the BE terminal is low, the data flow is from the A0 - A7 (Input Lines) to the D0 - D7 (Output Lines). And when the BE terminal is high, the data flow is from D0 - D7 (Output Lines) to A0 - A7 (Input Lines).

The LE (Latch Enable) terminal is used to latch the data that is present on A0 - A7 (Input Lines) or the data that is transmitted on D0 - D7 (Output Lines). When LE is low, the data is latched, and when LE is high the data is not latched.

The SN74ALS08DR has several applications in data transportation that include but are not limited to, network bridges, inter-bus isolation, DMA controller and MEMs / ROMs applications. As it is an 8-bit register, it can provide data transfer in 8-bits at a time, which is useful for buffering and clock signal generator applications. The SN74ALS08DR has an access time of 200ns and it can provide an output of 3.6V when the active-low signal is sent to the OE terminal.

In conclusion, the SN74 ALS08DR can be used in several applications that require 8-bit data to be transferred. It has three control terminals and two input/output lines that can be used to control and transfer the data. Besides this, it features an access time of 200ns and can provide a voltage output of 3.6V.

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