DM74AS646WM

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The DM74AS646WM is a 16-bit bus transceiver that is part of the Advanced Schottky TTL (AS-TTL) logic family and is classified as a Logic - Buffers, Drivers, Receivers, Transceivers. This device is designed to support a variety of applications, ranging from low-cost, digitized data transmission to high speed logic interfacing. It features low-power operation, a rugged construction, and is available in a number of packages, including a 6-pin micro SMD, 8-pin PDIP, and 8-pin SOIC.

The AS-TTL family has several specific attributes, including low to medium speed signals, standard data transfer rates up to 10 Mbits/second, wide supply voltage ranges from 3.0V to 15V, and robust logic protection. The internal logic uses Schottky diodes which provides increased speed performance over standard TTL. Some devices of this family also come with an internal ESD protection circuit, allowing for improved signal integrity. Additionally, the AS-TTL logic family also utilizes a signal power booster to reduce the effects of noise interference.

The DM74AS646WM employs a number of different elements to achieve its desired purpose. It is constructed of two wide-voltage-range sections: the transmitter and receiver. The transmitter section includes two inverters which drive the input signal directly, while the receiver section features a number of Schottky clamps, level-shifters, and buffers to ensure reliable signal reception. Additionally, the device features an asynchronous bidirectional data bus capability, allowing for simple data transfer between two sources.

The actual operation of the DM74AS646WM occurs within the synchronous transmission scheme. This scheme allows for an effective data-transfer rate of up to 10 Mbits/second, with clock signals as low as 0.5V. During the process, it drives the receiver inputs off the transmitter outputs, and also driving the transmitter outputs off the receiver inputs. At any given time, only one of either the transmitter or receiver will be active, thus avoiding any conflicts during operation.

The DM74AS646WM is a versatile device that can support a variety of applications, ranging from low-cost, digitized data transmission to high speed logic interfacing. It offers low power operation, a robust construction, and various package options, making it an optimal choice for various applications.

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