DM74AS646NT

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The DM74AS646NT, part of Texas Instruments’ 74AHC/AHCT/AC logic family, is an octal bus transceiver with non-inverting 3-state outputs. It is packaged in the small outline integrated circuit (SOIC) package and available in the Green package. This bus transceiver provides bidirectional level conversions between VCC and VSS logic levels while transmitting data in either direction. With this part, an open collector bidirectional transceiver is used to isolate two parts of a controller, expand ports, and maximize the use of signal lines for bidirectional data exchange. The DM74AS646NT is designed for the ac signal in mixed mode applications and is characterized for operation from -55oC to 125oC, from 0-70C for the Green alternative.

The applications fields are diverse and include networking, transport and data exchange, servers, routers, ASSP/ASIC bus applications and more. The device family is designed to be used as an address driver, general purpose peripheral for data acquisition, an octal tristate bidirectional transceiver, an address/data driver for shared memory applications, and more.

The working principle of the DM74AS646NT is to provide high drive output when it is enabled. The output is enabled by the OE (output enable) pins. The data direction is determined by the DIR(data direction) pins. When the OE input is high, the data is available at the output and the outputs are in high impedance state, while when the OE input is low all the outputs are in the low state.The input data follows the data direction pins. When the DIRinput is low, all the data is transferred to the A outputs and when the DIRis high the data is transferred to the B outputs in MSB (most significant bit) first, LSB (least significant bit) last order. The bidirectional data that is transmitted on the bus are isolated from VCC and VSS logic levels by the open collector buffers, providing improved data transmission and flexibility for data transmission. The device also features a series of 3-state outputs, which can be controlled independently, providing more control and flexibility for data communication.

The DM74AS646NT bus transceiver device is designed to operate in a wide range of logic types and logic families, providing robust and reliable data transmission. The built-in logic levels and basic logic functions enable the device to operate in a wide range of conditions and applications. The device also features high speed data transfer capability with fast edge rates, making it suitable for high performance applications. In addition, the device has an active low power-down protection circuit (Schmoo Diagram generator) which allows the device to be configured for low-power applications.

The DM74AS646NT octal bus transceiver with non-inverting 3-state outputs is a versatile device with applications in many logic families and logic types. This device provides improved data transmission and flexibility for data communication by isolating the bus from VCC and VSS logic levels through its open collector buffers. It also features a series of 3-state outputs, which can be controlled independently, providing more control and flexibility for data exchange. In addition, the device is fast and suitable for high performance applications with its high speed data transfer rates. Furthermore, the device has an active low power-down protection circuit Schmoo Diagram generator, making it suitable for low-power applications. In summary, the DM74AS646NT provides a cost-effective solution that can operate in a wide range of logic families and logic types, making it perfect for many logic and data communication applications.

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