M74LCX16240DTR2G

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The M74LCX16240DTR2G is a 16-bit buffer/line driver with open-drain outputs. By implementing a three-state buffer, the device provides bidirectional drive capability, outputs which do not have to be actively driven, and therefore, can be wire-ORed. Each output has an open-drain structure which, in combination with an external pulled-up resistor, permits the output state to become a three-state condition. With this device, digital signal buffering is possible, allowing for increased speed and better performance.

The M74LCX16240DTR2G is organized into two 8-bit buffers with separate input and output enable control lines. It also includes bus-hold circuitry that activates on the falling edge of an output enable signal. This bus-hold circuitry holds the level of data inputs after the falling edge of the output enable signal, and gives a guarantee that the data is retained even if the data input is inconsistent or indeterminate. Thus, one way to use this device is to allow a processor with limited drive capability, such as SIO or SSTL types, to drive larger fan-out. Communication receivers too can benefit from this device by buffering the incoming signal from the interfacing layer.

A wide variety of applications can use the M74LCX16240DTR2G, including high-speed data bus applications, bus-hold applications, wire ORing applications, and other three-state buffering applications. The device is certified by the Automotive Electronics Council (AEC) and is compliant with the following standards, including AEC-Q100, AEC-Q102, and TS16949.

The working principle of the M74LCX16240DTR2G relies on the use of open-drain outputs. This device employs a common-source open-drain output stage which consists of an NMOS transistor and two gate terminals, the gate and the drain. The NMOS transistor is turned off when both the gate and drain terminals are at logic low level, thereby enabling the open-drain configuration. The NMOS also allows for bi-directional drive capability, and outputs that do not need to be actively driven. With this device, it is also possible to create a three-state output condition, in which the output is either high, low, or in the three-state configuration.

The M74LCX16240DTR2G also includes bus-hold circuitry. This circuitry is activated on the falling edge of an output enable signal. When the output enable signal goes low, the bus-hold circuit holds the level of data input, even if the data input is inconsistent or indeterminate. This robust feature ensures that the data receiver is reliable even if the data input becomes indeterminate. This circuitry takes two power pins and two input pins to control 16 outputs.

In conclusion, the M74LCX16240DTR2G is an ideal device for buffering and three-state buffering applications. From high-speed data buses to wire-ORing applications, this device ensures reliable performance of digital signal buffering. It uses open-drain outputs, bidirectional drive capability, as well as bus-hold circuitry to provide robust power protection. Furthermore, it is certified by the AEC and is compliant to the standards of AEC-Q100, AEC-Q102, and TS16949.

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