D84044B-46

The D84044B-46 is a 4-way, 2-driven, hex-inverting bus transceiver, and is part of a family of small outline transceivers from Texas Instruments. This device is exceptionally versatile, as it can be used to connect different parts of an integrated circuit, as well as serve as a communications interface between integrated circuits and other peripheral devices, such as microprocessor systems. This article provides a brief overview of the D84044B-46\'s application field and working principle.

Application Field

The D84044B-46 is often used in two widely separated application fields: the first is the control of off-chip components, such as in the transfer of data from a microprocessor system to other peripheral devices, or the powering and regulation of other devices from a source. The second application field for this device is for the interfacing of logic circuits within a single semiconductor device, for example, for the transfer of data from one portion of the chip to another for processing.

Working Principle

The working principle of this device is simple enough. It is a bidirectional transceiver which processes data along two channels. Each channel is composed of two control gates, one for sending data and one for receiving it. To send data, the device first takes in information from the controller, then sends out the same information to the receiver. When the data is received, the transceiver re-inverts it and communicates it back to the controller. The devices internals are composed of four high-speed CMOS inverters with the two previously mentioned drivers for both the send and receive channels. The input is also able to be buffered for protection against excessive voltage.

Conclusion

The D84044B-46 is a powerful and versatile transceiver, capable of both powering and transferring data, both to and from off-chip components, and between integrated circuits or within a single chip. Its internal components make use of four high-speed CMOS inverters, two of which are drivers, to send and receive data. Its application field spans activities such as data-transfer between microprocessor systems and peripherals, as well as for the passing of data within an integrated circuit.