SN74AVC4T245DR Integrated Circuits (ICs)

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The SN74AVC4T245DR is a low-power quad bidirectional transceiver with configurable voltage translation and 5-V tolerance on the A ports. This device is designed to interface between 5-V devices and USB3.0 and other standards at 1.8-V, 2.5-V, 3.0-V, and 3.3-V devices. The SN74AVC4T245DR is in volume production and supports USB3.0, SATA, HD audio, and consumer audio.

Application Field

The SN74AVC4T245DR is designed specifically to bridge the gap between low-voltage, low-power and 5-V logic systems. Its two-channel operation allows for two simultaneous data and/or power translation between two different logic families, with wide voltage-translation range from 1.3V to 5V. The device can also be used for signal and voltage translation between two pairs of logic families, such as LVTTL to HSTL or LVCMOS to SSTL.

Additionally, the device features live insertion/removal capability that provides protection for external components and for the device itself, during system hot-plug events. This makes the SN74AVC4T245DR suitable for embedded systems, such as those used in automotive, industrial, and consumer applications, that require protection against power surges.

Working Principle

The SN74AVC4T245DR consists of two Non-Inverting (3-State) Bus Transceivers with voltage translation on both Channels A and B from 1.3-V to 5-V. With two channels, the SN74AVC4T245DR can operate two simultaneous bi-directional interfaces between two different logic families with a voltage translation provided. The device contains two groups of input/output (I/O) ports which are paired: Channel A and Channel B. Each channel consists of four input/output pins, with both inputs and outputs dynamic bus-hold circuits, which helps to keep an input at a valid logic level when the input is not driven by an external source. When an output is put in the High-Impedance (3-State) condition, a weak pull-up circuit keeps the output at a valid logic level. The device also features a direction control input (DIR) which selects the direction of the data flow on each channel. The SN74AVC4T245DR is tolerant for input voltages up to 5V, with integrated VCCIO voltage selection of 1.8V, 2.5V, 3.0V, and 3.3V. The device supports both hot and cold insertion through the device ESD pins and provides electrostatic protection for inputs and outputs.

In summary, the SN74AVC4T245DR is a low-power logic translator that can translate between logic families with voltage ranges from 1.3V to 5V and features hot insertion/removal protection circuitry. Its application ranges from automotive to industrial and consumer applications. Moreover, the SN74AVC4T245DR provides electrostatic protection for inputs and outputs and dynamic bus-hold circuits which help to keep an input at a valid logic level.

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