ON Semiconductor 74FST3244: 8-Bit Dual Supply Bus Transceiver

The 74FST3244 from ON Semiconductor is a high-performance, 8-bit dual supply bus transceiver designed with two individual 8-bit bus transceiver blocks with 3-state outputs. This integrated circuit (IC) is ideal for asynchronous communication between two buses of different voltage domains. With its ability to perform voltage level translation from 5V to 3.3V and vice versa, it is an essential component for mixed-voltage systems.

Key Features:

• Dual-Supply Voltage Ranges: This device operates with a V<sub>CC range of 4.5V to 5.5V on the A side and a V<sub>CC range of 3.0V to 3.6V on the B side, facilitating voltage translation between the two domains.
• High-Speed Data Transfer: The 74FST3244 boasts a fast data transfer capability with a max data rate of up to 250 Mbps, ensuring quick and efficient communication between devices.
• Bi-Directional Interface: Each byte of this transceiver can be independently configured as either an input or an output, providing flexibility in directional control.
• Low On-Resistance: Characterized by low ON resistance connections between the input and output ports, this feature minimizes propagation delay and supports high-speed data transfer.
• Power-Off Protection: The 74FST3244 has power-off protection on both the A and B ports, which ensures that the device remains off if either V<sub>CC input is at GND level.
• Tri-State Outputs: The 3-state outputs, which can be placed in a high impedance state, allow for easy connection to a bus that might also be connected to other devices.
• Low Quiescent Power Consumption: This device has a significantly low quiescent current, which makes it suitable for power-sensitive applications.

Applications:

The 74FST3244 is versatile and can be used in various applications, including but not limited to:

• Bus interface or signal buffering between different voltage domains within telecom, computing, and consumer electronics.
• Level shifting in multi-voltage systems for industrial controls and automotive sectors.
• Hot-swapping and hot-docking operations where different voltage planes need interfacing.

With its robust design and ON Semiconductor's commitment to quality, the 74FST3244 is a reliable choice for designers looking to bridge the gap between 5V and 3.3V systems while maintaining signal integrity and speed.