STMicroelectronics 74LCX16245TTR Low Voltage Bidirectional Transceiver

The 74LCX16245TTR from STMicroelectronics is a high-performance, low-voltage, 16-bit bidirectional transceiver designed for asynchronous communication between data buses. It is part of the LCX family which is known for its low power consumption and high-speed operation. This transceiver is particularly suitable for interfacing with 3.3V and 5V systems in a mixed 3.3V/5V supply environment.

The device features 16-bit dual-supply bus transceiver with 3-state outputs and can operate as two 8-bit transceivers or one 16-bit transceiver. It allows for bidirectional data flow with two separate supply voltages, which facilitates level shifting between systems operating at different voltage levels. The 74LCX16245TTR is designed to be used with minimal external components, simplifying the design and reducing the overall system cost.

Key features of the 74LCX16245TTR include:

• 5V tolerant inputs and outputs for interfacing with 5V logic levels
• Support for mixed-mode voltage operation on all ports
• Guaranteed low voltage range: 2.0V to 3.6V
• High-speed operation: 4.5ns maximum propagation delay
• Power-off high impedance inputs and outputs
• Support for live insertion and withdrawal (partial power-down)
• Multiple package options including TSSOP and SSOP

The device's control inputs (DIR and OE) dictate the direction of data flow and output enable/disable, respectively. When the output enable (OE) input is high, the device's outputs are in a high impedance state, which is particularly useful during power up or power down when buses need to be isolated.

The 74LCX16245TTR is packaged in a thin shrink small outline package (TSSOP) with 48 pins, providing a compact footprint that is ideal for space-constrained applications. Its robust design includes overvoltage tolerance and latch-up performance that meets the JEDEC standard JESD 17, ensuring reliable operation even under challenging conditions.

Applications for the 74LCX16245TTR include memory interconnection, data communication, and signal bridging in a wide range of products such as computers, telecommunications hardware, and industrial control systems. With its advanced features and compliance with the stringent industrial standards, this transceiver is an excellent choice for designers looking to create high-performance, reliable, and cost-effective data bus communication systems.