The TC74VCX162834 is a 18-bit universal bus driver with bus-hold, designed for very high-speed, low-voltage operation. It is part of Toshiba's VCX family, known for its advanced CMOS technology, providing significant speed improvements compared to conventional CMOS logic while maintaining low power consumption. The bus-hold feature ensures that unused inputs are held at a valid logic level, preventing floating inputs and reducing power consumption.

Applications

• Bus interface
• Data buffering
• Memory addressing
• Peripheral control
• Data transmission

Features

• Low-voltage operation: 1.65 V to 3.6 V
• High-speed operation: tpd = 3.0 ns (typical) at VCC = 3.3 V
• Bus-hold circuitry
• 3-state outputs for bus isolation
• Output impedance control
• Low power consumption

Benefits

• Improved system performance due to high-speed operation
• Reduced power consumption, extending battery life in portable devices
• Eliminates the need for external pull-up or pull-down resistors
• Versatile interface with 3-state outputs
• Simplified system design with bus-hold feature
• Reliable operation over a wide voltage range

Additional Details

The TC74VCX162834 features eighteen independent bus drivers with 3-state outputs. The output enable (OE) input controls the output state. When OE is low, the outputs are enabled; when OE is high, the outputs are in the high-impedance state. The bus-hold circuitry maintains the last valid logic level on unused inputs, preventing them from floating and potentially causing increased power consumption or erratic behavior. The device is designed with an output impedance control circuit to minimize reflections and signal distortion in high-speed applications. The operating temperature range is -40°C to +85°C, making it suitable for a wide range of environments. The propagation delay is typically 3.0 ns at 3.3V, ensuring fast and efficient data transfer. The device supports a wide operating temperature, and it is RoHS compliant.