The 54AC646SDMQBQS is an octal transceiver with tristate outputs manufactured by National Semiconductor, now part of Texas Instruments (TI). It is designed for high-performance bus interface applications, offering bidirectional data transfer and control. The device is part of the advanced CMOS (AC) logic family, providing high speed and low power consumption. Its availability in military-grade packaging (SDMQBQS) indicates suitability for harsh environments.

Applications

• High-performance bus interfaces
• Bidirectional data transfer systems
• Military and aerospace electronics
• Data communication equipment
• Memory interface circuits
• Microprocessor-based systems

Features

• Octal transceiver with bidirectional data flow
• Tristate outputs for bus isolation
• High-speed operation
• Low power consumption
• Military-grade temperature range
• Advanced CMOS (AC) logic family
• Available in surface-mount package

Benefits

• Enables efficient data transfer between buses, enhancing system performance.
• Provides bus isolation, preventing data contention and ensuring signal integrity.
• Reduces power consumption, extending battery life in portable applications.
• Operates reliably in extreme temperature environments, making it suitable for military and aerospace applications.
• Simplifies circuit design with its octal configuration and tristate outputs.

Additional Details

The 54AC646SDMQBQS features two sets of eight input/output (I/O) pins (A0-A7 and B0-B7), control signals for direction control (DIR) and output enable (OE). The DIR input determines the direction of data flow, while the OE input enables or disables the outputs. When OE is high, the outputs are in a high-impedance state, effectively isolating the device from the bus. The AC logic family offers faster switching speeds than standard CMOS logic, making it suitable for high-speed applications. The SDMQBQS package is a surface-mount package designed for military and aerospace environments, providing high reliability and resistance to mechanical stress.

Typical specifications include: Supply Voltage (VCC) range (typically 2.0V to 6.0V), Input Voltage levels (VIH, VIL), Output Voltage Levels (VOH, VOL), Propagation Delay Times (tPLH, tPHL), and Operating Temperature Range (typically -55°C to +125°C).