MC74VHC259DR2G

The MC74VHC259DR2G from ON Semiconductor is an 8-bit addressable latch fabricated with silicon gate CMOS technology. It offers high-speed operation similar to equivalent Bipolar Schottky TTL devices while maintaining low CMOS power dissipation.

This latch is designed for general-purpose storage applications in digital systems and features four modes of operation: addressable latch, memory, one-of-eight decoding/demultiplexing, and reset. In the addressable latch mode, data on the Data In pin is written into the addressed latch, while non-addressed latches retain their previous states. The device supports a supply voltage range of 2V to 5.5V and operates across a temperature range of -55°C to 125°C.

The MC74VHC259DR2G is available in a 16-SOIC package and is suitable for surface mounting. Its input structure provides protection for voltages up to 7V, allowing it to interface 5V circuits to 3V circuits. Key electrical characteristics include a typical propagation delay of 7.6 ns at 5V, low power dissipation with a maximum ICC of 2 μA at 25°C, and high noise immunity.

Additional features include CMOS-compatible outputs, power-down protection on inputs and outputs, balanced propagation delays, and pin compatibility with other standard logic families. The device also exhibits high latchup performance exceeding 300 mA and ESD protection.