CD74HCT259M [Texas Instruments]

The CDx4HC(T)259 is a high-speed SMOS logic 8-bit addressable latch with buffered inputs and outputs. It supports four operating modes including addressable latch, memory, 8-line demultiplexer, and reset mode. Key features include typical propagation delay of 15ns at Vcc=5V, fanout of 10 LSTTL loads for standard outputs and 15 for bus driver outputs, wide operating temperature range from -55°C to 125°C, balanced propagation delay and transition times, and significant power reduction compared to LSTTL logic. HC types operate from 2V to 6V with high noise immunity, while HCT types operate from 4.5V to 5.5V with direct LSTTL input compatibility and CMOS input compatibility.