General description
The 74AHC259; 74AHCT259 is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard No. 7-A.
   
Features
■ Balanced propagation delays
■ All inputs have Schmitt-trigger actions
■ Combines demultiplexer and 8-bit latch
■ Serial-to-parallel capability
■ Output from each storage bit available
■ Random (addressable) data entry
■ Easily expandable
■ Common reset input
■ Useful as a 3-to-8 active HIGH decoder
■ Inputs accept voltages higher than VCC
■ Input levels:
    ◆ For 74AHC259: CMOS level
    ◆ For 74AHCT259: TTL level
■ ESD protection:
    ◆ HBM EIA/JESD22-A114E exceeds 2000 V
    ◆ MM EIA/JESD22-A115-A exceeds 200 V
    ◆ CDM EIA/JESD22-C101C exceeds 1000 V
■ Multiple package options
■ Specified from −40 °C to +85 °C and from −40 °C to +125 °C