General description
The 74HC299 is an 8-bit universal shift register with 3-state outputs. It contains eight edge-triggered D-type flip-flops and the interstage logic necessary to perform synchronous shift-right, shift-left, parallel load and hold operations.
   
Features and benefits
■ Input levels:
    ◆ For 74HC299: CMOS level
■ Multiplexed inputs/outputs provide improved bit density
■ Four operating modes:
    ◆ Shift left
    ◆ Shift right
    ◆ Hold (store)
    ◆ Load data
■ Operates with output enable or at high-impedance OFF-state (Z)
■ 3-state outputs drive bus lines directly
■ Cascadable for n-bit word lengths
■ ESD protection:
    ◆ HBM JESD22-A114F exceeds 2000 V
    ◆ MM JESD22-A115-A exceeds 200 V
■ Specified from -40°C to +85°C and from -40°C to +125°C