The MC74AC299/74ACT299 is an 8−bit universal shift/storage register with 3−state outputs. Four modes of operation are possible: hold (store), shift left, shift right and load data. The parallel load inputs and flip−flop outputs are multiplexed to reduce the total number of package pins. Additional outputs are provided for flip−flops Q0, Q7 to allow easy serial cascading. A separate active LOW Master Reset is used to reset the register.

• Common Parallel I/O for Reduced Pin Count
• Additional Serial Inputs and Outputs for Expansion
• Four Operating Modes: Shift Left, Shift Right, Load and Store
• 3−State Outputs for Bus−Oriented Applications
• Outputs Source/Sink 24 mA
• ′ACT299 Has TTL Compatible Inputs