MC74AC299

( DataSheet : www.DataSheet4U.com ) MC74AC299 MC74ACT299 8ĆInput Universal Shift/Storage Register with Common Parallel I/0 Pins 8-INPUT UNIVERSAL SHIFT/STORAGE REGISTER WITH COMMON PARALLEL I/O PINS 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 VCC 20 S1 19 DS7 18 Q7 17 I/O7 16 I/O5 15 I/O3 14 I/O1 13 CP 12 DS0 11 DW SUFFIX CASE 751D-04 PLASTIC N SUFFIX CASE 738-03 PLASTIC 1 S0 2 OE1 3 OE2 4 I/O6 5 I/O4 6 I/O2 7 I/O0 8 Q0 9 MR 10 GND PIN NAMES CP DS0 DS7 S0, S1 MR OE1, OE2 I/O0–I/O7 Q0, Q7 Clock Pulse Input Serial Data Input for Right Shift Serial Data Input for Left Shift Mode Select Inputs Asynchronous Master Reset 3-State Output Enable Inputs Parallel Data Inputs or 3-State Parallel Outputs Serial Outputs LOGIC SYMBOL S0 S1 CP DS0 DS7 Q7 OE MR Q I/O I/O I/O I/O I/O I/O I/O I/O 0 0 1 2 3 4 5 6 7 www...