DM54LS299 Datasheet | National Semiconductor

Description The ’LS299 is an 8-bit universal shift storage register with TRI-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 Separate outputs are provided for flip-flops Q0 and Q7 to allow easy cascading A separate active LOW Master Reset is used to reset the register Features Y mon I O for reduced pin count Four operation modes shift left shift right load and store Separate shift right serial input and shift left serial input for easy cascading TRI-STATE outputs for bus oriented applications Connection Diagram Dual-In-Line Package TL F 9827 - 1 Order Number DM54LS299E DM54LS299J DM54LS299W DM74LS299WM or DM74LS299N See NS Package Number E20A J20A M20B N20A or W20A Pin Names CP DS0 DS7 S0 S1 MR OE1 OE2 I O0- I O7 Q0- Q7 Description Clock Pulse Input (Active Rising Edge) Serial Data Input for Right Shift Serial Data Input for Left Shift Mode Select Inputs Asynchronous Master Reset Input (Active LOW) TRI-STATE Output Enable Inputs (Active LOW) Parallel Data Inputs or TRI-STATE Parallel Outputs Serial Outputs TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 9827 RRD-B30M115 Printed in U S A Absolute Maximum Ratings (Note) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range b 55 C to a 125 C DM54 DM74LS 0 C to a 70 C Storage Temperature Range b 65 C to a 150 C Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed The device should not be operated at these limits The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings The...