54ACT299

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.

Supply Voltage (V_CC)........... −0.5V to +7.0V
DC Input Diode Current (I_IK)
V_I = −0.5V ................ ....−20 mA
V_I = V_CC + 0.5V.................. +20 mA
DC Input Voltage (V_I) .........−0.5V to V_CC + 0.5V
DC Output Diode Current (I_OK)
V_O = −0.5V..................... −20 mA
V_O = V_CC + 0.5V.............. .... +20 mA
DC Output Voltage (V_O) ........−0.5V to V_CC + 0.5V
DC Output Source
or Sink Current (I_O) .................±50 mA
DC VCC or Ground Current
per Output Pin (ICC or I_GND) .............±50 mA
Storage Temperature (T_STG) .......−65°C to +150°C
Junction Temperature (T_J)
CDIP.......................... 175°C
Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. Obviously the databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. National does not recommend operation of FACT® circuits outside databook specifications.

The 54ACT299 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. Additional outputs of 54ACT299 are provided for flip-flops Q0, Q7 to allow easy serial cascading. A separate active LOW Master Reset is used to reset the register.