54AC646

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
Note 2: Absolute maximum ratings are those values beyond which damage to the device may occur. 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 54AC646 consist of registered bus transceiver circuits, with outputs, D-type flip-flops and control circuitry providing multiplexed transmission of data directly from the input bus or from the internal storage registers. Data on the A or B bus will be loaded into the respective registers on the LOW-to-HIGH transition of the appropriate clock pin (CPAB or CPBA). The four fundamental data handling functions available are illustrated in .