54FCT521

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 V_CC or Ground Current
per Output Pin (I_CC or I_GND)... .... ±50 mA
Storage Temperature (T_STG) .. 65°C to +150°C
Junction Temperature (T_J)
CDIP..................... 175°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 54FCT521 is an expandable 8-bit comparator. It compares two words of up to eight bits each and provides a LOW output when the two words match bit for bit. The expansion input I_{A = B} of 54FCT521 also serves as an active LOW enable input.