Features: · ICC reduced by 50%· Select inputs from two data sources· Fully positive edge-triggered operation· Outputs source/sink 24 mA· ACT399 has TTL-compatible inputsPinoutSpecifications Temperature Min -55 deg C Temperature Max 125 deg C View Using CatalogIf Military/Aerospace spe...
54ACT399: Features: · ICC reduced by 50%· Select inputs from two data sources· Fully positive edge-triggered operation· Outputs source/sink 24 mA· ACT399 has TTL-compatible inputsPinoutSpecifications Tem...
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Temperature Min | -55 deg C |
Temperature Max | 125 deg C |
View Using Catalog |
If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Supply Voltage (VCC) .........................−0.5V to +7.0V
DC Input Diode Current (IIK)
VI = −0.5V ................................................−20 mA
VI = VCC + 0.5V ........................................+20 mA
DC Input Voltage (VI) ................−0.5V to VCC + 0.5V
DC Output Diode Current (IOK)
VO = −0.5V ...............................................−20 mA
VO = VCC + 0.5V .......................................+20 mA
DC Output Voltage (VO) ...........−0.5V to VCC + 0.5V
DC Output Source or
Sink Current (IO) .....................................±50 mA
DC VCC or Ground Current
per Output Pin (ICC or IGND ) ..................±50 mA
Storage Temperature (TSTG) .....−65°C to +150°C
Junction Temperature (TJ)
CDIP ......................................................+175°C
Note : 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 54ACT399 is the logical equivalent of a quad 2-input multiplexer feeding into four edge-triggered flip-flops. A common Select input determines which of the two 4-bit words is accepted. The selected data enters the flip-flop on the rising edge of the clock.
The 54ACT399 is the logical equivalent of a quad 2-input multiplexer feeding into four edge-triggered flip-flops. A common Select input determines which of the two 4-bit words is accepted. The selected data enters the flip-flop on the rising edge of the clock.