Features: • Outputs Directly Interface to CMOS, NMOS, and TTL• Operating Voltage Range: 2.0 to 6.0 V• Low Input Current: 1.0 A; 0.1 A @ 25• High Noise Immunity Characteristic of CMOS Devices• Outputs Source/Sink 24 mAPinoutSpecifications Symbol Parameter Value ...
KK74AC251: Features: • Outputs Directly Interface to CMOS, NMOS, and TTL• Operating Voltage Range: 2.0 to 6.0 V• Low Input Current: 1.0 A; 0.1 A @ 25• High Noise Immunity Characteristic...
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Symbol | Parameter | Value | Unit |
VCC | DC Supply Voltage (Referenced to GND) | -0.5 to +7.0 | V |
VIN | DC Input Voltage (Referenced to GND) | -0.5 to VCC +0.5 | V |
VOUT | DC Output Voltage (Referenced to GND) | -0.5 to VCC +0.5 | V |
IIN | DC Input Current, per Pin | ±20 | mA |
IOUT | DC Output Sink/Source Current, per Pin | ±50 | mA |
ICC | DC Supply Current, VCC and GND Pins | ±50 | mA |
PD | Power Dissipation in Still Air, Plastic DIP+ SOIC Package+ |
750 500 |
mW |
Tstg | Storage Temperature | -65 to +150 | |
TL | Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP or SOIC Package) |
260 |
The KK74AC251 is identical in pinout to the LS/ALS251, HC/HCT251. The KK74AC251 inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALS outputs.
KK74AC251 selects one of the eight binary Data Inputs, as determined by the Address Inputs. The Output Enable pin must be at a low level for the selected data to appear at the outputs. If Output Enable is high, the Y and the Y outputs are in the high-impedance state. This 3-State feature allows the KK74AC251 to be used in bus-oriented systems.