U74HC240

DESCRIPTION 

The U74HC240 is a octal buffer and line driver with 3-state 

outputs. It is organized as two 4-bit buffers/drivers with separate 

output-enable ( OE ) inputs. When OE is high, the Y outputs are in 

a high-impedance state and the outputs neither load nor drive the 

bus lines. When OE is low, the device passes inverted data from 

the A inputs to the Y outputs. 

The U74HC240 is designed to improve the performance and 

density of 3-state memory address drivers, clock drivers and 

bus-oriented receivers and transmitters. 

To ensure the high-impedance state during power up or power 

down, OE should be tied to VCC through a pull-up resistor; and the 

minimum value of the resistor is determined by the current-sinking 

capability of the driver. 

FEATURES 

* Wide supply voltage range from 2V to 6V 

* Max tpd of 9 ns from A to Y at 6V 

* Low power consumption, ICC = 8 μA (Max.) at 6V 

* ±6 mA output driver at 5V 

* Low Input Current of 1 μA Max 

规格书U74HC240