U74AC240L-P20-T中文资料友顺数据手册PDF规格书

DESCRIPTION

The U74AC240 is a octal buffers/drivers 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 U74AC240 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; 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 6.5 ns from A to Y at 5V

* Low Power Consumption, ICC = 4μA (Max.) at 5.5V

* ±24mA Output Driver at 5.5V