U74AHC573

DESCRIPTION 

The U74AHC573 is an octal transparent D-type latch with 

3-state outputs, and it has 8 channels. 

When the OE input is low and the LE input is high, the Q 

outputs follow the D inputs. When OE is low and LE is low, the 

Q outputs are latched at the logic levels of the D inputs.

When the OE input is high, the outputs are in the 

high-impedance. The OE does not affect the internal operations 

of the latches. Old data can be retained or new data can be 

entered while the outputs are in the high-impedance state. 

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 

* Operate from 2V to 5.5V 

* Inputs Accept Voltages to 5.5V 

* Max tPD of 13ns at VCC=3.3V, CL=15pF 

* Typ VOL< 0.36V at VCC=4.5V, IOL=8mA, TA=25°C 

* Typ VOH> 3.94V at VCC=4.5V, IOH=-8mA, TA=25°C