description/ordering information
●The ’AHC573 devices are octal transparent D-type latches designed for 2-V to 5.5-V VCC operation. When the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is low, the Q outputs are latched at the logic levels of the D inputs. A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components.
●OEdoes 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, OEshould be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
●Operating Range 2-V to 5.5-V VCC
●3-State Outputs Directly Drive Bus Lines
●Latch-Up Performance Exceeds 250 mA Per JESD 17
