●These octal latches are designed specifically for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.
●The eight latches of the LVTH573 devices are transparent D-type latches. While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the logic levels set up at 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 logic levels) or a 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 need for interface or pullup components.
●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 pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
●Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.
●These devices are fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.
● Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)
● Support Unregulated Battery Operation Down to 2.7 V
● Typical VOLP (Output Ground Bounce)
● <0.8 V at VCC = 3.3 V, TA = 25°C
● Ioff and Power-Up 3-State Support Hot Insertion
● Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
● Latch-Up Performance Exceeds 500 mA Per JESD 17
● ESD Protection Exceeds JESD 22
● 2000-V Human-Body Model (A114-A)
● 200-V Machine Model (A115-A)
