1FEATURES
· Qualified for Automotive Applications
· ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
· Operates From 2 V to 3.6 V
· Inputs Accept Voltages to 5.5 V
· Max tpd of 6.9 ns at 3.3 V
· Typical VOLP (Output Ground Bounce) < 0.8 V
at VCC = 3.3 V, TA = 25°C
· Typical VOHV (Output VOH Undershoot) > 2 V at
VCC = 3.3 V, TA = 25°C
· Supports Mixed-Mode Signal Operation on All
Ports (5-V Input/Output Voltage With 3.3-V VCC)
· Ioff Supports Partial-Power-Down Mode
Operation

DESCRIPTION/ORDERING INFORMATION
The SN74LVC573A octal transparent D-type latch is designed for 2.7-V to 3.6-V VCC operation.
This device features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance
loads. It is particularly suitable for implementing buffer registers, input/output (I/O) ports, bidirectional bus drivers,
and working registers.
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 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 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.
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.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.