SN74AC573DW

The SN74AC573DW is a high-speed octal transparent latch designed by Texas Instruments, part of their 74AC series of digital logic devices. This component is particularly useful in applications requiring temporary data storage and manipulation, such as in data buffering and interfacing between different logic families.

Key Features:

1. Functionality: The SN74AC573DW consists of eight latches that are transparent when the enable (G) input is high. When the enable input is low, the latches hold the last state of the data inputs (D0-D7), effectively storing the data.

2. Data Inputs and Outputs: The device has eight data inputs (D0 to D7) and eight corresponding outputs (Q0 to Q7). The outputs reflect the state of the inputs when the latch is enabled.

3. Control Inputs:

   • Enable (G): This active-high input controls the transparency of the latches. When G is high, the latches are transparent, allowing data to pass through from the inputs to the outputs. When G is low, the outputs retain their last state.
   • Output Enable (OE): This active-low input allows for the outputs to be disabled, effectively tri-stating them. When OE is low, the outputs are enabled; when high, the outputs are in a high-impedance state.

4. Voltage Levels: The SN74AC573DW operates with a supply voltage (Vcc) typically ranging from 2V to 6V, making it compatible with various logic levels. It is designed to work with standard TTL and CMOS logic levels.

5. Speed: The device is characterized by its high-speed operation, with propagation delays typically in the range of a few nanoseconds, making it suitable for high-frequency applications.

6. Package Type: The "DW" suffix indicates that the SN74AC573 is available in a TSSOP (Thin Shrink Small Outline Package) form factor, which is compact and suitable for space-constrained applications. The package typically has 20 pins.

7. Thermal and Electrical Characteristics: The device is designed to operate over a wide temperature range, typically from -40°C to +125°C, making it suitable for industrial and automotive applications.

8. Applications: Common applications for the SN74AC573DW include data storage, temporary data holding in digital circuits, interfacing between different logic families, and as part of larger digital systems where data needs to be latched and controlled.

Summary:

The SN74AC573DW from Texas Instruments is a versatile and efficient octal transparent latch that provides high-speed data handling capabilities in a compact package. Its ability to interface with various logic levels and its robust performance make it a popular choice in digital circuit design.