SN74HCT573DWRG4

The SN74HCT573DWRG4 is a high-speed, octal transparent latch designed by Texas Instruments. It is part of the HCT (High-speed CMOS TTL-compatible) family, which means it is compatible with TTL logic levels while offering the benefits of CMOS technology, such as lower power consumption and higher noise immunity.

Key Features:

1. Functionality: The SN74HCT573 is an octal latch, meaning it can store eight bits of data. It has a transparent mode, allowing data to pass through when the latch enable (LE) input is high. When LE is low, the data is latched, and the outputs hold the last state.

2. Inputs and Outputs: The device has eight data inputs (D0 to D7) and eight corresponding outputs (Q0 to Q7). The outputs are in a high-impedance state when the output enable (OE) is high, allowing for easy interfacing with other devices.

3. Control Pins:

   • Latch Enable (LE): Controls the latching of data. When LE is high, the outputs follow the inputs. When LE goes low, the outputs retain the last input state.
   • Output Enable (OE): When OE is low, the outputs are enabled and reflect the latched data. When OE is high, the outputs are in a high-impedance state.

4. Voltage Range: The SN74HCT573 operates over a wide voltage range, typically from 4.5V to 5.5V, making it suitable for various applications.

5. Speed: The device is designed for high-speed operation, with propagation delays typically around 15 ns at 5V, making it suitable for fast digital circuits.

6. Package Type: The SN74HCT573DWRG4 is available in a TSSOP (Thin Shrink Small Outline Package) with a 20-pin configuration, which is compact and suitable for space-constrained applications.

7. Temperature Range: It operates over a standard industrial temperature range of -40°C to 85°C, making it suitable for a variety of environments.

8. Applications: This latch is commonly used in data storage applications, temporary data holding, and as part of larger digital systems, such as microcontrollers and FPGAs.

Electrical Characteristics:

• Input High Voltage (VIH): Minimum of 2.0V
• Input Low Voltage (VIL): Maximum of 0.8V
• Output High Voltage (VOH): Minimum of 4.2V at 5V supply
• Output Low Voltage (VOL): Maximum of 0.5V at 5V supply
• Power Supply Current (ICC): Typically low, contributing to the overall efficiency of the device.

Conclusion:

The SN74HCT573DWRG4 is a versatile and efficient octal latch that combines the advantages of CMOS technology with TTL compatibility. Its high-speed performance, low power consumption, and robust design make it an excellent choice for a wide range of digital applications. Whether used in consumer electronics, industrial controls, or communication systems, this device provides reliable data storage and transfer capabilities.