SN74ACT573NSR

The SN74ACT573NSR is a high-speed octal transparent latch designed by Texas Instruments, part of their 74ACT family of logic devices. This component is particularly useful in digital circuits where temporary data storage is required, such as in data buffering and interfacing applications.

Key Features:

1. Functionality: The SN74ACT573 is an octal latch, meaning it can store eight bits of data. It operates in a transparent mode, allowing data to pass through when the latch enable (LE) signal is active. When LE is low, the data is latched and held until LE is activated again.

2. Input and Output: 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 Signals: The latch is controlled by two primary signals:

   • Latch Enable (LE): When this signal is high, the outputs follow the inputs. When low, the outputs retain their last state.
   • Output Enable (OE): This signal controls the output state. When OE is low, the outputs are enabled and reflect the latched data. When high, the outputs are in a high-impedance state, effectively disconnecting them from the circuit.

4. Voltage Levels: The SN74ACT573 operates with a supply voltage range of 4.5V to 5.5V, making it compatible with standard TTL and CMOS logic levels.

5. Speed: The device is designed for high-speed operation, with propagation delays typically around 5 ns at a 5V supply, making it suitable for fast data processing applications.

6. Package Type: The SN74ACT573NSR is available in a surface-mount SOIC (Small Outline Integrated Circuit) package, which is compact and ideal for modern PCB designs. The "NSR" suffix indicates that it is a reel of surface-mount devices, suitable for automated assembly processes.

7. Temperature Range: The device is rated for operation over a temperature range of -40°C to +125°C, making it suitable for a variety of industrial and automotive applications.

8. Applications: Common applications include data storage in microcontrollers, interfacing between different logic families, and temporary data holding in digital signal processing.

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 a load of 2 mA
• Output Low Voltage (VOL): Maximum of 0.5V at a load of 2 mA
• Power Dissipation: Low power consumption, typically around 0.5 mA per input.

Summary:

The SN74ACT573NSR is a versatile and efficient octal latch that provides high-speed data storage and transfer capabilities in digital circuits. Its combination of speed, low power consumption, and robust performance makes it an excellent choice for a wide range of electronic applications.