SN54LS164

The SN54LS164 is a high-speed, low-power, 8-bit serial-in, parallel-out shift register designed for use in digital circuits. It is part of the Texas Instruments' 54 series, which is known for its military-grade reliability and robustness. The device is constructed using bipolar technology, which allows for fast switching speeds and low power consumption, making it suitable for a variety of applications in both commercial and military environments.

Key Features:

1. 8-Bit Shift Register: The SN54LS164 can store and shift 8 bits of data, making it ideal for applications that require serial data input and parallel data output.

2. Serial Input: Data is entered into the register serially, one bit at a time, through the serial input pin (DS). This allows for efficient data handling in systems where data is received in a serial format.

3. Parallel Output: The device provides 8 parallel outputs (Q0 to Q7), allowing the stored data to be accessed simultaneously. This feature is particularly useful for applications that require quick access to multiple bits of data.

4. Clock Control: The SN54LS164 includes a clock input (CLK) that controls the timing of data shifting. On each rising edge of the clock signal, the data present at the serial input is shifted into the register, and the existing data is shifted to the next output.

5. Asynchronous Reset: The device features an active-low reset pin (MR) that allows for the immediate clearing of the register, setting all outputs to a low state. This is useful for initializing the register to a known state.

6. Low Power Consumption: The SN54LS164 is designed to operate with low power, making it suitable for battery-operated devices and applications where power efficiency is critical.

7. Wide Operating Voltage Range: The device typically operates within a voltage range of 4.75V to 5.25V, making it compatible with standard TTL logic levels.

8. Temperature Range: As a military-grade component, the SN54LS164 is rated for operation over an extended temperature range, typically from -55°C to +125°C, ensuring reliability in harsh environments.

9. Package Options: The SN54LS164 is available in various package types, including dual in-line packages (DIP) and surface mount options, allowing for flexibility in design and integration into different circuit layouts.

Applications:

The SN54LS164 is commonly used in applications such as:

• Data storage and transfer in digital systems
• Shift registers in communication systems
• Control systems requiring serial-to-parallel data conversion
• LED display drivers where data needs to be shifted in and displayed in parallel
• Digital signal processing applications

Conclusion:

The SN54LS164 from Texas Instruments is a versatile and reliable shift register that provides efficient data handling capabilities in a compact form factor. Its combination of high-speed operation, low power consumption, and military-grade reliability makes it an excellent choice for a wide range of digital applications.