74HC165D,653

The 74HC165D,653 is an 8-bit parallel-in/serial-out shift register from NXP Semiconductors, part of the 74HC family of high-speed CMOS logic devices. This component is designed for efficient data handling and is commonly used in applications where parallel data needs to be converted into a serial format for easier transmission or processing.

Key Features:

1. 8-Bit Shift Register: The device can accept 8 bits of parallel data input, which can then be shifted out serially. This is particularly useful for applications where the number of input pins is limited.

2. Parallel Data Input: The 74HC165D allows for simultaneous loading of data on its parallel input pins (D0 to D7). This feature enables quick data acquisition from multiple sources.

3. Serial Output: The output is provided in a serial format, which can be easily interfaced with microcontrollers or other digital devices that require serial data input.

4. Clock Control: The device includes a clock input (CLK) that controls the shifting of data. On each clock pulse, the data is shifted out one bit at a time, starting from the least significant bit (LSB).

5. Load Control: The LOAD pin allows the user to load the parallel data into the shift register. When this pin is activated, the data present at the parallel inputs is captured and stored in the register.

6. Reset Functionality: The RESET pin can be used to clear the contents of the shift register, setting all output bits to zero. This is useful for initializing the device before operation.

7. High-Speed Operation: The 74HC165D operates at high speeds, making it suitable for applications requiring fast data processing. It can handle clock frequencies up to 25 MHz.

8. Wide Supply Voltage Range: The device operates over a supply voltage range of 2V to 6V, making it versatile for various applications.

9. Low Power Consumption: As a CMOS device, it features low static power consumption, which is beneficial for battery-operated devices.

10. Package Type: The 74HC165D,653 is typically available in a DIP (Dual In-line Package) or SOIC (Small Outline Integrated Circuit) package, making it easy to integrate into various circuit designs.

Applications:

• Data Acquisition Systems: Ideal for collecting data from multiple sensors or inputs and converting it into a serial format for processing.
• Microcontroller Interfacing: Useful in applications where a microcontroller needs to read multiple digital inputs but has limited I/O pins.
• LED Control: Can be used to control multiple LEDs with fewer output pins by shifting data to control the state of each LED.
• Communication Interfaces: Suitable for creating communication links between devices by serializing data for transmission.

Electrical Characteristics:

• Input Voltage Levels: The device recognizes standard logic levels, ensuring compatibility with other TTL and CMOS devices.
• Propagation Delay: The typical propagation delay for the clock signal is low, allowing for quick data shifting and processing.

In summary, the 74HC165D,653 from NXP Semiconductors is a versatile and efficient 8-bit shift register that provides a practical solution for converting parallel data to serial format, making it an essential component in various digital applications.