74HC164D

The 74HC164D is a high-speed CMOS (Complementary Metal-Oxide-Semiconductor) shift register manufactured by Toshiba, part of the 74HC family of logic devices. This integrated circuit is designed for use in digital applications where data storage and transfer are required. Below is a detailed description of its features, specifications, and applications:

General Description:

The 74HC164D is an 8-bit serial-in, parallel-out shift register. It allows for the serial input of data, which can then be shifted through the register and output in parallel. This device is particularly useful for applications that require the conversion of serial data streams into parallel data formats.

Key Features:

• 8-Bit Shift Register: The device can store and shift 8 bits of data.
• Serial Input: Data is entered into the register one bit at a time through a single input pin.
• Parallel Output: The stored data can be accessed simultaneously from multiple output pins.
• High-Speed Operation: The 74HC164D operates at high speeds, making it suitable for fast digital circuits.
• Low Power Consumption: As a CMOS device, it consumes less power compared to traditional TTL (Transistor-Transistor Logic) devices.
• Wide Operating Voltage Range: Typically operates from 2V to 6V, allowing for flexibility in various applications.
• Directly Compatible with TTL: The device can interface with TTL logic levels, making it versatile for mixed-logic applications.

Pin Configuration:

The 74HC164D typically comes in a 16-pin dual in-line package (DIP) or surface-mount package. The pin configuration includes:

• Serial Data Input (DS): The pin where the serial data is fed into the register.
• Clock Input (CLK): The pin that triggers the shifting of data on the rising edge.
• Output Pins (Q0 to Q7): Eight output pins that provide the parallel output of the stored data.
• Reset Pin (MR): An active-low pin that resets the register, clearing all stored data.
• VCC and GND: Power supply and ground pins.

Electrical Characteristics:

• Propagation Delay: The time it takes for a change at the input to affect the output, typically in the nanosecond range.
• Input and Output Voltage Levels: Defined thresholds for high and low states, ensuring reliable operation in digital circuits.
• Maximum Output Current: The device can source or sink a specified amount of current per output pin, which is important for driving loads.

Applications:

The 74HC164D is widely used in various applications, including:

• Data Storage: Temporary storage of data in digital systems.
• Data Transfer: Converting serial data from microcontrollers or other devices into parallel data for further processing.
• LED Control: Driving multiple LEDs in a controlled manner by shifting data to control their states.
• Digital Signal Processing: Used in applications requiring manipulation of digital signals.

Conclusion:

The 74HC164D from Toshiba is a versatile and efficient shift register that plays a crucial role in digital electronics. Its ability to handle serial-to-parallel data conversion, combined with its high-speed performance and low power consumption, makes it an essential component in many modern electronic designs. Whether used in consumer electronics, industrial applications, or educational projects, the 74HC164D provides reliable and effective data handling capabilities.