8-bit serial to parallel shift registers in compact 14-pin packages
Manufacturer： ti
# SNJ54HC164J Product Series Introduction
## 1. Overview
The SNJ54HC164J belongs to a specialized product series within the realm of integrated circuits. It is a high - speed CMOS device that combines the advantages of low power consumption and high - performance operation. This series is designed to meet the requirements of various digital systems, offering reliable and efficient data handling capabilities.
## 2. Key Features
### 2.1 High - Speed Operation
The SNJ54HC164J is built with advanced CMOS technology, which enables it to operate at high speeds. It can handle clock frequencies up to a certain limit (specific frequency details can be found in the detailed datasheet), making it suitable for applications where rapid data transfer and processing are essential. This high - speed operation allows for seamless integration into systems that require real - time data handling, such as high - speed communication interfaces and fast - paced digital control circuits.
### 2.2 Low Power Consumption
One of the significant advantages of this product series is its low power consumption. CMOS technology inherently consumes less power compared to other logic families. This makes the SNJ54HC164J an ideal choice for battery - powered devices or systems where power efficiency is a critical concern. By reducing power consumption, it not only extends the battery life of portable devices but also helps in minimizing heat generation, which can enhance the overall reliability and longevity of the system.
### 2.3 Wide Operating Voltage Range
The SNJ54HC164J can operate over a relatively wide voltage range. This flexibility allows it to be used in different power supply environments. Whether it is a low - voltage system for energy - efficient applications or a higher - voltage system for more robust operation, this device can adapt accordingly. The wide voltage range also provides compatibility with a variety of other components in the system, simplifying the design process.
### 2.4 Schmitt - Trigger Inputs
The inputs of the SNJ54HC164J are equipped with Schmitt - trigger characteristics. Schmitt - trigger inputs have hysteresis, which means they can tolerate a certain amount of noise on the input signals. This feature makes the device more immune to electrical noise and interference, ensuring stable and reliable operation even in noisy environments. It helps in preventing false triggering and improves the overall signal integrity of the system.
## 3. Functional Description
### 3.1 Serial - to - Parallel Conversion
The primary function of the SNJ54HC164J is serial - to - parallel conversion. It takes a serial data input and converts it into an 8 - bit parallel output. This is achieved through a shift register mechanism. The serial data is shifted into the register on each rising edge of the clock signal. As the clock pulses are applied, the data moves through the register, and after 8 clock cycles, the complete 8 - bit data is available at the parallel output pins.
### 3.2 Data Input and Control
The device has two serial data inputs (A and B). These inputs can be used in different ways depending on the application requirements. The data at these inputs is ANDed together before being shifted into the register. There is also a clear (CLR) input, which, when activated (usually low - active), clears the contents of the shift register, resetting all the output pins to a low state.
### 3.3 Output Configuration
The 8 - bit parallel output of the SNJ54HC164J is available at the Q0 - Q7 pins. These outputs can drive standard TTL loads, which means they can be directly connected to other TTL - compatible components in the system. The output pins can be used to control external devices such as LEDs, relays, or other digital circuits.
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