Product Overview: CD74HC595E from Texas Instruments
The CD74HC595E is a high-speed CMOS device designed by Texas Instruments, a leader in semiconductor innovation. This integrated circuit is an 8-bit shift register with a storage register and 3-state outputs. The product is widely recognized for its robust functionality and versatility in a multitude of digital applications.
The device features an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register. Data is shifted on the positive-going transitions of the shift register clock input (SHCP). The data in the storage register appears at the output whenever the output enable input (OE) is LOW. A high on OE causes the outputs to assume a high-impedance OFF-state. Operation of the shift register is not affected by the OE input.
An important attribute of the CD74HC595E is its ability to directly drive LEDs or other displays, thanks to the 3-state output (8 mA output drive at 5V) which can interface with and drive TTL-level inputs. This makes it an excellent choice for expanding the output capabilities of microcontrollers, while minimizing the required I/O pins.
The serial output feature allows for cascading of multiple CD74HC595E devices, enabling the extension of serial communication to additional inputs or outputs. This daisy-chaining capability is particularly useful in applications requiring high-density I/O configurations, such as LED displays, digital control systems, and communication control interfaces.
The CD74HC595E operates over a wide voltage range from 2V to 6V and is characterized for operation from -55°C to 125°C, making it suitable for industrial applications. Its low power consumption and high noise immunity are compliant with the requirements of JEDEC standard no. 7A. The device is available in a 16-pin DIP package, ensuring easy integration into a variety of circuit boards and systems.
In summary, Texas Instruments' CD74HC595E is a highly functional and reliable component for applications requiring data storage, serial-to-parallel conversion, and an interface with high-drive outputs. Its ease of use, combined with the quality and support from Texas Instruments, makes it an essential part of any digital logic designer's toolkit.
