The 74HC/LS165 is a high-performance 8-bit parallel-in, serial-out shift register IC designed for efficient data conversion and signal transmission in digital electronic systems. It integrates advanced High-Speed CMOS (HC) and Low-Power Schottky TTL (LS) technologies, delivering fast switching performance, low power consumption, and high noise immunity for reliable digital operation.
The LS version incorporates Schottky transistor technology to reduce propagation delay and improve switching speed, while the HC version provides ultra-low quiescent current and wide operating voltage compatibility from 2V to 6V. This voltage flexibility offers a clear advantage over conventional TTL-only shift register series, enabling better efficiency and easier integration in mixed-voltage digital environments.
With optimized internal architecture, the 74HC/LS165 ensures stable data capture, smooth parallel loading, and reliable serial output transmission, even in high-speed applications. It also delivers strong thermal stability and long-term operational reliability, making it suitable for industrial and embedded systems.
The device is available in both DIP and SOP package types, offering flexibility for prototyping, PCB assembly, and compact electronic designs.
Key Features
- 8-bit parallel-in, serial-out shift register
- Operating voltage: 2V to 6V (HC), 5V TTL compatible (LS)
- High-speed switching with low propagation delay
- Schottky TTL technology for faster response (LS version)
- Low power CMOS operation (HC version)
- High noise immunity and stable data transfer
- Available in DIP and SOP packages
- Excellent thermal stability and reliability
Applications
- Data acquisition and signal conversion systems
- Microcontroller I/O expansion
- Serial data transmission circuits
- Industrial automation and control systems
- LED display and indicator driving systems
- Digital communication and embedded systems
- General-purpose digital logic applications
