74LS165ADR 8-Bit Parallel-Load Shift Registers

The 74LS165ADR is a high-performance, 8-bit shift register produced by Texas Instruments, a leader in semiconductor design and manufacturing. This integrated circuit is part of the 74LS logic family, known for its low-power Schottky technology. The 74LS165ADR is designed to interface directly with the system bus of a microprocessor and is optimized for high-speed data transfer and manipulation.

This device features parallel inputs, serial outputs, and synchronous operation. The parallel-load capability allows the register to receive data on all eight bits simultaneously, making it ideal for interfacing with parallel data sources. Once loaded, the data can be shifted out serially for further processing or communication with other digital systems.

The 74LS165ADR operates with a typical shift frequency of 25 MHz, which makes it suitable for high-speed applications. It is implemented in a small-outline package, which minimizes space on printed circuit boards and is particularly beneficial in space-constrained applications.

Key features of the 74LS165ADR include:

• Direct overriding clear (Master Reset) input which clears the register
• Serial data output for cascading multiple devices in serial shift register applications
• Parallel inputs for loading data directly into the register
• Complementary outputs providing both true and inverted data
• Edge-triggered clocking which ensures reliable and synchronous data transfer
• Two clock inputs, one for shift register clock and another for shift/load control
• Wide operating voltage range of 4.75V to 5.25V
• Low power consumption characteristic of the 74LS series

The 74LS165ADR is widely used in digital systems where data needs to be collected from sensors, switches, or other input devices and then transmitted serially to a microcontroller or another part of the digital system. Its robust design and reliable performance make it a preferred choice for applications such as data acquisition systems, digital signal processing, and communication interfaces.

With Texas Instruments' commitment to quality and long-term availability, the 74LS165ADR is a dependable component for both new designs and legacy systems requiring an 8-bit parallel-load shift register.