STMicroelectronics M74HC164B1R 8-bit Serial-In Parallel-Out Shift Register

The M74HC164B1R is a high-speed CMOS 8-bit serial-in/parallel-out shift register designed and manufactured by STMicroelectronics. This integrated circuit (IC) is part of the HC family, which means it is fabricated using silicon gate CMOS technology, ensuring high speed, low power consumption, and a robust interface capability.

With its two serial data inputs (A and B), the M74HC164B1R allows for serial data entry in a variety of configurations. It features eight parallel data outputs (Q0 to Q7) that present the data in a non-inverted form. This makes the device ideal for expanding the word length of a data path or for controlling a large number of outputs with a minimal number of I/O pins on a microcontroller.

The clock input is the driving force for the internal flip-flops, with the edge-triggered feature ensuring that data is shifted on the rising edge of the clock pulse. This precise timing allows for reliable data transfer in high-speed digital systems. The clear function is asynchronous, and when activated, it resets the internal registers, setting all outputs to a low state.

One of the key advantages of the M74HC164B1R is its wide operating voltage range, from 2V to 6V, which makes it compatible with TTL levels and suitable for use in a variety of logic circuits. Its high noise immunity and low power consumption are characteristics of the CMOS technology, which also ensures that the device is suitable for battery-operated devices.

The M74HC164B1R is available in a variety of packages, including the DIP, SO, and TSSOP, providing flexibility for different PCB designs and space requirements. Its operating temperature range from -55°C to +125°C guarantees reliability across a broad spectrum of environmental conditions.

Overall, the M74HC164B1R from STMicroelectronics is a versatile and reliable component for applications requiring serial-to-parallel data conversion, such as in digital systems, instrumentation, and automation. Its compatibility with other logic families through its input switching levels makes it a convenient choice for designers looking to integrate it into mixed-technology systems.