M74HC597B1R

Shift Registers Overview

The M74HC597B1R is an 8-bit parallel-in, serial-out (PISO) shift register with a storage latch, manufactured using high-speed silicon gate C2MOS technology. It operates within a supply voltage range of 2V to 6V and supports a maximum clock frequency of 50 MHz at 6V. The device features asynchronous reset and direct load inputs, positive edge-triggered clocks for both the storage and shift registers, and balanced propagation delays. It provides symmetrical output impedance with a minimum drive current of 4mA and includes protection circuits against static discharge.

Shift Registers Feature Summary

• Integrates an 8-bit storage latch feeding an 8-bit shift register with independent positive edge-triggered clocks.
• Features asynchronous clear and direct load inputs for flexible data control.
• Provides high noise immunity and symmetrical output impedance suitable for robust digital logic applications.

Shift Registers Applications

• Parallel-to-serial data conversion in communication interfaces
• Expanding I/O capabilities in microcontroller systems
• Digital signal processing and data buffering

Shift Registers Procurement Notes

Verify the specific package type required, as the M74HC597 family is available in DIP, SOP, and TSSOP configurations. Confirm that the B1R suffix corresponds to the Tube packaging format specified in the ordering codes. Ensure compatibility with the target system's voltage levels and temperature requirements before finalizing procurement.

Shift Registers Selection Notes

Select this component when an 8-bit PISO configuration with a dedicated storage latch is required. It is suitable for designs needing high-speed operation up to 50 MHz and wide voltage flexibility between 2V and 6V. Consider the pin count and package dimensions relative to the PCB layout constraints.

Shift Registers Part Context

This part belongs to the STMicroelectronics M74HC597 series of high-speed CMOS logic devices. It is functionally compatible with the standard 74HC597 architecture, ensuring interoperability with other components from various manufacturers that adhere to the same logical specifications and pinout definitions.

Shift Registers Replacement Considerations

Direct substitutes include the SN74HC597 from Texas Instruments or the CD74HC597 from Texas Instruments, which share identical logical functions and pinouts. Verify package compatibility and electrical characteristics such as propagation delay and drive current when cross-referencing alternative sources.

Shift Registers FAQ

What is the difference between the SCK and RCK inputs?

SCK is the Shift Clock input that advances data through the shift register stages on the rising edge. RCK is the Storage Clock input that transfers the data from the shift register to the storage latch outputs on the rising edge.

How does the SLOAD input function?

When SLOAD is active low, it loads the parallel data present on inputs A through H directly into the storage register, bypassing the shift register sequence.