BU4015B

Shift Registers Overview

The BU4015B is a dual 4-bit static shift register from ROHM Semiconductor, belonging to the 4000/14000/40000 series. It comprises two independent circuits, each with four D flip-flops triggered by the rising edge of the clock input. The device features a common asynchronous reset input that forces all stage outputs to 'L' regardless of clock or data states. Operating within a supply voltage range of 3V to 18V, it supports direct driving of L-TTL and LS-TTL inputs. Available in DIP16 and SOP16 packages, it operates between -40°C and +85°C.

Shift Registers Feature Summary

• Dual 4-bit architecture with independent circuits sharing a common asynchronous reset function for immediate output clearing.
• High input impedance and high fan-out capabilities allowing direct interface with L-TTL and LS-TTL logic families.
• Wide operating power supply voltage range supporting diverse system requirements.
• Low power dissipation characteristics suitable for energy-efficient applications.

Shift Registers Applications

• Serial to parallel data conversion
• Ring counter configurations
• General-purpose shift register operations

Shift Registers Procurement Notes

Verify the specific package variant (DIP16 or SOP16) required for your PCB layout before ordering. Confirm that the supply voltage and temperature ranges align with your system's operational environment. Ensure compatibility with existing TTL logic levels if interfacing directly. Check for any recent lifecycle status updates as this component may be subject to discontinuation notices.

Shift Registers Selection Notes

Select the BU4015B when a dual-channel 4-bit shifting capability is needed with asynchronous reset functionality. It is suitable for designs requiring direct TTL compatibility without additional buffering. Consider the SOP16 package for surface-mount assembly or DIP16 for through-hole prototyping. Evaluate propagation delay specifications against your maximum clock frequency requirements.

Shift Registers Part Context

This component belongs to ROHM's standard High Voltage CMOS Logic ICs family, specifically the 4000/14000/40000 series. It shares functional similarities with other static shift registers like the BU4021B but offers a distinct dual 4-bit configuration. The device is designed for general electronic equipment such as office automation and communication devices, rather than safety-critical automotive or aerospace applications.

Shift Registers Replacement Considerations

Direct substitutes include the BU4015BF, which differs only in the package type (SOP16). Other compatible parts in the series include the BU4021B for 8-bit serial-to-parallel conversion needs.