74HC4094D,652

Shift Registers Overview

The Nexperia 74HC4094D,652 is an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs. It operates within a supply voltage range of 2.0 V to 6.0 V and supports ambient temperatures from -40 °C to +125 °C. The device features separate clocks for the shift and storage registers, along with two serial outputs (QS1 and QS2) for cascading. Inputs include clamp diodes to allow interfacing with voltages exceeding VCC using current limiting resistors.

Shift Registers Feature Summary

• Provides serial-to-parallel data conversion capabilities through its 8-stage shift-and-store architecture.
• Features 3-state outputs controlled by an output enable input to manage bus loading.
• Includes ESD protection compliant with JEDEC standards for robust operation.

Shift Registers Applications

• Serial-to-parallel data conversion
• Remote control holding register

Shift Registers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure compatibility with system voltage levels and interface requirements before procurement. Confirm that the component meets all necessary regulatory compliance standards for the intended application environment.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with independent storage and shift clocking is required. Consider the 3-state output capability for bus applications. Verify that the CMOS input levels are compatible with the driving logic family in the design.

Shift Registers Part Context

This part belongs to the 74HC/HCT logic family, designed for high-speed CMOS operations. It is manufactured by Nexperia USA Inc. and is available in various packages including SO16, SSOP16, and TSSOP16. The datasheet revision history indicates ongoing updates to comply with industry standards.

Shift Registers Replacement Considerations

Check for equivalent parts from other manufacturers that meet the same electrical specifications and pinout configuration. Ensure any substitute component supports the required operating voltage range and temperature specifications.

Shift Registers FAQ

How does the 74HC4094 handle cascading?

It features two serial outputs, QS1 and QS2, which allow for cascading to extend the number of bits. QS1 provides data on the LOW-to-HIGH transition of the clock, while QS2 provides it on the HIGH-to-LOW transition.

What is the function of the STR input?

The STR (strobe) input transfers the data stored in the shift register to the storage register when set to HIGH. This allows the parallel outputs to update independently of the shifting process.