HEF4094BTTJ

Shift Registers Overview

The HEF4094BTTJ is an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs, manufactured by Nexperia. It operates within a supply voltage range of 3.0 V to 15.0 V and supports ambient temperatures from -40 °C to +125 °C. The device utilizes TSSOP-16 (SOT403-1) packaging. Data shifts on positive-going clock transitions, with separate clocks for the shift and storage registers. It features two serial outputs (QS1 and QS2) for cascading, accommodating both fast and slow clock rise times.

Shift Registers Feature Summary

• Fully static operation with CMOS low power dissipation
• High noise immunity and standardized symmetrical output characteristics
• ESD protection exceeding 2000 V (HBM) and 1000 V (CDM)
• Inputs include clamp diodes for interfacing voltages in excess of VDD

Shift Registers Applications

• Serial-to-parallel data conversion
• Remote control holding register
• Digitally controlled equipment

Shift Registers Procurement Notes

Verify the specific ordering suffix 'J' against official Nexperia documentation to confirm tape-and-reel specifications and compliance details. Ensure the selected package variant matches the required PCB footprint dimensions for SOT403-1. Confirm that the application environment remains within the specified -40 °C to +125 °C operating temperature range and does not exceed the absolute maximum ratings defined in the datasheet.

Shift Registers Selection Notes

Select this component when an 8-stage shift-and-store register with 3-state outputs is required. The dual serial outputs (QS1/QS2) facilitate cascading across varying clock edge speeds. Verify compatibility with the target logic family voltage levels and ensure the TSSOP-16 package fits the design constraints. Consider the dynamic power dissipation formula for high-frequency applications.

Shift Registers Part Context

The HEF4094BTTJ belongs to the HEF4094B series, part of the broader HEF4000 CMOS logic family. This series provides standardized symmetrical output characteristics compliant with JEDEC standard JESD 13-B. The 'TT' designation indicates the TSSOP-16 plastic thin shrink small outline package, while 'J' typically denotes reel packaging configuration.

Shift Registers Replacement Considerations

HEF4094BT,653

Shift Registers FAQ

How does the device handle cascading with different clock rise times?

Data is available at QS1 on the LOW-to-HIGH transition for fast clock edges, and at QS2 on the next HIGH-to-LOW transition for slow clock edges.

What is the function of the Output Enable (OE) input?

A LOW on OE causes the outputs to assume a high-impedance OFF-state. Operation of OE does not affect the state of the internal registers.