HEF4894BT/Q100,118

Shift Registers Overview

The HEF4894BT-Q100,118 is a 12-stage serial shift register with storage latches for strobing data from serial input to parallel LED driver outputs. It operates on positive-going clock transitions and supports cascading via two serial outputs (QS1 and QS2). The device functions within a recommended supply voltage range of 3 V to 15 V. It is qualified to AEC-Q100 Grade 1 standards and specified for ambient temperatures between -40 °C and +125 °C.

Shift Registers Feature Summary

• Automotive qualification in accordance with AEC-Q100 Grade 1
• 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)

Shift Registers Applications

• Serial-to-parallel data converting LED drivers
• Automotive lighting control systems
• Cascaded display driver arrays

Shift Registers Procurement Notes

Verify the specific package variant required, as the HEF4894B-Q100 family includes both SO20 (SOT163-1) and TSSOP20 (SOT360-1) options. Confirm that the ordering suffix matches the desired physical footprint. Ensure design compliance with AEC-Q100 requirements if deployed in automotive environments. Check the latest product status documentation for any recent specification updates or revision changes.

Shift Registers Selection Notes

Select this component when a 12-bit shift-and-store register with open-drain outputs is required for LED driving applications. The dual serial outputs (QS1 and QS2) facilitate flexible cascading depending on clock rise times. Verify that the operating temperature range of -40 °C to +125 °C meets the environmental constraints of the target system.

Shift Registers Part Context

This part belongs to the Nexperia HEF4894B-Q100 series, which are 12-stage shift registers designed for automotive-grade reliability. The series complies with JEDEC standard JESD 13-B and offers parametric ratings at 5 V, 10 V, and 15 V. It is manufactured by Nexperia USA Inc., formerly NXP Semiconductors.

Shift Registers Replacement Considerations

HEF4894BTT-Q100,118 (TSSOP20 package equivalent)

Shift Registers FAQ

How does the device handle cascading with different clock speeds?

It provides two serial outputs: QS1 for fast clock rise times and QS2 for slow clock rise times, allowing flexible cascading configurations.

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

When OE is HIGH, data appears at the outputs. When OE is LOW, the outputs assume a high-impedance OFF-state without affecting the internal register state.