1. General description

The HEF4894B-Q100 is a 12-stage serial shift register. It has a storage latch associated with

each stage for strobing data from the serial input (D) to the parallel LED driver outputs (QP0 to

QP11). Data is shifted on positive-going clock (CP) transitions. The data in each shift register stage

is transferred to the storage register when the strobe (STR) input is HIGH. Data in the storage

register appears at the output whenever the output enable (OE) input signal is HIGH.

Two serial outputs (QS1 and QS2) are available for cascading a number of HEF4894B-Q100

devices. Serial data is available at QS1 on positive-going clock edges to allow high-speed

operation in cascaded systems with a fast clock rise time. The same serial data is available at QS2

on the next negative going clock edge. This is used for cascading HEF4894B-Q100 devices when

the clock has a slow rise time.

It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually

ground). Unused inputs must be connected to VDD, VSS, or another input.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100

(Grade 1) and is suitable for use in automotive applications.

2. Features and benefits

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

• Specified from -40 °C to +85 °C and from -40 °C to +125 °C

• Wide supply voltage range from 3.0 V to 15.0 V

• CMOS low power dissipation

• High noise immunity

• Fully static operation

• 5 V, 10 V, and 15 V parametric ratings

• Standardized symmetrical output characteristics

• Complies with JEDEC standard JESD 13-B

• ESD protection:

• MIL-STD-833, method 3015 exceeds 2000 V

• HBM JESD22-A114F exceeds 2000 V

• MM JESD22-A115-B exceeds 200 V (C = 200 pF, R = 0 Ω)