NPIC6C4894

The NPIC6C4894 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 open-drain 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 latch enable (LE) input is HIGH. Data in the storage register drives the gate of the output extended-drain NMOS transistor whenever the output enable input (OE) is HIGH. A LOW on OE causes the outputs to assume a high-impedance OFF-state. Operation of the OE input does not affect the state of the registers. Two serial outputs (QS1 and QS2) are available for cascading a number of NIC6C4894 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. It is used for cascading NPIC6C4894 devices when the clock has a slow rise time. The open-drain outputs are 33 V/100 mA continuous current extended-drain NMOS transistors designed for use in systems that require moderate load power such as LEDs. Integrated voltage clamps in the outputs, provide protection against inductive transients. This protection makes the device suitable for power driver applications such as relays, solenoids and other low-current or medium-voltage loads.