HEF4794BT,112 Nexperia

HEF4794B 8-stage shift-and-store register LED driver Rev. 10 6 January 2022 Product data sheet 1. General description The HEF4794B is an 8-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 QP7). Data is shifted on the positive-going clock (CP) transitions. The data in each shift register stage is transferred to the storage register when the strobe input (STR) is HIGH. Data in the storage register appears at the outputs whenever the output enable input (OE) signal is HIGH. Two serial outputs (QS1 and QS2) are available for cascading a number of HEF4794B 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 HEF4794B devices when the clock has a slow rise time. It operates over a recommended V power supply range of 3 V to 15 V referenced to V (usually DD SS ground). Unused inputs must be connected to V , V , or another input. DD SS 2. Features and benefits 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: HBM JESD22-A114F exceeds 2000 V MM JESD22-A115-A exceeds 200 V Specified from -40 C to +85 C and -40 C to +125 CNexperia HEF4794B 8-stage shift-and-store register LED driver 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version HEF4794BT -40 C to +125 C SO16 plastic small outline package 16 leads SOT109-1 body width 3.9 mm 4. Functional diagram 3 1 CP STR QS1 9 QS2 10 2 D QP0 4 10 8-STAGE SHIFT QS2 3 REGISTER 5 QP1 CP 9 QS1 QP2 6 2 D 1 QP3 7 8-BIT STORAGE STR REGISTER QP4 14 QP5 13 15 OPEN-DRAIN QP6 12 OE OUTPUTS QP7 11 4 5 6 7 14 13 12 11 OE QP0 QP2 QP4 QP6 QP1 QP3 QP5 QP7 15 001aaf111 001aag798 Fig. 1. Logic symbol Fig. 2. Functional diagram STAGE 0 STAGES 1 TO 6 STAGE 7 D D Q D Q D Q QS1 CP CP D Q QS2 FF 0 FF 7 CP CP LE LATCH D Q D Q LE LE LATCH 0 LATCH 7 STR OE QP0 QP2 QP4 QP6 aaa-029301 QP1 QP3 QP5 QP7 Fig. 3. Logic diagram HEF4794B All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2022. All rights reserved Product data sheet Rev. 10 6 January 2022 2 / 14