HEF4894BP,112 NXP

HEF4894B 12-stage shift-and-store register LED driver Rev. 8 22 November 2011 Product data sheet 1. General description The HEF4894B 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 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 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 DD SS (usually ground). Unused inputs must be connected to V , V , or another input. DD SS 2. Features and benefits Fully static operation 5 V, 10 V, and 15 V parametric ratings Standardized symmetrical output characteristics Specified from 40 C to +85 C and 40 C to +125 C Complies with JEDEC standard JESD 13-B 3. Ordering information Table 1. Ordering information All types operate from 40 C to +125 C. Type number Package Name Description Version HEF4894BP DIP20 plastic dual in-line package 20 leads (300 mil) SOT146-1 HEF4894BT SO20 plastic small outline package 20 leads body width 7.5 mm SOT163-1 HEF4894BTT TSSOP20 plastic thin shrink small outline package 20 leads body width 4.4 mm SOT360-1HEF4894B NXP Semiconductors 12-stage shift-and-store register LED driver 4. Functional diagram 31 CP STR QS1 11 QS2 12 QP0 4 QP1 5 QP2 6 2 D QP3 7 QP4 8 QP5 9 QP6 18 QP7 17 QP8 16 QP9 15 QP10 14 QP11 13 OE 19 001aai639 Fig 1. Logic Symbol 2 D 12 QS2 12-STAGE SHIFT REGISTER 3 CP 11 QS1 1 STR 12-BIT STORAGE REGISTER 19 OE OPEN-DRAIN OUTPUTS 45678918 17 16 15 14 13 QP0 QP2 QP4 QP6 QP8 QP10 QP1 QP3 QP5 QP7 QP9 QP11 001aag118 Fig 2. Functional diagram HEF4894B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Product data sheet Rev. 8 22 November 2011 2 of 19