Datasheet A6275 (Allegro) - 4

Serial-Input Constant-Current Latched LED Driver A6275 with Open LED Detection and Dot Correction
VDD VDD IN IN Dwg. EP-010-12 Dwg. EP-010-11 OUTPUT ENABLE (active low) LATCH ENABLE V VDD DD OUT IN Dwg. EP-063-6 Dwg. EP-010-13 L C O K C and SER L A I A T A D N I R E S I L A D T A A T U O
TRUTH TABLE Serial Shift Register Contents Serial Latch Latch Contents Output Output Contents Data Clock Data Enable Enable Input Input I1 I2 I3 ... IN-1 IN Output Input I1 I2 I3 ... IN-1 IN Input I1 I2 I3 ... IN-1 IN
H H R1 R2 ... RN-2 RN-1 RN-1 L L R1 R2 ... RN-2 RN-1 RN-1 X R1 R2 R3 ... RN-1 RN RN X X X ... X X X L R1 R2 R3 ... RN-1 RN P1 P2 P3 ... PN-1 PN PN H P1 P2 P3 ... PN-1 PN L P1 P2 P3 ... PN-1 PN X X X ... X X H H H H ... H H L = Low Logic (Voltage) Level H = High Logic (Voltage) Level X = Irrelevant P = Present State R = Previous State Allegro MicroSystems, Inc. 3 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com