CAT5261 Dual Digital Potentiometer (POT) with 256 Taps and SPI Interface CAT5261 MARKING DIAGRAMS (SOIC24) (TSSOP24) L3B RLB CAT5261WT CAT5261YI RRYMXXXX 3YMXXX L = Assembly Location R = Resistance 3 = Lead Finish Matte-Tin 1 = 2.5 K B = Product Revision (Fixed as B) 2 = 10 K CAT = Fixed as CAT 4 = 50 K 5261W = Device Code 5 = 100 K T = Temperature Range (I = Industrial) L = Assembly Location = Dash B = Product Revision (Fixed as B) RR = Resistance CAT5261Y = Device Code 25 = 2.5 K I = Temperature Range (I = Industrial) 10 = 10 K 3 = Lead Finish Matte-Tin 50 = 50 K Y = Production Year (Last Digit) 00 = 100 K M = Production Month (19, O, N, D) Y = Production Year (Last Digit) XXX = Last Three Digits of Assembly Lot Number M = Production Month (1-9, O, N, D) XXXX = Last Four Digits of Assembly Lot Number R R H0 H1 CS WIPER SPI BUS SCK CONTROL SI INTERFACE R W0 REGISTERS SO R W1 WP NONVOLATILE A0 CONTROL DATA A1 LOGIC REGISTERS HOLD R R L0 L1 Figure 1. Functional Diagram