CAT5221 Dual Digital Potentiometer (POT), 64-Tap, 2 with I C Interface CAT5221 MARKING DIAGRAMS (SOIC20) (TSSOP20) L3B CAT5221WT RLB RRYMXXXX CAT5221YI 3YMXXX L = Assembly Location 3 = Lead Finish MatteTin B = Product Revision (Fixed as B) R = Resistance CAT = Fixed a CAT 5 = 100 K Ohms 5221W = Device Code 4 = 50 K Ohms T = Temperature Range 2 = 10 K Ohms I = Industrial 1 = 2.5 K Ohms A = Automobile L = Assembly Location E = Extended B = Product Revision (Fixed as B) B = Leave blank if Commercial CAT5221Y = Device Code = Dash I = Temperature Range (I = Industrial) RR = Resistance 3 = Lead Finish MatteTin 25 = 2.5 K Ohms Y = Production Year (Last Digit) 10 = 10 K Ohms M = Production Month (19, O, N, D) 50 = 50 K Ohms XXX = Last Three Digits of Assembly Lot Number 00 = 100 K Ohms Y = Production Year (Last Digit) M = Production Month (19, O, N, D) XXXX = Last Four Digits of Assembly Lot Number R R H0 H1 SCL WIPER 2 I C CONTROL INTERFACE REGISTERS R SDA W0 R W1 A0 NONVOLATILE A1 CONTROL DATA A2 LOGIC REGISTERS A3 R R L0 L1 Figure 1. Functional Diagram