CAT5271ZI-50-GT3 ON Semiconductor

CAT5271, CAT5273 2 Dual 256position I C Compatible Digital Potentiometers (POTs) The CAT5271 and CAT5273 are dual 256-position digital programmable linear taper potentiometers ideally suited for replacing CAT5271, CAT5273 A1 VCC Wiper Control VCC Wiper Control Register 1 Register 1 W1 W1 SCL SCL B1 B1 SDA SDA A2 Wiper Control Wiper Control Register 2 Register 2 W2 W2 Control Logic B2 B2 GND GND AD0 AD1 Figure 1. CAT5271 Functional Block Diagram Figure 2. CAT5273 Functional Block Diagram Table 1. PIN FUNCTION DESCRIPTION CAT5271 CAT5273 Pin No. Pin Name Description Pin Name Description 1 B1 B1 Terminal B1 B1 Terminal 2 A1 A1 Terminal AD0 Device Address Bit 0 3 W2 W2 Terminal W2 W2 Terminal 4 GND Digital Ground GND Digital Ground 5 VDD Positive Power Supply VDD Positive Power Supply 6 SCL Serial Clock Input SCL Serial Clock Input 7 SDA Serial Data Input / Output SDA Serial Data Input / Output 8 A2 A2 Terminal AD1 Device Address Bit 1 9 B2 B2 Terminal B2 B2 Terminal 10 W1 W1 Terminal W1 W1 Terminal Table 2. ABSOLUTE MAXIMUM RATINGS (Note 1) Rating Value Unit V to GND 0.3 to 6.5 V DD A1, B1, W1, A2, B2, W2 Voltage to GND V DD I 20 mA MAX Digital Inputs and Output Voltage to GND 0 to 6.5 V Operating Temperature Range 40 to +85 C Maximum Junction Temperature (T ) 150 C JMAX Storage Temperature 65 to +150 C Lead Temperature (Soldering, 10 sec) 300 C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. Maximum terminal current is bounded by the maximum current handling of the switches, maximum power dissipation of the package, and maximum applied voltage across any two of the A, B, and W terminals at a given resistance.