CAT5137

CAT5136, CAT5137, CAT5138 Digital Potentiometers (POTs) with 128 Taps and I2C Interface Description CAT5136, CAT5137, and CAT5138 are a family of digital POTs operating like mechanical potentiometers in various configurations. The tap points between the 127 equal resistive elements are connected to the wiper output via CMOS switches. The switches are controlled by a 7-bit Wiper Control Register (WCR) via the I2C serial bus. CAT5136 is configured as a variable resistor. CAT5137 and CAT5138 are resistive voltage dividers, with one terminal of the potentiometer connected to GND. CAT5137 and CAT5138 have different device IDs, which makes it possible to use both on the same I2C bus. Upon power-up, the WCR is set to mid-scale (1000000). Features  Single Linear Digital Potentiometer with 128 Taps  End-to-End Resistance of 10 kW, 50 kW and 100 kW  I2C Interface  Wiper goes to Midscale at Power-up  Digital Supply Range (VDD): 2.7 V to 5.5 V  Low Standby Current  Industrial Temperature Range: −40C to +85C  6-pin SC−70 Package  These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant Typical Applications  LCD Screen Adjustment  Volume Control  Mechanical Potentiometer Replacement  Gain Adjustment  Line Impedance Matching  VCOM Setting Adjustments http://onsemi.com SC−70 SD SUFFIX CASE 419AD PIN CONNECTIONS (for low pin count devices) VDD 1 6 RL GND 2 5 RW SCL 3 4 SDA CAT5136 VDD 1 6 RH GND 2 5 RW SCL 3 4 SDA CAT5137 CAT5138 (Top Views) ...