DESCRIPTIONPin No.Pin Name Description1WPMemory Write Protect: Active Low 2SCL Serial Clock 3SDA Serial Data 4GNDGround5RWWiper Terminal6RLPotentiometer Low Terminal7RHPotentiometer High Terminal8V CCSupply VoltageWP: Write Protect InputThe WP pin when tied low prevents any write operationswithin the device.SCL: Serial ClockThe CAT5140 serial clock input pin is used to clock alldata transfers into or out of the device.SDA: Serial DataThe CAT5140 bidirectional serial data pin is used totransfer data into and out of the device. The SDA pin is anopen drain output and can be wire-Ored with the other open drain or open collector I/Os. RH, RL : Resistor End PointsThe set of RH and RL pins is equivalent to the terminalconnections on a mechanical potentiometer.RW: WiperThe RW pin is equivalent to the wiper terminal of amechanical potentiometer and its position is controlled bythe WR register.Table 3. ABSOLUTE MAXIMUM RATINGSParameterRatingUnitV IN Supply Voltage VCC to Ground (Note 1)0.5 to +7 Features 400 kHz I 2 C Compatible Interface 256 Position Linear Taper Potentiometer End to End Resistance = 50 k / 100 k TCR = 100 ppm/ C (typical) Standby Current = 2 A (max) Typical Wiper Resistance = 70 @ 3.3 V Operating Voltage = 2.5 V to 5.5 V 6 Registers 8 bit Non volatile EEPROM 2,000,000 Data Write Stores 100 Year Data Retention 8 Lead MSOP Package Pb free RoHS Compliant: NiPdAu Plating Figure 1. Functional Block Diagram VCCRHRLRWSCLSDAGNDNonVolatileACRWIPERIVRGPGPGPI2C andCONTROLVolatilehttp://onsemi.comPIN CONNECTIONSRWRLRHVCCGNDSDASCLWP1(Top View)See detailed ordering and shipping information in the packagedimensions section on page 2 of this data sheet.ORDERING INFORMATIONMSOP8 3x3 Z SUFFIXCASE 846AD ABTV = 100 k Resistance ABTJ = 50 k ResistanceY = Production YearY = (Last Digit) M = Production Month M = (1 9, A, B, C) X = Production Revision ABTVYMXMARKING DIAGRAM1ABTJYMX1CAT5140http://onsemi.com2Table 1. ORDERING INFORMATIONPart NumberResistanceTemperature Range PackageS specifications, including part orientation and