X9241 Datasheet | Xicor

FEATURES DESCRIPTION The X9241 integrates four nonvolatile E2POT digitally controlled potentiometers on a monolithic CMOS microcircuit. The X9241 contains four resistor arrays, each posed of 63 resistive elements. Between each element and at either end are tap points accessible to the wiper elements. The position of the wiper element on the array is controlled by the user through the two-wire serial bus interface. Each resistor array has associated with it a wiper counter register and four 8-bit data registers that can be directly written and read by the user. The contents of the wiper counter register control the position of the wiper on the resistor array. The data register may be read or written by the user. The contents of the data registers can be transferred to the wiper counter register to position the wiper. The current wiper position can be transferred to any one of its associated data registers. The arrays may be cascaded to form resistive elements with 127, 190 or 253 taps. - - - - - - - - - - Four in One Package Two-Wire Serial Interface Register Oriented Format - Directly Write Wiper Position - Read Wiper Position - Store as Many as Four Positions per Pot Instruction Format - Quick Transfer of Register Contents to Resistor Array - Cascade Resistor Arrays Low Power CMOS Direct Write Cell - Endurance - 100,000 Data Changes per Register - Register Data Retention - 100 years 16 Bytes of E2PROM memory 3 Resistor Array Values - 2KΩ to 50KΩ Mask Programmable - Cascadable For Values of 500Ω to 200KΩ Resolution: 64 Taps each Pot 20-Lead Plastic DIP, 20-Lead TSSOP and 20-Lead SOIC Packages E2POTs FUNCTIONAL DIAGRAM VH2 WIPER RESISTOR COUNTER ARRAY REGISTER POT 2 (WCR) R0 R1 WIPER COUNTER REGISTER (WCR) R2 R3 SCL SDA A0 A1 A2 A3 VH0 R0 R1 VL0 VW0 R2 R3 VL2 VW2 INTERFACE AND CONTROL CIRCUITRY 8 DATA R0 R1 VH1 WIPER COUNTER RESISTOR ARRAY REGISTER POT 1 (WCR) R0 R1 VH3 WIPER RESISTOR COUNTER ARRAY REGISTER POT 3 (WCR) R2 R3 VL1 VW1 R2 R3 VL3 VW3 3864 ILL...