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X9241USM Datasheet(PDF) 1 Page - Xicor Inc. |
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X9241USM Datasheet(HTML) 1 Page - Xicor Inc. |
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1 / 16 page  X9241 1 Quad E2POT™ Nonvolatile Digital Potentiometer © Xicor, Inc. 1994, 1995, 1996 Patents Pending Characteristics subject to change without notice 3864-2.7 7/1/96 T0/C3/D3 NS FEATURES • Four E2POTs 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 —2K Ω to 50KΩ Mask Programmable —Cascadable For Values of 500 Ω to 200KΩ • Resolution: 64 Taps each Pot • 20-Lead Plastic DIP, 20-Lead TSSOP and 20-Lead SOIC Packages X9241 DESCRIPTION The X9241 integrates four nonvolatile E2POT digitally controlled potentiometers on a monolithic CMOS micro- circuit. The X9241 contains four resistor arrays, each com- 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. FUNCTIONAL DIAGRAM Terminal Voltage ±5V, 64 Taps APPLICATION NOTES AND DEVELOPMENT SYSTEM A V AILABLE AN20 • AN42–48 • AN50–53 • AN73 • XK9241 3864 ILL F07.1 R0 R1 R2 R3 WIPER COUNTER REGISTER (WCR) RESISTOR ARRAY POT 1 VH1 VL1 VW1 R0 R1 R2 R3 WIPER COUNTER REGISTER (WCR) R0 R1 R2 R3 WIPER COUNTER REGISTER (WCR) RESISTOR ARRAY POT 2 VH2 VL2 VW2 R0 R1 R2 R3 WIPER COUNTER REGISTER (WCR) RESISTOR ARRAY POT 3 VH3 VL3 VW3 INTERFACE AND CONTROL CIRCUITRY SCL SDA A0 A1 A2 A3 VH0 VL0 VW0 DATA 8 |
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