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CAT5259WI00 Datasheet(PDF) 1 Page - ON Semiconductor |
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CAT5259WI00 Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 16 page CAT5259 © 2009 SCILLC. All rights reserved. 1 Doc. No. MD-2000 Rev. J Characteristics subject to change without notice NONVOLATILE DATA REGISTERS CONTROL LOGIC WIPER CONTROL REGISTERS I²C BUS INTERFACE RW0 RW1 RW2 RW3 RL0 A0 A1 SCL SDA A2 A3 RL1 RL2 RL3 RH0 RH1 RH2 RH3 WP Quad Digitally Programmable Potentiometers (DPP™) with 256 Taps and I²C Interface FEATURES Four linear taper digitally programmable potentiometers 256 resistor taps per potentiometer End to end resistance 50 kΩ or 100 kΩ Potentiometer control and memory access via I²C interface Low wiper resistance, typically 100 Ω Nonvolatile memory storage for up to four wiper settings for each potentiometer Automatic recall of saved wiper settings at power up 2.5 to 6.0 volt operation Standby current less than 1 µA 1,000,000 nonvolatile WRITE cycles 100 year nonvolatile memory data retention 24-lead SOIC and 24-lead TSSOP packages Industrial temperature range For Ordering Information details, see page 15. PIN CONFIGURATION SOIC (W) TSSOP (Y) NC 1 24 A3 A0 2 23 SCL RW3 3 22 RL2 RH3 4 21 RH2 RL3 5 20 RW2 NC 6 19 NC VCC 7 18 GND RLO 8 17 RW1 RHO 9 16 RH1 RWO 10 15 RL1 A2 11 14 A1 12 13 SDA DESCRIPTION The CAT5259 is four digitally programmable poten– tiometers (DPPs™) integrated with control logic and 16 bytes of NVRAM memory. Each DPP consists of a series of resistive elements connected between two externally accessible end points. The tap points between each resistive element are connected to the wiper outputs with CMOS switches. A separate 8-bit control register (WCR) independently controls the wiper tap switches for each DPP. Associated with each wiper control register are four 8-bit non-volatile memory data registers (DR) used for storing up to four wiper settings. Writing to the wiper control register or any of the non-volatile data registers is via a I²C serial bus. On power-up, the contents of the first data register (DR0) for each of the four potentiometers is automatically loaded into its respective wiper control registers. The CAT5259 can be used as a potentiometer or as a two terminal, variable resistor. It is intended for circuit level or system level adjustments in a wide variety of applications. It is available in the 0ºC to 70ºC commercial and -40ºC to 85ºC industrial operating temperature ranges and offered in a 24-lead SOIC and TSSOP package. FUNCTIONAL DIAGRAM |
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