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CAT5269WI-00 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT5269WI-00 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 16 page CAT5269 © Catalyst Semiconductor, Inc. 1 Doc. No. MD-2123 Rev. C Characteristics subject to change without notice Dual Digitally Programmable Potentiometers (DPP™) with 256 Taps and 2-wire Interface FEATURES Four linear taper digitally programmable potentiometers 256 resistor taps per potentiometer End to end resistance 50kΩ or 100kΩ Potentiometer control and memory access via 2-wire interface (I 2C like) Low wiper resistance, typically 100Ω 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 1µA 1,000,000 nonvolatile WRITE cycles 100 year nonvolatile memory data retention 24-lead SOIC and 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 NC 3 22 NC NC 4 21 NC NC 5 20 NC NC 6 19 NC VCC 7 18 GND RLO 8 17 RW1 RHO 9 16 RH1 RWO 10 15 RL1 A2 11 14 A1 WP ¯¯¯ 12 13 SDA DESCRIPTION The CAT5259 is two digitally programmable poten– tiometers (DPPs™) integrated with control logic and 18 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 2-wire 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 -40ºC to 85ºC industrial operating temperature ranges and offered in a 24-lead SOIC and TSSOP package. FUNCTIONAL DIAGRAM RW0 RW1 RH0 A1 A2 A0 A3 RH1 RL0 RL1 NONVOLATILE DATA REGISTERS WIPER CONTROL REGISTERS CONTROL LOGIC 2-WIRE BUS INTERFACE WP SCL SDA |
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