onsemi CAT5261WI-00-T1

Digital Potentiometer (POT), Dual 256-Tap, with SPI Interface

Digital Potentiometer 256POS 100KOhm Dual 24-Pin SOIC T/R

Digital Potentiometer, 2 Func, 100000ohm, 3-wire Serial Control Interface, 256 Positions, CMOS, PDSO24

The CAT5261 is two Digitally Programmable Potentiometers (DPPs) integrated with control logic and 8 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 SPI serial bus. On power-up the contents of the first data register (DR0) for each of the potentiometers is automatically loaded into its respective wiper control register. The CAT5261 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 -40C to 85C industrial operating temperature range and offered in a 24-lead SOIC and TSSOP package.