onsemi CAT5251WI-00-T1

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

Digital Potentiometer 100kOhm 256POS Non-Volatile Linear 24-Pin SOIC T/R

Digital Potentiometer, 4 Func, 100000ohm, 3-wire Serial Control Interface, 256 Positions, PDSO24

IC DGT POT 100KOHM 256TAP 24SOIC

The CAT5251 is four Digitally Programmable Potentiometers (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 SPI 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 register. The CAT5251 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.