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CAT5221CATN/a1000avaiDual 64-Tap DPP with 2-Wire Interface


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CAT5221
Dual 64-Tap DPP with 2-Wire Interface
CAT5221
Dual Digital
Potentiometer (POT)
with 64 T aps
and I2 C Interface
Description

The CAT5221 is two digital POTs integrated with control logic and
16 bytes of NVRAM memory. Each digital POT consists of a series of
63 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 6-bit control
register (WCR) independently controls the wiper tap switches for each
digital POT. Associated with each wiper control register are four 6-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 I2 C 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 (WCR).
The CAT5221 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.
Features
Two Linear-taper Digital Potentiometers 64 Resistor Taps per Potentiometer End to End Resistance 2.5 k�, 10 k�, 50 k� or 100 k� Potentiometer Control and Memory Access via I2 C Interface Low Wiper Resistance, Typically 80 � 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 �A 1,000,000 Nonvolatile WRITE Cycles 100 Year Nonvolatile Memory Data Retention 20-lead SOIC and TSSOP Packages Industrial Temperature Range These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
ic,good price


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