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CAT5251: Digital Potentiometer (POT), Quad 256-Tap, with SPI Interface

Datasheet: Digital Potentiometer (POT), Quad 256-Tap, with I2C Interface
Rev. 9 (202.0kB)
Product Overview
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The CAT5251 is four digital POTs integrated with control logic and 16 bytes of NVRAM memory. Each digital POT 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 digital POT. 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 -40°C to 85°C industrial operating temperature range.
Features
 
  • Four linear-taper digital potentiometers
  • 256 resistor taps per potentiometer
  • End to end resistance 50 kΩ or 100 kΩ
  • Potentiometer control and memory access via SPI 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
  • Industrial temperature range
Applications   End Products
  • Audio Equipment
  • Industrial Controls
 
  • Automobiles
  • Industrial Equipment
Technical Documentation & Design Resources
Tutorials (1) Package Drawings (1)
Data Sheets (1)  
Availability & Samples
Specifications
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
CAT5251YI-00-T2 Active
Pb-free
Halide free
CAT5251 TSSOP-24 948AR 1 260 Tape and Reel 2000 $4.8665
CAT5251YI-50-T2 Active
Pb-free
Halide free
CAT5251 TSSOP-24 948AR 1 260 Tape and Reel 2000 $4.8665
Market Leadtime (weeks) : 17 to 20
Market Leadtime (weeks) : 17 to 20

Product
Description
Pricing ($/Unit)
Compliance
Status
# of Pots
# of Taps
Type
Control Interface
Resistance Typ (kΩ)
VH Max (V)
Wiper Position Memory
VDD Max (V)
Package Type
CAT5251YI-00-T2  
 $4.8665 
Pb
H
 Active   
4
256
Potentiometer
SPI
100
VCC
Yes
6
TSSOP-24
CAT5251YI-50-T2  
 $4.8665 
Pb
H
 Active   
4
256
Potentiometer
SPI
50
VCC
Yes
6
TSSOP-24
Case Outlines
948AR   
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