CAT5221WI10

Digital Potentiometers Overview

The CAT5221WI10 is a dual digitally programmable potentiometer from onsemi, featuring two independent linear-taper pots with 64 taps each. It integrates I2C serial interface logic and 16 bytes of non-volatile RAM (NVRAM) to store up to four wiper settings per potentiometer. The device operates within a supply voltage range of 2.5 V to 6.0 V and supports an industrial temperature range of -40°C to +85°C. Key electrical characteristics include a typical wiper resistance of 80 Ω at 5 V, ±20% end-to-end resistance tolerance, and standby current below 1 µA. It is housed in a 20-lead SOIC package.

Digital Potentiometers Feature Summary

• Dual linear-taper digital potentiometers with 64 resistor taps each
• I2C serial interface for control and memory access
• Non-volatile memory stores up to four wiper settings per pot with automatic recall on power-up
• Industrial temperature range (-40°C to +85°C) and 2.5 V to 6.0 V operation

Digital Potentiometers Applications

• Circuit level adjustments requiring digital control of resistance
• System level calibration of analog signals
• Gain adjustment in audio or instrumentation circuits
• Bias and modulation current control in optical modules

Digital Potentiometers Procurement Notes

Verify the specific suffix for packaging requirements; 'WI' denotes SOIC-20 package while 'YI' indicates TSSOP-20. Confirm availability status as distribution channels may list this component as obsolete or limited stock. Ensure the selected part number matches the required resistance value (10 kΩ for '-10') and lead finish specifications.

Digital Potentiometers Selection Notes

Select based on required resistance tolerance and package type. The CAT5221WI10 offers 10 kΩ nominal resistance with ±20% tolerance. Consider the I2C address configuration via A0-A3 pins if multiple devices share a bus. Verify that the application voltage stays within the 2.5 V to 6.0 V range to ensure proper operation of the CMOS switches and NVRAM.

Digital Potentiometers Part Context

This component belongs to the CAT5221 family of dual digital potentiometers. Variants exist with different resistance values (2.5 kΩ, 50 kΩ, 100 kΩ) and packages (SOIC-20, TSSOP-20). The 'WI10' designation specifically identifies the 10 kΩ version in the SOIC-20 package. Other family members like CAT5221YI10 share identical electrical functionality but differ in physical footprint.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include CAT5221WI25, CAT5221WI50, and CAT5221WI00 for different resistance values. For TSSOP-20 packaging, the CAT5221YI10 is the equivalent alternative. Cross-manufacturer replacements require verification of I2C protocol compatibility and wiper resistance characteristics.