CAT5129TDI-10GT3

Digital Potentiometers Overview

The CAT5129TDI-10GT3 is a single digital potentiometer from onsemi, featuring a 32-tap linear taper resistor array connected between the RH terminal and GND. It operates on a single supply voltage ranging from 2.5 V to 5.5 V with a typical standby current of 1 µA. The device utilizes a nonvolatile EEPROM to store wiper settings, ensuring data retention for up to 100 years without power. Control is managed via a three-wire serial interface consisting of CS, U/D, and INC pins. The component is housed in a compact 6-lead TSOT-23 package.

Digital Potentiometers Feature Summary

• Non-volatile EEPROM storage retains wiper position across power cycles
• Single-supply operation compatible with 2.5 V to 5.5 V logic levels
• Compact 6-lead TSOT-23 surface-mount package
• Increment/Decrement serial control interface

Digital Potentiometers Applications

• Automated product calibration
• Remote control adjustments
• Offset, gain, and zero control circuits
• Tamper-proof calibration systems

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix 'GT3' corresponds to the tape and reel shipping configuration containing 3000 units per reel. Confirm that the 'I' suffix indicates the industrial temperature range of -40°C to +85°C. Ensure compatibility with the TSOT-23 footprint during procurement planning.

Digital Potentiometers Selection Notes

Select this model over the CAT5127 when a ground-referenced variable resistance is required rather than a floating two-terminal resistor. The 10 kΩ resistance value provides a resolution of approximately 3.2% per tap. Verify that the 32-position step count meets the precision requirements for the intended analog function adjustment.

Digital Potentiometers Part Context

This part belongs to the CAT512x family of digitally programmable potentiometers manufactured by onsemi. It serves as an electronic replacement for mechanical trim pots in high-volume production lines. The device integrates a five-bit up/down counter and decoder to manage the wiper position relative to the internal resistor string.

Digital Potentiometers Replacement Considerations

The CAT5127ZI-10-T3 is a functional substitute within the same series but uses an MSOP-8 package and connects the low terminal to RL instead of GND. Cross-reference pinouts carefully due to the different package types and internal connection differences.