CAT5119SDI-50GT3

Digital Potentiometers Overview

The CAT5119SDI-50GT3 is a single-channel, 32-tap digitally programmable variable resistor manufactured by onsemi. It operates within a supply voltage range of 2.7 V to 5.5 V and features a nominal end-to-end resistance of 50 kΩ with a temperature coefficient of 200 ppm/°C. The device utilizes a 2-wire up/down serial interface for wiper control and includes power-on reset circuitry that defaults the wiper to midscale upon initialization. Packaged in a space-saving SC-70 (6-lead) format, it draws an active supply current of 25 µA and standby current of 0.3 µA at 5 V.

Digital Potentiometers Feature Summary

• Configured as a variable resistor with 32 digital tap positions controlled via a 2-wire serial interface.
• Nominal 50 kΩ end-to-end resistance with ±1 LSB differential nonlinearity and glitchless switching.
• Ultra-low power consumption: 25 µA active current and 0.3 µA standby current at VDD = 5 V.
• Power-on reset sets wiper to midscale; available in compact SC-70-6 package.

Digital Potentiometers Applications

• LCD screen contrast and brightness adjustment
• Digital volume control in audio circuits
• Gain adjustment in operational amplifier configurations
• Mechanical potentiometer replacement in automated calibration systems

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix 'SDI' corresponds to the SC-70-6 package and '50' indicates the 50 kΩ resistance value. Confirm the 'GT3' suffix matches the required tape and reel shipping quantity of 3000 units. Ensure the component meets RoHS compliance standards for lead-free and halogen-free requirements before finalizing procurement specifications.

Digital Potentiometers Selection Notes

Select this part when a variable resistor configuration is required rather than a potentiometer. The CAT5119 connects the low terminal to pin 5, distinguishing it from the CAT5118 which connects the high terminal. Verify that the 50 kΩ resistance value aligns with the target circuit impedance and that the 2-wire interface is compatible with the host microcontroller's serial communication capabilities.

Digital Potentiometers Part Context

This component belongs to the CAT511x family of 32-tap linear-taper digital potentiometers. While the broader family includes devices like the CAT5110 and CAT5118, the CAT5119 is specifically designated as a variable resistor. It shares the same electrical characteristics and interface protocols as its siblings but differs in internal terminal connectivity and package availability options.

Digital Potentiometers Replacement Considerations

The CAT5118SDI-50GT3 serves as a functional alternative if the circuit requires the high terminal connected to pin 5 instead of the low terminal. Other family members such as the CAT5124 offer similar functionality but may differ in wiper resistance specifications or package types. Verify pin compatibility and internal terminal connections before substituting.