CAT5119SDI-10GT3

Digital Potentiometers Overview

The CAT5119SDI-10GT3 is a single-channel digital potentiometer configured as a variable resistor with a nominal end-to-end resistance of 10 kΩ. It features 32 discrete taps controlled via a 2-wire up/down serial interface (CS and U/D pins). The device operates on a single supply voltage ranging from 2.7 V to 5.5 V, drawing an active current of 25 µA and a standby current of 0.3 µA at 5 V. It utilizes a volatile wiper memory that resets to midscale upon power-up. The component is housed in a space-saving SC-70 (6-lead) surface-mount package.

Digital Potentiometers Feature Summary

• Configured as a variable resistor with 10 kΩ nominal resistance and 32-tap resolution.
• Operates on a single 2.7 V to 5.5 V supply with ultra-low standby current of 0.3 µA.
• Glitchless switching between resistor taps ensures stable operation during adjustments.
• Power-on reset circuitry initializes the wiper position to midscale.

Digital Potentiometers Applications

• LCD screen contrast or bias adjustment
• Gain adjustment in amplifier circuits
• Line impedance matching
• Replacement for mechanical potentiometers in automated production

Digital Potentiometers Procurement Notes

Verify the specific suffix 'SDI' corresponds to the SC-70 package and '10' indicates the 10 kΩ resistance value against the manufacturer's official ordering guide. Confirm RoHS compliance status and lead-free finish specifications directly with the supplier prior to procurement.

Digital Potentiometers Selection Notes

Select this part when a variable resistor configuration is required rather than a potentiometer setup. Ensure the application supports volatile memory behavior, as settings are lost upon power loss. Verify that the 32-tap resolution meets the precision requirements of the target circuit.

Digital Potentiometers Part Context

This component belongs to the CAT511x family of 32-tap digital potentiometers manufactured by onsemi. While functionally similar to the CAT5110, it differs in internal terminal connections; the CAT5119 is specifically designed as a variable resistor where the low terminal connects to pin 5, unlike the potentiometer configuration of other family members.

Digital Potentiometers Replacement Considerations

CAT5119TBI-10-T3 (SOT-23-6 package variant)

Digital Potentiometers FAQ

How does the CAT5119 differ from the CAT5110?

The CAT5119 is configured as a variable resistor with the low terminal connected to pin 5, whereas the CAT5110 is configured as a potentiometer with the wiper on pin 5.

What happens to the wiper position after power is cycled?

The device contains volatile memory; therefore, the wiper position is not retained. A power-on reset circuit sets the wiper to the midscale position upon power-up.

What is the maximum toggle rate for the serial interface?

The up/down toggle rate can reach 1 MHz, provided the settling time constraints are met.