ISL23318TFUZ

Digital Potentiometers Overview

The ISL23318TFUZ is a digitally controlled potentiometer (XDCP) manufactured by Renesas Electronics Corporation. It features a single circuit with a resistance value of 50 kOhms and 128 taps, accessed via an I2C interface. The device operates within a supply voltage range of 1.2V to 5.5V or 1.7V to 5.5V, depending on the specific configuration. It utilizes volatile memory for wiper position storage and is housed in a 10-UTQFN package measuring 2.1x1.6 mm. The component exhibits a typical temperature coefficient of 85 ppm/°C and supports a contact resistance of approximately 70 Ohms.

Digital Potentiometers Feature Summary

• Single-channel digital potentiometer with 50 kOhm total resistance and 128 user-adjustable taps.
• I2C serial interface allows for programmable wiper positioning and optional address selection.
• Operates on a wide supply voltage range from 1.2V to 5.5V, suitable for low-voltage applications.
• Available in a compact 10-UTQFN surface-mount package designed for space-constrained designs.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise resistance adjustment.
• Voltage reference trimming in precision measurement systems.
• Audio volume control circuits utilizing digital interfaces.
• Adaptive biasing networks in analog signal processing chains.

Digital Potentiometers Procurement Notes

Verify component authenticity through authorized distributors due to potential availability issues. Confirm that the specific suffix matches the required tape-and-reel packaging format. Check for end-of-life status or obsolescence notices from Renesas, as older revisions may be discontinued. Ensure compatibility with existing PCB footprints for the 10-UTQFN package before procurement.

Digital Potentiometers Selection Notes

Select this component when a single-channel, 50 kOhm digital potentiometer with I2C control is required. Consider the 128-tap resolution for fine adjustment needs. Verify that the 1.2V minimum operating voltage aligns with the system power rails. Evaluate the 10-UTQFN package dimensions against available board space constraints.

Digital Potentiometers Part Context

This part belongs to the XDCP series of digitally controlled potentiometers from Renesas. It serves as a solid-state alternative to mechanical potentiometers, offering improved reliability and programmability. The ISL23318 variant specifically targets applications needing moderate resistance values with digital interface integration.

Digital Potentiometers Replacement Considerations

Public confirmed substitute part numbers include ISL23418UFUZ-TK. Verify pinout compatibility and electrical specifications before substitution. Ensure the replacement maintains the same I2C interface protocol and package footprint.