ISL23428TFRUZ-TK

Digital Potentiometers Overview

The ISL23428TFRUZ-TK is a quad, volatile, low-voltage digitally controlled potentiometer (DCP) manufactured by Renesas Electronics. It integrates four independent DCP cores, wiper switches, and control logic on a monolithic CMOS integrated circuit. The device features an SPI Bus interface for digital control and offers 128 tap positions per potentiometer. It operates within a supply voltage range of 1.7 V to 5.5 V and supports an operating temperature range from -40°C to +125°C. The component is housed in a TSSOP-20 package.

Digital Potentiometers Feature Summary

• Quad configuration with four independent 128-tap digitally controlled potentiometers
• SPI Bus interface for serial data input and command processing
• Volatile memory architecture requiring power restoration for state retention
• Low noise and low power consumption characteristics suitable for portable applications

Digital Potentiometers Applications

• Battery-powered instrumentation systems
• Portable consumer electronics requiring volume or gain adjustment
• Industrial process control loops utilizing digital feedback
• Audio equipment featuring digital volume control

Digital Potentiometers Procurement Notes

Verify the specific suffix 'TFRUZ' against official Renesas documentation to confirm the TSSOP-20 package variant and tape-and-reel packaging format. Confirm RoHS compliance status through the manufacturer's current datasheet revision. Check for obsolescence notices as this component family may have been superseded by newer iterations.

Digital Potentiometers Selection Notes

Select this component when a quad-channel digital potentiometer with SPI compatibility is required. Ensure the system design accounts for volatile memory behavior, as wiper positions reset upon power loss. Verify that the 128-tap resolution meets the application's precision requirements compared to other tap counts available in the series.

Digital Potentiometers Part Context

This part belongs to the ISL234xx series of XDCP devices, which are designed for low-voltage, low-power applications. The series typically includes variants with different numbers of potentiometers (single, dual, quad) and interface types (I2C, SPI). The ISL23428 specifically denotes the quad-channel SPI version.

Digital Potentiometers Replacement Considerations

Consult the Renesas product transition page for officially recommended replacements if this part is discontinued. Potential substitutes include other members of the ISL234xx family with compatible pinouts and electrical specifications.