ISL23428WFVZ-T7A

Digital Potentiometers Overview

The ISL23428WFVZ-T7A is a dual-channel digital potentiometer IC from the Renesas ISL23428 series. It features two independent potentiometers, each with 128 taps and a resistance value of 10 kOhms. The device utilizes a volatile brush memory architecture and communicates via a Serial Peripheral Interface (SPI). It operates within a supply voltage range of 1.7 V to 5.5 V, with a typical operating current of 100 uA at 3.3 V. The component supports a linear taper and has a temperature coefficient of 45 PPM/C with a tolerance of 20%. It is housed in a 14-lead TSSOP package and is rated for an industrial temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual-channel configuration with 128 taps per potentiometer
• 10 kOhms nominal resistance with linear taper
• SPI serial interface for control
• Volatile wiper position storage

Digital Potentiometers Applications

• Industrial process control systems requiring adjustable gain or reference voltages
• Sensor signal conditioning circuits
• Programmable filter frequency adjustments

Digital Potentiometers Procurement Notes

This component is designated as End-of-Life (EOL) by the manufacturer. Production has ceased, and the part is no longer actively manufactured. Verification of authenticity and condition is critical when sourcing from secondary markets due to the discontinuation status.

Digital Potentiometers Selection Notes

Select this part only if the specific combination of dual channels, 10 kOhms resistance, and 128 taps meets the design requirements. Note that the volatile memory requires power restoration to maintain state unless external retention is implemented. Ensure the SPI interface compatibility with the host microcontroller.

Digital Potentiometers Part Context

The ISL23428WFVZ-T7A belongs to the ISL23428 family of digital potentiometers. The suffix 'W' indicates the wider body TSSOP-14 package, while 'FVZ' denotes the industrial temperature grade and lead-free composition. The '-T7A' suffix specifies the tape and reel packaging format.

Digital Potentiometers Replacement Considerations

As the part is discontinued, direct substitutes must be sourced from third-party distributors. Verify pinout compatibility and electrical specifications against alternatives such as other dual-channel SPI digital potentiometers from manufacturers like Microchip or Analog Devices.