Renesas ISL90841UIV1427Z

Overview

ISL90841UIV1427Z from Intersil is a quad digitally controlled potentiometer (XDCP™) IC with 50kΩ total resistance per channel, 256-tap resolution (0.4%), I²C interface, and 14-lead TSSOP package. It operates from 2.7V to 5.5V, draws <5µA standby current, and supports voltage divider or rheostat configurations in precision analog control circuits.

For engineers reviewing the ISL90841UIV1427Z datasheet, ISL90841UIV1427Z pinout, ISL90841UIV1427Z application, or ISL90841UIV1427Z equivalent, key selection considerations include its 50kΩ resistance option, -40°C to +85°C industrial temperature range, wiper resistance of 70Ω typical at 3.3V, I²C address configuration via A0/A1 pins, and monolithic integration of four independent DCPs with volatile wiper registers.

Technical Context

The ISL90841UIV1427Z implements four independent digitally controlled potentiometers using resistor ladders and CMOS switches, each with an 8-bit volatile wiper register (WR) directly accessible via I²C. All RH terminals connect internally to VCC-side nodes while RW terminals serve as adjustable taps referenced to GND.

I²C communication uses a 7-bit slave address formed by fixed prefix "01010" plus A1/A0 logic levels, supporting both write (WR load) and read (WR readback) operations. Power-up resets all wiper registers to 80h (mid-scale), and wiper response time is 1µs after SCL falling edge of final data byte.

Key Specifications

Pinout & Package

ISL90841UIV1427Z is housed in a 14-lead Pb-free TSSOP (Package Code V14) with 0.65mm pitch, 4.3–4.5mm body width, and 0.25–0.50mm thickness. Pin 1 is RH3; pin 14 is RW0. The package is RoHS-compliant and MSL-1 rated for lead-free reflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled potentiometer applications.

Compared with AD5242BRUZ10 and MCP42010-I/P, the ISL90841UIV1427Z offers higher 50kΩ resistance for reduced current draw in high-impedance dividers, tighter DCP matching (±2 LSB), and lower wiper resistance-making it optimal for precision industrial calibration where resolution, matching, and low signal path error are critical.

Availability

ISL90841UIV1427Z is available at Aetrix Electronics and suitable for industrial instrumentation, sensor calibration, programmable gain amplifiers, and audio level control requiring stable component supply and long-term sourcing continuity.

Supply support for ISL90841UIV1427Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Intersil Corporation (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for industrial, communications, and computing markets, with ISO9001-certified manufacturing.

The ISL90841UIV1427Z belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered for precision analog trimming, calibration, and parameter adjustment in noise-sensitive, low-power industrial systems.

FAQ

What is the total resistance value of the ISL90841UIV1427Z?

The ISL90841UIV1427Z has a total resistance of 50kΩ per digitally controlled potentiometer channel. This value is fixed and specified in the ordering information as the "U" option (50kΩ), distinguishing it from the "W" option (10kΩ) offered in the same ISL90841 family. The 50kΩ resistance supports high-impedance voltage divider applications with minimal quiescent current draw.

Does the ISL90841UIV1427Z retain wiper settings after power cycling?

No, the ISL90841UIV1427Z uses volatile wiper registers only. Upon power-up, all four wiper registers reset to 80h (mid-scale), placing each wiper at approximately 50% of its resistance range. To restore a specific setting, the host controller must reprogram the wiper registers via I²C after power-on. Nonvolatile alternatives like the MCP42010-I/P would be required for persistent settings.

How many I²C addresses can be assigned to the ISL90841UIV1427Z?

The ISL90841UIV1427Z supports four unique I²C slave addresses via hardware pins A0 and A1. With A1/A0 combinations (00, 01, 10, 11), the base address "01010" forms 7-bit addresses 0x28, 0x29, 0x2A, and 0x2B. This allows up to four ISL90841UIV1427Z devices-or mixed variants-to coexist on the same I²C bus without address conflict.

What is the maximum wiper current rating for the ISL90841UIV1427Z?

The maximum wiper current rating for the ISL90841UIV1427Z is ±3.0mA per DCP channel, as specified under Recommended Operating Conditions. Exceeding this limit risks increased wiper resistance drift or long-term reliability degradation. For applications involving higher currents, external buffering or series limiting resistors should be used to protect the wiper terminals.

Is the ISL90841UIV1427Z RoHS compliant and lead-free?

Yes, the ISL90841UIV1427Z is RoHS compliant and supplied in a Pb-free plus anneal configuration. Its 14-lead TSSOP package uses 100% matte tin plating and RoHS-compliant molding compounds, meeting IPC/JEDEC J-STD-020 reflow requirements for lead-free assembly. The "Z" suffix in the part number explicitly denotes this Pb-free construction.