Renesas X9241AUVIT1

Overview

X9241AUVIT1 from Intersil is a quad digital controlled potentiometer (XDCP™) IC with nonvolatile storage, 2-wire I²C interface, 64-tap resolution per channel, ±3.0V to +5V terminal voltage range, and 20-lead TSSOP RoHS-compliant package. It functions as four independent digitally adjustable resistors for precision analog control in embedded signal conditioning circuits.

For engineers reviewing the X9241AUVIT1 datasheet, X9241AUVIT1 pinout, X9241AUVIT1 application, or X9241AUVIT1 equivalent, this device supports register-oriented wiper control, cascaded resistor array configuration up to 200kΩ, and power-up recall from DR0 - critical for calibration retention and reconfigurable gain/offset tuning.

Technical Context

The X9241AUVIT1 implements four monolithic CMOS resistor arrays, each with 63 discrete segments and a 6-bit wiper counter register (WCR) decoded to select one of 64 tap points. Each potentiometer includes four nonvolatile data registers (DR0–DR3) supporting direct read/write and transfer operations.

It uses a standard 2-wire I²C-compatible interface with slave address formed by fixed 0101b prefix and user-configurable A0–A3 pins. Wiper position updates occur via Write WCR (volatile), XFR Data Register to WCR (nonvolatile), or real-time Increment/Decrement commands synchronized to SCL edges.

Key Specifications

Pinout & Package

20-lead Thin Shrink Small Outline Package (TSSOP), RoHS-compliant, 6.5mm × 4.4mm body, 0.65mm lead pitch. Pin 1 marked by notch or dot; leads are gull-wing, surface-mount compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42050-I/SL, X9241AUVIT1 uniquely delivers quad-channel integration, automatic DR0 power-up recall, and resistor cascading - enabling compact, self-contained analog trimming without firmware or external memory overhead.

Availability

X9241AUVIT1 is available at Aetrix Electronics and suitable for industrial sensor conditioning, medical instrument calibration, audio equipment manufacturing, and laser diode bias control requiring stable component supply and long-term calibration integrity.

Supply support for X9241AUVIT1 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 is a leading provider of precision analog and power management ICs, now part of Renesas Electronics, with deep expertise in high-reliability mixed-signal solutions for industrial and medical systems.

The X9241A family was designed specifically for applications demanding nonvolatile, multi-channel digital resistance control - targeting calibration-critical systems where manual potentiometers introduce variability and field service complexity.

FAQ

What is the resistance value configuration of X9241AUVIT1?

X9241AUVIT1 is factory-configured with four 50kΩ resistor arrays (Pot 0–3 = 50kΩ each), as indicated by the "U" in the part number per Intersil's ordering table. This value is fixed per unit and cannot be altered post-manufacture. The 50kΩ rating applies to end-to-end resistance (RTOTAL) with ±20% tolerance, and supports cascading to achieve 100kΩ or 200kΩ configurations using external wiring and CM bit control.

Does X9241AUVIT1 support true I²C bus operation including arbitration and clock stretching?

X9241AUVIT1 implements a 2-wire serial interface compatible with I²C electrical signaling (open-drain SDA/SCL, ACK responses, start/stop conditions), but does not support clock stretching or multi-master arbitration. It operates strictly as a slave device with fixed 100kHz maximum clock rate. Host controllers must manage bus timing and avoid collisions, as the device lacks hardware arbitration logic.

How does power-up wiper initialization work in X9241AUVIT1?

On power-up, X9241AUVIT1 automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR), establishing the initial wiper position. This occurs after VCC reaches 90% of nominal and potentiometer pins are stable. No host intervention is required, ensuring repeatable startup behavior essential for unattended systems.

Can X9241AUVIT1 be used in bipolar analog signal paths?

Yes - X9241AUVIT1 supports terminal voltages from −3.0V to +5V relative to VSS, enabling direct use in bipolar signal chains such as AC-coupled audio stages or dual-supply sensor interfaces. The VH/VL/VW pins tolerate this full range, and wiper leakage current remains below 1µA across the span, preserving signal fidelity without external level-shifting circuitry.

What is the maximum wiper current rating for X9241AUVIT1 at 50kΩ?

For X9241AUVIT1's 50kΩ resistor arrays, the maximum continuous wiper current is ±3mA, as specified in the Absolute Maximum Ratings table. This limit applies across the full operating temperature range (−40°C to +85°C) and assumes proper derating per the DCP Wiper Current De-rating Curve. Exceeding this may cause irreversible resistance drift or parametric shift.