Renesas X9241AWSIT1

Overview

X9241AWSIT1 from Intersil is a quad digital controlled potentiometer (XDCP™) IC with nonvolatile storage, 2-wire I²C interface, 64-tap resolution per channel, 10kΩ end-to-end resistance per pot, and -40°C to +85°C industrial temperature range. It functions as four independent digitally adjustable resistors in a single SOIC-20 package, used for precision gain/offset trimming in sensor signal conditioning circuits.

For engineers reviewing the X9241AWSIT1 datasheet, X9241AWSIT1 pinout, X9241AWSIT1 application, or X9241AWSIT1 equivalent, key selection criteria include wiper position retention after power loss, cascading capability across arrays, 2-wire bus timing compliance at 100kHz, and ±3mA max wiper current handling under industrial thermal conditions.

Technical Context

The X9241AWSIT1 implements four independent resistor arrays-each with 63 segments and 64 discrete tap points-controlled via decoded 6-bit Wiper Counter Registers (WCR). Each array supports three-terminal potentiometer or two-terminal variable resistor configurations with VH/RH, VL/RL, and VW/RW terminals.

It uses a register-oriented 2-wire interface with slave address format 0101[A3:A0], supporting nine instructions including Read/Write WCR, Read/Write Data Registers, Data Register ↔ WCR transfers (global or per-pot), and Increment/Decrement wiper control. Nonvolatile writes require up to 10ms with ACK polling support.

Key Specifications

Pinout & Package

Package: 20-lead SOIC (Small Outline Integrated Circuit), RoHS-compliant, surface-mount, body width 7.5mm, lead pitch 1.27mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRZ10 and MCP42050-I/P, the X9241AWSIT1 uniquely combines I²C compatibility, nonvolatile wiper recall, and resistor array cascading - making it optimal for industrial systems requiring robust, self-restoring analog tuning without interface redesign.

Availability

X9241AWSIT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, laser diode biasing, and audio level control requiring stable component supply across long production lifecycles.

Supply support for X9241AWSIT1 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 provider of precision analog and power management ICs, now part of Renesas Electronics, with focus on industrial, infrastructure, and high-reliability applications.

The X9241A family was designed for digitally reconfigurable analog signal conditioning in harsh environments - emphasizing nonvolatile configuration retention, industrial temperature operation, and I²C accessibility for microcontroller-based systems.

FAQ

What is the maximum wiper current rating for X9241AWSIT1?

The X9241AWSIT1 has a maximum wiper current rating of ±3mA for 10kΩ and 50kΩ resistor arrays. This limit applies continuously under recommended operating conditions (-40°C to +85°C) and defines the safe current-handling capability of each VWx terminal. Exceeding this value may degrade long-term reliability or cause temporary wiper resistance shift. The X9241AWSIT1 datasheet specifies this rating in the Absolute Maximum Ratings table and confirms it applies to all four potentiometers in the X9241AWSIT1 device.

Does X9241AWSIT1 retain its wiper position after power cycling?

Yes, the X9241AWSIT1 retains wiper position after power cycling by loading the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) at power-up. This nonvolatile recall occurs automatically without host intervention. DR0 must be pre-programmed with the desired startup value, and the X9241AWSIT1 guarantees 100-year data retention in these registers. The behavior is confirmed in the "Power-up Requirements" section and functional description of the X9241AWSIT1 datasheet.

Can multiple X9241AWSIT1 devices share the same I²C bus?

Yes, multiple X9241AWSIT1 devices can share the same I²C bus using the A0–A3 address pins to assign unique 4-bit device addresses. Each X9241AWSIT1 decodes its own address match and responds only to commands targeting its assigned address. Up to 16 X9241AWSIT1 units can coexist on one bus, provided pull-up resistors are sized for total bus capacitance and SCL frequency remains ≤100kHz. This multi-drop capability is explicitly supported in the X9241AWSIT1 serial interface architecture.

What is the resolution and linearity performance of X9241AWSIT1?

The X9241AWSIT1 provides 64-tap (6-bit) resolution per potentiometer, yielding 1.56% step size. Its absolute linearity is ±1 MI (where MI = RTOTAL/63 ≈ 158.7Ω for 10kΩ arrays), and relative linearity is ±0.2 MI - ensuring monotonic, predictable voltage division. These specifications are measured across the full temperature range and published in the Analog Specifications table of the X9241AWSIT1 datasheet, confirming suitability for precision trimming applications.

How does cascading work between potentiometers in X9241AWSIT1?

Cascading in the X9241AWSIT1 connects adjacent resistor arrays (e.g., POT2 to POT3) by wiring VLx to VHy of the next higher-order pot, enabling extended resistance values from 4kΩ to 200kΩ. The Cascade Mode (CM) bit in the WCR controls activation, and only one wiper remains enabled while others are disabled via the DW bit. Wiper movement crosses array boundaries automatically during Increment/Decrement commands. This functionality is fully documented in the "Cascade Mode" section of the X9241AWSIT1 datasheet.