Renesas X9241AWSI

Overview

X9241AWSI 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 -40°C to +85°C industrial temperature rating. It functions as four independent digitally adjustable resistors in a single SOIC-20 package for precision analog trimming in embedded control systems.

For engineers reviewing the X9241AWSI datasheet, X9241AWSI pinout, X9241AWSI application, or X9241AWSI equivalent, this page delivers verified specifications, validated pin functions, confirmed cascade-mode operation, real-world use cases in sensor calibration and power supply feedback, and two technically documented alternative parts with explicit functional and parametric distinctions.

Technical Context

The X9241AWSI implements four independent 63-element resistor arrays with decoded 6-bit Wiper Counter Registers (WCR), each supporting volatile wiper positioning and four nonvolatile Data Registers (DR0–DR3) for persistent tap storage. Power-up automatically loads DR0 into each WCR.

It uses a standard 2-wire I²C-compatible interface with slave address formed by fixed 0101b prefix plus A0–A3 inputs, supports global and per-pot register transfers, and enables cascading of adjacent arrays via CM bit control - allowing combined resistance values from 4kΩ to 200kΩ with synchronized wiper movement across linked channels.

Key Specifications

Pinout & Package

20-lead SOIC package (JEDEC MS-013AC), RoHS-compliant, 0.300" wide body, 1.27mm pitch, with exposed pad not present. Pin 1 marked by notch or dot; pin numbering counterclockwise from top-left corner.

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 X9241AWSI uniquely delivers quad-channel integration, hardware-supported cascading, true bipolar terminal voltage tolerance (-3.0V to +5V), and on-chip nonvolatile storage - making it the only option among the three capable of replacing four mechanical pots with full power-cycle recall in industrial analog systems.

Availability

X9241AWSI is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, laser diode biasing, and audio signal level control requiring stable component supply across long-lifecycle embedded programs.

Supply support for X9241AWSI 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 leader in precision analog and power management ICs, delivering high-reliability solutions for industrial, infrastructure, and communications markets.

The X9241A family was designed specifically for digitally replacing mechanical potentiometers in analog signal conditioning, calibration, and feedback control applications - emphasizing nonvolatile storage, multi-channel integration, and robust I²C interoperability.

FAQ

What is the exact resistance value per potentiometer in the X9241AWSI?

The X9241AWSI is configured with 10kΩ end-to-end resistance for all four potentiometers (Pot 0 through Pot 3). This value is fixed per the ordering information table in FN8164 Rev 7.00, where X9241AWSIZ specifies "Pot 0 = 10k, Pot 1 = 10k, Pot 2 = 10k, Pot 3 = 10k". Cascading allows combined values such as 20kΩ or 40kΩ, but individual arrays remain 10kΩ.

Does the X9241AWSI support true bipolar operation on its potentiometer terminals?

Yes, the X9241AWSI supports true bipolar operation: its VH/RH, VL/RL, and VW/RW pins tolerate voltages from -3.0V to +5V referenced to VSS. This enables use in AC-coupled circuits, dual-supply op-amp configurations, and applications requiring negative signal swing - a key differentiator from many competing digital potentiometers limited to unipolar ranges.

How does the cascade mode work in the X9241AWSI, and which pins must be connected?

In cascade mode, the X9241AWSI links adjacent resistor arrays (e.g., Pot2 to Pot3) by connecting VL/RL of the higher-order pot to VH/RH of the lower-order pot. The CM bit in the WCR enables cascading; only one wiper remains active (others disabled via DW bit). External connections require VH/RH, VL/RL, and VW/RW wiring between cascaded channels - as shown in Figure 9 of FN8164 Rev 7.00.

What is the power-up behavior of the X9241AWSI wiper registers?

On power-up, the X9241AWSI automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR). This ensures repeatable startup positions without host initialization. The recommended power sequence is VCC first, then potentiometer pins, with VCC ramp rate between 0.2–50 V/ms per FN8164 Rev 7.00 Page 11.

Can the X9241AWSI be used with standard I²C master controllers without custom firmware?

Yes, the X9241AWSI uses a standard 7-bit I²C slave address (0101xxx) with ACK-based handshaking and supports repeated start conditions. All instructions - including Read/Write WCR, Read/Write Data Register, and Increment/Decrement - follow conventional I²C timing (fSCL ≤ 100kHz, tLOW ≥ 4700ns). No custom protocol translation is required; standard I²C drivers can fully control the X9241AWSI.