Renesas X9241AWST2

Overview

X9241AWST2 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 operation over 0°C to +70°C. It functions as four independent digitally adjustable resistors in a single SOIC-20 package, used for precision gain/offset trimming in analog signal chains and programmable biasing in sensor interfaces.

For engineers reviewing the X9241AWST2 datasheet, X9241AWST2 pinout, X9241AWST2 application, or X9241AWST2 equivalent, this page delivers verified specifications, validated pin functions, confirmed cascade-mode operation, real-world use cases in industrial control and audio systems, and two rigorously cross-checked alternative parts with documented functional differences.

Technical Context

The X9241AWST2 implements four independent 63-segment resistor arrays, each controlled by a 6-bit volatile Wiper Counter Register (WCR) and backed by four 8-bit nonvolatile Data Registers (DR0–DR3). Power-up automatically loads DR0 into each WCR, enabling repeatable startup settings without host intervention.

It uses a standard 2-wire I²C-compatible bus with slave address formed by fixed 0101b prefix plus user-configurable A0–A3 pins. All four pots share the same SCL/SDA interface, supporting global register transfers, wiper increment/decrement via clocked SDA level, and cascading of adjacent arrays via CM bit control in the WCR.

Key Specifications

Pinout & Package

Package: 20-lead SOIC (Small Outline Integrated Circuit), RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9241AWST2, AD5242BRUZ10 offers finer resolution but halves channel count and omits cascading, while MCP42010-I/P provides same channel count and resolution but demands SPI infrastructure and external nonvolatile storage - making X9241AWST2 optimal for I²C-based, space-constrained, self-contained calibration systems.

Availability

X9241AWST2 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable audio gain control, medical instrument bias adjustment, and programmable power supply feedback requiring stable component supply and long-term lifecycle support.

Supply support for X9241AWST2 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 configurable mixed-signal solutions for industrial and medical applications.

The X9241A family was designed specifically for replacing mechanical potentiometers in automated calibration, closed-loop control, and programmable analog front-ends - emphasizing nonvolatile retention, I²C simplicity, and multi-pot integration.

FAQ

What is the exact end-to-end resistance value of each potentiometer in X9241AWST2?

The X9241AWST2 has four 10kΩ potentiometers, as specified in the Ordering Information table (Pot 0 = 10k, Pot 1 = 10k, Pot 2 = 10k, Pot 3 = 10k). This value is trimmed at wafer test and guaranteed within ±20% tolerance per RTOTAL specification. Each pot maintains matched temperature coefficient (<±20 ppm/°C ratiometric) for stable ratio performance across temperature.

Does X9241AWST2 support true I²C communication including ACK polling?

Yes, X9241AWST2 fully supports I²C protocol features including start/stop conditions, 7-bit slave addressing (0101b + A3:A0), and ACK polling during nonvolatile writes. After issuing a Write Data Register command, the host can immediately poll with START + slave address; an ACK confirms completion of the 10ms internal EEPROM write cycle.

Can the wiper terminals of X9241AWST2 be disabled independently per channel?

Yes. The DW (Disable Wiper) bit - bit 6 of each Wiper Counter Register - enables independent wiper disable per potentiometer. When DW = 1, the corresponding VW/RW terminal is electrically isolated and floats. This allows selective channel shutdown or safe configuration of cascaded arrays where only one wiper remains active.

What is the maximum allowable voltage across VH and VL pins of X9241AWST2?

The absolute maximum voltage difference between any VH/RH and VL/RL pin is 10V (ΔV = |VH/RH − VL/RL| ≤ 10V), per Absolute Maximum Ratings. Additionally, individual pin voltages must remain within −3.0V to +5V referenced to VSS. Exceeding either limit risks permanent damage to the internal FET switches or resistor array.

How does power-up sequencing affect X9241AWST2 wiper recall behavior?

X9241AWST2 requires strict power-up sequencing: VCC must reach ≥90% of final value before applying signals to VH/VL/VW pins. Violating this (e.g., applying analog voltages before VCC stabilizes) may prevent DR0-to-WCR auto-load, resulting in undefined wiper positions. The tPUR specification (1ms) defines minimum delay before first read access post-power-up.