Renesas X9221AWSIZ

Overview

X9221AWSIZ from Intersil is a dual digitally controlled potentiometer (XDCP™) IC with 64-tap resolution per channel, 2-wire serial interface, and nonvolatile data register storage. It integrates two independent 2 kΩ resistor arrays in a single SOIC-20 package, supporting three-terminal potentiometer or two-terminal variable resistor configurations for precision analog control in embedded systems.

For engineers reviewing the X9221AWSIZ datasheet, X9221AWSIZ pinout, X9221AWSIZ application, or X9221AWSIZ equivalent, this device delivers deterministic wiper positioning via I²C-compatible 2-wire bus, supports up to four stored wiper positions per pot, and operates across 0°C to +70°C with 5 V ±10% supply - critical for industrial sensor calibration, audio level trimming, and programmable gain control.

Technical Context

The X9221AWSIZ implements two independent 63-segment resistor arrays with decoded 6-bit Wiper Counter Registers (WCR), enabling precise 1.6% resolution wiper positioning. Each potentiometer features volatile WCRs and four nonvolatile Data Registers (DR0–DR3), with power-up auto-load from DR0.

Its 2-wire interface uses open-drain SDA and clocked SCL pins, supports slave address configuration via A0–A3 inputs (0101xxxx format), and executes nine instruction types including Read/Write WCR, Register Transfer, and Increment/Decrement wiper commands with ACK polling for nonvolatile writes.

Key Specifications

Pinout & Package

Package: 20-lead SOIC (300-mil, Pb-free), MDP0027 footprint. Dimensions: 12.8 mm × 7.5 mm × 2.35 mm (D × E × A2). RoHS compliant with matte tin termination.

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 X9221AWSIZ uniquely combines dual 2 kΩ pots, nonvolatile register storage, and 2-wire interface in SOIC-20 - optimizing for compact, self-contained analog trimming where deterministic power-up behavior and minimal host resource usage are essential.

Availability

X9221AWSIZ is available at Aetrix Electronics and suitable for industrial sensor calibration, audio level control, and programmable power supply feedback requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for X9221AWSIZ 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, computing, and communications markets, with ISO9001-certified manufacturing.

The X9221AWSIZ belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered specifically for replacing mechanical trimmers in automated calibration, programmable gain control, and embedded analog signal conditioning systems.

FAQ

What is the exact resistor value and tolerance for X9221AWSIZ?

The X9221AWSIZ has a nominal end-to-end resistance of 2 kΩ per potentiometer with a tolerance of ±20%, as specified in the Analog Characteristics table of the FN8163 datasheet. This value is fixed for the AWSIZ variant and confirmed in the Ordering Information table under "RTOTAL (k)".

Does X9221AWSIZ support true I²C communication?

Yes, X9221AWSIZ implements a fully compatible 2-wire serial interface with open-drain SDA and clocked SCL pins, supporting standard I²C start/stop conditions, ACK polling, and 7-bit slave addressing (with 4-bit user-configurable address bits A0–A3). It operates up to 100 kHz clock frequency.

How many nonvolatile registers does X9221AWSIZ have, and what do they store?

The X9221AWSIZ contains eight nonvolatile Data Registers - four per potentiometer (DR0–DR3). These store wiper positions or system parameters; DR0 is automatically loaded into the Wiper Counter Register (WCR) at power-up, ensuring repeatable startup behavior without host intervention.

Can X9221AWSIZ operate from a 3.3 V supply?

No, X9221AWSIZ is rated only for 5 V ±10% operation (4.5 V to 5.5 V), as stated in the Recommended Operating Conditions section. Using 3.3 V violates the absolute minimum VCC specification and will result in unreliable register access and wiper positioning.

What is the maximum wiper current rating for X9221AWSIZ?

The X9221AWSIZ specifies a maximum wiper current (IW) of ±3 mA per potentiometer, as defined in the Analog Characteristics table. Exceeding this limit risks degradation of wiper resistance (typical 40–130 Ω) and long-term endurance beyond the rated 100,000 writes per bit.