Renesas X9221AWSZT1

Overview

X9221AWSZT1 from Intersil is a dual digitally controlled potentiometer (XDCP™) with 64-tap resolution per channel, 2-wire I²C-compatible serial interface, and nonvolatile storage for up to four wiper positions per pot. It operates at 10 V supply, supports 0°C to +70°C commercial temperature range, and is housed in a 20-lead SOIC package - ideal for precision analog trimming in programmable power supplies and sensor calibration circuits.

For engineers reviewing the X9221AWSZT1 datasheet, X9221AWSZT1 pinout, X9221AWSZT1 application, or X9221AWSZT1 equivalent, this page delivers verified electrical specs, validated pin functions, confirmed dual-potentiometer architecture, real-world use cases in voltage scaling and gain control, and two technically documented alternative parts with explicit functional and parametric distinctions.

Technical Context

The X9221AWSZT1 integrates two independent 63-element resistor arrays with dedicated volatile Wiper Counter Registers (WCR) and four nonvolatile Data Registers (DR0–DR3) per channel. Each array provides 64 discrete tap points, enabling precise 1.6% resolution adjustment of resistance ratios between VH/RH, VL/RL, and VW/RW terminals.

Its 2-wire serial interface complies with standard I²C timing (fSCL ≤ 100 kHz), supports slave address configuration via A0–A3 pins, and implements ACK polling for nonvolatile write completion detection. Power-up automatically loads DR0 into each WCR, ensuring repeatable startup wiper positions without host initialization.

Key Specifications

Pinout & Package

Package: 20-lead SOIC (300-mil, MDP0027), RoHS-compliant Pb-free plus anneal finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9221AWSZT1, AD5242BRUZ10 offers higher resolution but lacks dual-channel integration and 10 V tolerance, while MCP42010-I/P provides dual channels and same resistance value but requires SPI and loses settings at power-down - making X9221AWSZT1 uniquely suitable for 10 V, I²C-based, nonvolatile dual-pot applications.

Availability

X9221AWSZT1 is available at Aetrix Electronics and suitable for programmable power supplies, sensor calibration systems, industrial DAC interfaces, and audio equipment requiring stable component supply with guaranteed long-term availability.

Supply support for X9221AWSZT1 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) is a U.S.-based semiconductor company specializing in precision analog and power management ICs for industrial, communications, and computing markets.

The X9221A family was designed specifically for digitally reconfigurable analog signal conditioning - delivering nonvolatile, multi-register digital potentiometers that replace mechanical trimmers in high-reliability embedded systems.

FAQ

What is the maximum supply voltage for X9221AWSZT1?

The X9221AWSZT1 is rated for 10 V ±0% (absolute maximum 10.3 V ΔV across VH–VL). Unlike 5 V variants (e.g., X9221AYSZT1), this version supports higher-voltage analog signal paths without external level-shifting, making it suitable for industrial sensor interfaces and programmable power supplies operating above 5 V.

Does X9221AWSZT1 retain wiper settings after power loss?

Yes, X9221AWSZT1 retains wiper positions in nonvolatile Data Registers (DR0–DR3), with guaranteed 100-year data retention. Upon power-up, DR0 contents are automatically loaded into each Wiper Counter Register - ensuring repeatable analog behavior without host intervention during boot.

How many unique wiper positions does X9221AWSZT1 support per channel?

X9221AWSZT1 supports 64 discrete wiper positions per channel (0x00 to 0x3F), corresponding to 63 resistive segments in each 10 kΩ array. This yields 1.6% resolution per step - sufficient for precision applications like sensor offset calibration and audio volume control.

Can X9221AWSZT1 be used as a two-terminal variable resistor?

Yes, X9221AWSZT1 can operate as a two-terminal variable resistor by connecting either VH/RH or VL/RL to circuit ground and using VW/RW as the adjustable terminal. This configuration avoids end-to-end resistance drift and is commonly used in current-source biasing and LED brightness control.

What is the I²C address configuration method for X9221AWSZT1?

X9221AWSZT1 uses pins A0–A3 to set the four least-significant bits of its 8-bit I²C slave address (MSB = 0101). With all address pins grounded, the default address is 0x50. This allows up to 16 devices on the same bus - essential for multi-channel calibration systems using multiple X9221AWSZT1 units.