Renesas X9221AWSIZT1

Overview

X9221AWSIZT1 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 from a 10V supply, features 50kΩ end-to-end resistance, and is used in precision analog trimming, sensor calibration, and programmable gain control circuits.

For engineers reviewing the X9221AWSIZT1 datasheet, X9221AWSIZT1 pinout, X9221AWSIZT1 application, or X9221AWSIZT1 equivalent, this page delivers verified electrical specs, validated SOIC-20 package mapping, confirmed I²C timing compliance (100kHz max), and real-world use cases in industrial instrumentation and embedded power management systems.

Technical Context

The X9221AWSIZT1 integrates two independent 63-segment resistor arrays with volatile Wiper Counter Registers (WCR) and four nonvolatile Data Registers (DR0–DR3) per pot. Each array supports three-terminal potentiometer or two-terminal variable resistor configurations, with wiper position controlled via 2-wire serial commands including direct write, register transfer, and increment/decrement modes.

It implements I²C slave addressing with fixed 0101b device ID and user-configurable A0–A3 pins, supports ACK polling during 10ms nonvolatile writes, and guarantees ±300ppm/°C temperature coefficient and 100,000 write cycles per register bit. Power-up automatically loads DR0 into each WCR.

Key Specifications

Pinout & Package

Package: 20-lead SOIC (300-mil width), RoHS-compliant Pb-free plus anneal finish, JEDEC MS-013AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ100 and MCP42010-I/P, the X9221AWSIZT1 uniquely supports 10V operation, dedicated increment/decrement control, and 50kΩ resistance optimized for industrial signal conditioning - making it the only option among the three qualified for 0–10V analog systems requiring field-adjustable calibration.

Availability

X9221AWSIZT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply trim, and embedded audio balance control requiring stable component supply and long-term obsolescence support.

Supply support for X9221AWSIZT1 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.

The X9221A family was engineered specifically for replacing mechanical potentiometers in digitally programmable analog signal paths, emphasizing nonvolatile configuration retention, I²C compatibility, and robust operation across commercial temperature ranges.

FAQ

What is the maximum supply voltage for the X9221AWSIZT1?

The X9221AWSIZT1 is rated for a 10V supply voltage, as confirmed in the Ordering Information table on page 2 of FN8163 Rev 2.00. This distinguishes it from other variants like X9221AYS (5V) and enables direct use in 0–10V analog systems without level-shifting circuitry. Absolute maximum ratings allow up to +7V on VH/VL/VW pins relative to VSS, consistent with its 10V VCC rating.

Does the X9221AWSIZT1 support true I²C communication?

Yes, the X9221AWSIZT1 implements a fully compliant 2-wire serial interface compatible with I²C standards, including START/STOP conditions, ACK polling, and 7-bit slave addressing (with fixed 0101b prefix and user-defined A0–A3 bits). Its timing parameters - tLOW ≥4700ns, tHIGH ≥4000ns, and fSCL ≤100kHz - meet I²C Standard Mode specifications per Figure 10 in the datasheet.

How many wiper positions can be stored nonvolatily in the X9221AWSIZT1?

The X9221AWSIZT1 provides four nonvolatile Data Registers (DR0–DR3) per potentiometer channel, allowing up to eight distinct wiper positions (four per channel) to be stored and recalled across power cycles. Each register write requires a 10ms internal EEPROM cycle, and power-up automatically loads DR0 into the respective Wiper Counter Register.

What is the function of the RES pins on the X9221AWSIZT1?

The X9221AWSIZT1 has five RES (Reserved) pins - pins 12, 13, 14, 17, and 20 - which must remain unconnected per the Pin Descriptions section on page 2 of FN8163 Rev 2.00. These pins have no internal connection and are not intended for external use; connecting them may cause undefined behavior or damage.

Can the X9221AWSIZT1 operate as both a potentiometer and a rheostat?

Yes, the X9221AWSIZT1 supports both configurations: as a three-terminal potentiometer (using VH, VL, and VW) and as a two-terminal variable resistor (rheostat) by connecting either VH or VL to VW. The datasheet explicitly states this capability on page 1 under DESCRIPTION, confirming suitability for control, parameter adjustments, and signal processing in either topology.