Renesas X9259UV24IT2

Overview

X9259UV24IT2 from Renesas (formerly Intersil) is a quad digitally controlled potentiometer (XDCP™) IC implementing four independent 256-tap, 50kΩ end-to-end resistance potentiometers with volatile wiper counter registers and nonvolatile data registers. It operates from 2.7V to 5.5V, features 2-wire serial interface, <5µA standby current, and 100-year data retention. It serves as programmable gain/voltage trim elements in analog signal conditioning circuits.

For engineers reviewing the X9259UV24IT2 datasheet, X9259UV24IT2 pinout, X9259UV24IT2 application, or X9259UV24IT2 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in sensor calibration and power regulation, and two validated alternative parts with documented functional and application-level differences.

Technical Context

The X9259UV24IT2 integrates four monolithic CMOS DCP cores, each comprising 256 resistor taps switched via CMOS transmission gates. Wiper position is controlled by an 8-bit volatile Wiper Counter Register (WCR), loaded at power-up from nonvolatile Data Register DR#0.

It uses a standard 2-wire (I²C-compatible) bus with SDA/SCL, four address pins (A0–A3), hardware write-protect (WP), and supports three-byte instructions for read/write WCR/DR and two-byte transfers between them. Each DCP has dedicated RH, RL, and RW terminals.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (RoHS-compliant, M24.173 drawing). Pin count and layout match SOIC variant but with reduced footprint and thermal profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9259UV24IT2, AD5242BRUZ10 offers SPI compatibility but sacrifices nonvolatile storage and resolution, while MCP42010-I/P provides lower-cost dual-channel operation but lacks both 256-tap precision and hardware write protection-making X9259UV24IT2 optimal for high-reliability, field-calibrated analog systems requiring guaranteed 100-year data persistence.

Availability

X9259UV24IT2 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded power regulation, and audio signal processing applications requiring stable component supply, long-term data retention, and RoHS-compliant packaging.

Supply support for X9259UV24IT2 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

Renesas Electronics Corporation (acquired Intersil in 2017) is a global semiconductor leader specializing in microcontrollers, analog, and power management solutions for industrial, automotive, and infrastructure markets.

The X9259 series belongs to Renesas' XDCP™ (Digitally Controlled Potentiometer) product line, designed specifically for replacing mechanical potentiometers in precision analog trimming, calibration, and programmable gain applications where long-term stability and digital configurability are essential.

FAQ

What is the operating voltage range for the X9259UV24IT2?

The X9259UV24IT2 operates from 2.7V to 5.5V, making it compatible with both 3.3V and 5V logic systems. This wide supply range allows direct integration into mixed-voltage designs without level-shifting circuitry. The device maintains full functionality-including 256-tap resolution and nonvolatile register access-across the entire range. Its VCC specification is explicitly defined in the ordering information as "2.7 to 5.5V" for the -2.7 suffix variant, confirming robust low-voltage operation down to 2.7V.

Does the X9259UV24IT2 support I²C communication?

Yes, the X9259UV24IT2 supports standard 2-wire serial communication fully compatible with I²C protocols, including START/STOP conditions, ACK/NACK handshaking, and 400kHz maximum clock frequency. It responds to 8-bit slave addresses formed by device type identifier "0101" plus user-configurable A3–A0 pins. While not a full I²C-compliant slave (e.g., no clock stretching), its timing and electrical behavior align with standard I²C masters, enabling seamless integration with microcontrollers featuring native I²C peripherals.

How many potentiometers does the X9259UV24IT2 integrate, and what is their resistance value?

The X9259UV24IT2 integrates four independent digitally controlled potentiometers (DCPs), each with a nominal end-to-end resistance (RTOTAL) of 50kΩ. These are implemented as monolithic CMOS resistor arrays with 256 discrete taps. Each DCP has dedicated RH, RL, and RW pins, allowing simultaneous or individual configuration. The 50kΩ value is specified in the Ordering Information table for the "U" version and confirmed in Analog Specifications under RTOTAL.

What is the purpose of the WP pin on the X9259UV24IT2?

The WP (Write Protect) pin on the X9259UV24IT2 is an active-low hardware control that disables all nonvolatile writes to the Data Registers when pulled LOW. This prevents accidental overwriting of calibrated trim values during system operation or firmware updates. When WP is HIGH, nonvolatile writes (e.g., Write Data Register, XFR to DR) are enabled. Its function is explicitly documented in the Pin Descriptions and Functional Pin Descriptions sections of the datasheet, and it operates independently of software commands.

Can the X9259UV24IT2 retain wiper settings after power loss?

Yes-the X9259UV24IT2 retains wiper settings across power cycles via its nonvolatile Data Registers. At power-up, the device automatically loads the contents of DR#0 (default register) into the corresponding volatile Wiper Counter Register (WCR) for each DCP. Since DR#0 is nonvolatile and rated for 100-year data retention, the last stored wiper position persists indefinitely without backup power. This behavior is guaranteed by the device architecture and confirmed in the Power Up and Down Recommendations section.