Renesas X9259US24IZ

Overview

X9259US24IZ from Renesas (formerly Intersil) is a quad digitally controlled potentiometer (XDCP™) IC integrating four independent 256-tap, 50kΩ end-to-end resistance DCPs in a single SOIC-24 package. It operates from 2.7V to 5.5V, features 2-wire serial interface, nonvolatile data registers with 100-year retention, and supports wiper position recall at power-up. It serves as programmable gain/offset trim in precision analog signal chains.

For engineers reviewing the X9259US24IZ datasheet, X9259US24IZ pinout, X9259US24IZ application, or X9259US24IZ equivalent, this page delivers verified electrical specs, industrial-grade temperature range (-40°C to +85°C), SOIC-24 package mapping, confirmed 2-wire bus timing compliance (400kHz), and real-world use cases in sensor conditioning, voltage regulation, and audio control circuits.

Technical Context

The X9259US24IZ implements four independent CMOS-switched resistor arrays, each with 256 discrete taps and an associated volatile 8-bit Wiper Counter Register (WCR) and four nonvolatile 8-bit Data Registers (DR0–DR3). Wiper position is set via serial write, transfer from DR, or increment/decrement command - all executed over a standard 2-wire (I²C-compatible) interface.

Each DCP functions as either a three-terminal potentiometer (RH–RW–RL) or two-terminal variable resistor. Hardware write protection (WP pin) disables nonvolatile writes. Power-up loads DR#0 into corresponding WCR, ensuring deterministic startup behavior without host intervention.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (RoHS-compliant, M24.3 drawing), industrial temperature range (-40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ100 and MCP42050-I/P, the X9259US24IZ provides four independent DCPs with integrated nonvolatile registers and hardware write protection in a single SOIC-24 package - reducing component count, eliminating external memory, and hardening against inadvertent configuration loss in industrial environments.

Availability

X9259US24IZ is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply design, and embedded audio control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9259US24IZ 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 and maintains full technical and manufacturing continuity for the XDCP™ family. Renesas is a global semiconductor leader focused on embedded processing, analog, power, and connectivity solutions.

The X9259 belongs to Renesas' XDCP™ (Digitally Controlled Potentiometer) product line, designed specifically for replacing mechanical trimmers in precision analog systems where programmability, repeatability, and long-term stability are critical - especially in industrial, medical, and communications equipment.

FAQ

What is the operating temperature range for the X9259US24IZ?

The X9259US24IZ is rated for industrial operation from -40°C to +85°C. This range is explicitly specified in the Ordering Information table of the FN8169 datasheet and validated across all electrical parameters including wiper resistance, linearity, and nonvolatile write timing. The "I" suffix in the part number denotes this extended temperature grade, distinguishing it from commercial-grade variants (0°C to +70°C).

Does the X9259US24IZ require external pull-up resistors on the SDA and SCL lines?

Yes, the X9259US24IZ requires external pull-up resistors on both SDA and SCL pins. The datasheet specifies SDA as an open-drain output, and SCL as a CMOS input - consistent with standard I²C bus requirements. Typical values range from 1.8kΩ to 10kΩ depending on bus capacitance and speed; 4.7kΩ is commonly used for 400kHz operation with moderate trace length.

How many nonvolatile data registers does each potentiometer in the X9259US24IZ have?

Each of the four potentiometers in the X9259US24IZ has four independent 8-bit nonvolatile Data Registers (DR#0 through DR#3). These registers store wiper positions or system parameters and retain data for 100 years. At power-up, DR#0 for each DCP is automatically loaded into its corresponding volatile Wiper Counter Register (WCR), ensuring repeatable startup behavior.

Can the X9259US24IZ be used as a two-terminal variable resistor?

Yes, the X9259US24IZ can be configured as a two-terminal variable resistor by connecting either RH or RL to the wiper (RW) pin, effectively shorting one end of the resistor array. The datasheet explicitly states this capability under "Circuit Level Applications" and confirms it is supported across all four DCPs without performance degradation or derating.

What is the maximum clock frequency supported by the 2-wire interface of the X9259US24IZ?

The X9259US24IZ supports a maximum 2-wire (I²C-compatible) clock frequency of 400kHz, as specified in the AC Timing table (Page 14, FN8169 Rev 6.00). This is standard-mode I²C speed, and all timing parameters - including t_CYC, t_HIGH, t_SU:DAT, and t_AA - are guaranteed across the full industrial temperature and voltage range.