Renesas X9258US24T1

Overview

X9258US24T1 from Intersil is a quad digital controlled potentiometer (XDCP™) integrating four 256-tap resistor arrays on a monolithic CMOS IC, supporting 2-wire serial interface, ±5V dual analog supplies (V+/V−), and 50kΩ end-to-end resistance per pot. It operates from −40°C to +85°C in 24-lead SOIC packaging and is used for precision analog parameter tuning in programmable gain amplifiers and sensor calibration circuits.

For engineers reviewing the X9258US24T1 datasheet, X9258US24T1 pinout, X9258US24T1 application, or X9258US24T1 equivalent, key selection criteria include wiper resolution (0.4%), nonvolatile data register retention (100 years), dual-supply analog operation (±2.7V to ±5.5V), 2-wire bus addressability (A0–A3), and hardware write protection (WP pin).

Technical Context

The X9258US24T1 implements four independent 255-segment resistor arrays with CMOS switch-controlled wipers, each driven by an 8-bit volatile Wiper Counter Register (WCR). Each potentiometer features four nonvolatile Data Registers (DR0–DR3) for persistent storage of wiper positions or system parameters.

It uses a standard I²C-compatible 2-wire interface with slave address format 0101[A3:A0], supports increment/decrement wiper control via SCL edge-triggered SDA level, and includes hardware write protection (WP low disables DR writes). Power-up automatically loads DR0 into each WCR.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300 mil), RoHS-compliant, Pb-free (e3 termination).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRZ10 and MCP42050-I/P, the X9258US24T1 uniquely supports true bipolar analog operation (±5V), hardware write protection, and I²C addressability - making it the only option for robust, field-calibratable, dual-rail analog tuning in industrial and medical equipment.

Availability

X9258US24T1 is available at Aetrix Electronics and suitable for programmable gain amplifiers, sensor calibration systems, laser diode bias control, and audio channel balancing requiring stable component supply across extended temperature and dual-supply environments.

Supply support for X9258US24T1 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 (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for industrial, communications, and computing applications.

The X9258 product line delivers digitally programmable analog components with nonvolatile memory and dual-supply operation, designed specifically for high-reliability calibration, trimming, and signal conditioning in harsh-environment systems.

FAQ

What is the operating temperature range for the X9258US24T1?

The X9258US24T1 is rated for operation from −40°C to +85°C, meeting industrial temperature requirements. This range is confirmed in the Ordering Information table (X9258US24IZ variant) and Operating Conditions section of the FN8168 datasheet. The device maintains specified performance-including wiper resistance, linearity, and nonvolatile write timing-across this full range, making X9258US24T1 suitable for deployment in outdoor instrumentation and factory automation equipment.

Does the X9258US24T1 support true bipolar analog operation?

Yes, the X9258US24T1 supports true bipolar analog operation via dedicated V+ and V− pins, rated from ±2.7V to ±5.5V. Unlike single-supply digital pots, this allows the resistor arrays to handle signals swinging fully between negative and positive rails-critical for AC-coupled sensor interfaces and audio applications. The datasheet specifies VH/RH and VL/RL pins must remain within V+ and V−, confirming X9258US24T1's native bipolar architecture.

How many nonvolatile data registers does each potentiometer in the X9258US24T1 have?

Each of the four potentiometers in the X9258US24T1 has four nonvolatile Data Registers (DR0–DR3), totaling 16 registers. DR0 is automatically loaded into the Wiper Counter Register (WCR) at power-up. All registers retain data for 100 years and withstand 100,000 write cycles-enabling X9258US24T1 to store multiple calibration profiles, user preferences, or system configuration states without external EEPROM.

Can the X9258US24T1 be used with standard I²C controllers?

Yes, the X9258US24T1 is fully compatible with standard-mode I²C controllers operating up to 400kHz. Its SCL/SDA interface adheres to I²C electrical specifications (open-drain, required pull-ups), and its 8-bit slave address follows the standard format (0101xxxx). The datasheet confirms ACK polling and timing compliance, ensuring X9258US24T1 interoperates with microcontrollers like STM32, PIC, and ESP32 without protocol translation or custom drivers.

What is the purpose of the WP pin on the X9258US24T1?

The WP (Write Protect) pin on the X9258US24T1 is a hardware-level, low-active signal that disables all nonvolatile writes to the Data Registers when pulled low. This prevents accidental or malicious overwriting of calibrated values during firmware updates or EMI events. Unlike software-only protection, WP operates independently of the I²C interface-ensuring X9258US24T1 retains critical calibration data even if host code fails or bus communication is corrupted.