Renesas X9250US24I

Overview

X9250US24I from Intersil is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution per channel, SPI serial interface, and dual ±2.7V to ±5.5V analog supplies (V+/V−), operating across −40°C to +85°C. It integrates four independent 50kΩ resistor arrays with nonvolatile wiper position storage, <5µA standby current, and 40Ω typical wiper resistance at 5V - used for precision gain/offset trimming in programmable power supplies and sensor signal conditioning.

For engineers reviewing the X9250US24I datasheet, X9250US24I pinout, X9250US24I application, or X9250US24I equivalent, this page delivers verified electrical parameters, SOIC-24 package layout, SPI timing constraints, wiper control architecture, and real-world use cases including voltage regulator feedback tuning and comparator hysteresis adjustment.

Technical Context

The X9250US24I implements four independent 255-segment resistor arrays, each controlled by an 8-bit volatile Wiper Counter Register (WCR) and backed by four 8-bit nonvolatile Data Registers (DR0–DR3). Wiper position is updated via SPI write, XFR transfer, or real-time increment/decrement commands - all synchronized to SCK rising edges with CS active low.

It supports true dual-supply operation: V+ and V− define the analog rail range (±2.7V to ±5.5V), while VCC powers digital logic (2.7V–5.5V). Hardware write protection (WP) disables nonvolatile register writes, and HOLD enables serial communication pause without resetting the instruction sequence.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300 mil), RoHS-compliant, Pb-free plus anneal finish (M24.3 drawing).

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 X9250US24I uniquely supports true dual-supply analog operation (±5.5V), enabling precision bipolar signal conditioning unattainable with single-rail DCPs - critical for sensor front-ends and AC-coupled amplifiers.

Availability

X9250US24I is available at Aetrix Electronics and suitable for programmable power supplies, industrial sensor modules, precision comparator circuits, and audio signal processors requiring stable component supply across extended temperature ranges.

Supply support for X9250US24I 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 manufacturer specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.

The X9250US24I belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in high-reliability, field-programmable analog systems requiring nonvolatile setting retention.

FAQ

What is the absolute maximum voltage rating for V+ and V− pins on the X9250US24I?

The X9250US24I specifies absolute maximum ratings of +10V on V+ and −10V on V− relative to VSS. However, the recommended operating range is ±2.7V to ±5.5V. Exceeding ±5.5V violates the specified operating conditions and may compromise reliability or cause permanent damage, even if within absolute max limits.

Does the X9250US24I support true bipolar operation with independent V+ and V− supplies?

Yes, the X9250US24I supports true bipolar analog operation: V+ can be set to +5.5V and V− to −5.5V simultaneously, enabling resistor arrays to span a 11V differential range. This allows direct interfacing with bipolar op-amps and AC-coupled signals without level-shifting circuitry - a key differentiator from single-supply DCPs.

How does the hardware write protect (WP) pin function on the X9250US24I?

When the WP pin is held LOW, the X9250US24I blocks all nonvolatile writes to its four Data Registers (DR0–DR3). This prevents accidental overwriting of factory-calibrated wiper positions during normal SPI communication. Volatile WCR updates remain fully functional, allowing runtime adjustment without risking stored settings.

What is the power-up behavior of the X9250US24I wiper position?

On power-up, the X9250US24I automatically loads the contents of Data Register 0 (DR0) into the corresponding Wiper Counter Register (WCR) for each of the four potentiometers. This ensures a known, nonvolatile default setting without host MCU intervention - essential for fail-safe operation in power supply feedback loops.

Can the X9250US24I be used in a two-wire (shared SI/SO) SPI configuration?

Yes, the X9250US24I supports two-wire SPI: SI and SO are both three-state outputs and can be wired together with a single series resistor. The device tri-states SO when not selected (CS HIGH) or during write operations, preventing bus contention - reducing microcontroller pin count in space-constrained designs.