Renesas X9258US24Z

Overview

X9258US24Z from Intersil is a quad digital potentiometer IC implementing four independent 256-tap resistor arrays with volatile wiper counter registers and nonvolatile data registers, supporting 2-wire (I²C-compatible) interface, ±2.7V to ±5.5V dual analog supplies, and 50kΩ end-to-end resistance per potentiometer - used for precision gain/offset trimming in bipolar signal conditioning circuits.

For engineers reviewing the X9258US24Z datasheet, X9258US24Z pinout, X9258US24Z application, or X9258US24Z equivalent, key selection criteria include dual-supply analog operation (V+ = +2.7V to +5.5V, V− = −2.7V to −5.5V), 0.6% resolution, 40Ω typical wiper resistance at ±5V, nonvolatile wiper storage with 100-year data retention, and SOIC-24 package compatibility.

Technical Context

The X9258US24Z integrates four monolithic CMOS resistor arrays, each with 255 discrete segments and 256 tap points controlled by an 8-bit wiper counter register (WCR). Each potentiometer features four nonvolatile data registers (DR0–DR3) and supports volatile wiper updates via serial write, global transfer, or real-time increment/decrement using SCL edge-triggered commands.

It operates as a slave on a 2-wire bus with programmable 4-bit device address (A0–A3), hardware write protection (WP), and automatic power-up recall of DR0 into the WCR. The interface complies with standard I²C timing (f_SCL ≤ 400 kHz) and uses open-drain SDA with external pull-up.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300 mil), Pb-free, RoHS compliant (PKG DWG # M24.3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ100 and MCP42050-I/P, the X9258US24Z uniquely supports true dual-supply analog operation (V+/V−), enabling direct connection to bipolar signal chains without external level shifters or rail splitters - reducing BOM count and improving noise immunity in precision measurement systems.

Availability

X9258US24Z is available at Aetrix Electronics and suitable for audio signal conditioning, medical sensor calibration, industrial instrumentation, and programmable threshold detection requiring stable component supply and long-term calibration integrity.

Supply support for X9258US24Z 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 markets.

The X9258 product line delivers digitally programmable analog components optimized for calibration-critical applications requiring nonvolatile storage, bipolar operation, and robust I²C control - targeting test equipment, medical diagnostics, and process control systems.

FAQ

What is the supply voltage range for X9258US24Z analog operation?

The X9258US24Z supports dual analog supplies: V+ = +2.7V to +5.5V and V− = −2.7V to −5.5V. This allows direct interfacing with bipolar signals without external level-shifting circuitry. The digital supply VCC operates independently from 2.7V to 5.5V. All three supplies must stabilize within 1ms of each other for reliable wiper position recall on power-up.

Does X9258US24Z support true I²C communication?

Yes, the X9258US24Z implements a fully compatible 2-wire interface meeting standard I²C timing requirements (f_SCL ≤ 400 kHz, t_HIGH ≥ 600 ns, t_LOW ≥ 1300 ns). Its SDA pin is open-drain with internal logic-level compatibility, and it responds to standard start/stop conditions and 7-bit slave addresses (0101xxxx format).

How many nonvolatile registers does X9258US24Z provide per potentiometer?

The X9258US24Z provides four nonvolatile data registers (DR0–DR3) for each of its four potentiometers - totaling 16 independent 8-bit storage locations. DR0 is automatically loaded into the wiper counter register (WCR) on power-up, while DR1–DR3 support user-defined calibration presets or system parameters.

What is the wiper resistance specification for X9258US24Z at ±5V supplies?

At V+ = +5V and V− = −5V, the X9258US24Z exhibits 40Ω typical wiper resistance (RW), with a maximum of 100Ω. This low on-resistance minimizes insertion error in precision feedback networks and ensures predictable gain accuracy when used in op-amp configurations.

Can X9258US24Z be used in place of mechanical potentiometers in high-reliability applications?

Yes, the X9258US24Z replaces mechanical potentiometers in high-reliability applications through 100,000 nonvolatile write cycles per register and 100-year data retention. Its solid-state architecture eliminates wear-out mechanisms, while hardware write protection (WP pin) prevents accidental calibration corruption - making it ideal for medical, aerospace, and industrial control systems.