Renesas X9258UV24IZ

Overview

X9258UV24IZ from Intersil (now Renesas) is a quad digital potentiometer IC implementing four independent 256-tap resistor arrays with volatile wiper counters and nonvolatile data registers, operating from dual analog supplies (±2.7V to ±5.5V) and a 2.7V–5.5V system supply, used for precision gain/offset trimming in instrumentation amplifiers and programmable filter tuning.

For engineers reviewing the X9258UV24IZ datasheet, X9258UV24IZ pinout, X9258UV24IZ application, or X9258UV24IZ equivalent, this page delivers verified electrical specs, TSSOP-24 package mapping, 2-wire interface timing constraints, wiper resolution (0.4%), and confirmed alternatives for industrial signal conditioning designs requiring low-noise, nonvolatile setting retention.

Technical Context

The X9258UV24IZ integrates four independent DCP channels, each with an 8-bit volatile Wiper Counter Register (WCR) controlling 255-series resistive elements and four 8-bit nonvolatile Data Registers (DR0–DR3). Wiper position is set via 2-wire serial interface (I²C-compatible), with power-up auto-load from DR0.

It supports dual-supply operation: V+ = +2.7V to +5.5V and V− = −2.7V to −5.5V, enabling true bipolar signal handling; wiper resistance is 40Ω typical at ±5V, and standby current is <5µA total. Hardware write protection (WP pin) disables nonvolatile register writes.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm wide), RoHS-compliant, moisture sensitivity level MSL3 per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/SL, the X9258UV24IZ uniquely supports true dual-supply analog operation (±2.7V to ±5.5V), I²C interface, and hardware write protection - making it the only option among the three for calibrated bipolar instrumentation and noise-critical signal chains.

Availability

X9258UV24IZ is available at Aetrix Electronics and suitable for instrumentation amplifier calibration, programmable filter design, DC bias generation, and audio channel balancing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9258UV24IZ 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 (acquired by Renesas Electronics in 2017) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, aerospace, and communications markets.

The X9258UV24IZ belongs to the XDCP™ (eXternally Digital Controlled Potentiometer) family, designed specifically for replacing mechanical trimmers in precision analog systems where nonvolatile setting retention, low noise, and dual-supply flexibility are critical.

FAQ

What is the maximum allowable voltage difference between V+ and V− for the X9258UV24IZ?

The X9258UV24IZ specifies an absolute maximum (V+) − (V−) of 12V. This means that while V+ can range from +2.7V to +5.5V and V− from −2.7V to −5.5V individually, their differential must not exceed 12V. For example, +5.5V and −5.5V (11V differential) is valid, but +5.5V and −7V would violate the rating. This limit protects the internal CMOS switches and resistor array integrity.

Does the X9258UV24IZ support true I²C bus compliance, including clock stretching and multi-master arbitration?

The X9258UV24IZ implements a 2-wire serial interface compatible with I²C protocol timing (400kHz max clock, proper start/stop/acknowledge sequences), but it does not support clock stretching or multi-master arbitration. It operates strictly as a slave device with fixed slave address format (0101xxxx). Host controllers must manage bus arbitration externally; the X9258UV24IZ will not hold SCL low or respond to repeated START conditions during transfers.

How does power-up behavior work for the wiper position in the X9258UV24IZ?

On power-up, the X9258UV24IZ automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR). This occurs after all three supplies (VCC, V+, V−) stabilize - typically within 1ms. The wiper then assumes the DR0-stored position immediately, enabling repeatable startup states without host initialization. DR0 must be pre-programmed during manufacturing or field calibration.

Can the X9258UV24IZ be used with only a single supply, such as +5V and GND?

No - the X9258UV24IZ requires both V+ and V− analog supplies to operate its resistor arrays and wiper switches. Using only +5V and GND violates the absolute minimum V− specification (−2.7V) and will prevent correct wiper switching or cause latch-up. For single-supply applications, consider alternatives like the MCP42050-I/SL. The X9258UV24IZ is purpose-built for bipolar analog signal paths.

What is the wiper current rating for the X9258UV24IZ, and how does it affect circuit design?

The X9258UV24IZ specifies ±15mA maximum wiper current (IW) per potentiometer. This defines the absolute safe operating limit for current flowing through the wiper terminal. In practice, design should keep wiper current ≤±1mA to maintain specified wiper resistance (40Ω typ) and linearity. Exceeding ±1mA increases RW and introduces nonlinearity; exceeding ±15mA risks permanent damage to the internal CMOS switches.