Renesas X9258TS24I-2.7

Overview

X9258TS24I-2.7 from Renesas (formerly Intersil) is a quad digital potentiometer IC with 256-tap resolution per channel, dual ±2.7V to ±5.5V analog supplies, 2-wire I²C-compatible interface, and nonvolatile wiper position storage in DR0. It functions as four independent digitally adjustable resistors for precision gain/offset trimming in analog signal chains.

For engineers reviewing the X9258TS24I-2.7 datasheet, X9258TS24I-2.7 pinout, X9258TS24I-2.7 application, or X9258TS24I-2.7 equivalent, key selection criteria include its 100kΩ end-to-end resistance, -40°C to +85°C industrial temperature range, 24-pin SOIC package, 40Ω typical wiper resistance at ±5V, and hardware write-protect (WP) pin for register integrity.

Technical Context

The X9258TS24I-2.7 integrates four independent resistor arrays-each with 255 segments and 256 tap points-controlled by volatile 8-bit Wiper Counter Registers (WCR) and four nonvolatile 8-bit Data Registers (DR0–DR3) per channel. Each array operates as a three-terminal potentiometer or two-terminal variable resistor.

It uses a 2-wire serial interface compliant with I²C timing (400kHz max), supports device addressing via A0–A3 pins (up to 16 devices on bus), and features hardware write protection (WP pin) to prevent unintended nonvolatile 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 AD5204BRUZ100 and MCP42050-I/P, the X9258TS24I-2.7 uniquely supports true bipolar analog operation (±2.7V to ±5.5V), includes hardware write protection, and provides four independent channels in one SOIC-24 package-making it optimal for industrial calibration and precision analog signal conditioning where rail flexibility and data integrity are essential.

Availability

X9258TS24I-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and audio signal level control requiring stable component supply across extended temperature and long-lifecycle deployments.

Supply support for X9258TS24I-2.7 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 (acquired Intersil in 2017) is a global semiconductor leader specializing in microcontrollers, analog, and power management solutions for industrial, automotive, and infrastructure markets.

The X9258 series was designed as a high-reliability, nonvolatile digital potentiometer family targeting factory-calibrated instrumentation, sensor signal conditioning, and analog front-end trimming where long-term stability and bipolar operation are mandatory.

FAQ

What is the absolute maximum voltage rating for the V+ and V− pins of the X9258TS24I-2.7?

The X9258TS24I-2.7 specifies an absolute maximum V+ voltage of +10V and V− voltage of −10V relative to VSS. However, the recommended operating range remains ±2.7V to ±5.5V. Exceeding these limits risks permanent damage to the internal resistor arrays and CMOS switches, and is not covered under warranty.

Does the X9258TS24I-2.7 support true I²C bus compliance, including clock stretching and arbitration?

The X9258TS24I-2.7 implements a 2-wire serial interface compatible with I²C timing (400kHz max), but it does not support clock stretching or multi-master arbitration. It operates strictly as a slave device with fixed timing parameters (e.g., tHIGH ≥ 600ns). Host controllers must manage bus contention externally.

How does the hardware write-protect (WP) pin function on the X9258TS24I-2.7?

When the WP pin is driven LOW, the X9258TS24I-2.7 blocks all nonvolatile writes to its Data Registers (DR0–DR3). Volatile WCR updates remain enabled. This prevents accidental overwriting of calibrated values during system operation, and WP state is sampled asynchronously upon instruction decode.

Can the X9258TS24I-2.7 be used with unipolar analog supplies (e.g., 0V and +5V)?

Yes-the X9258TS24I-2.7 supports unipolar operation: tie V− to VSS (0V) and apply V+ = +2.7V to +5.5V. All four potentiometers then function between 0V and V+, maintaining full 256-tap resolution and nonvolatile storage. The VH/VL and VW pins scale accordingly.

What is the wiper response time after issuing a Write Wiper Counter Register command to the X9258TS24I-2.7?

After issuing a Write Wiper Counter Register command, the X9258TS24I-2.7 updates the physical wiper position within 10µs (tWRL), as specified in the datasheet. This delay is deterministic and independent of supply ramp rate, ensuring predictable analog settling in closed-loop systems.