Renesas X9258UV24I-2.7

Overview

X9258UV24I-2.7 from Intersil is a quad digital potentiometer IC with 256-tap resolution per channel, dual ±2.7V to ±5.5V analog supplies (V+/V−), 2-wire I²C-compatible interface, and nonvolatile wiper position storage in four data registers per pot. It operates across −40°C to +85°C and is used for precision gain/offset trimming in industrial sensor signal conditioning circuits.

For engineers reviewing the X9258UV24I-2.7 datasheet, X9258UV24I-2.7 pinout, X9258UV24I-2.7 application, or X9258UV24I-2.7 equivalent, key selection criteria include its 50kΩ end-to-end resistance, 40Ω typical wiper resistance at ±5V, <5µA standby current, TSSOP-24 package, and support for hardware write protection via WP pin.

Technical Context

The X9258UV24I-2.7 implements four independent 255-segment resistor arrays with CMOS switch-based wiper control, each driven by an 8-bit volatile Wiper Counter Register (WCR) loaded at power-up from nonvolatile Data Register 0. Each potentiometer supports direct WCR writes, register-to-WCR transfers, and real-time increment/decrement via SCL edge-triggered commands.

Its 2-wire interface complies with standard I²C timing (f_SCL ≤ 400 kHz), uses open-drain SDA with external pull-up, and supports up to 16 devices on one bus via A0–A3 address inputs. Hardware write protection (WP pin) disables nonvolatile register writes while allowing volatile wiper updates.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), RoHS-compliant, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42050-I/SL, the X9258UV24I-2.7 delivers integrated quad bipolar operation, hardware write protection, and TSSOP-24 footprint efficiency - reducing BOM count by 75% and eliminating external level shifters in ±5V signal chains.

Availability

X9258UV24I-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifier design, and medical instrument offset control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9258UV24I-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

Intersil (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for industrial, communications, and computing markets, with emphasis on precision, reliability, and low-power operation.

The X9258 product line delivers digitally controlled potentiometers optimized for factory and field calibration in harsh environments, featuring nonvolatile storage, bipolar supply support, and robust I²C interface compliance.

FAQ

What is the absolute maximum voltage rating for the V+ and V− pins of the X9258UV24I-2.7?

The X9258UV24I-2.7 specifies absolute maximum ratings of +10V on V+ and −10V on V−, with a maximum differential (V+) − (V−) of 12V. Operation beyond these limits risks permanent damage. The recommended operating range remains ±2.7V to ±5.5V per the -2.7 suffix designation, and the device must never experience V+ or V− voltages outside their respective rails relative to VSS.

Does the X9258UV24I-2.7 support true I²C bus compatibility, including ACK polling during nonvolatile writes?

Yes, the X9258UV24I-2.7 fully supports standard I²C protocol including start/stop conditions, 7-bit addressing with A0–A3, and ACK polling. After issuing a nonvolatile write command (e.g., Write Data Register), the host can immediately initiate ACK polling by sending START + slave address; absence of ACK indicates ongoing internal write (t_WR ≤ 10 ms), while ACK confirms completion and readiness for next command.

How does power-up initialization work for the wiper positions in the X9258UV24I-2.7?

At power-up, the X9258UV24I-2.7 loads the contents of Data Register 0 (DR0) for each of the four potentiometers into their respective volatile Wiper Counter Registers (WCRs). This occurs only after all three supplies (VCC, V+, V−) stabilize - ensuring valid analog bias before wiper positioning. DR0 values persist across power cycles due to nonvolatile storage, making them ideal for factory-set calibration points.

Can the X9258UV24I-2.7 be used with unipolar analog supplies, such as 0V and +5V?

No - the X9258UV24I-2.7 requires true bipolar analog supplies: V+ must be ≥ +2.7V and V− must be ≤ −2.7V. Using 0V and +5V violates the specification that VL/RL pins must be referenced to V− and VH/RH to V+, and risks latch-up or undefined wiper behavior. For unipolar applications, consider the X9259 series or alternative single-supply DCPs.

What is the wiper response time after issuing a Write Wiper Counter Register command to the X9258UV24I-2.7?

The X9258UV24I-2.7 exhibits a wiper response time of ≤10 µs after a Write Wiper Counter Register instruction completes (t_WRL). This delay represents the time from final ACK of the command byte until the VW output settles to the new voltage position. It applies identically across all four potentiometers and is independent of supply voltage within the specified range.