Renesas X9250US24I-2.7T1

Overview

X9250US24I-2.7T1 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution per channel, SPI serial interface, dual analog supply support (±2.7V to ±5.5V), 50kΩ end-to-end resistance, and nonvolatile wiper position storage. It operates across –40°C to +85°C in 24-lead SOIC and serves as precision voltage divider or variable resistor in programmable gain amplifiers and sensor calibration circuits.

For engineers reviewing the X9250US24I-2.7T1 datasheet, X9250US24I-2.7T1 pinout, X9250US24I-2.7T1 application, or X9250US24I-2.7T1 equivalent, key selection criteria include its 2.7V–5.5V VCC range, independent wiper control per pot, hardware write-protect (WP) pin, 4× nonvolatile data registers per channel, and <5µA standby current - all critical for low-power industrial control and embedded analog tuning.

Technical Context

The X9250US24I-2.7T1 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 commands including direct WCR write, register transfer, or increment/decrement mode with real-time SCK-synchronized stepping.

It supports true bipolar analog operation with separate V+ (2.7V–5.5V) and V– (–2.7V to –5.5V) supplies, enabling rail-to-rail wiper voltage swing across the VH/RH–VL/RL terminals. The device uses CMOS switches for tap selection, delivers 40Ω typical wiper resistance at 5V, and guarantees 100,000 write cycles and 100-year data retention per register.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300 mil), RoHS-compliant, Pb-free plus anneal option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42010-I/P, the X9250US24I-2.7T1 uniquely combines quad-channel integration, true bipolar analog operation, four nonvolatile registers per pot, and hardware write protection - making it optimal for industrial instrumentation requiring robust, persistent analog tuning.

Availability

X9250US24I-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, embedded audio balancing, and precision analog front-end tuning requiring stable component supply and long-term lifecycle continuity.

Supply support for X9250US24I-2.7T1 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 X9250 product line was designed for high-reliability analog tuning in harsh environments, emphasizing nonvolatile configuration storage, wide supply tolerance, and extended temperature operation - targeting test equipment, medical devices, and factory automation.

FAQ

What is the operating temperature range for the X9250US24I-2.7T1?

The X9250US24I-2.7T1 is rated for industrial operation from –40°C to +85°C. This range is confirmed in the Ordering Information table on page 2 of FN8165 Rev.3.00, where "X9250US24I-2.7" is explicitly listed with "–40 to +85" under TEMP. RANGE. It ensures reliable performance in demanding environments such as factory-floor controllers and outdoor instrumentation.

Does the X9250US24I-2.7T1 support true bipolar analog operation?

Yes, the X9250US24I-2.7T1 supports true bipolar analog operation via dedicated V+ (2.7V to 5.5V) and V– (–2.7V to –5.5V) supply pins. As specified on page 11, these supplies power the resistor arrays independently of VCC, allowing wiper voltages to span the full range between V– and V+. This enables AC-coupled signal conditioning and dual-supply op-amp configurations without external level-shifting.

How many nonvolatile data registers does each potentiometer in the X9250US24I-2.7T1 have?

Each of the four potentiometers in the X9250US24I-2.7T1 has four independent 8-bit nonvolatile Data Registers (DR0 through DR3), as stated in the FEATURES section (page 1) and detailed in the DEVICE DESCRIPTION (page 4). These registers retain wiper settings for 100 years and support selective transfer to the volatile Wiper Counter Register - enabling multi-preset operation per channel.

What is the maximum SPI clock frequency supported by the X9250US24I-2.7T1?

The X9250US24I-2.7T1 supports a maximum SPI clock frequency of 2.0 MHz, as specified in the AC TIMING table on page 13 of FN8165 Rev.3.00. This limit applies across the full operating temperature and supply range. Exceeding 2 MHz may result in unreliable command execution or data corruption due to internal timing constraints of the serial interface circuitry.

Can the X9250US24I-2.7T1 be used as a two-terminal variable resistor?

Yes, the X9250US24I-2.7T1 can be configured as a two-terminal variable resistor by connecting either VH/RH or VL/RL to the desired reference potential and using VW/RW as the adjustable terminal - as confirmed in the DESCRIPTION section (page 1): "The XDCP can be used as a three-terminal potentiometer or as a two-terminal variable resistor." This mode is commonly applied in current-limiting or bias-current adjustment circuits.