Renesas X9250UV24I-2.7

Overview

X9250UV24I-2.7 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution per channel, SPI serial interface, dual analog supplies (V+ = +2.7V to +5.5V, V– = –2.7V to –5.5V), and nonvolatile wiper position storage. It operates across –40°C to +85°C in a 24-lead TSSOP package and supports precision voltage divider, gain control, and offset adjustment in mixed-signal systems.

For engineers reviewing the X9250UV24I-2.7 datasheet, X9250UV24I-2.7 pinout, X9250UV24I-2.7 application, or X9250UV24I-2.7 equivalent, key selection considerations include its 2.7V–5.5V VCC range, ±2.7V to ±5.5V dual analog supply capability, 100kΩ/50kΩ selectable end-to-end resistance, 40Ω typical wiper resistance at 5V, and hardware write-protect (WP) functionality for register integrity.

Technical Context

The X9250UV24I-2.7 integrates four independent 255-segment resistor arrays, each controlled by an 8-bit volatile Wiper Counter Register (WCR) and four 8-bit nonvolatile Data Registers (DR0–DR3). Wiper position is updated via SPI instructions including direct WCR load, DR-to-WCR transfer, and increment/decrement mode with real-time SCK-edge-triggered stepping.

Its SPI interface complies with standard mode-0 timing (CPOL=0, CPHA=0), supports up to 2MHz clock frequency, and features tri-state SO/SI pins for bus sharing. The HOLD pin enables serial communication pause without reset, while A0/A1 address inputs allow up to four devices on one SPI bus.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm body width, MDP0044 footprint), RoHS-compliant, rated for –40°C to +85°C industrial temperature range.

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/SL, the X9250UV24I-2.7 uniquely supports true bipolar analog signal ranges via independent V+/V– rails, retains settings for 100 years without backup power, and provides hardware write protection-making it optimal for industrial calibration and high-reliability mixed-signal systems.

Availability

X9250UV24I-2.7 is available at Aetrix Electronics and suitable for industrial instrumentation, programmable power supplies, and audio equipment requiring stable component supply, long-term calibration retention, and bipolar analog signal handling.

Supply support for X9250UV24I-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) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.

The X9250 family was designed to replace mechanical potentiometers in automated calibration, sensor compensation, and programmable analog signal conditioning-emphasizing nonvolatility, low noise, and robust SPI control.

FAQ

What is the minimum VCC voltage supported by the X9250UV24I-2.7?

The X9250UV24I-2.7 supports a VCC range of 2.7V to 5.5V. Its "-2.7" suffix explicitly denotes compliance with 2.7V minimum operation, enabling direct use with 3.3V microcontrollers and low-voltage systems without level translation. This is confirmed in the Ordering Information table and RECOMMENDED OPERATING CONDITIONS section of FN8165 Rev.3.00.

Does the X9250UV24I-2.7 support bipolar analog signals?

Yes, the X9250UV24I-2.7 supports true bipolar operation via dedicated V+ and V– pins, rated from –2.7V to –5.5V and +2.7V to +5.5V respectively. This allows wiper voltages to swing across the full range between these rails, enabling use in AC-coupled circuits, op-amp offset nulling, and other applications requiring negative signal handling-distinct from single-supply digital pots.

How many nonvolatile registers does each potentiometer in the X9250UV24I-2.7 have?

Each of the four potentiometers in the X9250UV24I-2.7 has four independent 8-bit nonvolatile Data Registers (DR0–DR3). These store wiper positions or system parameters with 100-year retention and 100,000 write cycles per bit. DR0 is automatically loaded to the volatile Wiper Counter Register (WCR) at power-up, ensuring repeatable startup behavior without host intervention.

What is the purpose of the HOLD pin on the X9250UV24I-2.7?

The HOLD pin on the X9250UV24I-2.7 pauses ongoing SPI communication without resetting the internal command state. When asserted LOW while SCK is LOW, it freezes data transfer mid-sequence; bringing HOLD HIGH (with SCK still LOW) resumes exactly where it left off. This enables time-critical host systems to defer servicing without aborting multi-byte instructions like Global XFR or Increment/Decrement.

Can the X9250UV24I-2.7 be used as a two-terminal variable resistor?

Yes, the X9250UV24I-2.7 can operate as a two-terminal variable resistor by connecting either VHx or VLx to the wiper VWx and using the remaining terminal as the variable node. The datasheet explicitly states this configuration is supported, and the 40Ω typical wiper resistance ensures minimal series impedance impact. This mode is commonly used in current-limiting, LED brightness control, and programmable load applications.