Renesas X9271TV14T1

Overview

X9271TV14T1 from Intersil (now Renesas) is a single-supply, low-power, 256-tap digitally controlled potentiometer (XDCP™) with SPI interface, 50kΩ end-to-end resistance, ±20% tolerance, and 14-lead TSSOP package. It functions as a programmable three-terminal potentiometer or two-terminal variable resistor for precision analog trimming in voltage regulators, sensor signal conditioning, and audio gain control.

For engineers reviewing the X9271TV14T1 datasheet, X9271TV14T1 pinout, X9271TV14T1 application, or X9271TV14T1 equivalent, key selection criteria include its 2.7V–5.5V supply range, <3µA standby current, nonvolatile wiper position storage across 16 registers, power-on recall from DR0, and SPI-compatible serial interface with hardware write protect and HOLD functionality.

Technical Context

The X9271TV14T1 implements a monolithic CMOS resistor ladder of 255 segments with CMOS-switched wiper access controlled by an 8-bit volatile Wiper Counter Register (WCR). Its SPI bus supports read/write/transfer operations to both the WCR and four nonvolatile data registers per bank, with full register banking (16 total registers across 4 banks).

Power-up behavior loads DR0 into the WCR; nonvolatile writes require CS high-to-low transition and complete within 10ms. The device supports increment/decrement mode for real-time fine-tuning and includes hardware write protection (WP), chip select (CS), and HOLD for serial bus pause-enabling robust integration in embedded analog-digital hybrid systems.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4mm body width, M14.173 drawing), RoHS-compliant Pb-free plus anneal finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ10 and MCP41010-I/P, the X9271TV14T1 uniquely delivers 50kΩ resistance, 16 nonvolatile registers, and HOLD functionality-making it optimal for industrial voltage regulation and multi-point sensor calibration where robustness and configurability are essential.

Availability

X9271TV14T1 is available at Aetrix Electronics and suitable for voltage regulator trimming, sensor signal conditioning, audio gain control, and RF bias adjustment requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for X9271TV14T1 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 (formerly Intersil) is a global semiconductor leader specializing in microcontrollers, analog power, and mixed-signal solutions for industrial, automotive, and communications markets.

The X9271TV14T1 belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in precision analog control loops requiring nonvolatile setting retention and digital configurability.

FAQ

What is the operating voltage range for the X9271TV14T1?

The X9271TV14T1 operates from 2.7V to 5.5V on VCC. This range supports direct interfacing with both 3.3V and 5V microcontrollers and analog circuits. Operation outside this range may damage the device or cause undefined behavior, and VCC must always be ≥ RH, RL, and RW voltages per absolute maximum ratings.

Does the X9271TV14T1 retain its wiper position after power cycling?

Yes-the X9271TV14T1 automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) on power-up. DR0 is nonvolatile and retains its value for 100 years, ensuring repeatable startup behavior without host intervention.

How many nonvolatile registers does the X9271TV14T1 have, and what are they used for?

The X9271TV14T1 contains 16 nonvolatile data registers organized in four banks of four registers each. These store wiper positions or user-defined system parameters. Only Bank 0 registers support direct transfer to the WCR; Banks 1–3 serve as general-purpose nonvolatile memory for calibration data or configuration flags.

Can the X9271TV14T1 be used as a two-terminal variable resistor?

Yes-the X9271TV14T1 supports two-terminal operation by connecting either RH or RL to the wiper (RW), effectively creating a digitally adjustable rheostat. This configuration is commonly used in LED current control, oscillator frequency tuning, and programmable current sources.

What is the maximum SPI clock frequency supported by the X9271TV14T1?

The X9271TV14T1 supports SPI clock frequencies up to 2.5MHz. At this rate, instruction execution and wiper repositioning occur within microseconds, enabling real-time adjustments in closed-loop control systems. Timing parameters such as tSU, tH, and tV are fully specified in the datasheet for reliable interface design.