Renesas X9271TV14I

Overview

X9271TV14I from Intersil (now Renesas) is a single-channel, SPI-interface digitally controlled potentiometer (XDCP™) with 256-tap resolution, 50kΩ end-to-end resistance, and 14-lead TSSOP package. It operates from 2.7V to 5.5V, features <3µA standby current, nonvolatile storage of 16 data registers, and power-on recall of DR0 to the volatile wiper counter register. It serves as a programmable three-terminal potentiometer or two-terminal variable resistor in precision analog trimming applications.

For engineers reviewing the X9271TV14I datasheet, X9271TV14I pinout, X9271TV14I application, or X9271TV14I equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in sensor conditioning and voltage regulation, and validated alternative parts for design continuity and supply resilience.

Technical Context

The X9271TV14I 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 interface supports full-duplex read/write/transfer operations at up to 2.5MHz, with hardware write protection (WP), hold functionality (HOLD), and dual device address inputs (A0/A1) for multi-device bus configuration.

It integrates four nonvolatile data registers per bank (16 total across four banks), but only Bank 0 registers support direct transfer to the WCR. Power-up automatically loads DR0 from Bank 0 into the WCR, enabling deterministic startup behavior without host initialization. Wiper resistance is 150Ω typical at VCC = 5V, and absolute linearity is ±1 LSB (±1 MI).

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4mm body width), 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 X9271TV14I uniquely combines SPI interface, 50kΩ resistance, 16 nonvolatile registers, and hardware write protection - making it optimal for industrial systems requiring deterministic startup, field recalibration, and robust bus operation.

Availability

X9271TV14I is available at Aetrix Electronics and suitable for precision analog trimming, sensor calibration, and programmable power supply applications requiring stable component supply, long-term data retention, and industrial temperature performance.

Supply support for X9271TV14I 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 (acquired by Renesas Electronics in 2017) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X9271TV14I belongs to Intersil's XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in automated calibration, adaptive signal conditioning, and digitally tunable analog circuits.

FAQ

What is the operating voltage range for the X9271TV14I?

The X9271TV14I operates from 2.7V to 5.5V, supporting both 3.3V and 5V logic systems. This range is explicitly specified in the Ordering Information table and Absolute Maximum Ratings section of the FN8174 datasheet. Operation outside this window may cause undefined behavior or damage. The device is rated for industrial temperature range (-40°C to +85°C) across the full VCC span.

Does the X9271TV14I retain its wiper position after power cycling?

Yes - the X9271TV14I loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) on every power-up, ensuring repeatable startup behavior. DR0 itself is nonvolatile and retains its value for 100 years. This power-on recall function is a core feature confirmed in the Functional Diagram and Principles of Operation sections of the datasheet.

How many nonvolatile registers does the X9271TV14I have, and what are they used for?

The X9271TV14I has 16 nonvolatile data registers organized in four banks of four 8-bit registers each. These store wiper positions or general-purpose system parameters. Only Bank 0 registers support direct transfer to the WCR; Banks 1–3 are read/write-only memory. Each register supports 100,000 write cycles and 100-year data retention, as verified in the Endurance and Data Retention table.

Can multiple X9271TV14I devices share the same SPI bus?

Yes - the X9271TV14I uses a 2-bit hardware address (A1/A0 pins) to assign unique slave addresses, allowing up to four devices on a single SPI bus. The device compares incoming address bits against physical pin states before executing commands. This multi-drop capability is documented in the Pin Descriptions and Identification Byte Format sections of the datasheet.

What is the maximum SPI clock frequency supported by the X9271TV14I?

The X9271TV14I supports SPI clock frequencies up to 2.5MHz, as specified in the AC Timing table (Page 13, FN8174 Rev 5.00). This allows sub-millisecond register access and rapid wiper repositioning. Timing parameters including tSU, tH, tWH, and tWL are all guaranteed within this limit, enabling reliable operation with standard microcontroller SPI peripherals.