Renesas X9271TV14I-2.7T1

Overview

X9271TV14I-2.7T1 from Intersil (now Renesas) is a single-channel, 256-tap, SPI-controlled digital potentiometer with 50kΩ end-to-end resistance, 2.7V–5.5V supply operation, and nonvolatile storage of four wiper positions. It functions as a programmable three-terminal potentiometer or two-terminal variable resistor in precision analog signal conditioning circuits.

For engineers reviewing the X9271TV14I-2.7T1 datasheet, X9271TV14I-2.7T1 pinout, X9271TV14I-2.7T1 application, or X9271TV14I-2.7T1 equivalent, key selection criteria include its industrial temperature range (−40°C to +85°C), 100-year data retention, 100,000-cycle endurance per register, 3µA standby current, and TSSOP-14 package compatibility with space-constrained PCB layouts.

Technical Context

The X9271TV14I-2.7T1 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 read/write/transfer operations at up to 2.5MHz, with hardware write protection (WP) and HOLD functionality for bus arbitration.

Power-up behavior loads the default data register (DR0) into the WCR, enabling deterministic startup wiper position. The device features four nonvolatile 8-bit data registers (Bank 0 only usable for WCR transfers), 10ms max nonvolatile write time, and ratiometric temperature coefficient of 20ppm/°C for stable voltage-divider performance across temperature.

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-2.7T1 uniquely combines industrial temperature rating, SPI HOLD/WP support, four nonvolatile registers, and guaranteed power-on recall-making it optimal for field-deployed equipment requiring unattended recalibration and fail-safe startup behavior.

Availability

X9271TV14I-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical instrument trimming, and telecom power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9271TV14I-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 (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-2.7T1 belongs to Intersil's XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in automated calibration, closed-loop control, and programmable analog signal path applications.

FAQ

What is the operating temperature range for the X9271TV14I-2.7T1?

The X9271TV14I-2.7T1 is rated for industrial operation from −40°C to +85°C. This range is confirmed in the Ordering Information table and Recommended Operating Conditions section of the FN8174 datasheet. It ensures reliable performance in harsh environments such as factory automation controllers and outdoor telecom equipment where ambient temperatures exceed commercial limits.

Does the X9271TV14I-2.7T1 support true power-on recall of wiper position?

Yes, the X9271TV14I-2.7T1 automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) at power-up. This behavior is explicitly documented in the "Principles of Operation" and "Wiper Counter Register" sections of the datasheet and does not require host intervention, ensuring deterministic startup wiper position every time.

Can the X9271TV14I-2.7T1 be used with a 3.3V microcontroller SPI interface?

Yes, the X9271TV14I-2.7T1 operates from 2.7V to 5.5V and specifies VIH = VCC × 0.7 and VIL = VCC × 0.3. At VCC = 3.3V, this yields VIH ≥ 2.31V and VIL ≤ 0.99V - fully compatible with standard 3.3V CMOS logic levels. No level-shifting circuitry is required for direct connection to 3.3V SPI masters.

How many nonvolatile wiper positions can the X9271TV14I-2.7T1 store?

The X9271TV14I-2.7T1 stores four independent wiper positions in its nonvolatile Data Registers (DR0–DR3), each 8-bit wide. These registers retain values for 100 years and support direct transfer to the Wiper Counter Register via SPI command, enabling factory calibration, user presets, and fail-safe recovery states without external memory.

Is the X9271TV14I-2.7T1 pin-compatible with other members of the X9271 family?

Yes, all X9271 variants-including X9271UV14IZ-2.7T1, X9271UV14IZ, and X9271UV14Z-share identical 14-lead TSSOP pinout and function mapping per the Pin Configuration diagram and Pin Descriptions table. Differences are limited to supply voltage range, temperature grade, and packaging suffixes; no PCB redesign is needed when substituting within the same package variant.