Renesas X9271TV14I-2.7

Overview

X9271TV14I-2.7 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 2.7V to 5.5V operation. It functions as a three-terminal potentiometer or two-terminal variable resistor for precision analog trimming in embedded sensor signal conditioning and DC bias control circuits.

For engineers reviewing the X9271TV14I-2.7 datasheet, X9271TV14I-2.7 pinout, X9271TV14I-2.7 application, or X9271TV14I-2.7 equivalent, this page delivers verified specifications, validated SPI timing behavior, confirmed nonvolatile register architecture, and real-world use cases in LCD contrast adjustment, voltage regulator setpoint trimming, and audio gain control - all grounded in FN8174 Rev 5.00.

Technical Context

The X9271TV14I-2.7 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 clock frequency, with hardware write protection (WP) and HOLD pause functionality.

Power-up automatically loads the default data register (DR0) into the WCR, enabling deterministic startup behavior. Four nonvolatile 8-bit data registers (Bank 0 only) support storage of multiple wiper positions, with 100,000 write cycles per bit and 100-year data retention - critical for calibration-critical industrial systems requiring long-term parameter stability.

Key Specifications

Pinout & Package

14-lead TSSOP (4.4mm body width, M14.173 package drawing), RoHS-compliant with matte tin anneal finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ50 and MCP41050-I/P, the X9271TV14I-2.7 uniquely combines SPI interface, hardware write protection, HOLD functionality, and four nonvolatile registers - making it optimal for industrial systems requiring tamper-resistant, self-recalling analog configuration without host intervention.

Availability

X9271TV14I-2.7 is available at Aetrix Electronics and suitable for LCD display calibration, voltage regulator trimming, audio gain control, sensor offset compensation, and industrial HMI applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9271TV14I-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

Renesas Electronics (formerly Intersil) is a global semiconductor leader specializing in analog, mixed-signal, and power management solutions for industrial, automotive, and communications markets.

The X9271TV14I-2.7 belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in calibration-critical systems where long-term stability, nonvolatile storage, and digital configurability are mandatory.

FAQ

What is the guaranteed power-up behavior of the X9271TV14I-2.7?

The X9271TV14I-2.7 guarantees that upon power-up, the contents of Data Register 0 (DR0) are automatically loaded into the volatile Wiper Counter Register (WCR), establishing a known wiper position within 1ms. This behavior is hardware-enforced and does not require host initialization, ensuring repeatable startup conditions for safety-critical analog circuits. The X9271TV14I-2.7 maintains this recall function across its full -40°C to +85°C industrial temperature range.

Can the X9271TV14I-2.7 operate reliably at 2.7V supply voltage?

Yes, the X9271TV14I-2.7 is fully specified for operation from 2.7V to 5.5V, with all electrical characteristics - including 2.5MHz SPI clock support, <3µA standby current, and 150Ω typical wiper resistance - validated at VCC = 2.7V. Its low-voltage capability enables direct integration into 3.3V and battery-powered systems without external regulators, and the device meets all timing and noise specifications across this range per FN8174 Rev 5.00.

How many nonvolatile write cycles does the X9271TV14I-2.7 support?

The X9271TV14I-2.7 supports 100,000 data changes per bit per register, as verified in accelerated life testing. Each of its four 8-bit nonvolatile data registers (DR0–DR3) can endure this number of individual write operations while maintaining 100-year data retention. This endurance rating applies to both full-register writes and partial-bit updates, making the X9271TV14I-2.7 suitable for field calibration routines executed thousands of times over product lifetime.

Does the X9271TV14I-2.7 require external pull-up resistors on its SPI lines?

No, the X9271TV14I-2.7 does not require external pull-ups on SO, SI, or SCK. Its SPI interface uses CMOS-compatible inputs with VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC, and SO is actively driven three-state output. Pull-ups are only needed if bus sharing or open-drain arbitration is implemented externally - which is unnecessary for point-to-point connections. The X9271TV14I-2.7 operates correctly with standard microcontroller SPI peripherals driving directly to its pins.

What is the maximum permissible voltage across RH and RL terminals of the X9271TV14I-2.7?

The absolute maximum voltage difference |VH − VL| across RH and RL terminals is 5.5V, as specified in the Absolute Maximum Ratings table. This limit holds regardless of VCC level and applies to both DC and transient conditions. Exceeding this voltage risks irreversible damage to the internal resistor array. The X9271TV14I-2.7 must be used with VH and VL referenced to VSS and bounded such that VCC ≥ VH, VL, and VW - a constraint explicitly enforced in all recommended operating conditions.