Renesas X9271UV14IZ-2.7T1

Overview

X9271UV14IZ-2.7T1 from Intersil (now Renesas) is a single-channel, digitally controlled potentiometer (XDCP™) with 256-tap resolution, SPI interface, 50kΩ end-to-end resistance, and operation from 2.7V to 5.5V. It functions as a programmable three-terminal potentiometer or two-terminal variable resistor in precision analog signal conditioning, DC bias trimming, and gain control circuits.

For engineers reviewing the X9271UV14IZ-2.7T1 datasheet, X9271UV14IZ-2.7T1 pinout, X9271UV14IZ-2.7T1 application, or X9271UV14IZ-2.7T1 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial temperature range (–40°C to +85°C), nonvolatile wiper position storage, and real-world circuit-level use cases for embedded sensor interfaces and power management systems.

Technical Context

The X9271UV14IZ-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 bus supports read/write/transfer operations across four nonvolatile data registers and includes hardware write protection (WP) and HOLD functionality for serial bus pause.

Power-on recall loads DR0 into the WCR, enabling deterministic startup behavior. The device features <3µA standby current, 100-year data retention, and 100,000 write cycles per register bit - all within a 14-lead TSSOP package rated for industrial temperature operation.

Key Specifications

Pinout & Package

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

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 X9271UV14IZ-2.7T1 offers higher 50kΩ impedance for reduced current draw in high-side bias networks, industrial temperature qualification, and four dedicated nonvolatile registers for storing multiple calibrated settings - making it optimal for field-deployed industrial sensors and programmable power supplies.

Availability

X9271UV14IZ-2.7T1 is available at Aetrix Electronics and suitable for industrial motor control, sensor signal conditioning, and programmable power supply applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for X9271UV14IZ-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

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

The X9271 product line delivers digitally programmable analog front-end components optimized for precision trimming, calibration, and dynamic gain control in harsh-environment embedded systems.

FAQ

What is the default wiper position after power-up for the X9271UV14IZ-2.7T1?

The X9271UV14IZ-2.7T1 loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) at power-up. This enables deterministic startup behavior without host intervention. DR0 is pre-programmed during manufacturing or can be written by the user; its value directly determines the initial analog output at RW upon power application.

Does the X9271UV14IZ-2.7T1 support true 3-wire SPI operation with shared SI/SO lines?

Yes, the X9271UV14IZ-2.7T1 supports 3-wire SPI operation because both SI and SO pins have three-state outputs. They can be connected together on a single bidirectional data line, reducing MCU pin count. The device automatically tri-states SO during write operations and enables SO during read cycles, eliminating need for external direction control logic.

How many nonvolatile write cycles does the X9271UV14IZ-2.7T1 guarantee per register bit?

The X9271UV14IZ-2.7T1 guarantees 100,000 nonvolatile write cycles per bit in each of its four 8-bit data registers. Each write to a register triggers a high-voltage internal programming cycle lasting up to 10ms, during which the WIP bit remains asserted. This endurance rating applies across the full industrial temperature range (–40°C to +85°C).

Can the X9271UV14IZ-2.7T1 operate reliably at 3.3V supply while maintaining full 256-tap resolution?

Yes, the X9271UV14IZ-2.7T1 is fully specified for operation from 2.7V to 5.5V, including 3.3V nominal rails. All parameters - including 256-tap resolution, 150Ω typical wiper resistance, SPI timing (2.5MHz max), and nonvolatile write functionality - are guaranteed across this entire voltage range per the FN8174 Rev 5.00 datasheet.

What is the maximum allowable voltage differential between RH and RL pins on the X9271UV14IZ-2.7T1?

The absolute maximum voltage difference between RH and RL pins on the X9271UV14IZ-2.7T1 is 5.5V, as defined by the ΔV = |(VH − VL)| specification. Exceeding this limit risks irreversible damage to the internal resistor array. Additionally, both RH and RL must remain within VSS to VCC to prevent latch-up or leakage current issues.