Renesas X9271TV14IZ-2.7

Overview

X9271TV14IZ-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 operation from 2.7V to 5.5V. It functions as a three-terminal potentiometer or two-terminal variable resistor for precision DC biasing, gain control, and offset trimming in analog signal paths.

For engineers reviewing the X9271TV14IZ-2.7 datasheet, X9271TV14IZ-2.7 pinout, X9271TV14IZ-2.7 application, or X9271TV14IZ-2.7 equivalent, this device supports power-on recall of wiper position from nonvolatile DR0, offers <3µA standby current, integrates 16 nonvolatile data registers, and delivers 0.4% resolution with ±1 MI absolute linearity - critical for sensor conditioning and voltage regulator feedback networks.

Technical Context

The X9271TV14IZ-2.7 implements a monolithic CMOS resistor ladder of 255 segments with CMOS switches selecting one of 256 tap points via an 8-bit volatile Wiper Counter Register (WCR). Its SPI interface complies with standard hardware conventions: SI latched on SCK rising edge, SO clocked out on falling edge, and CS/HOLD/ WP enabling serial sequence control and hardware write protection.

Power-up behavior is deterministic: VCC stabilization triggers automatic loading of DR0 contents into the WCR, ensuring repeatable startup wiper position. Nonvolatile writes require high-voltage internal cycles (5–10 ms), monitored via the WIP status bit, and are inhibited when WP is low - supporting robust configuration storage in industrial environments.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4mm width), RoHS-compliant Pb-free plus anneal finish (e3 termination), MSL Level 3 per JEDEC J-STD-020.

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 X9271TV14IZ-2.7 uniquely combines SPI interface, 16 nonvolatile registers, hardware write protection, and deterministic power-on recall - making it optimal for industrial systems requiring unattended startup fidelity and field-serviceable calibration sets.

Availability

X9271TV14IZ-2.7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, programmable power supplies, audio volume control, and precision analog calibration requiring stable component supply across extended temperature ranges (-40°C to +85°C).

Supply support for X9271TV14IZ-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 ICs for industrial, automotive, and communications markets.

The X9271 product line delivers digitally controlled potentiometers optimized for precision analog trimming, DC biasing, and gain adjustment in harsh-environment applications where reliability, nonvolatile configuration, and low power are mandatory.

FAQ

What is the operating voltage range for the X9271TV14IZ-2.7?

The X9271TV14IZ-2.7 operates from 2.7V to 5.5V, supporting both 3.3V and 5V logic systems without external level shifters. This range is explicitly defined in the Absolute Maximum Ratings table and validated across the full -40°C to +85°C industrial temperature range. Operation outside this window may impair power-on recall or increase wiper resistance variation.

Does the X9271TV14IZ-2.7 retain its wiper position after power cycling?

Yes - the X9271TV14IZ-2.7 automatically loads the contents of nonvolatile Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) at power-up, ensuring repeatable startup position. This behavior is guaranteed provided VCC ramps at ≥0.2 V/ms and remains more positive than all analog terminal voltages (RH, RL, RW) during power transition.

How many nonvolatile registers does the X9271TV14IZ-2.7 include?

The X9271TV14IZ-2.7 includes 16 nonvolatile data registers organized in four banks of four registers each. Bank 0 (DR0–DR3) supports direct transfer to the WCR; Banks 1–3 provide additional SPI-accessible memory for system parameters or user preferences, though they cannot drive the wiper directly.

Can the X9271TV14IZ-2.7 be used as a two-terminal variable resistor?

Yes - the X9271TV14IZ-2.7 supports both three-terminal potentiometer (RH–RW–RL) and two-terminal variable resistor (e.g., RH–RW or RW–RL) configurations. In two-terminal mode, it replaces mechanical trimmers for gain control, bias setting, or impedance matching, with wiper resistance (150Ω typ. at 5V) contributing directly to total resistance.

What is the maximum SPI clock frequency supported by the X9271TV14IZ-2.7?

The X9271TV14IZ-2.7 supports a maximum SPI clock frequency of 2.5MHz, as specified in the AC Timing table. At this rate, instruction cycles complete within defined setup/hold windows (tSU/tH = 50ns), and SO output validity (tV = 200ns) ensures reliable data capture by standard SPI peripherals without added timing margins.