Renesas X9271UV14IZ-2.7

Overview

X9271UV14IZ-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 analog trimming in sensor signal conditioning, voltage regulator feedback, and audio gain control.

For engineers reviewing the X9271UV14IZ-2.7 datasheet, X9271UV14IZ-2.7 pinout, X9271UV14IZ-2.7 application, or X9271UV14IZ-2.7 equivalent, key selection criteria include its 2.7–5.5V supply range, industrial temperature rating (−40°C to +85°C), 14-lead TSSOP package, nonvolatile data register storage, and power-on recall of DR0 to wiper counter register.

Technical Context

The X9271UV14IZ-2.7 implements a 255-element resistive ladder with CMOS switches controlled by an 8-bit volatile Wiper Counter Register (WCR), enabling precise 0.4% resolution wiper positioning. Its SPI interface supports read/write/transfer operations including increment/decrement commands for real-time fine-tuning.

Four nonvolatile 8-bit data registers (DR0–DR3) store wiper positions or system parameters; DR0 is automatically loaded into the WCR at power-up. Hardware write protection (WP) and HOLD functionality enable robust multi-device bus operation, while standby current remains below 3µA.

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-2.7 uniquely combines 2.7–5.5V operation, SPI interface, 50kΩ resistance, and automatic DR0-to-WCR power-on recall - making it optimal for industrial systems requiring robust, self-initializing analog trimming.

Availability

X9271UV14IZ-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, and audio subsystems requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for X9271UV14IZ-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 series was designed as a drop-in replacement for mechanical potentiometers in precision analog control applications, emphasizing nonvolatile configuration storage, low-power operation, and robust SPI interoperability.

FAQ

What is the minimum supply voltage required for reliable operation of the X9271UV14IZ-2.7?

The X9271UV14IZ-2.7 operates reliably from 2.7V to 5.5V. At 2.7V, all specifications-including wiper resistance (300Ω typical), SPI timing (2.5MHz max), and nonvolatile write endurance-remain fully guaranteed across the −40°C to +85°C temperature range. This makes the X9271UV14IZ-2.7 suitable for battery-powered and low-voltage industrial systems where headroom is constrained.

Does the X9271UV14IZ-2.7 retain its wiper position after power cycling?

Yes-the X9271UV14IZ-2.7 automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) at power-up. DR0 is nonvolatile and retains its value for 100 years at +85°C, ensuring the X9271UV14IZ-2.7 resumes its last calibrated setting without host intervention after every power cycle.

Can multiple X9271UV14IZ-2.7 devices share the same SPI bus?

Yes-up to four X9271UV14IZ-2.7 devices can operate on a single SPI bus using hardware address pins A1 and A0. Each device responds only to commands matching its unique 2-bit slave address, enabling coordinated analog trimming across multiple channels or subsystems without additional GPIO overhead.

What is the maximum allowable voltage across the RH–RL terminals of the X9271UV14IZ-2.7?

The absolute maximum voltage difference between RH and RL is 5.5V (ΔV = |VH − VL| ≤ 5.5V), and both terminals must remain within VSS ≤ VRH, VRL ≤ VCC. This constraint ensures safe operation when used in voltage divider or variable-resistor configurations with external biasing, preventing latch-up or resistor array damage.

How does the HOLD pin function during SPI communication with the X9271UV14IZ-2.7?

The HOLD pin pauses an ongoing SPI transaction without resetting internal state: when asserted LOW (with SCK LOW), it suspends data transfer; when returned HIGH (SCK still LOW), communication resumes from the exact point of interruption. This enables time-critical MCU tasks to preempt bus access while preserving command integrity-critical in multi-peripheral real-time systems using the X9271UV14IZ-2.7.