Renesas X9279TV14I-2.7

Overview

X9279TV14I-2.7 from Intersil is a single-supply, low-power, 256-tap digitally controlled potentiometer (XDCP™) with 2-wire serial interface, 100 kΩ end-to-end resistance, -40°C to +85°C industrial temperature range, and 14-lead TSSOP package. It functions as a programmable three-terminal potentiometer or two-terminal variable resistor for precision analog trimming in sensor conditioning, voltage regulation, and audio gain control.

For engineers reviewing the X9279TV14I-2.7 datasheet, X9279TV14I-2.7 pinout, X9279TV14I-2.7 application, or X9279TV14I-2.7 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-grade operating conditions, and real-world use cases for analog parameter adjustment in embedded systems requiring stable, non-volatile wiper position storage and 2.7V–5.5V supply compatibility.

Technical Context

The X9279TV14I-2.7 implements a monolithic CMOS resistor array of 255 segments with CMOS-switched wiper taps, controlled via an I²C-compatible 2-wire bus (SCL/SDA). Its volatile 8-bit Wiper Counter Register (WCR) directly selects one of 256 tap positions, while four non-volatile Data Registers (DR0–DR3) store wiper settings with 100-year retention.

Power-on recall loads DR0 into the WCR; hardware write protection (WP pin) disables non-volatile writes. The device supports increment/decrement commands for fine-grained wiper adjustment and operates across 2.7V–5.5V with standby current <5 µA, enabling battery-powered and industrial applications demanding low quiescent power and robust EEPROM endurance (100,000 cycles).

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4 mm wide), RoHS-compliant, Pb-free option available (M14.173 drawing).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL95810 and MCP45HV51-103, the X9279TV14I-2.7 uniquely combines industrial temperature rating, hardware write protection, power-on DR0 recall, and compact 14-lead TSSOP in a single 2.7–5.5 V solution-making it optimal for space-constrained, safety-critical trimming in factory automation and sensor modules.

Availability

X9279TV14I-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback networks, and audio gain control circuits requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9279TV14I-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

Intersil (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X9279 product line delivers digitally controlled potentiometers optimized for industrial-grade trimming, replacing mechanical pots with non-volatile, software-configurable resistance in harsh environments.

FAQ

What is the supply voltage range supported by the X9279TV14I-2.7?

The X9279TV14I-2.7 operates from 2.7 V to 5.5 V, making it compatible with both 3.3 V and 5 V system rails. This range is explicitly defined in the Ordering Information table and Absolute Maximum Ratings section of the datasheet, and differs from the standard 5 V ±10% version. The "-2.7" suffix denotes this extended low-voltage capability, critical for battery-powered and low-power industrial designs.

Does the X9279TV14I-2.7 support hardware write protection?

Yes, the X9279TV14I-2.7 includes a dedicated Hardware Write Protect (WP) pin (Pin 8). When pulled LOW, it disables all non-volatile writes to the Data Registers (DR0–DR3), preventing accidental corruption of calibrated trim values. This feature is documented in the Pin Functions section and Functional Diagram, and is active regardless of I²C command sequence-providing robust, pin-level security not dependent on software state.

How does power-on behavior work for the X9279TV14I-2.7?

On power-up, the X9279TV14I-2.7 automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR), restoring the last-saved wiper position without host intervention. This power-on recall function is guaranteed across the full -40°C to +85°C temperature range and is independent of I²C bus activity, ensuring deterministic startup behavior in industrial systems.

What is the end-to-end resistance and tolerance of the X9279TV14I-2.7?

The X9279TV14I-2.7 has a nominal end-to-end resistance of 100 kΩ with a tolerance of ±20%, as specified in the Analog Characteristics table under "End-to-End Resistance Tolerance." This value applies to the "T" version (denoted in the part number prefix), and is measured across RH and RL terminals. The 100 kΩ value defines the total resistive span used for voltage division or variable resistance applications.

Can the X9279TV14I-2.7 be used in a two-terminal configuration?

Yes, the X9279TV14I-2.7 can operate as a two-terminal variable resistor by connecting either RH or RL to the wiper (RW) terminal, effectively using only two pins. This configuration is explicitly supported in the device description and Functional Diagram, and maintains full 256-tap resolution and non-volatile storage capability-enabling compact implementations in current-source biasing or gain-setting networks where three-terminal operation is unnecessary.