Renesas X9118TV14-2.7

Overview

X9118TV14-2.7 from Intersil is a single digitally controlled potentiometer (XDCP™) with 1024-tap resolution, 100kΩ end-to-end resistance, and 2-wire serial interface. It operates from 2.7V to 5.5V system supply (VCC), supports analog voltage rails from –5V to +5V (V+/V−), and delivers wiper resistance of 40Ω typical at 5V - enabling precision DC biasing and gain control in sensor signal conditioning and voltage regulator feedback loops.

For engineers reviewing the X9118TV14-2.7 datasheet, X9118TV14-2.7 pinout, X9118TV14-2.7 application, or X9118TV14-2.7 equivalent, this device serves as a drop-in digital replacement for mechanical potentiometers in industrial temperature control, LCD contrast adjustment, and RF power amplifier biasing - where nonvolatile storage of four independent wiper positions and power-on recall of DR0 are critical design requirements.

Technical Context

The X9118TV14-2.7 implements a 1023-element resistor array with CMOS transmission-gate switches controlled by a volatile 10-bit Wiper Counter Register (WCR). Its 2-wire bus interface uses open-drain SDA and edge-triggered SCL, supporting up to 4 devices via A1/A0 address pins and hardware write protection via WP.

It features four nonvolatile 10-bit Data Registers (DR0–DR3) for persistent wiper position storage, with internal high-voltage write cycles requiring ≤10ms per register transfer. Power-up automatically loads DR0 into the WCR, while analog rail limits (V+ ≥ RH/RL ≥ V−) enforce safe operation across ±5V signal ranges.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (Pb-free, RoHS compliant, M14.173 drawing).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-100 and MCP4017T-103E/MS, the X9118TV14-2.7 uniquely combines 10-bit resolution, true ±5V analog capability, four nonvolatile registers, and power-on DR0 recall - making it the only option for industrial systems requiring field-calibrated, fail-safe analog tuning without host intervention at startup.

Availability

X9118TV14-2.7 is available at Aetrix Electronics and suitable for LCD display tuning, RF amplifier biasing, voltage regulator feedback scaling, and sensor signal conditioning requiring stable component supply across extended temperature and voltage ranges.

Supply support for X9118TV14-2.7 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) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.

The X9118TV14-2.7 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in high-reliability systems where calibration persistence, wide analog voltage range, and robust serial control are mandatory.

FAQ

What is the absolute maximum analog voltage range supported by the X9118TV14-2.7?

The X9118TV14-2.7 supports V+ up to +5.5V and V− down to –5.5V, with an absolute maximum (V+) – (V−) differential of 12V. RH and RL voltages must stay within V− ≤ RH/RL ≤ V+, and all analog pins tolerate –1V to +7V relative to VSS. These ratings ensure safe operation in bipolar op-amp circuits and industrial sensor interfaces without external protection components.

How does the power-on recall function work in the X9118TV14-2.7?

On power-up, the X9118TV14-2.7 automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR), establishing the initial wiper position. This occurs after VCC, V+, and V− stabilize within 1ms of each other. The X9118TV14-2.7 guarantees this behavior regardless of prior WCR state, enabling predictable startup in safety-critical voltage regulation and biasing applications.

Can the X9118TV14-2.7 be used as a two-terminal variable resistor?

Yes, the X9118TV14-2.7 can operate as a two-terminal variable resistor by connecting either RH or RL to RW (leaving the other terminal open or grounded). In this configuration, resistance between RW and the connected terminal varies from near-zero to 100kΩ in 1024 discrete steps. This mode is commonly used for programmable current limiting and gain control in transimpedance amplifiers.

What is the purpose of the WP pin on the X9118TV14-2.7?

The WP (Write Protect) pin on the X9118TV14-2.7 is an active-low hardware lock that prevents accidental or unauthorized nonvolatile writes to the four Data Registers (DR0–DR3). When WP is driven LOW, commands to write or transfer data to these registers are ignored - preserving factory calibration or user-defined settings during system operation or firmware updates.

Does the X9118TV14-2.7 require external pull-up resistors on its 2-wire bus lines?

Yes, the X9118TV14-2.7 requires external pull-up resistors on both SDA and SCL lines because SDA is open-drain and SCL is input-only. Recommended values are 2kΩ to 2.5kΩ for 400kHz operation, selected to meet rise/fall time targets while accounting for bus capacitance. Pull-ups must connect to VCC (not V+ or V−) to ensure proper logic-level compatibility with standard I²C masters.