Renesas X9118TV14I

Overview

X9118TV14I from Intersil is a single-channel, 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 ±5V analog rails (V+/V−), and delivers wiper resistance of 40Ω typical at 5V - used for precision gain control in voltage amplifiers and DC bias trimming in sensor signal conditioning circuits.

For engineers reviewing the X9118TV14I datasheet, X9118TV14I pinout, X9118TV14I application, or X9118TV14I equivalent, key selection considerations include its volatile wiper counter register with power-on recall from non-volatile DR0, four independent 10-bit non-volatile data registers, 15µA standby current, and 14-lead TSSOP package with verified 2-wire bus timing compliance up to 400kHz.

Technical Context

The X9118TV14I implements a monolithic CMOS resistor ladder of 1023 segments with CMOS transmission-gate switches controlled by a 10-bit wiper counter register (WCR). Wiper position is set via direct write, or transferred from any of four non-volatile data registers (DR0–DR3), with automatic DR0→WCR load at power-up.

Its 2-wire interface uses open-drain SDA with external pull-up (2–2.5kΩ typical), SCL clock input, dual address pins (A0/A1) enabling up to four devices on one bus, and hardware write-protect (WP) disabling nonvolatile writes when low. Analog operation is isolated: V+ and V− define the potentiometer's voltage swing range independently of VCC/VSS.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (Pb-free, M14.173 drawing), 5.0mm × 4.4mm × 1.2mm body, 0.65mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-100 and MCP41HV51-103, the X9118TV14I uniquely combines bipolar ±5.5V analog operation, four nonvolatile registers, and power-on DR0 recall - making it the only option among the three that supports self-contained, zero-initialization calibration in mixed-signal industrial systems.

Availability

X9118TV14I is available at Aetrix Electronics and suitable for precision sensor signal conditioning, programmable power supply feedback, and audio gain control applications requiring stable component supply, long-term calibration retention, and bipolar analog interface capability.

Supply support for X9118TV14I 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 systems.

The X9118 product line delivers digitally programmable analog components optimized for calibration-critical applications - designed to replace mechanical potentiometers while providing nonvolatile storage, remote configuration, and extended reliability in harsh environments.

FAQ

What is the absolute maximum analog voltage range supported by the X9118TV14I?

The X9118TV14I supports V+ up to +5.5V and V− down to −5.5V, with (V+) – (V−) ≤ 12V. RH and RL voltages must stay within this range - specifically, RH ≤ V+ and RL ≥ V−. This allows true bipolar operation, unlike many digital potentiometers limited to 0–VCC analog ranges. The X9118TV14I maintains this specification across its full −40°C to +85°C industrial temperature range.

How does the power-on recall function work in the X9118TV14I?

At power-up, the X9118TV14I automatically loads the contents of non-volatile Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR), positioning the wiper accordingly. This occurs once VCC, V+, and V− all stabilize within 1ms of each other. No host intervention is needed - the X9118TV14I begins operation at a known, factory- or user-programmed setting immediately after power stabilization.

Can the X9118TV14I be used in a two-wire bus with other I²C-compatible devices?

Yes - the X9118TV14I uses a standard 2-wire (I²C-compatible) interface with open-drain SDA/SCL, 7-bit slave address (0101 A1 A0), and full ACK/NACK protocol compliance. It coexists with other I²C peripherals on the same bus, provided address bits A1/A0 are uniquely set per device. Pull-up resistors (2–2.5kΩ) must meet bus capacitance and speed requirements for 400kHz operation.

What is the wiper response time after issuing a write command to the X9118TV14I?

The X9118TV14I achieves wiper response in 8µs after instruction completion (tWRL), whether writing directly to the WCR or transferring from a data register. This fast settling enables real-time gain or bias adjustment in closed-loop systems. Note that nonvolatile writes to DR0–DR3 require 5–10ms (tWR) but do not affect wiper position until explicitly transferred.

Does the X9118TV14I require external components for basic operation?

Yes - the X9118TV14I requires external pull-up resistors on SDA and SCL (2–2.5kΩ typical), a 0.1µF ceramic decoupling capacitor between VCC and VSS, and proper routing of V+ and V− supplies to match analog signal swing. No external memory or DAC is needed, as all configuration and storage reside on-chip - including four 10-bit nonvolatile registers and power-on DR0 recall.