Renesas X9119TV14I

Overview

X9119TV14I from Intersil is a 1024-tap, low-power, digitally controlled potentiometer (XDCP™) with 2-wire serial interface, 100kΩ end-to-end resistance, ±20% tolerance, and 14-lead TSSOP package. It functions as a volatile wiper-controlled resistor array with four nonvolatile data registers, enabling programmable gain control in voltage amplifiers and DC bias adjustment in RF power amplifiers.

For engineers reviewing the X9119TV14I datasheet, X9119TV14I pinout, X9119TV14I application, or X9119TV14I equivalent, this device supports precise 10-bit resolution trimming of analog circuits across industrial temperature range (–40°C to +85°C), operates from 2.7V to 5.5V, and features hardware write protection via WP pin for register integrity during system operation.

Technical Context

The X9119TV14I implements a monolithic CMOS resistor array of 1023 series-connected elements with CMOS-switched wiper access at 1024 tap points. Its Wiper Counter Register (WCR) directly controls wiper position and is volatile, while DR0–DR3 are nonvolatile 10-bit registers supporting up to 100,000 write cycles and 100-year data retention.

Communication occurs over a standard 2-wire bus (SCL/SDA) with slave address defined by A0–A2 pins, supporting read/write of WCR and data registers, plus transfer instructions between them. Power-on recall loads DR0 into WCR, and hardware write protection (WP) disables nonvolatile writes when asserted low.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4mm width), RoHS-compliant, M14.173 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-100 and MCP45HV51-103E/ST, the X9119TV14I provides superior 10-bit resolution, dedicated hardware write protection, and guaranteed 100kΩ resistance matching for precision gain-setting-making it optimal for industrial sensor calibration and RF bias control where repeatability and register security are critical.

Availability

X9119TV14I is available at Aetrix Electronics and suitable for industrial sensor conditioning, RF power amplifier biasing, and programmable voltage regulator applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9119TV14I 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 X9119 product line delivers digitally programmable analog front-end components optimized for calibration-critical systems-designed to replace mechanical potentiometers with reliable, software-configurable resistance in harsh environments.

FAQ

What is the default wiper position after power-up for the X9119TV14I?

The X9119TV14I loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) at power-up. This behavior is called power-on recall and ensures consistent startup wiper position without host intervention. DR0 must be pre-programmed with the desired initial value during manufacturing or field calibration. The X9119TV14I does not retain WCR state across power cycles unless explicitly stored to DR0.

Can the X9119TV14I operate reliably at 3.3V supply voltage?

Yes, the X9119TV14I supports VCC from 2.7V to 5.5V, making it fully compatible with 3.3V systems. At 3.3V, wiper resistance increases to 150–300Ω (vs 40Ω at 5V), which remains acceptable for most gain-setting and bias applications. All timing and functional specifications-including 400kHz 2-wire operation and nonvolatile write endurance-are guaranteed across this full voltage range.

How does the hardware write protect (WP) pin function on the X9119TV14I?

The WP pin on the X9119TV14I is an active-low input that disables all nonvolatile writes to DR0–DR3 when pulled low. It has no effect on volatile WCR writes or reads. This allows system-level protection against accidental register corruption during normal operation or firmware updates. The X9119TV14I continues to respond to all commands but rejects any instruction targeting nonvolatile memory when WP is asserted.

What is the maximum number of X9119TV14I devices that can share a single 2-wire bus?

Up to eight X9119TV14I devices can share one 2-wire bus, enabled by the three address pins A0–A2. Each combination of A0/A1/A2 sets a unique 3-bit LSB for the 7-bit slave address (ID bits 0101xxx). The X9119TV14I only responds to commands matching its configured address, allowing independent control of multiple units without additional select lines or bus arbitration.

Does the X9119TV14I support true 3-terminal potentiometer operation?

Yes, the X9119TV14I supports both 3-terminal potentiometer mode (RH–RW–RL) and 2-terminal variable resistor mode (RH–RW or RW–RL). In 3-terminal mode, it functions as a programmable voltage divider with 100kΩ total resistance and ≤110Ω wiper resistance. The device maintains monotonicity and linearity specs across the full 1024-tap range in either configuration, as verified in the datasheet's absolute and relative linearity tests.