Renesas X9119TV14Z

Overview

X9119TV14Z from Intersil is a 1024-tap, low-power, digitally controlled potentiometer (XDCP™) with 2-wire serial interface, 100kΩ end-to-end resistance, 2.7V–5.5V supply range, and 14-lead TSSOP package. It functions as a programmable 3-terminal potentiometer or 2-terminal variable resistor for precision analog control in voltage amplifier gain setting, DC reference trimming, and sensor signal conditioning circuits.

For engineers reviewing the X9119TV14Z datasheet, X9119TV14Z pinout, X9119TV14Z application, or X9119TV14Z equivalent, this device delivers verified 10-bit resolution, nonvolatile wiper position storage across four registers, power-on recall from DR0, <3µA standby current, and hardware write protection via WP pin - all critical for embedded analog tuning and calibration stability.

Technical Context

The X9119TV14Z implements a monolithic CMOS resistor array of 1023 series-connected elements with CMOS-switched wiper access at 1024 tap points, controlled by a volatile 10-bit Wiper Counter Register (WCR). Its 2-wire interface supports read/write/transfer operations to both WCR and four nonvolatile data registers (DR0–DR3), with ACK polling for nonvolatile writes.

Power-up behavior is deterministic: DR0 contents load into WCR automatically, enabling repeatable startup wiper position. The device operates across 0°C to +70°C, supports VCC from 2.7V to 5.5V, and features hardware write protect (WP) to prevent unintended register changes during system operation.

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 AD5170BRMZ-100 and MCP41HV51-103, the X9119TV14Z provides superior 10-bit resolution, native I²C support with hardware write protection, and guaranteed 100kΩ tolerance - making it optimal for precision, low-voltage, calibration-critical analog tuning where deterministic power-up behavior and long-term nonvolatile storage are required.

Availability

X9119TV14Z is available at Aetrix Electronics and suitable for audio volume control, voltage regulator output setting, op-amp offset trim, and sensor signal conditioning applications requiring stable component supply, long-term calibration integrity, and I²C-compatible digital potentiometer functionality.

Supply support for X9119TV14Z 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 precision power management, sensing, and interface applications.

The X9119 product line delivers digitally controlled potentiometers optimized for embedded calibration, analog tuning, and programmable biasing in space-constrained, low-power systems - targeting industrial, medical, and communications equipment where mechanical potentiometer replacement is essential.

FAQ

What is the supply voltage range supported by the X9119TV14Z?

The X9119TV14Z operates from 2.7V to 5.5V, as confirmed in the Ordering Information table and Absolute Maximum Ratings section of the FN8162 datasheet. This range supports direct integration into both 3.3V and 5V systems without level-shifting, and the device maintains full specification compliance-including 1024-tap resolution and <3µA standby current-across the entire range. The "-2.7" suffix in X9119TV14Z-2.7 explicitly denotes this extended low-voltage capability.

How does the power-on recall function work in the X9119TV14Z?

On power-up, the X9119TV14Z automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR), establishing the initial wiper position without host intervention. This behavior is guaranteed per the datasheet's "Power-on recall" feature and functional diagram. DR0 must be pre-programmed with the desired startup value; if unchanged from default, the wiper initializes to position 0 (RW = RL). The X9119TV14Z performs this load within 1ms after VCC stabilizes.

Can the X9119TV14Z be used as a 2-terminal variable resistor?

Yes, the X9119TV14Z can be configured as a 2-terminal variable resistor by connecting either RH or RL to the same node as RW (e.g., short RH to RW for a rheostat between RW/RL and VSS). The datasheet explicitly states this capability under "Features" and illustrates it in Figure 14 ("TWO-TERMINAL VARIABLE RESISTOR"). Wiper resistance remains ≤110Ω (max at 5V), ensuring minimal impact on current-sensing or biasing paths.

What is the purpose of the WP pin on the X9119TV14Z?

The WP (Write Protect) pin on the X9119TV14Z disables nonvolatile writes to the four data registers (DR0–DR3) when held LOW. This prevents accidental overwriting of calibrated values during normal system operation or firmware updates. The pin has no effect on volatile WCR writes or reads. As specified in the "Bus Interface Pins" section, WP is an active-low hardware lock-critical for field-reprogrammable systems where DR0 stores factory-trimmed defaults.

How many devices can share the same I²C bus with the X9119TV14Z?

Up to eight X9119TV14Z devices can coexist on a single 2-wire (I²C) bus, enabled by the three address pins A0, A1, and A2. These pins set the least significant 3 bits of the 7-bit slave address, yielding 2³ = 8 unique addresses (000b to 111b). Each device must have a distinct A0–A2 combination; floating or undefined states are not permitted. The datasheet confirms this in the "DEVICE ADDRESS (A2–A0)" description and Figure 2.