Renesas X9119TV14

Overview

X9119TV14 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 volatile wiper counter register with four nonvolatile data registers. It functions as a programmable 3-terminal potentiometer or 2-terminal variable resistor for precision analog trimming in voltage regulators, audio volume control, and sensor signal conditioning.

For engineers reviewing the X9119TV14 datasheet, X9119TV14 pinout, X9119TV14 application, or X9119TV14 equivalent, this device supports I²C-compatible 2-wire communication, offers <3µA standby current, enables power-on recall from DR0, and provides 100-year data retention across its four 10-bit nonvolatile registers - critical for embedded systems requiring long-term calibration stability without battery backup.

Technical Context

The X9119TV14 implements a monolithic CMOS resistor array of 1023 series-connected elements with CMOS-switched wiper access at 1024 tap points, decoded directly from the 10-bit Wiper Counter Register (WCR). Its 2-wire interface uses open-drain SDA with pull-up requirement and supports standard I²C timing up to 400kHz.

Four nonvolatile data registers (DR0–DR3) store wiper positions or system parameters; DR0 is automatically loaded into the volatile WCR at power-up. Hardware write protection (WP pin) disables nonvolatile writes when asserted low, and device addressing uses A0–A2 pins to support up to eight devices on one bus.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4mm width), RoHS-compliant, M14.173 footprint. Pin 1, 3, and 10 are no-connect (NC) and must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-100 and MCP45HV51-103E/MS, the X9119TV14 uniquely combines 10-bit resolution, four nonvolatile registers, hardware write protection, and true I²C compatibility in a 14-lead TSSOP - making it optimal for precision, multi-parameter, and safety-aware trimming in 3.3V/5V embedded systems.

Availability

X9119TV14 is available at Aetrix Electronics and suitable for voltage regulator adjustment, audio volume control, sensor offset trimming, and active filter tuning requiring stable component supply and long-term calibration integrity.

Supply support for X9119TV14 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, communications, and computing applications.

The X9119 product line delivers digitally controlled potentiometers optimized for replacing mechanical trimmers in calibration-critical systems - emphasizing nonvolatile storage, low power, and robust 2-wire interoperability.

FAQ

What is the function of the WP pin on the X9119TV14?

The WP (Write Protect) pin on the X9119TV14 is an active-low hardware control that disables all nonvolatile writes to the four data registers (DR0–DR3) when held low. This prevents accidental overwriting of stored calibration values during normal operation or firmware updates. The X9119TV14 continues to support volatile wiper adjustments and reads regardless of WP state, ensuring safe runtime tuning while protecting persistent settings.

Does the X9119TV14 require external pull-up resistors on its I²C lines?

Yes, the X9119TV14 requires external pull-up resistors on both SDA and SCL pins because its SDA output is open-drain and SCL is a passive input. Typical values range from 2.2kΩ to 10kΩ depending on bus capacitance and speed; the device supports standard-mode I²C up to 400kHz. Pull-ups must connect to the same VCC rail used by the X9119TV14 to ensure valid logic levels and proper ACK signaling.

How does power-on recall work in the X9119TV14?

At power-up, the X9119TV14 automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR), positioning the wiper to the stored value without host intervention. This behavior is hardwired and occurs within 1ms after VCC stabilizes. The X9119TV14 relies on DR0 being pre-programmed with the desired default setting - making DR0 the sole source for power-on wiper position in the X9119TV14.

Can the X9119TV14 be used as a 2-terminal variable resistor?

Yes, the X9119TV14 can operate as a 2-terminal variable resistor by connecting either RH or RL to the wiper (RW) pin and using the remaining two terminals as the variable resistance element. In this configuration, the effective resistance ranges from near 0Ω (wiper at terminal) to 100kΩ (wiper at opposite end), with wiper resistance contributing minimally (<40Ω typ.). This mode is commonly used in current-setting or gain-control applications where a three-terminal divider is unnecessary.

What is the maximum clock frequency supported by the X9119TV14's 2-wire interface?

The X9119TV14 supports a maximum SCL clock frequency of 400kHz, compliant with standard-mode I²C specifications. Its AC timing parameters - including tCYC (2500ns), tHIGH (600ns), and tLOW (1300ns) - are fully characterized for reliable operation at this rate. Exceeding 400kHz may result in setup/hold violations or failed ACK responses, especially under capacitive bus loading or marginal VCC conditions.