Renesas X9118TV14

Overview

X9118TV14 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 1024-tap, 100kΩ end-to-end resistive array with 2-wire serial interface, ±5V analog supply range (V+/V−), and 2.7V–5.5V system VCC operation. It functions as a programmable three-terminal potentiometer or two-terminal variable resistor in precision analog signal conditioning, DC biasing, and gain control circuits.

For engineers reviewing the X9118TV14 datasheet, X9118TV14 pinout, X9118TV14 application, or X9118TV14 equivalent, key selection criteria include its non-volatile data register storage (DR0–DR3), power-on recall of DR0 to wiper counter, <15µA standby current, 40Ω typical wiper resistance at 5V, and 14-lead TSSOP package compatibility with industrial temperature range (−40°C to +85°C).

Technical Context

The X9118TV14 integrates a monolithic CMOS resistor ladder of 1023 segments with CMOS transmission-gate switches controlled by a 10-bit volatile Wiper Counter Register (WCR). Its 2-wire bus interface supports read/write/transfer operations to both WCR and four non-volatile data registers (DR0–DR3), enabling persistent storage of up to four distinct wiper positions.

Operation requires independent analog supplies V+ (−5V to +5V) and V− (−5V to +5V) to bias the wiper switches and substrate, while digital VCC (2.7V–5.5V) powers the interface logic. Power-up automatically loads DR0 into WCR, and hardware write protection (WP pin) disables nonvolatile writes when asserted low.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (M14.173), RoHS-compliant, moisture sensitivity level (MSL) compliant with IPC/JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ100 and MCP45HV51-103, the X9118TV14 uniquely combines 10-bit resolution, true bipolar analog operation (±5V), automatic DR0 power-on recall, and hardware write protection-making it optimal for industrial sensor conditioning and precision analog calibration where reliability and signal integrity are paramount.

Availability

X9118TV14 is available at Aetrix Electronics and suitable for industrial sensor calibration, precision op-amp biasing, and LED backlight regulation requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9118TV14 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 focused on power management, precision analog, and interface solutions for industrial, automotive, and communications markets.

The X9118TV14 belongs to Intersil's XDCP™ digitally controlled potentiometer family, engineered for replacing mechanical trimpots in applications demanding nonvolatile calibration storage, digital programmability, and robust bipolar analog signal handling.

FAQ

What is the maximum analog voltage range supported by the X9118TV14?

The X9118TV14 supports V+ from −5.5V to +5.5V and V− from −5.5V to +2.7V, enabling true bipolar operation with up to ±5V signal swing across RH and RL terminals. This allows direct integration into op-amp circuits, sensor bridges, and RF bias networks without external level-shifting components. The X9118TV14 maintains specified performance across this full analog range when VCC is within 2.7V–5.5V.

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

On power-up, the X9118TV14 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 provided VCC, V+, and V− reach stable values within 1ms of each other. The X9118TV14 retains DR0 contents for 100 years, ensuring consistent startup states across decades of operation.

Can the X9118TV14 be used with a 3.3V microcontroller I²C interface?

Yes-the X9118TV14's 2-wire interface is fully compatible with 3.3V I²C masters. Its SDA and SCL pins accept VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC, and VCC may be set to 3.3V. The open-drain SDA requires an external pull-up resistor (2–2.5kΩ typical), and the device supports clock frequencies up to 400kHz. The X9118TV14 maintains full functionality-including nonvolatile register access and wiper control-at 3.3V VCC.

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

The WP (Write Protect) pin on the X9118TV14 is a hardware-enabled, low-active input that prevents all nonvolatile writes to the four data registers (DR0–DR3) when pulled low. This safeguards calibration data from accidental overwrite during normal operation or firmware updates. The X9118TV14 continues to support volatile wiper adjustments (via WCR writes) and reads regardless of WP state. The X9118TV14 datasheet specifies no effect on DR register reads or WCR operations when WP is asserted.

Does the X9118TV14 require external passive components for basic operation?

The X9118TV14 requires only two external components for functional 2-wire operation: pull-up resistors on SDA and SCL lines (2–2.5kΩ typical for 400kHz). No external capacitors, resistors, or voltage translators are needed for analog signal paths, as the device internally manages wiper switching and supports direct connection of RH/RL/RW to bipolar analog circuits. The X9118TV14 operates reliably with these minimal external parts across its full −40°C to +85°C temperature range.