Renesas X9418WV24I

Overview

X9418WV24I from Intersil is a dual digitally controlled potentiometer (XDCP™) with 2-wire serial interface, 64-tap resolution per pot, ±2.7V to ±5.5V analog supply range, and 10kΩ end-to-end resistance. It integrates two independent resistor arrays, each with volatile wiper counter registers and four nonvolatile data registers, enabling precise digital adjustment in battery-powered instrumentation and precision analog signal conditioning.

For engineers reviewing the X9418WV24I datasheet, X9418WV24I pinout, X9418WV24I application, or X9418WV24I equivalent, key selection criteria include its industrial temperature range (–40°C to +85°C), TSSOP-24 package, hardware write-protect (WP) pin, and support for global register transfers between both potentiometers.

Technical Context

The X9418WV24I implements two independent 63-segment resistor arrays with CMOS-switched wipers controlled by 6-bit volatile Wiper Counter Registers (WCR). Each potentiometer supports direct read/write of wiper position and stores up to four user-defined settings in nonvolatile Data Registers (DR0–DR3), with DR0 automatically loaded at power-up.

It uses a standard 2-wire (I²C-compatible) interface with slave address configurable via A0–A3 pins, supports increment/decrement wiper control via SCL/SDA timing, and features hardware write protection (WP) to prevent unintended nonvolatile writes during operation.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm width), RoHS-compliant, Pb-free plus anneal finish (MDP0044).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42010-I/P, the X9418WV24I uniquely combines dual-pot architecture, bipolar analog operation, hardware write protection, and industrial temperature rating-making it optimal for robust, matched-channel analog tuning where reliability and supply flexibility are essential.

Availability

X9418WV24I is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, audio level control, and comparator hysteresis tuning requiring stable component supply and long-term lifecycle continuity.

Supply support for X9418WV24I 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 Corporation, now part of Renesas Electronics, designs high-performance analog and mixed-signal ICs for industrial, communications, and computing markets.

The X9418 product line delivers digitally controlled potentiometers optimized for precision analog trimming, calibration, and signal conditioning in harsh environments-emphasizing nonvolatile retention, bipolar operation, and industrial temperature resilience.

FAQ

What is the absolute maximum analog supply voltage for X9418WV24I?

The X9418WV24I supports V+ up to +5.5V and V− down to –5.5V, with an absolute maximum differential of 12V between them. Exceeding ±5.5V on either rail risks permanent damage per the Absolute Maximum Ratings table. Always ensure V+ and V− are applied after VCC and follow recommended power-up sequencing to guarantee correct wiper register recall in X9418WV24I.

Does X9418WV24I support true I²C bus operation?

Yes, X9418WV24I implements a standard 2-wire interface compatible with I²C protocol: SDA is open-drain with required pull-up, SCL is clock input, and it responds to 7-bit slave addresses (0101xxxx). It supports 400kHz clock rate, acknowledges valid addresses and instructions, and observes standard start/stop conditions-enabling seamless integration into existing I²C systems without protocol translation for X9418WV24I.

How does the hardware write protect (WP) pin function in X9418WV24I?

When WP is pulled low, X9418WV24I blocks all nonvolatile writes to its Data Registers (DR0–DR3), preventing accidental overwrites during system operation or noise events. Volatile wiper updates (via Write WCR or Increment/Decrement) remain fully functional. This feature ensures calibration integrity in field-deployed equipment-critical for maintaining certified performance in X9418WV24I-based medical or industrial instruments.

Can X9418WV24I be used as a two-terminal variable resistor?

Yes, X9418WV24I supports two-terminal (rheostat) configuration: connect VH/RH and VL/RL to fixed potentials and use VW/RW as the adjustable terminal. Its 10kΩ end-to-end resistance and 64-tap resolution provide predictable current limiting or bias adjustment. The device's low wiper resistance (≤250Ω) and high linearity (±1% absolute) ensure minimal insertion error-validating its use as a precision rheostat in X9418WV24I designs.

What happens to wiper positions during power cycling of X9418WV24I?

Upon power-up, X9418WV24I automatically loads the contents of Data Register 0 (DR0) into both potentiometers' volatile Wiper Counter Registers (WCR), restoring the last-saved setting. This behavior requires proper power sequencing (VCC first, then V+/V−) and stable supplies. If DR0 was never written, default wiper position is 0x00 (wiper at VL/RL). All DR values persist for >100 years-ensuring reliable startup state recovery in X9418WV24I.