Renesas X9400WV24

Overview

X9400WV24 from Intersil is a quad digitally controlled potentiometer (XDCP™) integrating four independent 64-tap resistor arrays with SPI interface, nonvolatile data registers, and power-on wiper recall. It operates from 2.7V to 5.5V VCC, supports ±5V analog rails (V+/V−), and delivers 40Ω typical wiper resistance at 5V. Used for precision analog trimming in programmable gain stages and offset calibration circuits.

For engineers reviewing the X9400WV24 datasheet, X9400WV24 pinout, X9400WV24 application, or X9400WV24 equivalent, this page provides verified specifications, TSSOP-24 package mapping, SPI timing constraints, wiper position persistence behavior, and validated alternative options for industrial-grade voltage-controlled resistor replacement.

Technical Context

The X9400WV24 implements four independent 63-segment resistor arrays, each controlled by a volatile 6-bit Wiper Counter Register (WCR) decoded to select one of 64 tap points. Each array features VH/RH, VL/RL, and VW/RW terminals mirroring mechanical potentiometer connections.

It uses standard SPI protocol with CS, SCK, SI, and SO pins, supports device addressing via A0/A1 (up to 4 devices on bus), and includes hardware write protection (WP) and serial hold (HOLD) for robust bus arbitration. Nonvolatile storage uses EEPROM-like cells with 100,000 endurance cycles and 100-year data retention.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/SL, the X9400WV24 uniquely supports true bipolar analog operation via dedicated V+/V− pins, offers lower wiper resistance (40Ω), and retains four independent channels - making it optimal for precision, multi-rail industrial signal conditioning where rail flexibility and low loading are critical.

Availability

X9400WV24 is available at Aetrix Electronics and suitable for programmable gain amplifiers, sensor offset calibration circuits, voltage regulator feedback networks, and comparator hysteresis control requiring stable component supply and long-term calibration retention.

Supply support for X9400WV24 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 is a leader in precision analog and power management ICs, delivering high-reliability solutions for industrial, infrastructure, and high-end consumer markets.

The X9400WV24 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in automated calibration, programmable analog signal paths, and embedded systems requiring nonvolatile parameter storage.

FAQ

What is the operating voltage range for the analog section of the X9400WV24?

The X9400WV24 supports independent analog supplies: V+ ranges from −5.5V to +5.5V and V− ranges from −5.5V to −2.7V. This enables true bipolar operation across the full resistor array, allowing the X9400WV24 to condition AC signals or interface with dual-supply op-amps without level-shifting circuitry.

Does the X9400WV24 retain wiper positions after power cycling?

Yes. The X9400WV24 automatically loads the contents of Data Register 0 (DR0) into each Wiper Counter Register (WCR) on power-up. Since DR0 is nonvolatile and retains data for 100 years, the X9400WV24 ensures repeatable startup wiper positions without host reinitialization.

How many independent potentiometers does the X9400WV24 contain, and what is their resolution?

The X9400WV24 integrates four independent digitally controlled potentiometers. Each has 64 wiper positions (6-bit resolution), corresponding to 63 equal resistive segments per array. This provides 1.56% step resolution, sufficient for precision gain and offset adjustments in industrial instrumentation.

Can the X9400WV24 be used in a two-terminal variable resistor configuration?

Yes. Each potentiometer in the X9400WV24 can operate as a two-terminal variable resistor by connecting either VH/RH or VL/RL to the wiper (VW/RW) terminal. This configuration is commonly used for programmable current limiting, LED brightness control, or bias current setting in amplifier stages.

What is the maximum SPI clock frequency supported by the X9400WV24?

The X9400WV24 supports SPI clock frequencies up to 2MHz. At this rate, instruction execution (e.g., writing to a Wiper Counter Register) completes within microseconds, enabling rapid reconfiguration during system calibration or dynamic range switching in real-time applications.