Renesas X9400WV24IZ

Overview

X9400WV24IZ from Intersil is a quad digitally controlled potentiometer (XDCP™) with SPI interface, 64-tap resolution per channel, 10 kΩ end-to-end resistance, ±20% tolerance, and -40°C to +85°C industrial temperature range. It integrates four independent resistor arrays in a single 24-lead TSSOP package and supports analog supply rails from -5 V to +5 V for bipolar signal conditioning in precision instrumentation.

For engineers reviewing the X9400WV24IZ datasheet, X9400WV24IZ pinout, X9400WV24IZ application, or X9400WV24IZ equivalent, this device serves as a nonvolatile, low-noise replacement for mechanical potentiometers in closed-loop gain/offset tuning, programmable filter cutoffs, and multi-channel sensor calibration circuits requiring stable wiper position recall at power-up.

Technical Context

The X9400WV24IZ implements four independent 63-segment resistor arrays with CMOS-switched wipers controlled by volatile Wiper Counter Registers (WCR), each backed by four 6-bit nonvolatile Data Registers (DR0–DR3). Power-on automatically loads DR0 into the corresponding WCR, enabling deterministic startup behavior without host initialization.

Its SPI interface supports full-duplex read/write of wiper positions and data registers, global transfers across all four pots, and real-time increment/decrement via SCK-synchronized SI level detection - all while maintaining <1 µA standby current and 100-year data retention. Hardware write protection (WP) disables nonvolatile writes independently of software control.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), 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 X9400WV24IZ uniquely supports ±5 V analog rails and hardware write protection, making it the only option among the three for robust, field-programmable bipolar signal conditioning with guaranteed power-up state recovery.

Availability

X9400WV24IZ is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and audio signal processing requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9400WV24IZ 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 precision analog and power management semiconductor company, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.

The X9400 family was designed specifically for replacing mechanical potentiometers in systems demanding nonvolatile wiper storage, low noise, and bipolar analog signal handling - targeting test equipment, process control, and medical instrumentation.

FAQ

What is the analog voltage range supported by the X9400WV24IZ?

The X9400WV24IZ supports analog supply rails V+ and V− ranging from -5 V to +5 V referenced to VSS. This enables true bipolar operation of its four potentiometer channels, allowing use in AC-coupled circuits, sensor front-ends with negative excitation, and precision instrumentation where signal swing exceeds ground or VCC. The X9400WV24IZ maintains specified performance across this full range when VCC is within 2.7 V to 5.5 V.

How does the X9400WV24IZ handle power-up wiper position recall?

The X9400WV24IZ automatically loads the contents of Data Register 0 (DR0) into each potentiometer's volatile Wiper Counter Register (WCR) upon power-up, provided VCC, V+, and V− all reach stable operating levels. This ensures deterministic startup behavior without host intervention. The X9400WV24IZ requires VCC to remain below 0.1 V for >1 second before power-up to guarantee correct DR0 recall, and VCC ramp rate must stay between 0.2–50 V/msec.

Can the X9400WV24IZ be used as a two-terminal variable resistor?

Yes, the X9400WV24IZ can be configured as a two-terminal variable resistor by connecting either VHx or VLx to the wiper VWx and using the remaining terminal as the adjustable node. Its 10 kΩ end-to-end resistance and 40 Ω typical wiper resistance at 5 V make it suitable for current-limiting, bias adjustment, and programmable load applications. The X9400WV24IZ retains nonvolatile storage and SPI control regardless of configuration.

What is the function of the HOLD pin on the X9400WV24IZ?

The HOLD pin on the X9400WV24IZ pauses an ongoing SPI transaction without resetting the command sequence. To pause, HOLD must be driven LOW while SCK is LOW; to resume, HOLD is returned HIGH while SCK remains LOW. This feature allows external controllers to temporarily suspend communication - for example, during interrupt servicing - and then continue from the exact point of interruption. If unused, HOLD should be tied HIGH.

Does the X9400WV24IZ support daisy-chaining multiple devices on one SPI bus?

No, the X9400WV24IZ does not support daisy-chaining. It uses standard SPI with individual chip select (CS) lines. However, up to four X9400WV24IZ devices can share the same SCK, SI, and SO lines by assigning unique addresses via A0/A1 pins and using separate CS signals. Each device responds only when its 2-bit address matches the ID byte sent by the host, enabling efficient multi-device control without additional logic.