Renesas X9408WV24

Overview

X9408WV24 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 2-wire I²C-compatible interface, 10kΩ end-to-end resistance per channel, 64-tap resolution, and nonvolatile wiper position storage. It operates from 2.7V to 5.5V VCC and ±2.7V to ±5.5V analog supplies, enabling precision analog trimming in mixed-signal instrumentation and programmable gain control circuits.

For engineers reviewing the X9408WV24 datasheet, X9408WV24 pinout, X9408WV24 application, or X9408WV24 equivalent, this device delivers deterministic wiper positioning, hardware write protection, and four independent nonvolatile data registers-key for calibration retention and multi-setting configuration in embedded sensor interfaces and industrial DAC biasing.

Technical Context

The X9408WV24 implements four independent resistor arrays, each with 63 series-connected segments and CMOS-switched wiper taps controlled by a 6-bit volatile Wiper Counter Register (WCR). Each array supports three-terminal potentiometer or two-terminal variable resistor operation with VH/RH, VL/RL, and VW/RW terminals.

Communication occurs via a 2-wire bus (SCL/SDA) using a fixed 0101xxxx slave address format, where A0–A3 set the LSBs. The device supports global and per-pot register transfers, increment/decrement wiper control, and hardware write protection via the WP pin-enabling robust field calibration without unintended nonvolatile writes.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm width), Pb-free (RoHS compliant), rated for 0°C to +70°C operation.

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/P, the X9408WV24 uniquely supports true bipolar analog operation (±5.5V), includes hardware write protection, and offers four independent nonvolatile data registers per channel-making it optimal for precision calibration in industrial and instrumentation systems requiring long-term parameter stability.

Availability

X9408WV24 is available at Aetrix Electronics and suitable for programmable gain amplifiers, industrial sensor calibration, audio balance control, and power supply trim networks requiring stable component supply and guaranteed RoHS-compliant sourcing.

Supply support for X9408WV24 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, aerospace, and communications markets.

The X9408 family was designed to replace mechanical potentiometers in high-reliability, recalibration-critical applications-delivering nonvolatile storage, low wiper resistance, and bipolar analog capability in a single monolithic CMOS IC.

FAQ

What is the operating voltage range for the X9408WV24 analog section?

The X9408WV24 analog section operates with V+ from +2.7V to +5.5V and V− from −2.7V to −5.5V, enabling true bipolar signal handling. This allows the device to function in ±5V op-amp circuits and other dual-rail analog systems without external level-shifting. The digital interface (VCC/VSS) remains independent at 2.7V–5.5V.

How does the X9408WV24 retain wiper position after power cycling?

The X9408WV24 automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) at power-up. Since DR0 is nonvolatile and retains its value for 100 years, the last calibrated wiper position is restored without firmware intervention-ensuring consistent analog behavior across power cycles.

Can the X9408WV24 be used as a two-terminal variable resistor?

Yes, the X9408WV24 supports two-terminal variable resistor mode by connecting either VH/RH or VL/RL to the wiper (VW/RW) terminal. In this configuration, the device functions as a digitally adjustable rheostat with 64 discrete resistance values between 0Ω and 10kΩ, maintaining the same nonvolatile storage and I²C control features.

What is the purpose of the WP pin on the X9408WV24?

The WP (Write Protect) pin on the X9408WV24 is a hardware-level safeguard that disables all nonvolatile writes to the Data Registers when held LOW. This prevents accidental overwriting of factory or field calibration data during system operation or firmware updates-critical for maintaining long-term accuracy in certified instrumentation.

Does the X9408WV24 support I²C standard-mode or fast-mode timing?

The X9408WV24 supports I²C fast-mode operation up to 400kHz clock frequency, with minimum tHIGH = 600ns and tLOW = 1300ns. Its SDA/SCL timing complies fully with JEDEC Standard JESD84-A, allowing seamless integration into microcontroller-based systems using standard I²C peripheral drivers without custom timing adjustments.