Renesas X9400WS24I-2.7

Overview

X9400WS24I-2.7 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 64-tap resolution per channel, SPI serial interface, 10 kΩ end-to-end resistance, ±20% tolerance, and 2.7V to 5.5V system supply operation. It integrates four independent nonvolatile potentiometers for precision analog signal conditioning in programmable gain amplifiers, sensor calibration circuits, and DC bias adjustment loops.

For engineers reviewing the X9400WS24I-2.7 datasheet, X9400WS24I-2.7 pinout, X9400WS24I-2.7 application, or X9400WS24I-2.7 equivalent, this device supports wiper position recall on power-up, hardware write protection, and dual-rail analog operation from –5.5V to +5.5V - critical for bipolar signal path design and embedded recalibration systems.

Technical Context

The X9400WS24I-2.7 implements four independent 63-segment resistor arrays with CMOS switch-controlled wipers, each driven by a volatile 6-bit Wiper Counter Register (WCR) and backed by four nonvolatile 6-bit Data Registers (DR0–DR3). Each potentiometer supports direct SPI write/read of wiper position and register transfer operations with up to 10 ms internal nonvolatile write time.

It operates with SPI clock frequencies up to 2 MHz, requires CS low to enable active mode, and uses HOLD to pause ongoing serial sequences without reset. The WP pin disables nonvolatile writes when pulled low, while A0/A1 configure one of four slave addresses on a shared bus - enabling multi-device daisy-chaining in compact control systems.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300 mil), RoHS-compliant Pb-free plus anneal finish, M24.3 package 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/P, the X9400WS24I-2.7 uniquely delivers bipolar analog operation, nonvolatile wiper recall, and SPI compatibility in a single 24-pin SOIC - making it optimal for self-contained, recalibratable analog subsystems requiring no external memory or level shifters.

Availability

X9400WS24I-2.7 is available at Aetrix Electronics and suitable for programmable gain amplifiers, sensor calibration modules, voltage regulator feedback networks, and comparator hysteresis circuits requiring stable component supply and long-term calibration integrity.

Supply support for X9400WS24I-2.7 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 expertise in high-reliability industrial and automotive-grade components.

The X9400 product line was designed for embedded analog recalibration tasks - delivering nonvolatile, multi-channel digital potentiometer functionality with robust SPI control and true bipolar signal handling.

FAQ

What is the analog voltage range supported by the X9400WS24I-2.7?

The X9400WS24I-2.7 supports analog supplies V+ and V− ranging from –5.5 V to +5.5 V, enabling true bipolar operation across all four potentiometer channels. This allows direct interfacing with ±5 V signal chains without external level-shifting circuitry, and is confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions sections of the FN8189 datasheet.

Does the X9400WS24I-2.7 retain wiper settings after power cycling?

Yes, the X9400WS24I-2.7 automatically loads the contents of Data Register 0 (DR0) into each wiper counter register (WCR) on power-up, ensuring repeatable startup behavior. This power-on recall function is nonvolatile and retains settings for up to 100 years, as specified in the Features and Power-Up Requirements sections of the datasheet.

Can the X9400WS24I-2.7 be used with a 3.3 V microcontroller SPI interface?

Yes, the X9400WS24I-2.7 operates with VCC from 2.7 V to 5.5 V and meets SPI timing requirements at up to 2 MHz clock frequency. Its VIH and VIL thresholds (VCC × 0.7 and VCC × 0.1) ensure reliable logic-level compatibility with standard 3.3 V MCUs without level translation.

How many wiper positions does each potentiometer in the X9400WS24I-2.7 support?

Each of the four potentiometers in the X9400WS24I-2.7 provides 64 discrete wiper positions (0–63), implemented via a 63-resistor segment array with decoded 6-bit Wiper Counter Register control. This 64-tap resolution is explicitly stated in the Features and Array Description sections of the FN8189 datasheet.

Is hardware write protection available on the X9400WS24I-2.7?

Yes, the X9400WS24I-2.7 includes a dedicated WP (Write Protect) pin that, when held LOW, prevents all nonvolatile writes to its Data Registers. This feature safeguards calibration data during firmware updates or noisy operating conditions and is documented in the PIN DESCRIPTIONS and FEATURES sections of the datasheet.