Renesas X9400WV24I

Overview

X9400WV24I 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 in precision voltage divider, offset adjustment, and programmable gain control circuits for industrial instrumentation and embedded sensor interfaces.

For engineers reviewing the X9400WV24I datasheet, X9400WV24I pinout, X9400WV24I application, or X9400WV24I equivalent, key selection criteria include its 24-pin TSSOP package, -40°C to +85°C industrial temperature range, 10kΩ/2.5kΩ end-to-end resistance options, SPI-based wiper positioning with 100,000-cycle endurance, and hardware write protection via WP pin.

Technical Context

The X9400WV24I 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). Wiper position is updated via SPI commands including direct write, register transfer, or real-time increment/decrement.

Its SPI interface complies with standard mode-0 timing (CPOL=0, CPHA=0), supports up to 2 MHz clock frequency, and includes chip select (CS), hold (HOLD), and hardware write protect (WP) for robust multi-device bus operation. Analog section isolation enables operation with V+ = +5V and V− = −5V while digital logic runs from 2.7V–5.5V VCC.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm 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 X9400WV24I uniquely supports ±5V analog operation, integrates nonvolatile storage with power-on recall, and delivers 64-tap precision in a 24-pin TSSOP-making it optimal for industrial sensor signal chains requiring robust, self-initializing analog trimming.

Availability

X9400WV24I is available at Aetrix Electronics and suitable for industrial instrumentation, embedded sensor interfaces, and programmable power management systems requiring stable component supply and long-term calibration integrity.

Supply support for X9400WV24I 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 digitally reconfigurable analog signal conditioning-targeting applications demanding nonvolatile trim, bipolar rail support, and SPI-based remote calibration in harsh environments.

FAQ

What is the operating temperature range for the X9400WV24I?

The X9400WV24I is rated for industrial operation from −40°C to +85°C. This range is confirmed in the Ordering Information table (page 2 of FN8189 Rev 4.00) for part numbers marked "X9400WV24IZ*", which explicitly includes X9400WV24I. The device meets full electrical specifications across this range, including wiper resistance, nonvolatile write timing, and SPI interface timing.

Does the X9400WV24I support bipolar analog signals?

Yes, the X9400WV24I supports true bipolar analog operation with dedicated V+ and V− pins rated from −5.5V to +5.5V (absolute max) and −5V to +5V (recommended). This allows the resistor arrays to handle signals spanning the full range, such as ±2.5V sensor outputs or op-amp feedback networks-unlike single-supply digital pots that clamp negative excursions.

How does power-on wiper recall work in the X9400WV24I?

On power-up, the X9400WV24I automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR). This behavior is guaranteed provided VCC ramps monotonically and all power supplies stabilize before issuing commands. DR0 must be pre-programmed during initial calibration or field setup to ensure correct startup state.

Can the X9400WV24I be used with a 3.3V microcontroller SPI interface?

Yes, the X9400WV24I supports VCC from 2.7V to 5.5V, making it fully compatible with 3.3V logic levels. Its VIH and VIL thresholds (VCC × 0.7 and VCC × 0.1) ensure reliable recognition of 3.3V MCU outputs. The SO pin is push-pull, eliminating need for external pull-ups, and the 2 MHz max SPI clock accommodates standard 3.3V MCU peripherals.

What is the purpose of the HOLD pin on the X9400WV24I?

The HOLD pin allows pausing an active SPI transaction without resetting the command sequence. When brought LOW while SCK is LOW, it freezes communication; bringing it HIGH (again with SCK LOW) resumes exactly where it left off. This enables time-critical host processors to service interrupts or manage bus arbitration without losing context-distinct from CS deassertion, which aborts the operation.