Renesas X9400WV24I-2.7

Overview

X9400WV24I-2.7 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 2.7V to 5.5V system supply range. It integrates four independent resistor arrays with nonvolatile data registers (DR0–DR3), wiper counter registers (WCR), and hardware write protection (WP) for precision analog control in programmable gain stages and offset calibration circuits.

For engineers reviewing the X9400WV24I-2.7 datasheet, X9400WV24I-2.7 pinout, X9400WV24I-2.7 application, or X9400WV24I-2.7 equivalent, key selection criteria include its 24-pin TSSOP package, -40°C to +85°C industrial temperature rating, dual analog supply range (±2.7V to ±5.5V), <1 µA standby current, and support for SPI-based wiper position transfer between volatile and nonvolatile registers.

Technical Context

The X9400WV24I-2.7 implements four independent 63-segment resistor arrays, each controlled by a 6-bit wiper counter register decoded to select one of 64 tap points. Wiper position is updated via SPI instructions including Write/Read WCR, Write/Read Data Register, and Increment/Decrement mode with sub-millisecond response (tWRID = 450 ns).

Each potentiometer features four 6-bit nonvolatile data registers with 100-year data retention and 100,000 write cycles per bit. Power-on recall loads DR0 into the associated WCR. Analog supplies V+ and V− operate from -5.5V to +5.5V, enabling bipolar signal conditioning while maintaining 40 Ω typical wiper resistance at 5V.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm width), RoHS-compliant, Pb-free plus anneal finish. Pin pitch: 0.65 mm. Thermal pad not present.

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-2.7 uniquely supports true bipolar analog operation via dedicated V+/V− pins, guarantees power-on wiper position via DR0 recall, and delivers lower wiper resistance (40 Ω) for reduced gain error in precision divider configurations.

Availability

X9400WV24I-2.7 is available at Aetrix Electronics and suitable for programmable gain amplifiers, offset calibration circuits, voltage regulator feedback networks, and comparator hysteresis control requiring stable component supply across industrial temperature ranges.

Supply support for X9400WV24I-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 provider, now part of Renesas Electronics, with expertise in high-reliability industrial and infrastructure solutions.

The X9400 product line was designed for digitally reconfigurable analog signal conditioning in space-constrained, low-power industrial systems-emphasizing nonvolatile storage, SPI simplicity, and bipolar voltage handling.

FAQ

What is the analog voltage range supported by the X9400WV24I-2.7?

The X9400WV24I-2.7 supports analog supplies V+ = +2.7V to +5.5V and V− = −5.5V to −2.7V, enabling true bipolar operation across ±2.7V to ±5.5V. This allows direct integration into op-amp circuits handling AC signals or dual-rail sensor outputs without external level-shifting components. The X9400WV24I-2.7 maintains specified performance-including wiper resistance and linearity-within this full range.

Does the X9400WV24I-2.7 retain wiper settings after power cycling?

Yes. The X9400WV24I-2.7 automatically loads the contents of Data Register 0 (DR0) into each potentiometer's Wiper Counter Register (WCR) on power-up. DR0 is nonvolatile with 100-year data retention and 100,000 write cycles, ensuring the X9400WV24I-2.7 resumes its last-saved analog configuration without host initialization.

Can the X9400WV24I-2.7 be used with a 3.3V microcontroller SPI interface?

Yes. The X9400WV24I-2.7 accepts VCC from 2.7V to 5.5V and supports standard SPI signaling: VIH = 0.7×VCC, VIL = 0.1×VCC. At 3.3V VCC, logic-high input threshold is 2.31V-fully compatible with 3.3V MCU GPIO. SO output is push-pull and drives to rail, eliminating need for pull-ups in most configurations.

How does hardware write protection (WP) function on the X9400WV24I-2.7?

When the WP pin is driven LOW, the X9400WV24I-2.7 blocks all nonvolatile writes to its four Data Registers (DR0–DR3). Volatile operations-including WCR updates and reads-remain fully functional. This prevents accidental corruption of calibrated settings during normal operation or firmware updates, while allowing runtime wiper adjustment.

What is the maximum SPI clock frequency supported by the X9400WV24I-2.7?

The X9400WV24I-2.7 supports SPI clock frequencies up to 2 MHz, with minimum cycle time of 500 ns, tWH/tWL ≥ 200 ns, and setup/hold times of 50 ns. This allows full register reads/writes in under 20 µs and enables rapid reconfiguration in real-time control loops without compromising timing margins.