Renesas X9418WV24-2.7

Overview

X9418WV24-2.7 from Intersil is a dual digitally controlled potentiometer (XDCP™) with 2-wire I²C-compatible interface, 64-tap resolution per pot, ±2.7V to ±5.5V analog supply range (V+/V−), and 10 kΩ end-to-end resistance. It integrates two independent resistor arrays, volatile wiper counter registers, and four nonvolatile data registers per channel for battery-powered parameter tuning in precision analog signal paths.

For engineers reviewing the X9418WV24-2.7 datasheet, X9418WV24-2.7 pinout, X9418WV24-2.7 application, or X9418WV24-2.7 equivalent, key selection criteria include dual-pot integration, 2.7V–5.5V VCC operation, hardware write-protect (WP) support, TSSOP-24 package compatibility, and nonvolatile storage of up to four wiper positions per channel.

Technical Context

The X9418WV24-2.7 implements two independent 63-segment resistor arrays with CMOS-switched wipers controlled by 6-bit volatile Wiper Counter Registers (WCR). Each potentiometer supports direct read/write of wiper position and transfer between four nonvolatile Data Registers (DR0–DR3) and its WCR via register-oriented I²C commands.

Its 2-wire serial interface complies with standard I²C timing (fSCL ≤ 400 kHz), includes slave address inputs A0–A3 (allowing up to 16 devices on one bus), and features hardware write protection (WP pin) to prevent unintended EEPROM writes. Power-up automatically loads DR0 into each WCR.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), RoHS-compliant, Pb-free plus anneal option available.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled potentiometer applications.

Compared with AD5242BRUZ10 and MCP42010-I/P, the X9418WV24-2.7 uniquely supports true bipolar analog operation (±2.7 V to ±5.5 V) with integrated dual pots and hardware write protection-making it optimal for compact, battery-powered, precision analog tuning where signal swing exceeds unipolar rails.

Availability

X9418WV24-2.7 is available at Aetrix Electronics and suitable for audio signal conditioning, programmable voltage references, DC-DC feedback tuning, and sensor signal conditioning requiring stable component supply and long-term calibration retention.

Supply support for X9418WV24-2.7 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 (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X9418 family delivers digitally controlled potentiometers optimized for low-noise, low-power, and high-reliability analog trimming in portable, industrial, and automotive systems-emphasizing nonvolatile storage, bipolar operation, and I²C simplicity.

FAQ

What is the absolute maximum analog supply voltage range for X9418WV24-2.7?

The X9418WV24-2.7 supports V+ up to +5.5 V and V− down to −5.5 V referenced to VSS, with a maximum differential (V+ − V−) of 12 V. Operation outside these limits risks permanent damage. The device is rated for ±2.7 V to ±5.5 V recommended analog supply range, and X9418WV24-2.7 maintains full functionality across this window while ensuring 100-year data retention and 100,000-cycle endurance.

Does X9418WV24-2.7 support true I²C bus arbitration and multi-master operation?

No, X9418WV24-2.7 operates strictly as an I²C slave device and does not implement bus arbitration logic. It responds only to its configured 8-bit slave address (0101xxxx) and cannot act as a master or detect collisions. The X9418WV24-2.7 relies on external master control for all transactions, including ACK polling during nonvolatile writes-making it suitable for single-master systems but not multi-master buses.

How does power-up sequencing affect wiper register initialization in X9418WV24-2.7?

X9418WV24-2.7 requires strict power-up order: VCC first, then V+ and V−, followed by application of signals to VH/VL/VW pins. If V+ or V− is applied before VCC, or if VCC drops below 0.1 V for less than 1 second during cycling, DR0 may fail to load into the WCR. Correct sequencing ensures X9418WV24-2.7 recalls the saved wiper position on every power cycle-critical for zero-touch calibration in field-deployed equipment.

Can X9418WV24-2.7 be used as a two-terminal variable resistor (rheostat)?

Yes, X9418WV24-2.7 supports two-terminal rheostat configuration by connecting either VH/RH or VL/RL to VW/RW and using the remaining terminal with the wiper. Each potentiometer's 10 kΩ array allows up to ±3 mA wiper current (per datasheet limit), making X9418WV24-2.7 suitable for LED current control, bias current adjustment, or programmable load termination-provided voltage across the selected terminals stays within V− to V+.

What is the wiper response time after issuing a write command to the Wiper Counter Register in X9418WV24-2.7?

After issuing a Write Wiper Counter Register command, the X9418WV24-2.7 updates the physical wiper position within 10 µs (tWRL), as specified in the datasheet. This delay is deterministic and independent of VCC or temperature. For real-time tuning, the Increment/Decrement command provides sub-microsecond wiper movement per SCL edge-enabling smooth, jitter-free adjustment in X9418WV24-2.7-based control loops.