Renesas X9418WS24T1

Overview

X9418WS24T1 from Intersil is a dual digitally controlled potentiometer (XDCP™) with 2-wire serial interface, 64-tap resolution per pot, ±2.7V to ±5.5V analog supply range (V+/V−), and 10kΩ end-to-end resistance. It integrates two independent resistor arrays, each with volatile wiper counter registers and four nonvolatile data registers, enabling battery-powered parameter tuning in precision analog signal paths.

For engineers reviewing the X9418WS24T1 datasheet, X9418WS24T1 pinout, X9418WS24T1 application, or X9418WS24T1 equivalent, key selection criteria include dual-potentiometer integration, 2-wire bus compatibility, nonvolatile storage of up to four wiper positions per channel, low standby current (<1µA), and SOIC-24 package suitability for industrial temperature range (−40°C to +85°C).

Technical Context

The X9418WS24T1 implements two 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, with automatic DR0→WCR load at power-up.

It uses a standard I²C-compatible 2-wire interface (SCL/SDA) with slave address formed by fixed device type identifier (0101) and user-configurable A0–A3 pins, supporting up to 16 devices on one bus. Hardware write protection (WP) disables nonvolatile writes when asserted low.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300-mil), RoHS-compliant, rated for −40°C to +85°C operation.

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 X9418WS24T1 uniquely delivers dual-pot functionality with true bipolar analog supply rails and I²C compatibility - making it the only option among the three suitable for precision, battery-efficient, dual-channel analog tuning in industrial signal conditioning.

Availability

X9418WS24T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, audio level control, and comparator hysteresis tuning requiring stable component supply and long-term obsolescence management.

Supply support for X9418WS24T1 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) designs high-performance analog and mixed-signal ICs for industrial, communications, and computing markets.

The X9418 product line delivers digitally controlled potentiometers optimized for precision analog trimming, calibration, and parameter adjustment in harsh environments with extended temperature and reliability requirements.

FAQ

What is the operating temperature range for the X9418WS24T1?

The X9418WS24T1 is specified for industrial operation from −40°C to +85°C. This range is validated across all electrical parameters including wiper resistance, linearity, and nonvolatile write endurance. The SOIC-24 package (M24.3) used in X9418WS24T1 meets thermal cycling and solderability requirements for this temperature grade. Operation outside this range may result in parametric shift or data retention loss.

Does the X9418WS24T1 support true bipolar analog operation?

Yes, the X9418WS24T1 supports true bipolar analog operation via dedicated V+ and V− pins, rated from −5.5V to −2.7V and +2.7V to +5.5V respectively. This allows the resistor arrays to handle signals swinging above and below ground - unlike unipolar digital pots that require level-shifting. The X9418WS24T1 maintains specified linearity and wiper resistance across the full bipolar range.

How many nonvolatile settings can be stored per potentiometer in the X9418WS24T1?

The X9418WS24T1 provides four 6-bit nonvolatile Data Registers (DR0–DR3) per potentiometer, enabling storage of up to four distinct wiper positions per channel. DR0 is automatically loaded into the volatile Wiper Counter Register at power-up. All nonvolatile writes require WP pin deassertion and take 5–10ms to complete, with guaranteed 100-year data retention.

Is the X9418WS24T1 pin-compatible with other members of the X9418 family?

Yes, all X9418 variants - including X9418WS24T1 (SOIC), X9418WP24I-2.7 (PDIP), and X9418WV24I-2.7 (TSSOP) - share identical 24-pin pinouts and electrical behavior. The only differences are package type, marking, and RoHS compliance status. This allows drop-in replacement across packages without layout changes, provided thermal and mechanical constraints are met.

What is the maximum clock frequency supported by the X9418WS24T1's 2-wire interface?

The X9418WS24T1 supports a maximum I²C clock frequency of 400kHz, compliant with Fast-mode I²C specifications. Timing parameters including tHIGH (600ns min), tLOW (1300ns min), and tSU:DAT (100ns min) are fully characterized over the industrial temperature range. Exceeding 400kHz may cause communication failures due to internal timing margins and SDA rise/fall time limitations.