Renesas X9314WSI

Overview

X9314WSI from Intersil is a solid-state nonvolatile digitally controlled potentiometer (XDCP™) with 32 log-taper taps, 10kΩ end-to-end resistance, and three-wire up/down serial interface; it serves as a precision trim element in analog signal conditioning circuits for audio gain control, sensor offset calibration, and power supply feedback loop adjustment.

For engineers reviewing the X9314WSI datasheet, X9314WSI pinout, X9314WSI application, or X9314WSI equivalent, key selection considerations include wiper position nonvolatile storage on power-up, ±5V terminal voltage tolerance, 40Ω typical wiper resistance, and compatibility with 3V–5.5V supply operation in industrial temperature range.

Technical Context

The X9314WSI implements a 5-bit up/down counter driving a 31-element resistor array with make-before-break electronic switches; wiper position is decoded to select one of 32 tap points, and stored in nonvolatile memory upon CS↑ while INC = HIGH.

It operates with VCC = 3V to 5.5V, supports ±1mA wiper current, maintains 100-year data retention, and exhibits ±600 ppm/°C RTOTAL temperature coefficient across –40°C to +85°C - enabling stable trimming under thermal drift conditions without recalibration.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (M8.15), RoHS-compliant, Pb-free plus anneal finish, body dimensions 4.9mm × 3.9mm × 1.75mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ10 and MCP41010-I/P, the X9314WSI uniquely combines log taper, ±5V analog tolerance, and automatic power-up recall - making it optimal for audio, bipolar sensor, and maintenance-free power supply trimming where interface simplicity and analog robustness are prioritized over tap count or communication protocol flexibility.

Availability

X9314WSI is available at Aetrix Electronics and suitable for audio volume control, sensor offset calibration, and power supply feedback trimming requiring stable component supply, long-term parameter retention, and industrial temperature operation.

Supply support for X9314WSI 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) is a U.S.-based analog and mixed-signal semiconductor company specializing in power management, precision analog, and interface ICs.

The X9314WSI belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in high-reliability, maintenance-free analog tuning applications across industrial, medical, and communications equipment.

FAQ

What is the operating temperature range for the X9314WSI?

The X9314WSI is rated for industrial temperature operation from –40°C to +85°C. This range is confirmed in the Ordering Information table (FN8178 Rev 3.00, Page 2), where X9314WSI corresponds to the "X9314WSIZ" variant with "–40 to +85°C" specified under TEMP RANGE. Its ±600 ppm/°C RTOTAL temperature coefficient ensures predictable resistance drift across this full span, supporting use in uncontrolled environments like factory floors or outdoor enclosures.

Does the X9314WSI require an external clock or MCU firmware to retain its wiper position after power loss?

No, the X9314WSI does not require external clocking or MCU firmware to retain wiper position. It features integrated nonvolatile memory that automatically stores the current wiper setting when CS transitions HIGH while INC is HIGH. Upon subsequent power-up, the device recalls that stored value without any host interaction - a core feature documented in the Principles of Operation section (Page 3) and confirmed by the "100 Year Data Retention" specification.

Can the X9314WSI be used with bipolar analog signals such as ±2.5V or ±5V?

Yes, the X9314WSI supports bipolar analog operation: VH/RH and VL/RL terminals tolerate –5V to +5V relative to VSS, as explicitly stated in the Pin Descriptions (Page 2) and Absolute Maximum Ratings (Page 4). This allows direct connection to op-amp rails, differential sensor outputs, or AC-coupled signals without external clamping or level-shifting circuitry - a key differentiator versus many competing DCPs limited to 0–VCC operation.

What is the wiper resistance of the X9314WSI, and why does it matter in circuit design?

The X9314WSI has a typical wiper resistance of 40Ω, with a maximum of 100Ω (Potentiometer Characteristics table, Page 4). This value directly impacts gain accuracy in op-amp feedback networks and insertion loss in signal paths. For example, in a 10kΩ divider, 40Ω adds only 0.4% error - acceptable for most trimming applications - whereas higher wiper resistance would degrade precision in low-impedance configurations or cause audible zipper noise in audio paths.

How is the X9314WSI programmed - does it use SPI, I²C, or another interface?

The X9314WSI uses a proprietary three-wire up/down serial interface (CS, U/D, INC), not SPI or I²C. As shown in the Block Diagram (Page 1) and Mode Selection table (Page 5), wiper position is advanced or reversed on each falling edge of INC, with direction controlled by the logic level on U/D, and device enabled via active-low CS. This minimal GPIO interface simplifies integration with resource-constrained MCUs and avoids protocol overhead or address conflicts common in multi-device I²C/SPI buses.