Renesas X9314WST1

Overview

X9314WST1 from Intersil is a solid-state, nonvolatile, digitally controlled potentiometer with 32 log-taper taps, 10kΩ end-to-end resistance, ±5V terminal voltage rating, and three-wire up/down serial interface-used for precision resistance trimming in analog signal conditioning circuits.

For engineers reviewing the X9314WST1 datasheet, X9314WST1 pinout, X9314WST1 application, or X9314WST1 equivalent, key selection criteria include wiper position retention on power-up, 40Ω typical wiper resistance, 5V ±10% supply operation, and compatibility with industrial temperature range (-40°C to +85°C) designs.

Technical Context

The X9314WST1 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 between VH/RH and VL/RL terminals.

Nonvolatile storage is triggered by a HIGH-to-LOW transition on CS while INC is HIGH, retaining wiper position for ≥100 years; recall occurs automatically at power-up, eliminating external initialization firmware.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, Pb-free plus anneal finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ10 and MCP41010-I/P, the X9314WST1 uniquely combines log taper, true nonvolatile storage, and minimal three-wire control-making it optimal for self-contained, low-firmware, audio or calibration-critical analog trimming where power-cycle persistence is mandatory.

Availability

X9314WST1 is available at Aetrix Electronics and suitable for audio volume control, DC bias adjustment, and power supply trim applications requiring stable component supply, industrial temperature support, and guaranteed long-term calibration retention.

Supply support for X9314WST1 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 X9314WST1 belongs to Intersil's XDCP™ (eXternally Controlled Digital Potentiometer) family-engineered for replacement of mechanical potentiometers in trimming, calibration, and user-control functions where reliability, longevity, and digital configurability are essential.

FAQ

What is the operating voltage range for the X9314WST1?

The X9314WST1 operates from 5V ±10%, i.e., 4.5V to 5.5V on VCC. Its analog terminals (VH/RH and VL/RL) tolerate ±5V relative to VSS, supporting bipolar signal handling. This matches standard 5V logic and analog rails without level-shifting-critical for direct integration into legacy industrial and audio systems using the X9314WST1.

Does the X9314WST1 retain its wiper position after power loss?

Yes, the X9314WST1 stores wiper position in nonvolatile memory upon command and retains it for ≥100 years. A rising edge on CS with INC held HIGH triggers storage; at next power-up, the stored value is automatically recalled. This behavior eliminates boot-time reinitialization-making the X9314WST1 ideal for unattended or remote equipment where the X9314WST1 must resume exact prior settings.

How many wiper positions does the X9314WST1 support, and what taper does it use?

The X9314WST1 provides 32 discrete wiper positions with logarithmic (log) taper, optimized for perceptually uniform adjustment in audio gain and display brightness control. Unlike linear-taper DCPs, the X9314WST1's step-wise resistance change follows a log curve-ensuring consistent loudness or luminance increments across its full range.

What interface protocol does the X9314WST1 use, and how many control lines are required?

The X9314WST1 uses a simple three-wire up/down serial interface: CS (chip select), U/D (direction), and INC (increment). No clock or data bus is needed-each negative edge on INC moves the wiper one step in the direction set by U/D. This minimal interface reduces MCU pin count and simplifies firmware versus I²C or SPI DCPs like the X9314WST1's alternatives.

Is the X9314WST1 available in a RoHS-compliant package?

Yes, the X9314WST1 is offered in an 8-lead MSOP package (M8.118) with Pb-free plus anneal construction-fully RoHS compliant and compatible with both SnPb and lead-free soldering processes. The "T1" suffix denotes tape-and-reel packaging, and the device meets IPC/JEDEC J-STD-020 moisture sensitivity level requirements for the X9314WST1.