Renesas X9313WST2

Overview

X9313WST2 from Intersil is a digitally controlled potentiometer (XDCP™) with 32 linear tap positions, 10 kΩ end-to-end resistance, 3-wire serial interface (CS/U/D/INC), and nonvolatile wiper position storage. It operates from 4.5 V to 5.5 V, supports ±VCC terminal voltages, and functions as a three-terminal voltage divider or two-terminal variable resistor in analog trimming applications.

For engineers reviewing the X9313WST2 datasheet, X9313WST2 pinout, X9313WST2 application, or X9313WST2 equivalent, key selection criteria include wiper retention on power-up, ±10 V terminal voltage tolerance, 31-element resistor array linearity, and compatibility with industrial temperature range (–40°C to +85°C) designs requiring stable analog adjustment without mechanical wear.

Technical Context

The X9313WST2 implements a 31-resistor ladder with make-before-break wiper switching, enabling glitch-free tap transitions. Its 5-bit up/down counter drives a decoder that selects one of 32 wiper positions, with wiper resistance typically 40 Ω at VCC = 5 V.

Nonvolatile memory stores the last wiper position upon CS↑ while INC = HIGH, ensuring automatic recall at power-up. The device enters standby mode (≤500 µA) when deselected, and supports full-scale terminal voltages from –VCC to +VCC - critical for bipolar signal conditioning circuits.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS compliant), 3.9 mm × 4.9 mm body, 1.27 mm lead pitch.

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 X9313WST2 uniquely delivers guaranteed power-up wiper recall without MCU involvement, making it optimal for unattended or safety-critical recalibration tasks where deterministic analog behavior is required immediately after power application.

Availability

X9313WST2 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and medical instrument offset adjustment requiring stable component supply and long-term parametric consistency.

Supply support for X9313WST2 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 deep expertise in high-reliability industrial and infrastructure solutions.

The X9313 family was designed specifically for solid-state replacement of mechanical potentiometers in analog trimming applications demanding nonvolatile setting retention, bipolar signal handling, and extended temperature operation.

FAQ

What is the operating voltage range for the X9313WST2?

The X9313WST2 operates from 4.5 V to 5.5 V on VCC. Its RH/VH and RL/VL terminals support voltages from –VCC to +VCC, enabling use in bipolar analog circuits. This specification is confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions sections of the FN8177 datasheet. The X9313WST2 does not support 3 V operation - that variant is designated X9313WST2-3.

Does the X9313WST2 retain its wiper position after power loss?

Yes, the X9313WST2 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This occurs without MCU intervention, provided the store command (CS↑ with INC = HIGH) was executed prior to power-down. Data retention exceeds 100 years per the datasheet's Endurance and Data Retention table. The X9313WST2 guarantees deterministic startup behavior critical for calibration-sensitive systems.

What package type is used for the X9313WST2?

The X9313WST2 uses an 8-lead SOIC package (Pb-free, RoHS compliant), outlined in drawing M8.15. Its dimensions are 3.9 mm × 4.9 mm with 1.27 mm lead pitch. This package is distinct from the MSOP (M8.118) and PDIP (MDP0031) variants offered in the X9313 family. The "T2" suffix in X9313WST2 indicates tape-and-reel packaging per TB347 specifications.

Can the X9313WST2 be used in a two-terminal variable resistor configuration?

Yes, the X9313WST2 can operate as a two-terminal variable resistor by connecting either RH/VH or RL/VL to RW/VW and using the remaining fixed terminal with RW/VW. This configuration is explicitly supported in the Applications Information section (Page 8) and maintains the same 10 kΩ end-to-end resistance and nonvolatile storage capability. The X9313WST2's make-before-break switching prevents open-circuit transients during adjustment.

What is the maximum allowable voltage difference between RH/VH and RL/VL on the X9313WST2?

The maximum voltage difference (ΔV = |VH – VL|) for the X9313WST2 is 10 V, as specified in the Absolute Maximum Ratings table for X9313W devices. This limit applies regardless of VCC level and ensures safe operation of the internal resistor array and switching elements. Exceeding 10 V risks permanent damage, and the X9313WST2 must be used within this constraint in all configurations - including voltage divider and variable resistor modes.