Renesas X9313WSIT2

Overview

X9313WSIT2 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 32-tap linear resistor array with nonvolatile wiper position storage, 3-wire serial interface (CS/U/D/INC), ±VCC terminal voltage capability, and 10 kΩ end-to-end resistance, used for precision analog trimming in power supply feedback loops, sensor calibration circuits, and programmable gain amplifiers.

For engineers reviewing the X9313WSIT2 datasheet, X9313WSIT2 pinout, X9313WSIT2 application, or X9313WSIT2 equivalent, key selection criteria include its 10 kΩ RTOTAL tolerance (±20%), -40°C to +85°C industrial temperature range, 8-lead SOIC package, nonvolatile recall on power-up, and compatibility with 3V–5.5V supply operation.

Technical Context

The X9313WSIT2 integrates a 31-element resistor ladder, 5-bit up/down counter, make-before-break wiper switching network, and EEPROM-based nonvolatile memory. Wiper position is controlled via edge-triggered INC input synchronized with U/D direction and CS enable, enabling deterministic tap stepping without glitches.

Its architecture supports both three-terminal potentiometer (voltage divider) and two-terminal variable resistor (current control) configurations. Terminal voltage range spans -VCC to +VCC, allowing bipolar signal handling, while wiper resistance remains ≤100 Ω at VCC = 5 V and wiper current is limited to ±4.4 mA.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS compliant), 3.9 mm × 4.9 mm body, 1.27 mm lead pitch, JEDEC MS-012-AA compliant.

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 X9313WSIT2 uniquely supports ±VCC terminal operation and offers guaranteed 100-year data retention-making it optimal for industrial sensor front-ends and power management ICs requiring robust, bipolar, long-life analog trimming.

Availability

X9313WSIT2 is available at Aetrix Electronics and suitable for power supply trimming, sensor calibration, programmable gain amplifiers, and comparator hysteresis control requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for X9313WSIT2 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 expertise in high-reliability industrial and infrastructure solutions.

The X9313 family was designed for solid-state replacement of mechanical potentiometers in embedded analog control loops-emphasizing nonvolatile retention, temperature stability, and interoperability with standard digital interfaces.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313WSIT2?

The X9313WSIT2 specifies ΔV = |VH − VL| ≤ 10 V for the X9313W variant, which includes X9313WSIT2. This limit applies regardless of VCC level and ensures safe operation of the internal resistor array and switches. Exceeding 10 V risks irreversible damage to the wiper switching network.

Does X9313WSIT2 support true bipolar operation with negative voltages applied to RH/VH or RL/VL?

Yes, X9313WSIT2 supports terminal voltages from -VCC to +VCC. When VCC = 5 V, RH/VH and RL/VL may swing from -5 V to +5 V relative to VSS. This enables direct use in dual-supply op-amp circuits without external level-shifting components-confirmed in the Absolute Maximum Ratings and Potentiometer Characteristics sections of FN8177 Rev 7.00.

How is the wiper position stored and recalled in X9313WSIT2?

X9313WSIT2 stores the current wiper position in EEPROM when CS transitions HIGH while INC is held HIGH. On subsequent power-up, the device automatically recalls that stored value and configures the wiper accordingly. No external controller action is needed for restoration-this behavior is intrinsic to the nonvolatile memory architecture described in the Principles of Operation section.

What is the wiper resistance specification for X9313WSIT2 and how does it affect circuit performance?

X9313WSIT2 has a typical wiper resistance of 40 Ω at VCC = 5 V (max 100 Ω). This series resistance introduces insertion loss in low-impedance paths-for example, in a 10 kΩ feedback divider, it contributes <0.1% gain error. However, in high-gain amplifier configurations or precision voltage references, this value must be included in error budgeting per the datasheet's RW parameter definition.

Can X9313WSIT2 be used in a two-wire (up/down only) interface mode without chip select?

No-X9313WSIT2 requires active CS control for all operations. The CS input enables the internal logic and determines whether an INC edge triggers wiper movement (CS LOW) or initiates nonvolatile store (CS HIGH with INC HIGH). Omitting CS violates the defined mode selection table and may result in undefined wiper behavior or failure to store settings.