Renesas X9313WST1

Overview

X9313WST1 from Intersil is a digitally controlled potentiometer (XDCP™) with 32 linear tap positions, 3-wire serial interface (CS/U/D/INC), nonvolatile wiper position storage, and ±V_CC terminal voltage capability. It implements a 31-element resistor array with make-before-break switching, operates at 3V–5.5V supply, and delivers 10 kΩ end-to-end resistance for precision analog trimming in signal conditioning circuits.

For engineers reviewing the X9313WST1 datasheet, X9313WST1 pinout, X9313WST1 application, or X9313WST1 equivalent, key selection criteria include its 10 kΩ RTOTAL, industrial temperature range (–40°C to +85°C), SOIC-8 package, nonvolatile recall on power-up, and compatibility with low-power microcontroller GPIO control without external pull-ups.

Technical Context

The X9313WST1 integrates a 5-bit up/down counter, decoder logic, and nonvolatile memory to control wiper position across 31 resistive elements. Its 3-wire interface uses edge-triggered INC with level-sensitive U/D and CS to enable deterministic tap stepping and atomic store-on-CS-high operations.

It supports both three-terminal potentiometer (voltage divider) and two-terminal variable resistor (current control) configurations. Terminal voltage tolerance of ±V_CC enables bipolar signal handling, while wiper resistance of 40 Ω (typ.) at V_CC = 5 V ensures minimal loading error in high-impedance feedback paths.

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 X9313WST1 uniquely combines 3-wire simplicity, guaranteed nonvolatile recall, and ±VCC terminal tolerance-making it optimal for cost-sensitive, single-channel analog trimming where power-cycle consistency is critical and I²C/SPI peripherals are unavailable or underutilized.

Availability

X9313WST1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, medical instrument gain setting, and audio level control requiring stable component supply and long-term parametric consistency.

Supply support for X9313WST1 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 IC specialist, now part of Renesas Electronics, delivering high-reliability solutions for industrial, infrastructure, and high-end consumer markets.

The X9313 family was designed specifically for solid-state replacement of mechanical potentiometers in trimming, calibration, and analog control applications-emphasizing nonvolatile retention, wide supply range, and robust AC/DC performance.

FAQ

What is the maximum allowable voltage across RH and RL terminals for X9313WST1?

The absolute maximum voltage difference |VH – VL| for X9313WST1 is 10 V, as specified in the "Recommended Operating Conditions" table on page 5 of the FN8177 datasheet. This limit applies regardless of VCC level and ensures safe operation of the internal resistor array and switching network. Exceeding this differential may cause irreversible damage to the wiper switches or resistive elements.

Does X9313WST1 retain its wiper position after power removal?

Yes, X9313WST1 stores the wiper position in nonvolatile memory and automatically recalls it upon power-up. The datasheet confirms 100-year data retention and 100,000 endurance cycles. This behavior occurs without host intervention-once stored (via CS HIGH while INC = HIGH), the value persists through power cycles, eliminating the need for boot-time reconfiguration firmware.

Can X9313WST1 operate with a 3.3 V supply?

Yes, X9313WST1 supports VCC from 3 V to 5.5 V, explicitly including 3.3 V operation. The "Ordering Information" table lists X9313Wxx variants with "-3" suffix (e.g., X9313WMZ-3) rated for 3–5.5 V, and DC Electrical Specifications on page 6 confirm ISB (active current) and ISB (standby current) are characterized across this range. Logic thresholds (VIH/VIL) remain compatible with standard 3.3 V CMOS levels.

What is the wiper resistance specification for X9313WST1 at 5 V supply?

The wiper resistance (RW) for X9313WST1 is 40 Ω (typical), 100 Ω (maximum), measured at VCC = 5 V with IW = (VH – VL)/RTOTAL, per the "Potentiometer Characteristics" table on page 5 of the datasheet. This low on-resistance minimizes insertion error in high-impedance divider networks and ensures predictable loading in op-amp feedback paths.

Is X9313WST1 pin-compatible with other X9313 variants in SOIC-8 package?

Yes, X9313WST1 shares identical pinout and SOIC-8 footprint with all X9313 variants in the same package (e.g., X9313WSZ, X9313WSIZ), as confirmed by the "Pin Descriptions" and "Pinouts" sections on pages 2 and 3 of FN8177. All variants use the same 8-pin topology: VCC, CS, INC, U/D, RH/VH, VSS, RL/VL, RW/VW - enabling drop-in substitution within the same RTOTAL and temperature grade.