Renesas X9313WSMT2

Overview

X9313WSMT2 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 range, and 10kΩ end-to-end resistance - used for precision analog trimming in voltage reference and op-amp feedback networks.

For engineers reviewing the X9313WSMT2 datasheet, X9313WSMT2 pinout, X9313WSMT2 application, or X9313WSMT2 equivalent, key selection criteria include its 10kΩ RTOTAL tolerance (±20%), wiper resistance (40Ω typ at 5V), 3V–5.5V supply compatibility, -40°C to +85°C industrial temperature range, and MSOP-8 package footprint.

Technical Context

The X9313WSMT2 integrates a 31-element resistor ladder, 5-bit up/down counter, nonvolatile memory for power-up recall, and make-before-break wiper switching. Its control logic responds to negative-edge-triggered INC pulses while U/D sets direction, and CS enables operation or initiates nonvolatile store on high-going edge with INC high.

It operates as either a three-terminal potentiometer (RH/VH–RW/VW–RL/VL) or two-terminal variable resistor, with terminal voltages rated from –VCC to +VCC and absolute linearity error limited to ±1 MI (minimum increment = RTOTAL/31).

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Moisture Sensitivity Level 1, Pb-free, RoHS compliant, JEDEC MO-187-AA compliant, 3.0mm × 3.0mm body, 0.65mm pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9313WSMT2, AD5243BRMZ10 offers higher resolution and dual-channel capability but lacks guaranteed ±20% RTOTAL tolerance and requires I²C infrastructure; MCP41010-I/P provides SPI compatibility and identical RTOTAL tolerance but forfeits automatic power-up recall, demanding host-side wiper restoration logic.

Availability

X9313WSMT2 is available at Aetrix Electronics and suitable for voltage reference trimming, op-amp gain calibration, and comparator hysteresis control requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for X9313WSMT2 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 company, 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 analog signal conditioning, offering nonvolatile setting retention and digital interface simplicity for embedded calibration tasks.

FAQ

What is the supply voltage range supported by the X9313WSMT2?

The X9313WSMT2 operates from 3V to 5.5V DC. This range allows compatibility with both modern low-voltage systems and legacy 5V designs. The device's internal CMOS circuitry draws ≤3mA active current and ≤500µA standby current within this range, ensuring minimal power impact in battery-powered or thermally constrained applications. The X9313WSMT2 datasheet specifies performance parameters under these conditions, including wiper resistance and timing characteristics.

Does the X9313WSMT2 retain its wiper position after power loss?

Yes, the X9313WSMT2 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This occurs without external intervention - the stored value is loaded into the wiper counter within 10µs after VCC stabilizes. The memory endurance is rated for 100,000 write cycles, and data retention exceeds 100 years at +25°C. This behavior makes the X9313WSMT2 ideal for applications requiring repeatable startup states, such as factory-calibrated instruments or safety-critical bias settings.

What package type is used for the X9313WSMT2?

The X9313WSMT2 uses an 8-lead MSOP (Mini Small Outline Package) with 0.65mm lead pitch, 3.0mm × 3.0mm body dimensions, and Pb-free RoHS-compliant finish. It conforms to JEDEC MO-187-AA standards and has Moisture Sensitivity Level 1. The package supports standard reflow soldering profiles and is compatible with automated pick-and-place assembly. Pin 1 is marked by a notch or dot, and the pinout matches the standard X9313 MSOP configuration shown in the FN8177 datasheet.

Can the X9313WSMT2 be used with bipolar analog signals?

Yes, the X9313WSMT2 supports terminal voltages from –VCC to +VCC, enabling direct use with bipolar signals such as ±5V or ±12V. This allows implementation in AC-coupled circuits, dual-supply op-amps, and comparators without external level-shifting components. The resistor array remains functional across this full range, and the wiper maintains make-before-break operation regardless of signal polarity. Absolute maximum ratings specify ±6V on VH/VL/VW terminals relative to VSS, consistent with industrial signal chain requirements.

How does the 3-wire interface of the X9313WSMT2 differ from I²C or SPI protocols?

The X9313WSMT2 uses a proprietary 3-wire interface (CS, U/D, INC) rather than standardized protocols like I²C or SPI. It requires no address decoding, clock stretching, or ACK/NACK handshaking - wiper movement is controlled by simple edge-triggered INC pulses synchronized with U/D direction and CS enable. This reduces firmware overhead and GPIO count versus bus-based alternatives. Unlike I²C/SPI DCPs, the X9313WSMT2 does not support readback of wiper position or status registers, focusing solely on robust, low-complexity write-only trimming.