Renesas X9313WMT1

Overview

X9313WMT1 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), nonvolatile wiper position storage, and ±VCC terminal voltage capability. It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits requiring power-up recall and low-power operation.

For engineers reviewing the X9313WMT1 datasheet, X9313WMT1 pinout, X9313WMT1 application, or X9313WMT1 equivalent, key selection criteria include its 10 kΩ RTOTAL tolerance (±20%), 5 µs INC-to-VW response time, 40 Ω typical wiper resistance at 5 V, and compatibility with 3–5.5 V supply rails in industrial temperature range (−40°C to +85°C).

Technical Context

The X9313WMT1 implements a 31-element resistor array 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 nonvolatile memory storing the last position for automatic recall on power-up.

Control logic operates via three dedicated inputs: CS enables device selection, U/D sets direction, and edge-triggered INC advances the wiper. A store operation occurs only when CS rises while INC is HIGH, placing the device into standby mode afterward.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS compliant), dimensions per JEDEC MO-187-AA, body size 3.0 mm × 3.0 mm × 0.95 mm.

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 X9313WMT1 offers simpler 3-wire control, guaranteed power-up recall without firmware dependency, and lower pin count - making it optimal for cost-sensitive, single-channel analog trimming where robustness and minimal host overhead are prioritized.

Availability

X9313WMT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical instrument offset trim, and laser diode bias adjustment requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant packaging.

Supply support for X9313WMT1 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 signal conditioning, offering nonvolatile memory, bipolar voltage handling, and industrial temperature resilience without microcontroller dependency.

FAQ

What is the maximum allowable voltage difference between RH/VH and RL/VL terminals for X9313WMT1?

The X9313WMT1 supports a maximum ΔV = |VH − VL| of 10 V under recommended operating conditions. This rating applies across its full industrial temperature range (−40°C to +85°C) and enables use in ±5 V signal paths. Exceeding this differential risks permanent damage to the internal resistor array or switching elements, as specified in Absolute Maximum Ratings on page 5 of the FN8177 datasheet.

Does X9313WMT1 require an external clock or microcontroller to retain wiper position after power loss?

No, X9313WMT1 does not require external components to retain wiper position. Its integrated nonvolatile memory stores the last wiper setting automatically upon a valid store command (CS rising edge with INC HIGH), and recalls it on subsequent power-up without MCU intervention. Data retention exceeds 100 years per specification, eliminating need for backup power or external EEPROM in standalone trimming applications.

Can X9313WMT1 be used in a two-terminal variable resistor configuration?

Yes, X9313WMT1 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 the wiper. This configuration is explicitly supported in the datasheet's Applications Information section (page 8) and maintains full 32-tap resolution and nonvolatile storage functionality, though total resistance range becomes 0 Ω to RTOTAL rather than the full three-terminal span.

What is the typical wiper resistance of X9313WMT1 and how does it affect circuit performance?

The typical wiper resistance of X9313WMT1 is 40 Ω at VCC = 5 V, with a maximum of 100 Ω. This series resistance introduces gain error in op-amp feedback networks and loading effects in high-impedance voltage dividers. For example, in a 10 kΩ RTOTAL configuration driving a 100 kΩ load, wiper resistance contributes <0.1% error - acceptable for most industrial trimming tasks but requiring compensation in metrology-grade designs.

Is X9313WMT1 compatible with 3.3 V logic systems?

Yes, X9313WMT1 is fully compatible with 3.3 V logic systems. Its VCC range is specified from 3 V to 5.5 V, and input thresholds (VIH = 2 V min, VIL = 0.8 V max) ensure reliable recognition of standard 3.3 V CMOS logic levels. The device draws only 3 mA active current at 3.3 V, maintaining low power consumption while delivering full 32-tap functionality and nonvolatile store capability.