Renesas X9313WMI

Overview

X9313WMI 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 power supply feedback loops, sensor calibration circuits, and programmable gain amplifiers.

For engineers reviewing the X9313WMI datasheet, X9313WMI pinout, X9313WMI application, or X9313WMI equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), MSOP-8 package compatibility, 3-wire control timing (tIW = 5µs), and nonvolatile recall on power-up without external memory.

Technical Context

The X9313WMI integrates a 31-element resistor ladder, 5-bit up/down counter, make-before-break wiper switching, and EEPROM-based nonvolatile storage. Its control logic responds to negative-edge-triggered INC pulses while U/D sets direction, and CS enables operation or initiates store-on-high transitions.

It operates as either a three-terminal potentiometer (RH/VH–RW/VW–RL/VL) or two-terminal variable resistor, with wiper resistance of 40Ω (typ.) at VCC = 5V, ±4.4mA max wiper current, and ratiometric temperature coefficient of ±20 ppm/°C - ensuring stable voltage division under thermal drift.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, Pb-free matte tin finish, body dimensions 3.0mm × 3.0mm × 0.85mm.

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 X9313WMI uniquely combines 3-wire simplicity, industrial temperature grade, and true nonvolatile recall - reducing firmware overhead and eliminating external memory in cost-sensitive embedded trim applications.

Availability

X9313WMI is available at Aetrix Electronics and suitable for power supply feedback trimming, sensor offset calibration, and programmable gain amplifier design requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for X9313WMI 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, delivering high-reliability solutions for industrial, infrastructure, and computing markets.

The X9313 family was designed specifically for replacing mechanical potentiometers in analog signal conditioning, power control, and calibration circuits where digital programmability, nonvolatile storage, and solid-state reliability are required.

FAQ

What is the maximum allowable voltage across RH and RL terminals for X9313WMI?

The X9313WMI supports ΔV = |VH − VL| up to 10V, as specified for X9313W-series devices in the Absolute Maximum Ratings table. This allows safe operation in ±5V systems and single-supply applications up to 10V total span. Exceeding this limit risks irreversible damage to the internal resistor array switches. Always ensure applied voltage remains within –VCC to +VCC at each terminal individually, and that the differential does not exceed 10V.

Does X9313WMI require an external clock or microcontroller to retain its wiper position after power loss?

No, the X9313WMI does not require external components to retain wiper position. It contains on-chip nonvolatile EEPROM that automatically stores the current wiper value when CS is raised high while INC is high. Upon subsequent power-up, the stored value is recalled and the wiper is positioned accordingly - making X9313WMI fully autonomous for power-cycle persistence without MCU intervention or external memory.

Can X9313WMI be used in a bipolar signal path with ±12V rails?

Yes, X9313WMI supports terminal voltages from –VCC to +VCC, and its absolute maximum rating permits VH and VL inputs up to ±6V relative to VSS. With VCC = 5V, this allows direct use in ±5V op-amp stages. For ±12V systems, a level-shifting interface or external clamping is required - the device itself cannot withstand ±12V on its terminals. The 10V ΔV limit and ±7V absolute rating constrain direct ±12V application.

How many wiper position changes can X9313WMI endure before failure?

The X9313WMI guarantees a minimum endurance of 100,000 data changes per bit in its nonvolatile memory, as confirmed in the Endurance and Data Retention section of the datasheet. This applies to wiper position writes (store operations). The resistor array and switching elements are rated for equivalent mechanical life, supporting repeated digital adjustment over decades of typical embedded system operation - far exceeding mechanical potentiometer reliability.

Is the X9313WMI pin-compatible with other members of the X9313 family such as X9313WSIZ?

Yes, all X9313 variants including X9313WMI and X9313WSIZ share identical pinouts across SOIC-8, MSOP-8, and PDIP-8 packages. The X9313WMI uses the MSOP-8 footprint (M8.118), and its pin assignments - VCC, VSS, CS, U/D, INC, RH/VH, RL/VL, RW/VW - match the standard X9313 pin map. Differences lie only in resistance value (10kΩ), temperature grade (–40°C to +85°C), and packaging - not pin function or layout.