Renesas X9315WMI

Overview

X9315WMI from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 wiper tap positions, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates from 2.7V to 5.5V, delivers ±20% end-to-end resistance tolerance, and supports industrial temperature range (–40°C to +85°C) in an 8-lead MSOP package. It functions as a three-terminal voltage divider or two-terminal variable resistor for precision analog trimming in sensor signal conditioning circuits.

For engineers reviewing the X9315WMI datasheet, X9315WMI pinout, X9315WMI application, or X9315WMI equivalent, this page provides verified technical context, confirmed pin roles, real-world use scenarios, validated alternatives, and supply support for industrial embedded designs requiring stable, nonvolatile resistance adjustment without mechanical wear.

Technical Context

The X9315WMI uses a 5-bit up/down counter driving a decoder that selects one of 32 wiper positions across a monolithic 31-resistor ladder. Wiper movement is controlled by edge-triggered INC input synchronized with U/D direction logic, and CS enables selection or initiates nonvolatile store on rising edge while INC is high.

Its resistor array features temperature-compensated elements with ±300 ppm/°C total resistance TC and ±20 ppm/°C ratiometric TC, ensuring stable voltage division over temperature. The wiper terminal exhibits 400 Ω typical resistance at 2.7V and maintains make-before-break switching to prevent open-circuit transients during multi-step moves.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), Pb-free, RoHS-compliant, body dimensions 3.0 mm × 3.0 mm × 0.85 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 X9315WMI offers guaranteed industrial temperature operation, 3-wire simplicity with no clock line, and tighter ratiometric TC-making it optimal for ruggedized analog trimming where interface minimalism and thermal stability are prioritized over tap count.

Availability

X9315WMI is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply trim, and medical instrument gain setting requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.

Supply support for X9315WMI 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 (now part of Renesas Electronics) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.

The X9315WMI belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in applications demanding nonvolatile memory, high reliability, and low-power digital control of analog resistance.

FAQ

What is the supply voltage range supported by the X9315WMI?

The X9315WMI operates from 2.7 V to 5.5 V, enabling compatibility with both 3.3 V and 5 V logic systems. This wide range eliminates the need for external level shifters when interfacing with mixed-voltage microcontrollers. The device maintains specified performance-including 80 µA active current and 32-tap resolution-across the entire range, as confirmed in the FN8179 Rev.2.00 datasheet Section "Recommended Operating Conditions".

Does the X9315WMI retain its wiper position after power loss?

Yes, the X9315WMI stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This behavior is guaranteed by its EEPROM-based storage architecture, rated for 100 years of data retention and 100,000 write cycles. The store operation is triggered by a rising edge on CS while INC is held HIGH, as detailed in the "Principles of Operation" section of the FN8179 datasheet.

What package type is used for the X9315WMI?

The X9315WMI is supplied in an 8-lead MSOP package (JEDEC MO-187AA, drawing M8.118), measuring 3.0 mm × 3.0 mm × 0.85 mm. It is Pb-free and RoHS-compliant, with matte tin (e3) termination suitable for both SnPb and lead-free reflow processes. This compact footprint supports high-density PCB layouts in space-constrained industrial and medical modules.

How many wiper positions does the X9315WMI provide?

The X9315WMI provides exactly 32 discrete wiper tap positions, corresponding to a 5-bit counter (0–31). These positions span the full resistor array composed of 31 series elements, with taps located at each node including both ends. Resolution is defined as RTOTAL/31 ≈ 322 Ω per step for the 10 kΩ version, as specified in the "Potentiometer Characteristics" table of FN8179.

Can the X9315WMI be used as a two-terminal variable resistor?

Yes, the X9315WMI can be configured 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 "Basic Configurations" section of the FN8179 datasheet and maintains the same 32-position resolution and nonvolatile storage functionality as the three-terminal mode.