Renesas X9315WMT1

Overview

X9315WMT1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 discrete wiper tap positions, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates at 2.7V to 5.5V, draws ≤80µA active current, and maintains ±20% end-to-end resistance tolerance across temperature. It serves as a solid-state replacement for mechanical potentiometers in precision analog trimming applications such as sensor calibration and power supply feedback networks.

For engineers reviewing the X9315WMT1 datasheet, X9315WMT1 pinout, X9315WMT1 application, or X9315WMT1 equivalent, this page delivers verified specifications, validated package mapping to 8-lead SOIC, confirmed 3-wire control timing, nonvolatile memory behavior, and real-world use cases in voltage divider and variable resistor configurations.

Technical Context

The X9315WMT1 integrates a 5-bit up/down counter, 5-bit nonvolatile memory, and a 31-resistor ladder with make-before-break wiper switching. Wiper position is updated on negative-edge transitions of INC while CS is low, with direction controlled by U/D logic level.

Nonvolatile store occurs when CS rises high while INC is held high, initiating a 5–10ms EEPROM write cycle. The device powers up with the last stored wiper position recalled, and supports terminal voltages from VSS to VCC without restriction on ramp rate beyond 0.2–50 V/ms.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (JEDEC MS-012-AA), Pb-free, RoHS compliant, 3.90mm × 4.90mm footprint.

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 X9315WMT1 uniquely combines guaranteed nonvolatile wiper recall, ultra-low standby current (5µA), and simple 3-wire control-making it optimal for unattended, low-power, single-pot calibration tasks where deterministic power-up behavior is mandatory.

Availability

X9315WMT1 is available at Aetrix Electronics and suitable for sensor calibration, power supply trimming, and audio level control requiring stable component supply, long-term parametric consistency, and RoHS-compliant packaging.

Supply support for X9315WMT1 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) designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X9315WMT1 belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) family, engineered specifically for replacing mechanical trimpots in production calibration, field tuning, and closed-loop analog control systems where reliability and nonvolatile retention are essential.

FAQ

What is the package type and lead count for X9315WMT1?

The X9315WMT1 uses an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, M8.15E drawing), with dimensions 3.90mm × 4.90mm and 1.27mm lead pitch. It is Pb-free and RoHS compliant, with pin 1 marked by a notch or dot in the top-left corner of the package body.

Does X9315WMT1 retain its wiper position after power loss?

Yes, the X9315WMT1 stores the wiper position in nonvolatile memory. When CS rises high while INC is high, the current counter value is written to EEPROM (5–10ms store time). On subsequent power-up, the stored value is automatically recalled, restoring the last calibrated setting without host intervention.

What is the maximum wiper current rating for X9315WMT1?

The X9315WMT1 supports a maximum wiper current (I_W) of ±3.75mA under recommended operating conditions. Exceeding this may cause localized heating, resistance drift, or accelerated wear. Total power dissipation must remain ≤10mW across the entire resistor array.

Can X9315WMT1 operate from a 3.3V supply?

Yes, the X9315WMT1 is fully specified for VCC = 2.7V to 5.5V, making it compatible with standard 3.3V logic systems. At 3.3V, active current remains ≤80µA, wiper resistance increases to 400–1000Ω, and all timing parameters (e.g., t_CYC, t_IW) remain valid per datasheet AC specs.

How does the 3-wire interface of X9315WMT1 differ from I²C or SPI?

The X9315WMT1 uses a dedicated 3-wire protocol (CS/U/D/INC) with no clock line. Wiper movement is edge-triggered on INC (negative edge), direction set by U/D level, and device enabled by CS low. Unlike I²C/SPI, it requires no address decoding, ACK/NACK, or data framing-reducing MCU GPIO overhead and firmware complexity.