Renesas X9315WM-2.7T1

Overview

X9315WM-2.7T1 from Intersil is a low-noise, low-power, 32-tap digitally controlled potentiometer (XDCP™) with nonvolatile wiper position storage, 10kΩ end-to-end resistance, 2.7V to 5.5V supply operation, and 8-lead MSOP package. It functions as a solid-state three-terminal potentiometer or two-terminal variable resistor in precision analog trimming applications requiring power-up repeatability.

For engineers reviewing the X9315WM-2.7T1 datasheet, X9315WM-2.7T1 pinout, X9315WM-2.7T1 application, or X9315WM-2.7T1 equivalent, this page provides verified specifications, terminal roles, real-world use cases, and validated alternative options for embedded control, signal conditioning, and parameter calibration circuits.

Technical Context

The X9315WM-2.7T1 implements a 31-element resistor array with 32 discrete tap points controlled by a 5-bit up/down counter and decoded via electronic switches. Wiper movement follows a make-before-break switching sequence, preventing open-circuit transients during position changes.

Its 3-wire serial interface (CS, U/D, INC) enables direct microcontroller integration without protocol overhead. Nonvolatile memory stores wiper position at power-down and recalls it on power-up, ensuring deterministic startup behavior across temperature ranges from 0°C to +70°C.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free), JEDEC MO-187AA compliant, dimensions 3.0mm × 3.0mm × 0.85mm (M8.118).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-10 and MCP41010-I/P, the X9315WM-2.7T1 uniquely delivers guaranteed power-up repeatability without host intervention, making it optimal for unattended or safety-critical trimming where deterministic startup is mandatory.

Availability

X9315WM-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, laser diode biasing, and audio signal trimming requiring stable component supply, long-term calibration retention, and RoHS-compliant packaging.

Supply support for X9315WM-2.7T1 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 X9315 product line delivers solid-state digitally controlled potentiometers optimized for analog trimming tasks where mechanical reliability, nonvolatile setting retention, and low-noise performance are essential.

FAQ

What is the maximum wiper current rating for the X9315WM-2.7T1?

The X9315WM-2.7T1 has a maximum wiper current rating of ±3.75mA under recommended operating conditions. This limit ensures safe operation within the 10mW maximum power rating and prevents irreversible resistance drift or contact degradation. Exceeding this current may compromise long-term wiper resistance stability and nonvolatile memory endurance.

Does the X9315WM-2.7T1 require an external clock or microcontroller to operate?

No, the X9315WM-2.7T1 operates autonomously using its 3-wire interface (CS, U/D, INC) with simple digital logic-level signals. It does not require an external clock source or microcontroller firmware-any GPIO-capable controller can drive the INC edge and U/D level directly. The device manages internal counting, decoding, and EEPROM storage independently.

How does the X9315WM-2.7T1 handle power-up sequencing?

The X9315WM-2.7T1 has no strict power-up sequencing requirements. As long as VCC is ≥ VH, VL, and VW, the device reliably recalls the last stored wiper position from nonvolatile memory within 5µs after VCC stabilizes. No external reset or initialization sequence is needed-the wiper is active and stable immediately upon power application.

Can the X9315WM-2.7T1 be used in a two-terminal configuration?

Yes, the X9315WM-2.7T1 supports both three-terminal potentiometer and two-terminal variable resistor configurations. In two-terminal mode, RH/VH and RW/VW (or RL/VL and RW/VW) are used, effectively creating a digitally adjustable series resistance. The 10kΩ RTOTAL and 32-tap resolution provide predictable, repeatable resistance values without mechanical wear.

What is the temperature coefficient of the X9315WM-2.7T1's total resistance?

The X9315WM-2.7T1 exhibits a total resistance temperature coefficient of ±300 ppm/°C across -40°C to +85°C. Its ratiometric temperature coefficient is tighter at ±20 ppm/°C, meaning the relative voltage division ratio remains highly stable even as absolute resistance varies with temperature-critical for precision gain-setting applications.