Renesas X9315WMI-2.7T2

Overview

X9315WMI-2.7T2 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 wiper tap points, nonvolatile wiper position storage, and 2.7V–5.5V single-supply operation. It functions as a solid-state three-terminal potentiometer or two-terminal variable resistor in analog signal conditioning, bias trimming, and programmable gain control circuits.

For engineers reviewing the X9315WMI-2.7T2 datasheet, X9315WMI-2.7T2 pinout, X9315WMI-2.7T2 application, or X9315WMI-2.7T2 equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), MSOP-8 package, 10kΩ end-to-end resistance, low standby current (5µA max), and 3-wire serial interface compatibility with microcontroller GPIOs.

Technical Context

The X9315WMI-2.7T2 integrates a 5-bit up/down counter, nonvolatile memory for wiper position retention, and a resistor array with make-before-break wiper switching. Its control logic responds to CS (chip select), U/D (direction), and INC (edge-triggered increment) signals to set one of 32 discrete tap positions.

Operation requires VCC ≥ VH, VL, VW with no power sequencing constraints. Wiper resistance is 400–1000Ω at 2.7V supply, and absolute linearity error is ±1 MI (minimum increment = RTOTAL/31), enabling precise analog voltage division in closed-loop calibration systems.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, body dimensions 3.0mm × 3.0mm × 0.85mm, thermal resistance θJA = 154°C/W.

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-2.7T2 offers guaranteed nonvolatile position retention, simpler 3-wire control, and tighter absolute linearity (±1 MI vs. ±0.5% typical for alternatives), making it optimal for unattended calibration and industrial systems requiring deterministic startup behavior.

Availability

X9315WMI-2.7T2 is available at Aetrix Electronics and suitable for industrial motor control, programmable power supplies, and precision sensor signal conditioning requiring stable component supply and long-term calibration integrity.

Supply support for X9315WMI-2.7T2 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 family targets analog system calibration and trimming tasks, delivering solid-state reliability, nonvolatile memory retention, and low-voltage operation for industrial and embedded control systems.

FAQ

What is the maximum wiper current rating for the X9315WMI-2.7T2?

The X9315WMI-2.7T2 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 excessive self-heating that could degrade resistance stability or linearity. Exceeding this current may cause irreversible damage to the internal wiper switches or resistor elements.

Does the X9315WMI-2.7T2 require external components for basic operation?

No, the X9315WMI-2.7T2 operates autonomously with only VCC and VSS decoupling capacitors required. Its 3-wire interface (CS, U/D, INC) connects directly to MCU GPIOs without pull-ups, level shifters, or timing components. The internal nonvolatile memory eliminates need for external EEPROM, and the make-before-break wiper switching prevents need for external glitch suppression circuitry.

How does the X9315WMI-2.7T2 handle power-up initialization?

On power-up, the X9315WMI-2.7T2 automatically recalls the last wiper position stored in nonvolatile memory and applies it to the resistor array within 5µs. This ensures deterministic analog output without MCU intervention, critical for systems requiring immediate operational readiness-such as safety-critical power supplies or industrial sensors where undefined startup states are unacceptable.

Can the X9315WMI-2.7T2 be used in a two-terminal configuration?

Yes, the X9315WMI-2.7T2 supports two-terminal variable resistor operation by connecting either RH/VH or RL/VL to RW/VW and using the remaining fixed terminal with the wiper. This configuration provides digitally adjustable resistance from 0Ω to 10kΩ (±20%) and is commonly used in current-limiting networks, LED brightness control, and oscillator frequency tuning circuits.

What is the temperature coefficient of the X9315WMI-2.7T2's ratiometric performance?

The X9315WMI-2.7T2 exhibits a ratiometric temperature coefficient of ±20 ppm/°C, meaning the ratio of wiper voltage to end-to-end voltage remains highly stable across temperature. This enables accurate voltage division in applications like sensor excitation or reference scaling where supply voltage drift would otherwise introduce error-without requiring additional temperature compensation circuitry.