Renesas X9317WM8-2.7

Overview

X9317WM8-2.7 from Renesas Electronics is a low-noise, low-power, 100-tap digitally controlled potentiometer (XDCP™) with nonvolatile wiper position storage, 10 kΩ end-to-end resistance, and 2.7–5.5 V supply operation. It implements a 99-element resistor array with make-before-break wiper switching and operates as either a three-terminal voltage divider or two-terminal variable resistor in precision analog trimming applications.

For engineers reviewing the X9317WM8-2.7 datasheet, X9317WM8-2.7 pinout, X9317WM8-2.7 application, or X9317WM8-2.7 equivalent, key selection considerations include its 2.7 V minimum supply compatibility, ±20% RTOTAL tolerance, 100-year data retention, 100,000-cycle endurance, and MSOP-8 package with verified 3-wire up/down interface timing.

Technical Context

The X9317WM8-2.7 integrates a 7-bit up/down counter, decoder, nonvolatile memory, and resistor array with 99 series elements and 100 accessible tap points. Wiper position is controlled via CS, U/D, and negative-edge-triggered INC signals, enabling deterministic, single-step movement without wraparound.

Its solid-state architecture provides temperature-compensated resistance (±300 ppm/°C total TC, ±20 ppm/°C ratiometric), low 200 Ω typical wiper resistance at 5 V, and <5 µA standby current. The device recalls stored wiper position on power-up and supports store-on-CS-high-with-INC-high programming mode.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, 3.0 mm × 3.0 mm × 1.1 mm body, 0.65 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP41HV51-103, the X9317WM8-2.7 uniquely combines 2.7 V operation, 100-tap resolution, nonvolatile recall, and 3-wire simplicity-making it optimal for space-constrained, low-power analog trim where deterministic startup behavior is essential.

Availability

X9317WM8-2.7 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, voltage regulator output adjustment, and precision DC offset trimming requiring stable component supply across commercial and industrial temperature ranges.

Supply support for X9317WM8-2.7 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

Renesas Electronics is a global semiconductor manufacturer headquartered in Tokyo, Japan, specializing in microcontrollers, analog mixed-signal devices, and power management ICs for automotive, industrial, and IoT applications.

The X9317 family is designed specifically for solid-state replacement of mechanical potentiometers in precision analog trimming, offering nonvolatile storage, low power, and robust digital interface for embedded calibration and adaptive bias control.

FAQ

What is the minimum supply voltage required for full functionality of the X9317WM8-2.7?

The X9317WM8-2.7 operates fully across 2.7 V to 5.5 V, with all specifications-including 100-tap resolution, nonvolatile store, and 3-wire interface timing-guaranteed at 2.7 V. This makes X9317WM8-2.7 compatible with 3.3 V systems and battery-powered applications where headroom is limited. Below 2.7 V, functionality is not assured per datasheet limits.

Does the X9317WM8-2.7 retain its wiper position after power cycling?

Yes, the X9317WM8-2.7 stores the last wiper position in nonvolatile memory and automatically recalls it upon power-up. This behavior is inherent to the device architecture and requires no external components or host intervention. The stored value persists for 100 years and withstands 100,000 store cycles, making X9317WM8-2.7 ideal for calibration-critical applications like sensor offset trimming.

How does the 3-wire interface of the X9317WM8-2.7 differ from standard SPI or I²C protocols?

The X9317WM8-2.7 uses a dedicated 3-wire up/down interface (CS, U/D, INC) rather than SPI or I²C. It requires no clock generation or data framing-wiper movement is controlled by toggling INC while holding U/D high or low. This reduces MCU resource usage and eliminates protocol overhead. Unlike SPI/I²C, X9317WM8-2.7 has no address or command byte; all operations are state-driven and deterministic.

What is the maximum wiper current rating for the X9317WM8-2.7 at 2.7 V supply?

At 2.7 V supply, the X9317WM8-2.7 supports a maximum wiper current (IW) of ±4.4 mA, with wiper resistance rising to 1000 Ω (max) under that condition. This defines the safe operating range for current-mode applications such as LED bias or programmable current sources. Exceeding ±4.4 mA risks exceeding the 10 mW total power rating and may degrade long-term reliability.

Can the X9317WM8-2.7 be used in a two-terminal variable resistor configuration?

Yes, the X9317WM8-2.7 can be configured as a two-terminal variable resistor by connecting either RH or RL to RW (or leaving one terminal unconnected), using RW and the remaining fixed terminal. In this mode, it functions as a digitally adjustable rheostat for current control, with resistance ranging from near-zero (wiper at terminal) to 10 kΩ (wiper at opposite end). The make-before-break switching ensures glitch-free transitions.