Renesas X9317WP-2.7

Overview

X9317WP-2.7 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 100 wiper tap points, nonvolatile wiper position storage, and 2.7V to 5.5V supply operation. It implements a 99-element resistor array with temperature-compensated end-to-end resistance tolerance of ±20%, wiper resistance ≤400Ω at 2.7V, and standby current <5µA. It serves as a three-terminal voltage divider or two-terminal variable resistor in precision analog trimming applications such as LCD bias control and laser diode bias adjustment.

For engineers reviewing the X9317WP-2.7 datasheet, X9317WP-2.7 pinout, X9317WP-2.7 application, or X9317WP-2.7 equivalent, key selection considerations include its 3-wire up/down interface timing (tCYC = 2µs), ratiometric temperature coefficient (±20 ppm/°C), noise performance (-120 dBV @ 1kHz), absolute linearity (±1 MI), and MSOP-8 package compatibility with industrial temperature range (-40°C to +85°C).

Technical Context

The X9317WP-2.7 integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps on a 99-resistor ladder. Its "make-before-break" switching ensures glitch-free transitions, and wiper position is retained for 100 years after power-down.

Operation relies on three digital inputs: CS (active-low chip select), U/D (direction control), and INC (negative-edge-triggered increment/decrement). A store command occurs when CS rises while INC is high, writing the current wiper value to EEPROM; recall occurs automatically at power-up.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, 3.0mm × 3.0mm footprint, 0.65mm pitch, 1.10mm max height.

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 X9317WP-2.7 uniquely combines 3-wire simplicity, guaranteed nonvolatile recall, sub-400Ω wiper resistance at 2.7V, and ±20 ppm/°C ratiometric stability - making it optimal for self-contained, low-power analog trimming where minimal MCU intervention and robust temperature performance are essential.

Availability

X9317WP-2.7 is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias control, voltage regulator output control, and offset voltage adjustment requiring stable component supply across commercial and industrial temperature grades.

Supply support for X9317WP-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 industrial, automotive, and infrastructure markets.

The X9317 family was designed specifically for precision analog trimming in space-constrained, low-power systems - emphasizing nonvolatile retention, temperature-stable ratiometric performance, and minimal interface overhead.

FAQ

What is the operating voltage range for the X9317WP-2.7?

The X9317WP-2.7 operates from 2.7V to 5.5V, supporting direct integration into 3.3V systems without level translation. This range is explicitly specified in the Absolute Maximum Ratings and Potentiometer Specifications tables of the FN8183 Rev.10.01 datasheet. Operation below 2.7V may result in unreliable wiper positioning or failure to store values in nonvolatile memory. The X9317WP-2.7 maintains full functionality-including 100-tap resolution, ±1 MI linearity, and <5µA standby current-across this entire supply range.

Does the X9317WP-2.7 retain its wiper position after power cycling?

Yes, the X9317WP-2.7 stores the wiper position in nonvolatile memory and automatically recalls it upon power-up. This behavior is guaranteed for 100 years per JEDEC standards and does not require external circuitry or host MCU intervention. The store operation is triggered by a rising edge on CS while INC is held high; once stored, the value persists through power loss. This feature is intrinsic to the X9317WP-2.7 architecture and confirmed in the Principles of Operation and Applications Information sections of the datasheet.

What package type is used for the X9317WP-2.7?

The X9317WP-2.7 is supplied in an 8-lead MSOP package (package drawing M8.118), measuring 3.0mm × 3.0mm with 0.65mm lead pitch. This RoHS-compliant, surface-mount outline is verified in the Ordering Information table (Page 2) and Package Outline Drawings (Page 11) of FN8183 Rev.10.01. The MSOP variant offers superior thermal resistance (θJA = 145°C/W) compared to SOIC or TSSOP, making it suitable for compact, thermally constrained PCB layouts where the X9317WP-2.7 operates near its 10mW power rating.

How many wiper positions does the X9317WP-2.7 support?

The X9317WP-2.7 supports exactly 100 discrete wiper tap positions, corresponding to a 7-bit counter decoded across 99 resistive elements. This resolution is stated in the device title ("100 Taps") and confirmed in Figure 1 (Block Diagram), Pin Descriptions, and Potentiometer Specifications. Each tap represents 1% of full-scale resistance, enabling precise analog adjustments-for example, 9.9mV steps across a 1V reference. The wiper cannot wrap around; movement halts at tap 0 or 99, ensuring predictable endpoint behavior in the X9317WP-2.7.

What is the maximum wiper current rating for the X9317WP-2.7 at 2.7V supply?

At VCC = 2.7V, the X9317WP-2.7 supports a maximum wiper current (IW) of ±4.4mA, as specified in the Potentiometer Specifications table (Page 4). This rating applies regardless of wiper position and is validated across the full operating temperature range. Exceeding this current may cause irreversible resistance drift or increased wiper resistance. The corresponding wiper resistance is ≤1000Ω under these conditions, resulting in a worst-case voltage drop of 4.4mV at 4.4mA - a key design constraint when using the X9317WP-2.7 in current-sensing or low-voltage divider applications.