Renesas X9317WS8I-2.7T2

Overview

X9317WS8I-2.7T2 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 100 wiper tap points, nonvolatile wiper position storage, and 3-wire serial up/down interface. It features 10 kΩ end-to-end resistance, operates from 2.7 V to 5.5 V, and delivers ±1% absolute linearity over –40°C to +85°C - enabling precise DC bias adjustment in industrial sensor signal conditioning circuits.

For engineers reviewing the X9317WS8I-2.7T2 datasheet, X9317WS8I-2.7T2 pinout, X9317WS8I-2.7T2 application, or X9317WS8I-2.7T2 equivalent, key selection considerations include its 2.7 V minimum supply, SOIC-8 package compatibility, nonvolatile recall on power-up, and wiper current rating of ±4.4 mA at 2.7 V operation.

Technical Context

The X9317WS8I-2.7T2 implements a 99-element resistor array with make-before-break wiper switching, driven by a 7-bit up/down counter decoded to select one of 100 tap positions. Its control logic responds to CS (active-low chip select), U/D (direction), and edge-triggered INC inputs - no clock required.

Wiper position is stored into nonvolatile memory when CS transitions high while INC is high, ensuring automatic restoration at next power-up. The device supports both three-terminal voltage divider and two-terminal variable resistor configurations, with temperature-compensated ratiometric tracking (±20 ppm/°C).

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (M8.15E), RoHS-compliant, rated for –40°C to +85°C industrial temperature range.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP41HV51-103, the X9317WS8I-2.7T2 uniquely combines 2.7 V operation, nonvolatile recall, and 3-wire simplicity - reducing firmware overhead and enabling true "set-and-forget" analog trimming in space-constrained 3.3 V designs.

Availability

X9317WS8I-2.7T2 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, voltage regulator tuning, and precision DC offset adjustment requiring stable component supply across industrial temperature ranges.

Supply support for X9317WS8I-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

Renesas Electronics is a global semiconductor manufacturer specializing in microcontrollers, analog power, and mixed-signal solutions for automotive, industrial, and IoT applications.

The X9317 family is designed for precision analog trimming in resource-constrained embedded systems - delivering solid-state reliability, nonvolatile configuration retention, and minimal MCU interface overhead.

FAQ

What is the operating temperature range for the X9317WS8I-2.7T2?

The X9317WS8I-2.7T2 is rated for –40°C to +85°C, meeting industrial-grade environmental requirements. This range is validated across all electrical specifications including absolute linearity (±1 MI), wiper resistance (≤400 Ω), and nonvolatile store timing (5–10 ms). The SOIC-8 package (M8.15E) maintains thermal performance within this span, with θ_JA = 115°C/W under standard JEDEC test conditions.

Does the X9317WS8I-2.7T2 retain its wiper position after power loss?

Yes, the X9317WS8I-2.7T2 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This occurs without host intervention: upon VCC stabilization, the internal circuitry loads the last stored 7-bit counter value and configures the wiper switch network accordingly. Data retention is specified for 100 years, and endurance supports 100,000 store cycles - confirmed per Renesas FN8183 Rev.10.01, page 5.

Can the X9317WS8I-2.7T2 operate from a 3.3 V supply?

Yes, the X9317WS8I-2.7T2 operates fully across 2.7 V to 5.5 V, making it compatible with standard 3.3 V systems. At 3.3 V, ICC1 active current remains ≤80 µA, standby current stays <5 µA, and wiper resistance is ≤400 Ω. All AC timing parameters (e.g., tCYC = 2 µs, tIW = 1–5 µs) and DC specs including ±1 MI linearity are guaranteed across this range per datasheet Section "Potentiometer Specifications" (page 4).

What is the maximum current the wiper terminal (RW) can handle on the X9317WS8I-2.7T2?

The X9317WS8I-2.7T2 wiper terminal (RW) supports ±4.4 mA continuous current, verified across the full –40°C to +85°C range and 2.7–5.5 V supply. This rating applies whether used in three-terminal voltage divider or two-terminal variable resistor mode. Exceeding this may cause irreversible resistance drift or wiper switch degradation - detailed in Absolute Maximum Ratings (page 4) and Potentiometer Specifications (page 4) of FN8183 Rev.10.01.

How does the 3-wire interface of the X9317WS8I-2.7T2 differ from I²C or SPI?

The X9317WS8I-2.7T2 uses an asynchronous 3-wire up/down interface (CS, U/D, INC) with no clock or data lines - unlike I²C or SPI. Wiper movement is controlled by toggling INC while CS is low; direction is set by U/D logic level. No firmware drivers, address decoding, or protocol stacks are needed. This reduces MCU resource usage and eliminates timing-critical bus arbitration - confirmed in "Principles of Operation" (page 8) and "Mode Selection" table (page 9) of FN8183 Rev.10.01.