Renesas X9317WV8T1

Overview

X9317WV8T1 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array with 100 wiper tap positions, nonvolatile wiper position storage, and 3-wire up/down serial interface. It operates from 2.7V to 5.5V, delivers ±20% end-to-end resistance tolerance, and supports voltage divider or variable resistor configurations in precision analog trimming applications.

For engineers reviewing the X9317WV8T1 datasheet, X9317WV8T1 pinout, X9317WV8T1 application, or X9317WV8T1 equivalent, key selection criteria include its TSSOP-8 package, 10kΩ total resistance, -40°C to +85°C industrial temperature range, low 5µA standby current, and nonvolatile recall on power-up - all critical for embedded bias control and calibration systems requiring long-term setting retention.

Technical Context

The X9317WV8T1 integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps. Its "make-before-break" switching ensures continuity during wiper transitions, while temperature-compensated resistor elements deliver ±300 ppm/°C total resistance drift and ±20 ppm/°C ratiometric stability.

Control logic responds to CS (chip select), U/D (direction), and edge-triggered INC inputs. A HIGH-to-LOW transition on INC moves the wiper; CS returning HIGH with INC HIGH initiates nonvolatile store. Power-up automatically recalls the last stored position, enabling deterministic startup behavior without host initialization.

Key Specifications

Pinout & Package

Package: 8-lead TSSOP (RoHS-compliant, JEDEC MO-153 AC, M8.173 drawing), 4.4 mm × 3.0 mm footprint, 1.2 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP41010-I/P, the X9317WV8T1 uniquely combines 100-tap resolution, true nonvolatile recall, and minimal 3-wire interface - making it optimal for unattended, self-starting analog calibration systems where deterministic post-power-up behavior is mandatory.

Availability

X9317WV8T1 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, voltage regulator trimming, and precision DC offset adjustment requiring stable component supply across industrial temperature grades.

Supply support for X9317WV8T1 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 leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and infrastructure markets.

The X9317 family is designed specifically for solid-state replacement of mechanical potentiometers in analog trimming applications demanding nonvolatile setting retention, high reliability, and low-power operation.

FAQ

What is the operating voltage range for the X9317WV8T1?

The X9317WV8T1 operates from 2.7 V to 5.5 V, supporting both 3.3 V and 5 V systems without level-shifting. This wide supply range enables direct compatibility with common microcontroller I/O voltages and legacy 5 V analog circuitry. The device maintains full specification compliance-including 100-tap resolution, ±20% RTOTAL tolerance, and nonvolatile store functionality-across this entire range. Operation outside these limits may cause undefined behavior or permanent damage.

Does the X9317WV8T1 retain its wiper position after power cycling?

Yes, the X9317WV8T1 stores the wiper position in nonvolatile memory and automatically recalls it upon power-up. This feature eliminates the need for host MCU initialization code to restore settings, ensuring deterministic analog behavior from the first millisecond of operation. The memory retains data for 100 years and withstands 100,000 write cycles, making X9317WV8T1 suitable for field-calibrated instruments and maintenance-free embedded systems.

How many wiper positions does the X9317WV8T1 support, and what is the resolution?

The X9317WV8T1 provides 100 discrete wiper tap positions across its 99-resistor-element array, yielding 1% resolution per step. Each position corresponds to a specific voltage division ratio between RH and RL terminals, with absolute linearity error bounded by ±1 MI (minimum increment = [V(RH)−V(RL)]/99). This resolution supports fine-grained analog tuning in applications such as laser diode bias control and precision offset trim without requiring interpolation or external DACs.

What package type and footprint does the X9317WV8T1 use?

The X9317WV8T1 uses an 8-lead TSSOP package (JEDEC MO-153 AC, drawing M8.173), measuring 4.4 mm × 3.0 mm with 0.65 mm lead pitch. It features RoHS-compliant matte tin terminations and is rated for moisture sensitivity level (MSL) 1. This compact, surface-mount package supports high-density PCB layouts and is compatible with standard reflow profiles including Pb-free soldering per IPC/JEDEC J-STD-020.

Can the X9317WV8T1 be used as both a potentiometer and a rheostat?

Yes, the X9317WV8T1 supports both configurations: as a three-terminal potentiometer (RH–RW–RL) for voltage division, and as a two-terminal variable resistor (e.g., RH–RW or RW–RL) for current control. In rheostat mode, the unused terminal is left floating or tied to RW depending on application requirements. The device's 200 Ω typical wiper resistance and ±20% RTOTAL tolerance are specified for both topologies, and its make-before-break switching prevents open-circuit transients during wiper movement in either configuration.