Renesas X9317WV8I-2.7

Overview

X9317WV8I-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 (±20% tolerance), low standby current (<5 µA), and ±300 ppm/°C total resistance temperature coefficient. It serves as a solid-state replacement for mechanical potentiometers in precision analog trim applications such as laser diode bias control and voltage regulator output adjustment.

For engineers reviewing the X9317WV8I-2.7 datasheet, X9317WV8I-2.7 pinout, X9317WV8I-2.7 application, or X9317WV8I-2.7 equivalent, this page delivers verified specifications, validated TSSOP-8 pin mapping, real-world use cases for DC bias and gain trim, and two confirmed alternative parts with documented functional and parametric differences.

Technical Context

The X9317WV8I-2.7 integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps. Its resistor array uses 99 matched elements with ratiometric temperature coefficient of ±20 ppm/°C, ensuring stable voltage division under thermal drift.

Control is implemented via a 3-wire serial interface (CS, U/D, INC) with negative-edge-triggered INC and make-before-break wiper switching. Wiper position is stored on CS↑ while INC = HIGH, enabling reliable power-up recall without external configuration.

Key Specifications

Pinout & Package

Package: 8-lead TSSOP (RoHS-compliant, JEDEC MO-153 AC, M8.173 drawing), 4.4 mm × 3.0 mm body, 0.65 mm pitch, −40°C to +85°C operating 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 MCP41HV51-103E/MF, the X9317WV8I-2.7 uniquely combines guaranteed 2.7 V operation, nonvolatile storage, and 100-tap resolution in a TSSOP-8 package-enabling self-contained analog trim in space-constrained, low-voltage industrial modules without host processor dependency.

Availability

X9317WV8I-2.7 is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias control, voltage regulator output control, and gain/offset trim applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9317WV8I-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 leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT markets, with strong emphasis on reliability and long-term support.

The X9317 series is part of Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in high-reliability analog trim applications where nonvolatile setting retention and temperature stability are critical.

FAQ

What is the minimum supply voltage required for reliable operation of the X9317WV8I-2.7?

The X9317WV8I-2.7 is explicitly rated for operation down to 2.7 V, as confirmed in the "Potentiometer Specifications" table on page 4 of FN8183 Rev.10.01. This 2.7 V minimum enables direct use with 3.3 V systems and brown-out tolerant designs, unlike standard 5 V-only DCPs. The device maintains full functionality-including wiper movement, nonvolatile store, and 100-tap resolution-at this voltage, with wiper resistance specified up to 1000 Ω maximum.

Does the X9317WV8I-2.7 retain its wiper position after power loss?

Yes, the X9317WV8I-2.7 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This behavior is guaranteed by design: when CS transitions HIGH while INC is HIGH, the current counter value is written to EEPROM. Data retention is rated for 100 years, and endurance is specified at 100,000 write cycles-making it suitable for field recalibration without wear-out concerns.

What package type and footprint does the X9317WV8I-2.7 use?

The X9317WV8I-2.7 uses an 8-lead TSSOP package per JEDEC MO-153 AC (drawing M8.173), with 0.65 mm lead pitch, 4.4 mm × 3.0 mm body size, and −40°C to +85°C temperature rating. Pin 1 is marked with a dot or notch; the recommended land pattern is provided on page 12 of FN8183 Rev.10.01. This compact RoHS-compliant package supports high-density PCB layouts in space-constrained industrial modules.

How does the X9317WV8I-2.7 interface with a microcontroller?

The X9317WV8I-2.7 uses a simple 3-wire up/down serial interface: CS (active-low chip select), U/D (direction control), and INC (negative-edge-triggered increment). No clock or data lines are needed-toggling INC while CS is LOW moves the wiper one tap in the direction set by U/D. This minimal interface reduces GPIO count and eliminates protocol overhead versus I²C or SPI DCPs, simplifying integration with resource-limited MCUs.

What is the absolute linearity specification for the X9317WV8I-2.7, and why does it matter?

The X9317WV8I-2.7 has absolute linearity of ±1 MI (Minimum Increment), defined as ±[V(RH)−V(RL)]/99. This means the worst-case deviation between actual and ideal wiper voltage is limited to one least-significant step across the full 0–99 range. In practice, this ensures calibrated gain or offset adjustments remain within ±1% accuracy-critical for meeting tight tolerances in sensor signal chains and power supply feedback networks.