Renesas X9317WV8IZ

Overview

X9317WV8IZ from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 100 wiper tap points, nonvolatile wiper position storage, and 3-wire up/down serial interface. It functions as a three-terminal voltage divider or two-terminal variable resistor in precision analog trimming applications, operating across -40°C to +85°C with 2.7V to 5.5V supply voltage and 10kΩ end-to-end resistance.

For engineers reviewing the X9317WV8IZ datasheet, X9317WV8IZ pinout, X9317WV8IZ application, or X9317WV8IZ equivalent, this device supports stable bias control in LCDs, laser diodes, and voltage regulators where power-up repeatability, low standby current (<5µA), and temperature-compensated linearity are critical selection criteria.

Technical Context

The X9317WV8IZ implements a 99-element resistor array with make-before-break wiper switching, enabling glitch-free tap transitions. Its 7-bit counter drives a decoder that selects one of 100 wiper positions, with wiper resistance specified at 200Ω (typ) at 5V and 400Ω (typ) at 2.7V.

Nonvolatile memory stores the last wiper position for automatic recall on power-up. Control logic responds to CS (chip select), U/D (direction), and edge-triggered INC inputs - store occurs only when CS rises while INC is high, ensuring deterministic configuration retention without unintended writes.

Key Specifications

Pinout & Package

Package: 8-lead TSSOP (RoHS-compliant, JEDEC MO-153 AC, M8.173 drawing), 4.4mm × 3.0mm body, 0.65mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ10 and MCP41010-I/P, the X9317WV8IZ provides guaranteed power-up repeatability without firmware or external memory, making it optimal for unattended industrial sensors and display modules where first-power behavior must be deterministic.

Availability

X9317WV8IZ is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, and voltage regulator output trimming requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9317WV8IZ 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 applications.

The X9317 series is part of Renesas' XDCP™ family designed specifically for solid-state replacement of mechanical potentiometers in analog trimming, offering nonvolatile storage, low power, and industrial temperature resilience.

FAQ

What is the guaranteed wiper position retention capability of the X9317WV8IZ after power removal?

The X9317WV8IZ retains its wiper position in nonvolatile memory for 100 years under normal operating conditions. This retention is specified across the full -40°C to +85°C temperature range and does not require external backup power or host intervention. The stored value is automatically loaded to the wiper on every power-up, ensuring repeatable startup behavior in the X9317WV8IZ without firmware initialization.

Does the X9317WV8IZ support operation at 2.7V supply, and how does that affect wiper resistance?

Yes, the X9317WV8IZ is fully specified for 2.7V to 5.5V operation. At 2.7V supply, wiper resistance increases to 400Ω (max), compared to 400Ω (max) at 5V. This is confirmed in the Potentiometer Specifications table on page 4 of FN8183 Rev.10.01. The higher resistance at lower VCC is accounted for in design margining for applications like laser diode bias where voltage drop across RW must remain within tolerance.

How is nonvolatile storage triggered in the X9317WV8IZ, and what timing constraints apply?

Nonvolatile storage in the X9317WV8IZ is triggered by a rising edge on CS while INC is held HIGH. The store cycle completes in 5–10ms (tWR), after which the device enters standby mode. During this time, no further INC edges are accepted. This sequence is explicitly defined in the Mode Selection table on page 9 and verified in the AC Electrical Specifications (tCPHS = 10ms CS deselect time for STORE).

Can the X9317WV8IZ be used in a two-terminal variable resistor configuration, and what is the maximum allowable current through RW–RL?

Yes, the X9317WV8IZ supports two-terminal operation between RW and RL. The absolute maximum wiper current (IW) is ±4.4mA, and the power rating for 10kΩ devices is 10mW. Therefore, maximum continuous current through RW–RL is limited to √(10mW / 10kΩ) ≈ 1mA to stay within both current and power limits - a constraint confirmed in the Potentiometer Specifications table on page 4.

What package variant and RoHS status does the X9317WV8IZ use?

The X9317WV8IZ uses an 8-lead TSSOP package (JEDEC MO-153 AC, drawing M8.173) and is Pb-free and RoHS compliant. This is explicitly stated in the Ordering Information table on page 2 of FN8183 Rev.10.01, where "X9317WV8IZ" maps to "8 Ld TSSOP", "RoHS Compliant", and temperature range "-40 to +85°C". The package marking "9317W IZ" further confirms this variant.