Renesas X9317WPI

Overview

X9317WPI from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array with 100 discrete wiper tap positions. It operates as a three-terminal voltage divider or two-terminal variable resistor, features nonvolatile wiper position storage, and supports 2.7V to 5.5V supply for low-power bias trimming in precision analog circuits.

For engineers reviewing the X9317WPI datasheet, X9317WPI pinout, X9317WPI application, or X9317WPI equivalent, this device serves as a solid-state replacement for mechanical potentiometers in DC bias adjustment, laser diode control, and voltage regulator output tuning-where power-up repeatability, temperature-stable linearity, and 100k-cycle endurance are critical selection criteria.

Technical Context

The X9317WPI uses a 7-bit up/down counter decoded to select one of 100 wiper positions across a monolithic resistor array. Its "make-before-break" switching ensures continuity during wiper transitions, while nonvolatile memory retains the last stored position across power cycles.

Control is implemented via a 3-wire serial interface (CS, U/D, INC), where INC toggles on negative edges to increment/decrement the wiper under U/D direction control. CS high enables standby mode (<5 µA), and CS rising edge with INC high triggers nonvolatile store.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (M8.15E), RoHS-compliant, commercial temperature range (0°C to +70°C).

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 X9317WPI delivers guaranteed power-up repeatability without host dependency, tighter ratiometric temperature stability (±20 ppm/°C vs. ≥±100 ppm/°C), and lower noise-making it optimal for unattended or safety-critical analog calibration tasks.

Availability

X9317WPI is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, and voltage regulator output trimming requiring stable component supply, long-term calibration retention, and RoHS-compliant packaging.

Supply support for X9317WPI 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 mixed-signal, and power management ICs for industrial, automotive, and infrastructure markets.

The X9317WPI belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical trimmers in precision analog systems where reliability, repeatability, and zero-maintenance operation are essential.

FAQ

What is the supply voltage range supported by the X9317WPI?

The X9317WPI operates from 2.7 V to 5.5 V, covering both 3.3 V and 5 V logic domains. This wide range allows direct integration into mixed-voltage systems without level-shifting. The device meets specifications across its full voltage range, with active current ≤80 µA at 5 V and standby current <5 µA-ensuring robust performance in low-power designs. The X9317WPI datasheet specifies absolute maximum ratings up to +7 V on digital pins, but sustained operation must remain within the 2.7–5.5 V window.

Does the X9317WPI retain its wiper position after power loss?

Yes, the X9317WPI stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This behavior is intrinsic to the device architecture: a store operation is triggered when CS transitions high while INC is held high, and the value remains valid for 100 years per JEDEC qualification. Unlike volatile DCPs such as the MCP41010, the X9317WPI requires no external controller or firmware to restore calibration-making it ideal for standalone or fail-safe analog subsystems.

How many wiper tap positions does the X9317WPI provide, and what is its resolution?

The X9317WPI provides exactly 100 discrete wiper tap positions, corresponding to a 1% resolution step size across the full resistor array. This is achieved using a 99-element ladder network with taps at each node and both ends. The resolution is deterministic and monotonic, with absolute linearity specified at ±1 MI (Minimum Increment = [V(RH)−V(RL)]/99). This enables predictable, repeatable analog adjustments-such as ±10 mV trimming on a 1 V reference-without interpolation or software compensation.

What package type and pin count does the X9317WPI use?

The X9317WPI is packaged in an 8-lead narrow-body SOIC (Small Outline Integrated Circuit), per JEDEC MS-012 and Renesas package drawing M8.15E. It features standard 1.27 mm lead pitch, 3.9 mm body width, and 4.9 mm length. This through-hole-compatible surface-mount package supports automated assembly and offers proven thermal and mechanical reliability in commercial-temperature applications (0°C to +70°C). Pinout matches industry-standard DCP layouts, simplifying board reuse.

Can the X9317WPI be used as both a potentiometer and a rheostat?

Yes, the X9317WPI 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. Its internal architecture-99 matched resistive elements with electronically switched wiper-maintains consistent linearity and temperature behavior in either mode. Application figures in the X9317WPI datasheet explicitly show buffered reference generation (potentiometer) and laser diode bias (rheostat), confirming dual-mode suitability without derating or performance penalty.