Renesas X9317WS8Z

Overview

X9317WS8Z 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 functions as either a three-terminal voltage divider or two-terminal variable resistor in precision analog trimming applications.

For engineers reviewing the X9317WS8Z datasheet, X9317WS8Z pinout, X9317WS8Z application, or X9317WS8Z equivalent, key selection considerations include its 10kΩ total resistance, SOIC-8 package, -40°C to +85°C industrial temperature range capability (per X9317WS8IZ variant), nonvolatile store-and-recall behavior, and low 5µA standby current - all critical for embedded bias control and calibration circuits requiring power-cycle retention.

Technical Context

The X9317WS8Z integrates a 7-bit up/down counter, decoder, and solid-state wiper switching network that connects one of 100 tap points (0–99) across a 99-resistor array to the RW terminal. Its control logic responds to CS (chip select), U/D (direction), and edge-triggered INC (increment) signals, enabling deterministic wiper positioning without clock or data framing overhead.

Wiper position is retained in nonvolatile memory upon CS↑ with INC HIGH, and automatically recalled at power-up. The device exhibits ratiometric temperature coefficient of ±20 ppm/°C and absolute linearity of ±1 MI, supporting stable DC bias adjustment where resistor matching and thermal tracking matter more than absolute resistance accuracy.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (M8.15E), RoHS-compliant, 3.9 mm × 4.9 mm footprint, 1.27 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9317WS8Z, AD5171BRMZ-10 trades tap count and interface simplicity for I²C integration, while MCP4017T-103E/MS offers broader voltage support but sacrifices 36% resolution - making X9317WS8Z optimal for industrial 3.3/5 V systems demanding maximum analog trimming fidelity.

Availability

X9317WS8Z is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias adjustment, voltage regulator output trimming, and precision DC offset calibration requiring stable component supply across production lifecycles.

Supply support for X9317WS8Z 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 connectivity solutions for automotive, industrial, and IoT applications.

The X9317 product line delivers solid-state digital potentiometers optimized for precision analog trimming in space-constrained, power-sensitive systems where nonvolatile setting retention and simple GPIO-based control are essential.

FAQ

What is the total resistance value and tolerance of the X9317WS8Z?

The X9317WS8Z has a nominal total resistance (R_TOTAL) of 10 kΩ with a tolerance of ±20%, as specified in the Renesas FN8183 datasheet. This value is fixed per ordering option and applies across the full operating temperature range. The X9317WS8Z-2.7 variant maintains this same 10 kΩ value while supporting the extended 2.7 V to 5.5 V supply range. Tolerance impacts absolute voltage division accuracy but is mitigated by ratiometric performance in many trimming applications.

Does the X9317WS8Z retain its wiper position after power cycling?

Yes, the X9317WS8Z stores the wiper position in nonvolatile memory and automatically recalls it upon power-up. This occurs only if the position was previously stored via a CS↑ transition while INC is HIGH - a hardware-controlled write operation. The memory retains data for 100 years and withstands 100,000 write cycles, making X9317WS8Z suitable for factory-trimmed systems requiring persistent calibration without battery backup.

What package type and footprint does the X9317WS8Z use?

The X9317WS8Z uses an 8-lead narrow-body SOIC package (JEDEC MS-012, Renesas drawing M8.15E), measuring 3.9 mm × 4.9 mm with 1.27 mm lead pitch. It is RoHS-compliant and compatible with standard SOIC-8 PCB footprints and reflow profiles. Pin 1 is marked by a mold or ink identifier at the top-left corner; land pattern recommendations are provided in the M8.15E package drawing revision 0.

How does the 3-wire interface of the X9317WS8Z differ from I²C or SPI digital potentiometers?

The X9317WS8Z uses a dedicated 3-wire up/down interface (CS, U/D, INC) with no clock or data lines - unlike I²C or SPI devices that require address decoding, start/stop conditions, or byte framing. Each negative edge on INC moves the wiper one step in the direction set by U/D, and CS controls both activation and nonvolatile store initiation. This simplifies firmware, reduces MCU pin usage, and eliminates protocol overhead, making X9317WS8Z ideal for resource-constrained microcontrollers.

Can the X9317WS8Z operate from a 3.3 V supply?

Yes, the X9317WS8Z operates from 2.7 V to 5.5 V, fully supporting 3.3 V nominal supplies. Its logic thresholds (VIH = 0.7×V_CC, VIL = 0.1×V_CC) ensure reliable interfacing with 3.3 V GPIOs, and its 5 µA standby current remains valid across this range. The X9317WS8Z-2.7T1 variant explicitly guarantees performance down to 2.7 V, making it suitable for brown-out tolerant designs and mixed-voltage systems where 3.3 V rails may dip transiently.