Renesas X9317WM8IZT1

Overview

X9317WM8IZT1 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array 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 for precision analog trimming in DC-biased circuits, operating from 2.7V to 5.5V with ±20% end-to-end resistance tolerance and <5µA standby current.

For engineers reviewing the X9317WM8IZT1 datasheet, X9317WM8IZT1 pinout, X9317WM8IZT1 application, or X9317WM8IZT1 equivalent, key selection considerations include its MSOP-8 package, -40°C to +85°C industrial temperature range, 10kΩ total resistance, solid-state reliability (100,000 write cycles, 100-year data retention), and compatibility with LCD bias control, laser diode biasing, and voltage regulator output adjustment.

Technical Context

The X9317WM8IZT1 integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps. Its resistor array uses temperature-compensated elements with ±300 ppm/°C total resistance TC and ±20 ppm/°C ratiometric TC, ensuring stable voltage division under thermal drift.

Control logic responds to CS (chip select), U/D (direction), and edge-triggered INC (increment) signals. Wiper position is stored in nonvolatile memory when CS rises while INC is high, and automatically recalled at power-up - enabling deterministic startup behavior without host initialization.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, moisture sensitivity level (MSL) 1, body dimensions 3.0mm × 3.0mm × 0.85mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP41HV51-103, the X9317WM8IZT1 uniquely combines 100-tap resolution, guaranteed power-up wiper recall, and industrial temperature rating in an MSOP-8 package - making it optimal for unattended, long-life analog trimming where deterministic startup and thermal stability are mandatory.

Availability

X9317WM8IZT1 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, and voltage regulator output adjustment requiring stable component supply across industrial temperature ranges and multi-year production cycles.

Supply support for X9317WM8IZT1 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 specializing in microcontrollers, analog power, and mixed-signal solutions for automotive, industrial, and IoT applications.

The X9317WM8IZT1 belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical trimmers in high-reliability analog signal conditioning and power management circuits.

FAQ

What is the operating temperature range for the X9317WM8IZT1?

The X9317WM8IZT1 is rated for -40°C to +85°C, qualifying it for industrial-grade applications such as programmable logic controllers, motor control interfaces, and outdoor communication equipment. This range is confirmed in the Ordering Information table on page 2 of FN8183 Rev.10.01, where "X9317WM8IZT1" is explicitly listed with "-40 to +85" under Temperature Range. The device maintains full specification compliance-including wiper position accuracy, resistance tolerance, and timing parameters-across this entire span.

Does the X9317WM8IZT1 retain its wiper position after power loss?

Yes, the X9317WM8IZT1 stores the wiper position in nonvolatile memory and automatically recalls it upon power-up. This behavior is intrinsic to the device architecture: when CS transitions high while INC is high, the current counter value is written to memory; at subsequent power-on, the stored value is loaded into the wiper register within 5µs (t_PU, page 6). No external components or host intervention are required - the X9317WM8IZT1 achieves fully autonomous startup calibration.

What package type does the X9317WM8IZT1 use?

The X9317WM8IZT1 uses an 8-lead MSOP (Mini Small Outline Plastic) package, designated as M8.118 per Renesas' package drawing documentation. Its dimensions are 3.0mm × 3.0mm × 0.85mm, with gull-wing leads and RoHS-compliant matte tin plating. This compact footprint supports high-density PCB layouts while maintaining thermal performance (θ_JA = 145°C/W) suitable for enclosed industrial enclosures.

Can the X9317WM8IZT1 operate from a 3.3V supply?

Yes, the X9317WM8IZT1 operates from 2.7V to 5.5V, fully supporting standard 3.3V logic and analog rails. Its ICC1 active current remains ≤80µA and ISB standby current stays <5µA at 3.3V, and all timing parameters-including t_CYC (2µs minimum) and t_IW (1–5µs wiper update)-are guaranteed across the full voltage range. This makes the X9317WM8IZT1 compatible with both 3.3V microcontrollers and legacy 5V systems without level-shifting.

How many wiper positions does the X9317WM8IZT1 provide?

The X9317WM8IZT1 provides exactly 100 discrete wiper tap positions, corresponding to a 7-bit counter (0–99 inclusive) decoded to select one of 99 resistive elements plus endpoints. This yields 1% resolution per step in voltage divider mode, as defined by the "100 wiper tap points" feature on page 1 and confirmed in the Potentiometer Specifications table (page 4), where resolution is specified as "1%" and absolute linearity is ±1 MI (Minimum Increment = [V(RH)−V(RL)]/99).