Renesas X9317WV8IT1

Overview

X9317WV8IT1 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 100 wiper tap points, nonvolatile wiper position storage, and 3-wire serial up/down interface. It implements a 99-element resistor array with temperature-compensated end-to-end resistance (±20% tolerance), operates from 2.7V to 5.5V, and delivers low standby current (<5 µA). It functions as a three-terminal voltage divider or two-terminal variable resistor in precision analog trimming applications.

For engineers reviewing the X9317WV8IT1 datasheet, X9317WV8IT1 pinout, X9317WV8IT1 application, or X9317WV8IT1 equivalent, key selection criteria include its TSSOP-8 package, -40°C to +85°C industrial temperature range, 10 kΩ end-to-end resistance, ±300 ppm/°C total resistance temperature coefficient, and nonvolatile store/recall capability for power-up reproducibility.

Technical Context

The X9317WV8IT1 integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 99 resistive elements. Its "make-before-break" switching ensures continuity during tap transitions, while the wiper remains bounded at endpoints without wraparound.

Control relies on CS (chip select), U/D (direction), and edge-triggered INC inputs. A HIGH-to-LOW transition on INC moves the wiper; storing to nonvolatile memory requires CS rising while INC is HIGH - initiating a 5–10 ms write cycle before entering standby mode.

Key Specifications

Pinout & Package

Package: 8-lead TSSOP (RoHS-compliant, JEDEC MO-153 AC, M8.173 drawing), dimensions 4.40 mm × 3.0 mm × 1.20 mm max, lead pitch 0.65 mm.

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 X9317WV8IT1 offers superior temperature stability (±20 ppm/°C ratiometric vs. ≥500 ppm/°C), guaranteed power-up repeatability via nonvolatile memory, and simpler 3-wire control - making it optimal for unattended, high-accuracy analog calibration in industrial and telecom hardware.

Availability

X9317WV8IT1 is available at Aetrix Electronics and suitable for LCD bias control, laser diode current regulation, and voltage regulator output trimming requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9317WV8IT1 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 trusted embedded solutions for automotive, industrial, and infrastructure markets.

The X9317 series is part of Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for high-reliability, low-drift analog trimming in mission-critical systems where mechanical potentiometers fail due to wear, contamination, or thermal instability.

FAQ

What is the operating temperature range for the X9317WV8IT1?

The X9317WV8IT1 is rated for industrial operation from -40°C to +85°C, as confirmed in the Ordering Information table (page 2) and Absolute Maximum Ratings (page 4) of the FN8183 Rev.10.01 datasheet. This range applies to all electrical specifications unless otherwise noted, and is validated for the TSSOP-8 package variant marked "IZ" - which matches the suffix in X9317WV8IT1.

Does the X9317WV8IT1 retain its wiper position after power loss?

Yes, the X9317WV8IT1 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This behavior is explicitly stated in the device description (page 1), block diagram (Figure 1), and Principles of Operation section (page 8). The memory endurance is rated at 100,000 write cycles, with 100-year data retention under specified conditions.

What package type and footprint does the X9317WV8IT1 use?

The X9317WV8IT1 uses an 8-lead TSSOP package per JEDEC MO-153 AC standard, with drawing number M8.173. Dimensions are 4.40 mm × 3.0 mm × 1.20 mm max and 0.65 mm lead pitch. Pin 1 identification is marked on the top surface, and the package is RoHS-compliant with matte tin terminations.

How is the wiper position stored in nonvolatile memory on the X9317WV8IT1?

Wiper position is stored by raising CS from LOW to HIGH while the INC input is held HIGH. This triggers a nonvolatile write cycle lasting 5–10 ms, after which the device enters standby mode. The procedure is detailed in the "Instructions and Programming" section (page 8) and verified in the Mode Selection table (page 9) of the FN8183 datasheet.

What is the end-to-end resistance value and tolerance for the X9317WV8IT1?

The X9317WV8IT1 has a nominal end-to-end resistance (RTOTAL) of 10 kΩ with a tolerance of ±20%, as specified in the Ordering Information table (page 2) and Potentiometer Specifications table (page 4). This value is fixed per part number variant and confirmed for all temperature ranges and supply voltages within specification.

Can the X9317WV8IT1 be used as both a potentiometer and a rheostat?

Yes, the X9317WV8IT1 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. This dual-mode capability is explicitly described on page 1 ("used as a three-terminal potentiometer… or as a two-terminal variable resistor") and illustrated in Figures 3 and 4.