Renesas X9317UV8Z

Overview

X9317UV8Z 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 features 50 kΩ end-to-end resistance, operates from 2.7 V to 5.5 V, and uses an 8-lead TSSOP package for LCD bias control and laser diode bias adjustment.

For engineers reviewing the X9317UV8Z datasheet, X9317UV8Z pinout, X9317UV8Z application, or X9317UV8Z equivalent, key selection criteria include its 50 kΩ RTOTAL, ±20% end-to-end resistance tolerance, 200 Ω typical wiper resistance at 5 V, -40°C to +85°C industrial temperature range, and compatibility with voltage regulator output control and gain/offset trim circuits.

Technical Context

The X9317UV8Z implements a resistor array of 99 precision elements with temperature-compensated tracking, enabling ratiometric stability within ±20 ppm/°C. Its 7-bit counter drives a decoder that selects one of 100 wiper positions via make-before-break switching.

Control relies on three dedicated digital inputs: CS (chip select), U/D (direction), and INC (negative-edge-triggered increment). Wiper position is stored in nonvolatile memory upon CS↑ with INC high and recalled automatically at power-up, ensuring deterministic startup behavior without external configuration.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ50 and MCP45HV51-503, the X9317UV8Z offers simpler 3-wire control, guaranteed nonvolatile recall at power-up, and tighter ratiometric temperature tracking-making it optimal for single-pot, low-pin-count, and thermally stable analog trim applications.

Availability

X9317UV8Z is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias adjustment, and voltage regulator output control requiring stable component supply, long-term calibration integrity, and industrial temperature operation.

Supply support for X9317UV8Z 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, power, and connectivity solutions for automotive, industrial, and IoT markets.

The X9317UV8Z belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in precision analog trimming, bias control, and calibration-critical embedded systems.

FAQ

What is the operating voltage range for the X9317UV8Z?

The X9317UV8Z operates from 2.7 V to 5.5 V, supporting both 3.3 V and 5 V systems. This wide supply range allows direct integration into mixed-voltage designs without level-shifting circuitry. The device maintains full functionality-including wiper movement, nonvolatile store, and recall-across this entire range, as verified in the FN8183 Rev.10.01 datasheet under Potentiometer Specifications.

Does the X9317UV8Z retain its wiper position after power loss?

Yes, the X9317UV8Z stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This behavior is guaranteed by design: when CS rises while INC is high, the current counter value is written to EEPROM and restored within 5 µs of VCC stabilization. The X9317UV8Z retains this setting for 100 years, making it ideal for applications like voltage regulator setpoint preservation where boot-time reprogramming is unacceptable.

How many wiper tap points does the X9317UV8Z provide?

The X9317UV8Z provides exactly 100 wiper tap points, corresponding to a 7-bit counter (0–99) driving a 99-element resistor ladder. Each tap represents a discrete resistance step of RTOTAL/99 ≈ 507 Ω for the 50 kΩ version. This resolution supports 1% incremental adjustments in voltage divider configurations and is confirmed in the "Principles of Operation" and "Potentiometer Specifications" sections of the FN8183 datasheet.

What package type is used for the X9317UV8Z?

The X9317UV8Z uses an 8-lead TSSOP package (JEDEC MO-153 AC, drawing M8.173), measuring 4.4 mm × 3.0 mm with 0.65 mm lead pitch. This RoHS-compliant, surface-mount package is optimized for high-density PCB layouts and supports standard reflow profiles. Pin configuration matches the generic X9317 TSSOP layout shown on page 3 of FN8183 Rev.10.01, with identical pinout ordering and thermal characteristics (θJA = 155°C/W).

Can the X9317UV8Z be used as a two-terminal variable resistor?

Yes, the X9317UV8Z can operate as a two-terminal variable resistor by connecting either RH or RL to RW and using the remaining terminal with the wiper. In this mode, resistance varies from near-zero (wiper at same terminal) to RTOTAL (wiper at opposite terminal). The datasheet explicitly confirms this capability on page 1 ("used as a two-terminal variable resistor for current control") and illustrates it in Figure 4, making it suitable for LED current limiting and laser diode bias applications.