Renesas X9317UV8-2.7

Overview

X9317UV8-2.7 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 100 wiper tap points, nonvolatile wiper position storage, and 2.7V to 5.5V supply operation. It implements a 99-element resistor array with temperature-compensated end-to-end resistance tolerance of ±20%, wiper resistance ≤1000Ω at 2.7V, and standby current <5µA. It serves as a three-terminal voltage divider or two-terminal variable resistor in precision analog trimming applications.

For engineers reviewing the X9317UV8-2.7 datasheet, X9317UV8-2.7 pinout, X9317UV8-2.7 application, or X9317UV8-2.7 equivalent, key selection considerations include its 8-lead TSSOP package, 50kΩ total resistance, -40°C to +85°C industrial temperature range, 3-wire up/down interface timing (tCYC = 2µs), and nonvolatile store capability requiring CS↑ with INC↑.

Technical Context

The X9317UV8-2.7 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 wiper transitions, while ratiometric temperature coefficient of ±20 ppm/°C maintains voltage division accuracy under thermal drift.

Operation relies on three digital inputs: CS (active-low chip select), U/D (direction control), and INC (negative-edge-triggered increment). Wiper position is stored in nonvolatile memory only when CS transitions high while INC is high - a deliberate, non-accidental write condition preventing unintended updates during power-up or noise events.

Key Specifications

Pinout & Package

Package: 8-lead TSSOP (RoHS-compliant, JEDEC MO-153 AC, M8.173 drawing), 4.40 mm × 3.0 mm footprint, 1.20 mm max height, 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 AD5175BRMZ-50 and MCP41HV51-503, the X9317UV8-2.7 uniquely delivers autonomous power-up wiper recall without host intervention, making it optimal for unattended or safety-critical trimming where guaranteed startup state is mandatory.

Availability

X9317UV8-2.7 is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias adjustment, and voltage regulator output trimming requiring stable component supply, long-term calibration retention, and industrial temperature operation.

Supply support for X9317UV8-2.7 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 Corporation is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and enterprise applications.

The X9317UV8-2.7 belongs to Renesas' XDCP™ (Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical trimmers in precision analog signal conditioning, bias control, and calibration-critical systems.

FAQ

What is the operating temperature range for the X9317UV8-2.7?

The X9317UV8-2.7 is rated for industrial operation from -40°C to +85°C. This range is confirmed in the Ordering Information table (Page 2) and applies to all electrical specifications unless otherwise noted. The device uses temperature-compensated resistor elements and maintains ratiometric linearity within ±20 ppm/°C across this full span, ensuring reliable performance in harsh environments like industrial PLCs or outdoor telecom equipment.

How does the nonvolatile store function work on the X9317UV8-2.7?

The X9317UV8-2.7 stores the current wiper position in nonvolatile memory only when the CS pin transitions from low to high while the INC pin is held high. This deliberate dual-signal requirement prevents accidental writes due to noise or power glitches. Once stored, the value is automatically recalled on every subsequent power-up, eliminating the need for host MCU initialization and guaranteeing repeatable startup behavior in the X9317UV8-2.7.

Can the X9317UV8-2.7 be used with a 3.3V microcontroller GPIO interface?

Yes - the X9317UV8-2.7 supports 3.3V logic directly. Its VIH threshold is VCC × 0.7 (min), so at VCC = 3.3V, VIH(min) = 2.31V, comfortably within standard 3.3V CMOS output swing. VIL(max) is VCC × 0.1 = 0.33V, ensuring clean low-level recognition. No level-shifting is required, and the device draws <10µA from control pins, minimizing GPIO loading in the X9317UV8-2.7.

What is the maximum wiper current rating for the X9317UV8-2.7 at 2.7V supply?

At VCC = 2.7V, the X9317UV8-2.7 specifies a maximum wiper current (IW) of ±4.4 mA. This limit is defined in the Absolute Maximum Ratings table (Page 4) and applies regardless of wiper position. Exceeding this current risks irreversible damage to the internal switch matrix. For current-control applications, ensure the voltage across RH–RL does not cause IW to exceed this value - e.g., with 50kΩ RTOTAL, max allowable voltage is 220 mV.

Is the X9317UV8-2.7 pin-compatible with other members of the X9317 family?

Yes - all X9317 variants, including the X9317UV8-2.7, share identical 8-lead TSSOP pinout and functional assignment per the Pin Descriptions table (Page 3). Differences are limited to RTOTAL (50kΩ), supply range (2.7–5.5V), temperature grade (-40°C to +85°C), and marking code (9317U FZ). This allows drop-in substitution within the same package footprint when design requirements align with those parameters of the X9317UV8-2.7.