Renesas X9317UP-2.7

Overview

X9317UP-2.7 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 10 kΩ end-to-end resistance, operates from 2.7 V to 5.5 V, and delivers ±1% absolute linearity for precision voltage divider or variable resistor applications in analog signal conditioning circuits.

For engineers reviewing the X9317UP-2.7 datasheet, X9317UP-2.7 pinout, X9317UP-2.7 application, or X9317UP-2.7 equivalent, key selection considerations include its low-power CMOS operation (<5 µA standby), temperature-compensated resistor array (±300 ppm/°C), make-before-break wiper switching, and MSOP-8 package compatibility with space-constrained industrial and consumer designs.

Technical Context

The X9317UP-2.7 implements a 99-element resistor ladder with electronically switched wiper access at 100 discrete tap points (0–99), controlled by CS, U/D, and edge-triggered INC signals. Its 7-bit counter drives a decoder that selects one wiper terminal connection per state, enabling monotonic movement without wraparound.

Wiper position is stored in nonvolatile memory upon CS↑ while INC = HIGH, ensuring power-up recall of last-set value. The device supports both three-terminal potentiometer (voltage divider) and two-terminal variable resistor (current control) configurations, with RH, RL, and RW terminals electrically isolated from digital control logic.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, 3.0 mm × 3.0 mm footprint, 1.10 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP41010-I/P, the X9317UP-2.7 offers native 3-wire up/down control without protocol overhead, guaranteed power-up wiper recall, and proven make-before-break switching-critical for analog stability in bias-sensitive applications where I²C/SPI latency or volatile initialization is unacceptable.

Availability

X9317UP-2.7 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, voltage regulator trimming, and precision DC offset adjustment requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for X9317UP-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 is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT applications.

The X9317 series belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical trimpots in analog signal conditioning, power management, and sensor calibration systems where reliability, programmability, and nonvolatile retention are essential.

FAQ

What is the operating voltage range for the X9317UP-2.7?

The X9317UP-2.7 operates from 2.7 V to 5.5 V, making it compatible with both 3.3 V and 5 V logic systems. This extended low-voltage capability allows direct integration into battery-powered or energy-efficient designs without external level-shifting circuitry. The X9317UP-2.7 maintains full functionality-including wiper movement, nonvolatile store, and linearity specs-across this entire range.

Does the X9317UP-2.7 retain its wiper position after power loss?

Yes, the X9317UP-2.7 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This behavior is guaranteed by design: when CS transitions HIGH while INC is HIGH, the current counter value is written to memory and retained for 100 years. The X9317UP-2.7 resumes operation at the last stored tap position without MCU intervention, enabling true "set-and-forget" analog calibration.

How many wiper positions does the X9317UP-2.7 support?

The X9317UP-2.7 supports exactly 100 discrete wiper tap positions (0 through 99), corresponding to a 99-element resistor ladder. Each step represents one Minimum Increment (MI) = (V_RH – V_RL)/99. This resolution provides sufficient granularity for most analog trim applications while maintaining robust noise immunity and predictable switching behavior in the X9317UP-2.7.

What package type is used for the X9317UP-2.7?

The X9317UP-2.7 is supplied in an 8-lead MSOP (Mini Small Outline Package) per drawing M8.118, with dimensions 3.0 mm × 3.0 mm and maximum height 1.10 mm. This compact RoHS-compliant package supports high-density PCB layouts and is compatible with standard reflow profiles, including Pb-free soldering per J-STD-020. The X9317UP-2.7's MSOP footprint matches other Renesas DCP variants for design reuse.

Can the X9317UP-2.7 be used as a two-terminal variable resistor?

Yes, the X9317UP-2.7 can be configured as a two-terminal variable resistor by connecting either RH or RL to RW and using the remaining terminal plus RW as the adjustable element. In this mode, it functions as a digitally programmable rheostat for current control applications such as laser diode bias or LED current limiting. The X9317UP-2.7 retains its 100-tap resolution, nonvolatile storage, and low standby current in this configuration.