Renesas X9317UM8-2.7

Overview

X9317UM8-2.7 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%, low standby current (<5 µA), and 200 Ω typical wiper resistance. Used for precision DC bias adjustment in analog signal chains.

For engineers reviewing the X9317UM8-2.7 datasheet, X9317UM8-2.7 pinout, X9317UM8-2.7 application, or X9317UM8-2.7 equivalent, this page delivers verified specifications, package mapping, real-world use scenarios, and validated alternative options - all confirmed against Renesas FN8183 Rev.10.01 and official ordering data.

Technical Context

The X9317UM8-2.7 integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 99 resistive elements. Its 3-wire serial interface (CS, U/D, INC) enables deterministic tap selection with make-before-break switching and power-up recall of last stored position.

It operates as either a three-terminal voltage divider (RH–RW–RL) or two-terminal variable resistor (RW–RL or RW–RH), supporting ratiometric temperature coefficient of ±20 ppm/°C and absolute linearity of ±1 MI. Wiper movement is edge-triggered on INC with direction controlled by U/D state while CS is low.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (RoHS-compliant, JEDEC MO-187-AA compliant, M8.118 drawing). Dimensions: 3.0 mm × 3.0 mm × 1.1 mm max height. Thermal resistance θ_JA = 145 °C/W.

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 X9317UM8-2.7 uniquely delivers guaranteed power-up wiper recall without host intervention, making it the only option among the three for zero-initialization analog calibration in standalone or fail-safe systems.

Availability

X9317UM8-2.7 is available at Aetrix Electronics and suitable for LCD bias control, DC bias adjustment, and voltage regulator output control requiring stable component supply, long-term calibration retention, and RoHS-compliant packaging.

Supply support for X9317UM8-2.7 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 IoT applications.

The X9317 family is designed specifically for precision analog trimming in space-constrained, low-power systems - emphasizing nonvolatile calibration, wide supply range, and robust temperature performance.

FAQ

What is the supply voltage range for the X9317UM8-2.7?

The X9317UM8-2.7 operates from 2.7 V to 5.5 V, as specified in the "Potentiometer Specifications" table on page 4 of FN8183 Rev.10.01. This extended low-voltage capability enables direct use with 3.3 V and 2.8 V rails, unlike standard 5 V-only DCPs. The device maintains full functionality-including nonvolatile store and 100-tap resolution-across this entire range. X9317UM8-2.7 does not require separate logic and analog supplies.

Does the X9317UM8-2.7 retain its wiper position after power cycling?

Yes, the X9317UM8-2.7 stores the wiper position in nonvolatile memory and automatically recalls it upon power-up, as confirmed in the "Principles of Operation" section (page 8) and "Features" list (page 1). This behavior is guaranteed for 100 years with 100,000 write cycles. No external components or host initialization are needed - X9317UM8-2.7 resumes operation at the last stored tap immediately after V_CC stabilizes.

What is the pin-compatible package type for the X9317UM8-2.7?

The X9317UM8-2.7 uses an 8-lead MSOP package per ordering information on page 2 of FN8183 Rev.10.01 (PKG. DWG. # M8.118). It shares identical footprint, pad layout, and mechanical dimensions with other X9317 variants in MSOP (e.g., X9317WM8Z-2.7), enabling drop-in replacement within the same temperature grade. Pin numbering and functions match Figure 1 and the "Pin Descriptions" table on page 3.

How does the X9317UM8-2.7 handle wiper movement during rapid INC toggling?

The X9317UM8-2.7 uses make-before-break switching during wiper transitions, meaning multiple taps connect briefly to RW during movement - preventing open-circuit glitches. As stated on page 8, this can temporarily reduce effective RTOTAL if moving several positions at once. The maximum wiper transition time is 5 µs (t_PW), and INC cycle time is 2 µs minimum, allowing up to 500 kHz adjustment rate. X9317UM8-2.7 does not wrap around at extremes.

What is the maximum wiper current rating for the X9317UM8-2.7 at 2.7 V supply?

At V_CC = 2.7 V, the X9317UM8-2.7 supports a maximum wiper current (I_W) of ±4.4 mA, per the "Potentiometer Specifications" table on page 4. Wiper resistance rises to 1000 Ω max under these conditions, limiting power dissipation to <10 mW for RTOTAL ≥ 10 kΩ. Exceeding ±4.4 mA risks exceeding absolute maximum ratings and may degrade long-term reliability. X9317UM8-2.7 must not be used in high-current shunt or power-setting roles.