Renesas X9317WS8Z-2.7

Overview

X9317WS8Z-2.7 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array with 100 wiper tap positions, nonvolatile wiper position storage, and 3-wire up/down serial interface. It operates from 2.7V to 5.5V, offers 10kΩ end-to-end resistance, ±20% tolerance, and supports voltage divider or variable resistor configurations in precision analog trimming applications.

For engineers reviewing the X9317WS8Z-2.7 datasheet, X9317WS8Z-2.7 pinout, X9317WS8Z-2.7 application, or X9317WS8Z-2.7 equivalent, key selection considerations include its 2.7V minimum supply operation, SOIC-8 package compatibility, nonvolatile recall on power-up, low 5µA standby current, and temperature-compensated ratiometric performance for stable bias control.

Technical Context

The X9317WS8Z-2.7 integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps. Its resistor array uses temperature-compensated elements yielding ±200 ppm/°C total resistance drift and ±20 ppm/°C ratiometric coefficient - critical for voltage reference stability.

Control logic responds to CS (chip select), U/D (direction), and edge-triggered INC inputs. Wiper movement follows make-before-break switching, and nonvolatile store occurs only when CS rises while INC is high - ensuring deterministic configuration retention without unintended writes during power transitions.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (M8.15E), RoHS-compliant, 0°C to +70°C operating range.

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 X9317WS8Z-2.7 uniquely combines 3-wire simplicity, guaranteed power-up recall, and industrial-grade temperature stability - making it optimal for unattended or safety-critical trimming where deterministic startup behavior is mandatory.

Availability

X9317WS8Z-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 commercial temperature range.

Supply support for X9317WS8Z-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 family was designed specifically for high-reliability analog trimming tasks - emphasizing nonvolatile retention, low power, and temperature-stable ratiometric performance in space-constrained PCB layouts.

FAQ

What is the minimum supply voltage required for reliable operation of the X9317WS8Z-2.7?

The X9317WS8Z-2.7 operates reliably from 2.7V to 5.5V. At 2.7V, wiper resistance increases to 400Ω typical (vs. 200Ω at 5V), and timing parameters such as tIW extend to 5µs max - all specified and tested per FN8183 Rev.10.01. This makes the X9317WS8Z-2.7 suitable for direct integration into 3.3V systems without regulation overhead.

How does the X9317WS8Z-2.7 retain its wiper position after power cycling?

The X9317WS8Z-2.7 stores the current wiper position in nonvolatile memory when CS rises while INC is held high. Upon subsequent power-up, the stored value is automatically recalled to the wiper register within 5µs, ensuring the device resumes operation at the last calibrated setting without MCU intervention - a core feature confirmed in Section 8 of the FN8183 datasheet.

Can the X9317WS8Z-2.7 be used in a two-terminal variable resistor configuration?

Yes, the X9317WS8Z-2.7 supports two-terminal operation by connecting either RH or RL to RW (wiper), effectively using the array as a digitally adjustable rheostat. The datasheet explicitly confirms this in Figure 4 and Applications Information section, with power rating limited to 10mW for RTOTAL ≥10kΩ - critical for current-sense or gain-setting applications.

What is the absolute linearity specification for the X9317WS8Z-2.7?

The X9317WS8Z-2.7 has an absolute linearity of ±1 MI (Minimum Increment), where 1 MI = (V(RH) − V(RL))/99. This means maximum deviation between actual and ideal wiper voltage is ±1/99 of the full-scale voltage span - verified across the full operating temperature range and directly specified in Table "Potentiometer Specifications" on page 4 of FN8183 Rev.10.01.

Does the X9317WS8Z-2.7 require external decoupling capacitors?

Yes, the X9317WS8Z-2.7 requires a 0.1µF ceramic capacitor placed as close as possible to the VCC and VSS pins. This is mandated in the Power-up and Down Requirements section (page 6) to suppress supply transients during wiper transitions and ensure stable operation of the internal CMOS logic and resistor array - especially critical during nonvolatile store cycles.