Renesas X9317US8IZ

Overview

X9317US8IZ 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 functions as a three-terminal voltage divider or two-terminal variable resistor for precision DC bias adjustment, gain/offset trim, and laser diode bias control in industrial temperature range (-40°C to +85°C) applications.

For engineers reviewing the X9317US8IZ datasheet, X9317US8IZ pinout, X9317US8IZ application, or X9317US8IZ equivalent, this device supports stable analog trimming in power supplies, sensor signal conditioning, and LCD bias circuits where nonvolatile setting retention and low standby current (<5 µA) are critical selection criteria.

Technical Context

The X9317US8IZ 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 with ±300 ppm/°C total resistance TC and ±20 ppm/°C ratiometric TC.

Wiper movement follows make-before-break switching, enabling glitch-free transitions; store operation occurs on CS↑ with INC HIGH, requiring 5–10 ms, while wiper position stabilizes within 5 µs after power-up.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (M8.15E), RoHS-compliant, Pb-free, moisture sensitivity level per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-50 and MCP41050-I/P, the X9317US8IZ provides hardware-triggered nonvolatile store, simpler 3-wire control, and guaranteed power-up recall-reducing firmware overhead and eliminating external memory dependencies in resource-constrained designs.

Availability

X9317US8IZ is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, and voltage regulator output trimming requiring stable component supply, industrial temperature qualification, and long-term calibration retention.

Supply support for X9317US8IZ 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 timing solutions for automotive, industrial, and IoT markets.

The X9317 family delivers solid-state digital potentiometers optimized for precision analog trimming in industrial systems where nonvolatile setting retention, low power, and temperature stability are mandatory.

FAQ

What is the maximum wiper current rating for the X9317US8IZ?

The X9317US8IZ supports a maximum wiper current (IW) of ±4.4 mA across the full operating temperature range. This rating applies when the voltage difference between RH and RL is within the device's specified supply limits (2.7 V to 5.5 V). Exceeding this current may cause irreversible wiper resistance drift or damage due to localized heating in the 99-element resistor array. The X9317US8IZ datasheet specifies IW = [V(RH) − V(RL)] / RTOTAL, confirming safe operation at ≤4.4 mA under all valid bias conditions.

Does the X9317US8IZ require an external clock or microcontroller to retain its wiper position after power loss?

No, the X9317US8IZ does not require an external clock or microcontroller to retain its wiper position after power loss. It contains integrated nonvolatile memory that automatically stores the current wiper position upon receipt of a hardware store command (CS↑ with INC HIGH). Upon subsequent power-up, the X9317US8IZ recalls this stored value and sets the wiper accordingly-no external intervention or firmware initialization is needed. This autonomous behavior is intrinsic to the X9317US8IZ design.

Can the X9317US8IZ operate from a 3.3 V supply, and what is its active current draw at that voltage?

Yes, the X9317US8IZ operates fully within its specified 2.7 V to 5.5 V supply range, making 3.3 V a valid and commonly used VCC. At 3.3 V, the X9317US8IZ draws ≤80 µA active current (ICC1) during wiper increment/decrement operations and ≤5 µA standby current (ISB) when CS is HIGH. These values are confirmed across the full -40°C to +85°C industrial temperature range and do not require derating at 3.3 V.

How does the X9317US8IZ handle wiper movement across multiple taps, and is there any risk of temporary short-circuiting?

The X9317US8IZ uses make-before-break switching during wiper movement, meaning multiple adjacent taps connect briefly to RW during transitions. This avoids open-circuit glitches but temporarily reduces effective RTOTAL if moving several positions rapidly. The X9317US8IZ datasheet specifies tIW (INC to RW change) as 1–5 µs, during which overlapping connections occur. No permanent short-circuit risk exists, but designers should avoid rapid multi-tap sequences in high-precision voltage divider applications where momentary RTOTAL reduction could affect settling time.

What package type and lead finish does the X9317US8IZ use, and is it compatible with standard SOIC reflow profiles?

The X9317US8IZ uses an 8-lead narrow-body SOIC package (JEDEC MS-012, drawing M8.15E) with 100% matte tin (e3) lead finish, RoHS-compliant and compatible with both SnPb and Pb-free soldering. Its thermal profile aligns with IPC/JEDEC J-STD-020 requirements for Pb-free reflow, including peak temperatures up to 260°C. The X9317US8IZ datasheet confirms MSL classification per TB363 and references Pb-free reflow profile TB493-ensuring compatibility with standard automated assembly processes.