Renesas X9317ZM8T1

Overview

X9317ZM8T1 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, draws <5µA standby current, and delivers ±1% absolute linearity for precision voltage divider or variable resistor applications in LCD bias control and laser diode biasing.

For engineers reviewing the X9317ZM8T1 datasheet, X9317ZM8T1 pinout, X9317ZM8T1 application, or X9317ZM8T1 equivalent, key selection considerations include its 10kΩ end-to-end resistance, MSOP-8 package, -40°C to +85°C industrial temperature range, nonvolatile store/recall capability, and compatibility with low-power analog trimming circuits requiring stable wiper position retention across power cycles.

Technical Context

The X9317ZM8T1 integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps. Its "make-before-break" switching ensures continuity during wiper transitions, while temperature-compensated resistor elements maintain ratiometric stability within ±20 ppm/°C.

Control logic responds to CS (chip select), U/D (direction), and edge-triggered INC (increment) signals. Wiper position is stored in nonvolatile memory only when CS rises while INC is HIGH - a deterministic, single-cycle store command that avoids unintended writes during power-up or noise events.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Mo-187-AA compliant, 3.0 mm × 3.0 mm × 1.1 mm height, RoHS-compliant matte tin finish).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP41010-I/P, the X9317ZM8T1 offers deterministic 3-wire control without protocol overhead, guaranteed nonvolatile recall without software intervention, and tighter absolute linearity - making it optimal for safety-critical or maintenance-free analog trimming where power-cycle robustness is mandatory.

Availability

X9317ZM8T1 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, and voltage regulator output adjustment requiring stable component supply, long-term calibration retention, and industrial-temperature operation.

Supply support for X9317ZM8T1 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 infrastructure markets.

The X9317 family was designed specifically for solid-state replacement of mechanical potentiometers in precision analog trimming applications where reliability, nonvolatility, and temperature stability are critical - targeting industrial controls, optical modules, and medical instrumentation.

FAQ

What is the operating temperature range for the X9317ZM8T1?

The X9317ZM8T1 is rated for -40°C to +85°C, meeting industrial-grade requirements. This range is confirmed in the Ordering Information table (page 2) for part numbers with "IZ" suffix, and the X9317ZM8T1 explicitly matches that industrial temperature grade. All electrical specifications - including linearity, resistance tolerance, and timing - are guaranteed across this full range.

Does the X9317ZM8T1 retain its wiper position after power loss?

Yes, the X9317ZM8T1 stores wiper position in nonvolatile memory and automatically recalls it on power-up. This behavior is inherent to the device architecture: a store operation is triggered by a rising CS edge while INC is HIGH, and the value persists for 100 years per JEDEC standards. No external components or MCU code are required for retention - the X9317ZM8T1 restores its last-known setting autonomously.

What package type does the X9317ZM8T1 use, and is it RoHS-compliant?

The X9317ZM8T1 uses an 8-lead MSOP package (drawing M8.118), measuring 3.0 mm × 3.0 mm with 0.65 mm lead pitch. It is Pb-free and RoHS-compliant, using 100% matte tin plating (e3 termination finish) compatible with both SnPb and lead-free soldering processes, as documented in Notes 2 and 3 of the Ordering Information section.

Can the X9317ZM8T1 be used as a two-terminal variable resistor?

Yes, the X9317ZM8T1 supports two-terminal operation by connecting either RH or RL to RW and using the remaining terminal plus RW as the variable resistance element. The datasheet explicitly states this configuration is valid for current control, and the 10 kΩ end-to-end resistance, ≤400 Ω wiper resistance at 2.7V, and 10 mW power rating define safe operating limits in this mode.

How is the wiper position changed on the X9317ZM8T1?

The X9317ZM8T1 uses a 3-wire up/down interface: CS enables the device (LOW), U/D sets direction (HIGH = increment, LOW = decrement), and each negative edge on INC moves the wiper one tap. Movement halts at endpoints (0 or 99); no wraparound occurs. The wiper settles within 5 µs after INC transition, as specified in the tPU parameter on page 6.