Renesas X9317ZM8

Overview

X9317ZM8 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array with 100 discrete wiper tap positions, nonvolatile wiper position storage, and 3-wire up/down serial interface. It operates as a three-terminal voltage divider or two-terminal variable resistor for precision analog trimming in DC bias, gain/offset, and laser diode control circuits at VCC = 2.7V to 5.5V.

For engineers reviewing the X9317ZM8 datasheet, X9317ZM8 pinout, X9317ZM8 application, or X9317ZM8 equivalent, key selection criteria include end-to-end resistance tolerance (±20%), wiper resistance (200Ω typ. at 5V), ratiometric temperature coefficient (±20 ppm/°C), noise performance (-120 dBV ref 1kHz), and nonvolatile endurance (100,000 cycles).

Technical Context

The X9317ZM8 integrates a 7-bit up/down counter, decoder, and solid-state wiper switching network that connects RW to one of 100 tap points across a monolithic resistor array. Wiper movement is edge-triggered via INC with direction controlled by U/D, while CS enables selection and initiates nonvolatile store on rising edge when INC is high.

Its architecture supports make-before-break switching during wiper transitions, enabling glitch-free adjustment but requiring attention to transient RTOTAL reduction during multi-step moves. Power-up recalls the last stored wiper position, and standby current remains below 5µA with CS high.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (RoHS-compliant, M8.118 drawing, 3.0mm × 3.0mm body, 0.65mm pitch).

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 X9317ZM8 provides autonomous nonvolatile recall without external memory or complex protocol stacks, making it optimal for standalone analog trimming where reliability and simplicity outweigh resolution demands.

Availability

X9317ZM8 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, voltage regulator feedback networks, and precision DC offset trimming requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for X9317ZM8 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 enterprise applications.

The X9317 series belongs to Renesas' XDCP™ digitally controlled potentiometer product line, engineered for high-reliability analog trimming in systems requiring nonvolatile setting retention, low noise, and wide supply voltage operation.

FAQ

What is the supply voltage range supported by the X9317ZM8?

The X9317ZM8 operates from 2.7V to 5.5V, covering both 3.3V and 5V logic systems. This dual-voltage capability allows direct integration into mixed-supply designs without level-shifting. The device meets specifications across this full range, including wiper resistance (200Ω typ. at 5V, 400Ω typ. at 2.7V) and standby current (<5µA). Its design eliminates the need for separate 5V-only or 3.3V-only variants.

How does the X9317ZM8 store and recall wiper position without external memory?

The X9317ZM8 embeds nonvolatile memory that retains the wiper position for 100 years. A store operation is triggered by raising CS high while INC is held high - no external EEPROM or MCU firmware overhead is required. On power-up, the device automatically recalls the last stored value and configures the wiper within 5µs. This autonomous behavior makes X9317ZM8 ideal for applications like factory-calibrated sensors or field-serviceable equipment where persistent settings must survive uncontrolled power cycles.

What is the significance of the ratiometric temperature coefficient specification for the X9317ZM8?

The X9317ZM8's ratiometric temperature coefficient of ±20 ppm/°C means its voltage division ratio remains stable over temperature - critical when used in feedback networks or bias references. Unlike absolute resistance tempco (±300 ppm/°C), ratiometric spec reflects how RH–RW and RW–RL resistances track each other, minimizing output voltage drift. This enables accurate trimming in temperature-varying environments such as automotive infotainment displays or industrial motor drives without additional compensation circuitry.

Can the X9317ZM8 be used in a two-terminal variable resistor configuration?

Yes, the X9317ZM8 supports two-terminal operation by connecting either RH or RL to RW (or leaving one terminal unconnected) to create an adjustable resistance between RW and the remaining fixed terminal. In this mode, total resistance varies from near-zero (wiper at terminal) to RTOTAL (wiper at opposite end). Designers must observe the 4.4mA max wiper current rating and 10mW power limit - especially important in current-sensing or LED bias applications where RW carries load current.

What package type is used for the X9317ZM8, and what are its key mechanical features?

The X9317ZM8 uses an 8-lead MSOP package per JEDEC MO-187-AA (drawing M8.118), measuring 3.0mm × 3.0mm with 0.65mm lead pitch. Key features include gull-wing leads for reliable reflow soldering, RoHS-compliant matte tin plating, and a 145°C/W junction-to-ambient thermal resistance. Its compact footprint suits space-constrained PCBs in portable instrumentation and telecom modules, while the exposed pad-less construction simplifies layout versus thermally enhanced variants.