Renesas X9317UV8

Overview

X9317UV8 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 analog trimming in DC bias, gain/offset, and regulator output control circuits operating from 2.7V to 5.5V.

For engineers reviewing the X9317UV8 datasheet, X9317UV8 pinout, X9317UV8 application, or X9317UV8 equivalent, key selection criteria include end-to-end resistance tolerance (±20%), wiper resistance (200Ω typ. at 5V), standby current (<5µA), ratiometric temperature coefficient (±20 ppm/°C), and TSSOP-8 package compatibility with industrial temperature range (-40°C to +85°C).

Technical Context

The X9317UV8 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 the resistor array is temperature-compensated to maintain ratiometric stability.

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-enabling deterministic power-up recall without unintended writes during system initialization.

Key Specifications

Pinout & Package

Package: 8-lead TSSOP (RoHS-compliant, JEDEC MO-153 AC, M8.173 drawing), 3.0mm × 4.4mm body, 0.65mm pitch, 1.20mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-50 and MCP45HV51-503, the X9317UV8 offers simpler 3-wire control with guaranteed low wiper resistance (200Ω typ.) and proven ratiometric stability-making it optimal for cost-sensitive, thermally demanding analog trim where deterministic power-up behavior is mandatory.

Availability

X9317UV8 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, voltage regulator output programming, and precision DC offset trimming requiring stable component supply across industrial temperature ranges.

Supply support for X9317UV8 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 delivers solid-state potentiometer functionality with nonvolatile storage and low-noise analog performance-designed specifically for replacing mechanical trimpots in high-reliability, maintenance-free analog calibration systems.

FAQ

What is the maximum wiper current rating for the X9317UV8?

The X9317UV8 specifies a maximum wiper current (IW) of ±4.4mA across the operating temperature range. This limit applies regardless of wiper position and must not be exceeded to prevent degradation of wiper switch reliability or resistor array integrity. The X9317UV8 achieves this rating through optimized CMOS switch design and thermal layout in its TSSOP-8 package, supporting safe operation in current-sensing and bias-adjustment circuits.

Does the X9317UV8 require an external clock or microcontroller to operate?

No, the X9317UV8 operates autonomously using only three digital control lines: CS, U/D, and INC. It does not require an external clock source or microcontroller firmware-it functions as a self-contained digital potentiometer with built-in counter, decoder, and nonvolatile memory. The X9317UV8 can be manually adjusted via push-button inputs or driven by simple GPIOs, making it ideal for systems lacking processing resources.

How does the X9317UV8 handle power-up sequencing?

The X9317UV8 recalls its last-stored wiper position within 5µs after VCC reaches final value, provided VCC/VSS are applied before analog voltages. To prevent spurious wiper movement, the datasheet requires CS and INC to be held high during power-up ramp. The X9317UV8's internal power-on reset ensures deterministic behavior-no external POR circuitry is needed, simplifying system-level design.

Can the X9317UV8 be used in a two-terminal variable resistor configuration?

Yes, the X9317UV8 supports two-terminal operation by connecting RH and RL to fixed potentials and using RW as the adjustable terminal-effectively creating a digitally programmable resistor. In this mode, the device maintains its ±20% end-to-end resistance tolerance and 200Ω typical wiper resistance, enabling current control in LED drivers or sensor excitation circuits without requiring third-terminal connections.

What is the absolute linearity specification for the X9317UV8?

The X9317UV8 has an absolute linearity of ±1 MI (Minimum Increment), where 1 MI equals [V(RH) − V(RL)]/99. This means the worst-case deviation between actual wiper voltage and ideal linear interpolation is bounded by one least-significant tap step across the full 0–99 range. This specification is verified across the industrial temperature range (−40°C to +85°C) and ensures predictable transfer function behavior in precision trimming applications.