Renesas X9317UV8ZT1

Overview

X9317UV8ZT1 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 100 wiper tap points, nonvolatile wiper position storage, and 3-wire serial up/down interface. It implements a 99-element resistor array with temperature-compensated end-to-end resistance of 50 kΩ ±20%, operates from 2.7 V to 5.5 V, and delivers low noise (–120 dBV) for precision analog trimming in voltage regulator output control and laser diode bias circuits.

For engineers reviewing the X9317UV8ZT1 datasheet, X9317UV8ZT1 pinout, X9317UV8ZT1 application, or X9317UV8ZT1 equivalent, key selection criteria include its TSSOP-8 package, industrial temperature range (–40°C to +85°C), 5 µA standby current, ratiometric temperature coefficient (±20 ppm/°C), and compatibility with DC bias adjustment and gain/offset trim functions requiring nonvolatile setting retention.

Technical Context

The X9317UV8ZT1 integrates a 7-bit up/down counter, decoder, nonvolatile memory, and resistor array with make-before-break wiper switching. Its control logic responds to CS (chip select), U/D (direction), and edge-triggered INC inputs to move the wiper across 100 discrete positions.

Wiper position is stored in nonvolatile memory upon CS high transition while INC is high, enabling automatic recall at power-up. The device supports both three-terminal potentiometer (voltage divider) and two-terminal variable resistor (current control) configurations, with RH, RL, and RW terminals electrically equivalent to mechanical potentiometer terminals.

Key Specifications

Pinout & Package

Package: 8-lead TSSOP (RoHS-compliant, JEDEC MO-153 AC, M8.173 drawing), 4.4 mm × 3.0 mm footprint, 1.2 mm max height, 0.65 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP41010-I/P, the X9317UV8ZT1 offers native 50 kΩ resistance, simpler GPIO-driven control, and guaranteed ratiometric temperature stability-making it optimal for single-channel, voltage-divider-focused designs where minimal MCU overhead and thermal accuracy are critical.

Availability

X9317UV8ZT1 is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias control, and voltage regulator output control requiring stable component supply, long-term calibration retention, and industrial-temperature operation.

Supply support for X9317UV8ZT1 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 X9317UV8ZT1 belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in precision analog circuits where nonvolatile setting retention, low power, and thermal stability are essential.

FAQ

What is the operating temperature range for the X9317UV8ZT1?

The X9317UV8ZT1 is rated for industrial operation from –40°C to +85°C, as confirmed in the Ordering Information table on page 2 of FN8183 Rev.10.01. This range applies to all electrical specifications including end-to-end resistance tolerance, wiper resistance, and timing parameters. The device uses temperature-compensated resistor elements to maintain ratiometric stability across this full span.

Does the X9317UV8ZT1 require an external clock or microcontroller to function?

No, the X9317UV8ZT1 operates autonomously using only three GPIO signals: CS, U/D, and INC. It contains an internal 7-bit up/down counter and decoder, eliminating need for external clock sources or firmware intervention. The X9317UV8ZT1 responds directly to edge-triggered INC pulses and logic-level U/D state, making it compatible with simple logic controllers or manual push-button interfaces.

How is wiper position stored and recalled in the X9317UV8ZT1?

Wiper position is stored in nonvolatile memory when CS transitions from low to high while INC is held high-a dedicated store command sequence. Upon subsequent power-up, the X9317UV8ZT1 automatically recalls the last stored value and configures the wiper accordingly within 5 µs, as specified in the Power-up and Down Requirements section (page 6). This behavior is intrinsic to the X9317UV8ZT1 and requires no initialization code.

What is the maximum current rating for the wiper terminal (RW) of the X9317UV8ZT1?

The absolute maximum wiper current (IW) for the X9317UV8ZT1 is ±4.4 mA, as listed in the Absolute Maximum Ratings table (page 4). This limit applies regardless of RTOTAL value or supply voltage. Exceeding this current risks permanent damage to the internal wiper switches. For safe operation, design must ensure [V(RH) – V(RL)] / RTOTAL remains ≤4.4 mA-e.g., ≤220 mV across 50 kΩ.

Can the X9317UV8ZT1 be used in a two-terminal variable resistor configuration?

Yes, the X9317UV8ZT1 supports two-terminal operation by connecting either RH or RL to RW externally (per Figure 4, page 9), effectively creating a variable resistance between the remaining terminal and the shorted pair. In this mode, the device functions as a digitally adjustable rheostat with 100 discrete resistance values ranging from near-zero to 50 kΩ, retaining nonvolatile storage and temperature compensation.