Renesas X9319WS8ZT1

Overview

X9319WS8ZT1 from Intersil is a digitally controlled potentiometer (XDCP™) with 10 kΩ end-to-end resistance, 100 wiper tap points, and nonvolatile memory for power-up recall. It operates from 4.5 V to 5.5 V, supports 0–10 V terminal voltage, and functions as either a three-terminal voltage divider or two-terminal variable resistor in precision analog trimming applications.

For engineers reviewing the X9319WS8ZT1 datasheet, X9319WS8ZT1 pinout, X9319WS8ZT1 application, or X9319WS8ZT1 equivalent, key selection criteria include its 3-wire serial interface timing (tCYC = 4 µs), ±20% RTOTAL tolerance, 100-year data retention, 100,000-cycle endurance, and SOIC-8 package compatibility with industrial temperature range (-40°C to +85°C).

Technical Context

The X9319WS8ZT1 implements a 99-element resistor array with make-before-break wiper switching, enabling glitch-free transitions between 100 discrete tap positions. Its 7-bit up/down counter is directly controlled via CS, U/D, and edge-triggered INC inputs, with nonvolatile store initiated by CS↑ while INC = HIGH.

Wiper position is retained across power cycles and recalled within 500 µs of VCC stabilization. The device exhibits ratiometric temperature coefficient of ±20 ppm/°C and absolute linearity of ±1 MI, supporting stable DC bias and gain trim under thermal variation without external calibration.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (150 mil), Pb-free (RoHS compliant), JEDEC MS-012 / Intersil M8.15E outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ10 and MCP41010-I/P, the X9319WS8ZT1 offers deterministic 3-wire timing, guaranteed make-before-break operation, and superior ratiometric temperature coefficient (±20 ppm/°C vs. ±50 ppm/°C typical), making it optimal for analog-sensitive trimming where interface simplicity and thermal stability are prioritized over tap count.

Availability

X9319WS8ZT1 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, voltage regulator trimming, and precision DC offset adjustment requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for X9319WS8ZT1 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

Intersil Corporation (now part of Renesas Electronics) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, communications, and computing markets.

The X9319WS8ZT1 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in high-reliability analog signal conditioning and power control applications.

FAQ

What is the operating temperature range for the X9319WS8ZT1?

The X9319WS8ZT1 is rated for industrial operation from -40°C to +85°C. This range is validated per the datasheet's boldface limits for all key parameters including RTOTAL tolerance, linearity, and timing characteristics. The device maintains full functionality across this span without derating, supporting deployment in harsh environments such as factory automation and outdoor telecom equipment where thermal stability is critical. The X9319WS8ZT1 does not require external thermal compensation to meet spec.

Does the X9319WS8ZT1 require an external clock or microcontroller to function?

No, the X9319WS8ZT1 operates autonomously using only three digital control lines: CS, U/D, and INC. It contains an internal 7-bit up/down counter and decoder, eliminating need for external clock sources or firmware. A simple GPIO-based controller can drive the X9319WS8ZT1 by toggling INC on the falling edge while holding U/D steady - no timing-critical state machines or clock trees are required. This makes the X9319WS8ZT1 ideal for resource-constrained or cost-sensitive analog trimming tasks.

How is wiper position stored and recalled in the X9319WS8ZT1?

Wiper position is stored in nonvolatile memory when CS transitions HIGH while INC is held HIGH; the stored value is automatically recalled within 500 µs after VCC reaches regulation. The X9319WS8ZT1 retains this setting for 100 years with no power applied. Unlike volatile DCPs, the X9319WS8ZT1 does not require boot-time initialization or external EEPROM - the last-trimmed value persists across power cycles, ensuring repeatable analog performance in unattended systems.

Can the X9319WS8ZT1 be used with supply voltages other than 5 V?

The X9319WS8ZT1 is specified for VCC = 4.5 V to 5.5 V only. Operation outside this range violates Absolute Maximum Ratings and risks latch-up or parametric failure. While RH/RL terminals tolerate up to +12 V, the internal logic and memory circuitry depend strictly on regulated 5 V ±10%. Using the X9319WS8ZT1 with 3.3 V or 12 V supplies is not supported - doing so may cause erratic wiper movement, failed store operations, or permanent damage. Always regulate VCC to 5 V before connecting the X9319WS8ZT1.

What is the maximum allowable voltage across RH and RL terminals of the X9319WS8ZT1?

The X9319WS8ZT1 allows up to +10 V across RH and RL terminals with respect to VSS, as specified in the "Potentiometer Characteristics" table. Exceeding this limit risks exceeding the 25 mW power rating or damaging the resistor array. For example, applying 12 V across the 10 kΩ RTOTAL would dissipate 14.4 mW - still within rating - but combined with wiper current could exceed localized thermal limits. The X9319WS8ZT1 must never see >+10 V between RH and RL to ensure long-term reliability and linearity compliance.