Renesas X9314WSZ-3T1

Overview

X9314WSZ-3T1 from Intersil is a solid-state, nonvolatile, digitally controlled potentiometer with 32 log-taper taps, 10kΩ end-to-end resistance, and three-wire up/down serial interface; it operates from 3V to 5.5V and stores wiper position in nonvolatile memory for automatic recall at power-up, enabling precision analog trimming in audio gain control circuits.

For engineers reviewing the X9314WSZ-3T1 datasheet, X9314WSZ-3T1 pinout, X9314WSZ-3T1 application, or X9314WSZ-3T1 equivalent, key selection considerations include its log taper response, 40Ω typical wiper resistance, ±1mA wiper current rating, -40°C to +85°C industrial temperature range, and compatibility with SOIC-8 PCB footprints and standard 3-wire digital control buses.

Technical Context

The X9314WSZ-3T1 implements a 5-bit up/down counter driving a 32-position decoder that selects one of 31 resistive elements in series; wiper movement follows make-before-break switching to prevent open-circuit transients during tap transitions. Nonvolatile storage is triggered by a CS↑ while INC = HIGH, retaining position for ≥100 years.

It supports bidirectional wiper control via dedicated U/D and edge-triggered INC inputs, with CS acting as both device enable and store command signal; the device enters standby mode (<500µA) when deselected, and exhibits ratiometric temperature coefficient of ±20ppm/°C for stable voltage-divider performance across temperature.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (M8.15), 3.9mm × 4.9mm body, 1.27mm pitch, 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 X9314WSZ-3T1, AD5243BRMZ10 offers dual-channel I²C control but lacks nonvolatile storage, while MCP41010-I/P provides finer 256-step resolution via SPI yet requires external state management-making X9314WSZ-3T1 uniquely suited for single-channel, self-contained, log-taper trimming where power-cycle persistence is mandatory.

Availability

X9314WSZ-3T1 is available at Aetrix Electronics and suitable for audio volume control, sensor offset calibration, laser diode bias trimming, and power supply feedback divider applications requiring stable component supply, long-term calibration retention, and industrial temperature resilience.

Supply support for X9314WSZ-3T1 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, designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X9314WSZ-3T1 belongs to Intersil's XDCP™ (eXternally Controlled Digital Potentiometer) family, engineered specifically for replacing mechanical potentiometers in trimming, calibration, and gain-control functions where reliability, programmability, and nonvolatile state retention are essential.

FAQ

What is the wiper resistance specification for the X9314WSZ-3T1, and how does it affect signal integrity?

The X9314WSZ-3T1 has a typical wiper resistance of 40Ω, with a maximum of 100Ω. This low value minimizes insertion loss and voltage drop when used in signal paths-especially critical in high-impedance audio or sensor interfaces. Because the wiper resistance remains stable across temperature and time, the X9314WSZ-3T1 preserves signal fidelity without introducing gain error or frequency-dependent attenuation in precision analog circuits.

Does the X9314WSZ-3T1 require external components to operate, or is it self-contained?

The X9314WSZ-3T1 is fully self-contained: no external capacitors, resistors, or memory devices are needed for basic operation. It draws power directly from a 3V–5.5V supply, uses only three digital control lines (CS, U/D, INC), and retains wiper position internally without external EEPROM. The only external requirements are proper PCB layout for noise immunity and adherence to SOIC-8 land pattern dimensions per JEDEC MS-012-AA.

Can the X9314WSZ-3T1 be used in a two-terminal variable resistor configuration, and what are the design implications?

Yes, the X9314WSZ-3T1 can be configured as a two-terminal variable resistor by connecting either VH/RH or VL/RL to VW/RW and using the remaining terminal with ground or signal. In this mode, total resistance varies from ~40Ω (wiper at end) to 10kΩ (wiper at opposite end). Designers must observe the ±1mA wiper current limit and avoid exceeding 10V differential across VH/RH–VL/RL to maintain reliability and linearity.

How does the log taper of the X9314WSZ-3T1 differ from linear taper digital potentiometers in practical use?

The X9314WSZ-3T1's log taper delivers unequal resistance steps-smaller increments near zero and larger ones near full scale-matching logarithmic human hearing response. This yields smooth, perceptually uniform volume changes in audio systems, unlike linear pots that produce abrupt loudness jumps at low settings. Its 32-tap log profile is optimized for applications where subjective linearity matters more than arithmetic step consistency.

What is the recommended procedure to store the current wiper position in nonvolatile memory on the X9314WSZ-3T1?

To store the current wiper position in nonvolatile memory on the X9314WSZ-3T1, assert CS LOW to enable the device, then toggle INC to move the wiper to the desired position. While CS remains LOW, ensure INC is held HIGH, then transition CS from LOW to HIGH. This rising edge of CS-while INC = HIGH-triggers immediate nonvolatile storage. The X9314WSZ-3T1 confirms completion by entering standby mode (<500µA), and the stored value will be recalled automatically at next power-up.