Renesas X9314WPI

Overview

X9314WPI from Intersil is a solid-state nonvolatile digitally controlled potentiometer (XDCP™) with 32 log-taper taps, 10kΩ end-to-end resistance, and three-wire up/down serial interface; it serves as a precision trim element in analog signal conditioning circuits requiring power-up wiper recall and stable resistance adjustment over temperature.

For engineers reviewing the X9314WPI datasheet, X9314WPI pinout, X9314WPI application, or X9314WPI equivalent, this device supports ±5V terminal voltage operation, stores wiper position in nonvolatile memory with 100-year data retention, and delivers <500µA standby current-key selection criteria for low-power embedded trimming and calibration systems.

Technical Context

The X9314WPI implements a 5-bit up/down counter driving a 31-element resistor array with make-before-break electronic switches; wiper position is selected via CS, U/D, and edge-triggered INC inputs, enabling discrete tap control without microcontroller SPI peripherals.

Nonvolatile storage occurs on CS rising edge while INC is HIGH, and power-up automatically recalls the last stored position; the device operates across VCC = 3V to 5.5V and tolerates ±5V at VH/RH and VL/RL terminals independent of supply sequencing.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (M8.15), Pb-free plus anneal, RoHS compliant, 1.27mm pitch, body size 4.9mm × 3.9mm × 1.75mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ10 and MCP41010-I/P, the X9314WPI uniquely combines log taper, ±5V analog terminal capability, and autonomous nonvolatile recall-making it optimal for AC signal trimming and maintenance-free calibration where hardware simplicity and analog robustness are prioritized over digital bus integration or ultra-fine resolution.

Availability

X9314WPI is available at Aetrix Electronics and suitable for audio volume control, sensor calibration trim, laser diode bias adjustment, and industrial DAC output scaling requiring stable component supply and long-term calibration integrity.

Supply support for X9314WPI 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 X9314WPI belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered specifically for replacing mechanical trimmers in calibration-critical analog signal paths where reliability, nonvolatility, and bipolar signal handling are essential.

FAQ

What is the terminal voltage rating of the X9314WPI, and does it require VCC to be powered for analog signal operation?

The X9314WPI supports ±5V at VH/RH and VL/RL terminals relative to VSS, independent of VCC presence. However, VCC must be applied (3V–5.5V) for digital control and wiper movement; analog signal paths remain functional with only terminal voltages applied, though wiper position remains static without power. The X9314WPI's design allows safe biasing of AC signals even during power-down sequences.

How does the X9314WPI store and recall wiper position, and what is the timing requirement for nonvolatile write?

The X9314WPI stores the current wiper position in nonvolatile memory on the rising edge of CS while INC is held HIGH. This store operation completes within 20ms (tCPH), after which the device enters standby mode. Upon subsequent power-up, the stored value is automatically loaded into the counter and applied to the wiper-no external command or delay is needed. The X9314WPI retains this value for 100 years without backup power.

Can the X9314WPI be used as a two-terminal variable resistor, and what is its wiper resistance specification?

Yes, the X9314WPI can operate as a two-terminal variable resistor by connecting either VH/RH or VL/RL to VW/RW and using the remaining terminal with the other fixed end. Its wiper resistance is 40Ω typical (≤100Ω max) at ±1mA, ensuring low insertion loss in gain-setting or offset-adjustment configurations. This low RW value makes the X9314WPI suitable for precision op-amp feedback networks where parasitic resistance would otherwise degrade accuracy.

What is the difference between the log taper of the X9314WPI and linear-taper digital potentiometers, and where is log taper essential?

The X9314WPI's log taper provides geometrically increasing resistance per tap-approximating human perception of loudness and brightness-whereas linear pots deliver equal resistance change per step. Log taper is essential in audio volume controls and display dimming circuits to avoid "dead zones" at low settings and excessive sensitivity at high settings. The X9314WPI's native log response eliminates need for MCU-based lookup tables or external compensation networks.

Does the X9314WPI support simultaneous up/down direction changes during active control, and how is wiper movement synchronized?

Yes, the U/D input may be toggled dynamically while CS is LOW and the device is selected-enabling real-time reversal of wiper direction without interrupting control flow. Wiper movement is synchronized to negative edges of INC; each pulse advances or retreats the 5-bit counter by one position, with hard limits preventing wraparound beyond tap 0 or tap 31. This behavior ensures deterministic, glitch-free positioning in closed-loop calibration routines using the X9314WPI.