Renesas X9315WSZ-2.7

Overview

X9315WSZ-2.7 from Intersil is a low-noise, low-power, 32-tap digitally controlled potentiometer (XDCP™) with nonvolatile wiper position storage, 10kΩ end-to-end resistance, 2.7V to 5.5V supply range, and SOIC-8 Pb-free package. It functions as a solid-state three-terminal potentiometer or two-terminal variable resistor in analog signal conditioning and parameter trimming circuits.

For engineers reviewing the X9315WSZ-2.7 datasheet, X9315WSZ-2.7 pinout, X9315WSZ-2.7 application, or X9315WSZ-2.7 equivalent, key selection considerations include its 2.7V minimum VCC operation, ±20% RTOTAL tolerance, 5µA standby current, 3-wire serial interface timing (tCYC = 4µs), and guaranteed 100-year data retention in nonvolatile memory.

Technical Context

The X9315WSZ-2.7 implements a 31-element resistor array with 32 discrete tap points controlled by a 5-bit up/down counter and decoded switching network. Wiper position is set via CS, U/D, and edge-triggered INC inputs, and stored into EEPROM upon CS↑ with INC HIGH.

It operates in make-before-break mode during wiper transitions, supports terminal voltages from VSS to VCC, and maintains wiper position across power cycles using nonvolatile memory-enabling preset calibration recovery without external microcontroller intervention.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (Pb-free, JEDEC MS-012-AA, M8.15 footprint).

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 X9315WSZ-2.7 uniquely delivers autonomous power-up to last-saved position without host interaction-critical for embedded systems lacking persistent firmware state or real-time clocks.

Availability

X9315WSZ-2.7 is available at Aetrix Electronics and suitable for audio equipment, laser diode drivers, precision ADC references, and medical power supply trimming requiring stable component supply and long-term calibration integrity.

Supply support for X9315WSZ-2.7 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 X9315 product line delivers solid-state digital potentiometers optimized for analog trimming, calibration, and signal conditioning in commercial-temperature environments with emphasis on reliability, low power, and nonvolatile configuration retention.

FAQ

What is the minimum supply voltage required for reliable operation of the X9315WSZ-2.7?

The X9315WSZ-2.7 operates reliably from 2.7V to 5.5V. At 2.7V, wiper resistance rises to 400–1000Ω and active current remains ≤80µA. The device meets all AC timing specs (e.g., tCYC = 4µs) and retains full 32-tap functionality down to the 2.7V lower limit specified in FN8179 Rev.2.00.

Does the X9315WSZ-2.7 retain its wiper position after power removal?

Yes. The X9315WSZ-2.7 stores the current wiper position in nonvolatile EEPROM memory when CS transitions HIGH while INC is HIGH. Upon subsequent power-up, the stored value is automatically recalled, restoring the X9315WSZ-2.7 to its last-saved tap position without host intervention.

Can the X9315WSZ-2.7 be used as a two-terminal variable resistor?

Yes. The X9315WSZ-2.7 supports two-terminal operation by connecting either RH/VH or RL/VL to RW/VW externally, leaving the unused fixed terminal open or grounded. This configuration functions as a digitally adjustable current-limiting or gain-setting resistor, with resistance ranging from near-zero (tap 0 or 31) to 10kΩ.

What is the maximum allowable voltage difference between RH/VH and RL/VL terminals?

The absolute maximum voltage difference ΔV = |VH – VL| is 5V per FN8179 Rev.2.00 Absolute Maximum Ratings. Exceeding this risks irreversible damage to the internal resistor array. For safe operation, ensure VH and VL remain within 0V to VCC and their differential stays ≤5V regardless of supply voltage.

Is the X9315WSZ-2.7 RoHS compliant and lead-free?

Yes. The X9315WSZ-2.7 uses a Pb-free SOIC-8 package (JEDEC MS-012-AA, M8.15) with 100% matte tin plating (e3 termination finish), fully compliant with RoHS Directive 2011/65/EU and compatible with both SnPb and Pb-free soldering processes per Intersil TB347 and J-STD-020.