Renesas X9315WSIZT1

Overview

X9315WSIZT1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 wiper tap positions, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates from 2.7V to 5.5V, delivers ±20% end-to-end resistance tolerance, and supports industrial temperature range (–40°C to +85°C) in Pb-free SOIC-8 package. It functions as a three-terminal voltage divider or two-terminal variable resistor in analog signal trimming applications.

For engineers reviewing the X9315WSIZT1 datasheet, X9315WSIZT1 pinout, X9315WSIZT1 application, or X9315WSIZT1 equivalent, this page provides verified technical context, confirmed pin roles, real-world use cases in precision analog circuits, and validated alternative options for design flexibility and supply continuity.

Technical Context

The X9315WSIZT1 integrates a 5-bit up/down counter, 5-bit nonvolatile memory, and a 31-resistor ladder with make-before-break wiper switching. Wiper position is set via edge-triggered INC input under CS enable, with direction controlled by U/D logic level.

It stores wiper settings in EEPROM upon CS↑ while INC = HIGH, enabling automatic recall at power-up. Terminal voltages are bounded by VSS and VCC, and wiper resistance is 400–1000 Ω at 2.7V supply - critical for low-distortion analog signal paths.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (Pb-free), JEDEC MS-012-AA compliant, body dimensions 4.90 mm × 3.90 mm × 1.75 mm max.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-10 and MCP45HV51-103E/MS, the X9315WSIZT1 offers simpler 3-wire control with lower active current and identical industrial temperature rating-but trades off resolution for reduced GPIO overhead and deterministic timing.

Availability

X9315WSIZT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, laser diode biasing, audio signal level control, and programmable power supply feedback requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9315WSIZT1 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 X9315WSIZT1 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in analog signal-path tuning where reliability, nonvolatility, and temperature stability are critical.

FAQ

What is the supply voltage range supported by the X9315WSIZT1?

The X9315WSIZT1 operates from 2.7 V to 5.5 V, making it compatible with both 3.3 V and 5 V systems. This wide VCC range allows direct integration into mixed-supply designs without level-shifting circuitry. The device maintains specified performance-including wiper resistance and RTOTAL tolerance-across the full range, as confirmed in the FN8179 Rev.2.00 datasheet Section "Recommended Operating Conditions".

Does the X9315WSIZT1 retain its wiper position after power cycling?

Yes, the X9315WSIZT1 stores the wiper position in nonvolatile EEPROM memory. Upon power-up, it automatically recalls the last stored value, ensuring consistent analog settings without host MCU intervention. This behavior is guaranteed for 100 years of data retention and survives ≥100,000 store cycles-verified in the "Endurance and Data Retention" table on page 7 of the FN8179 datasheet.

What package type and lead finish does the X9315WSIZT1 use?

The X9315WSIZT1 uses an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, drawing M8.15) with Pb-free (RoHS-compliant) matte tin plating. Its dimensions are 4.90 mm × 3.90 mm × 1.75 mm max, and it is rated for industrial temperature operation (–40°C to +85°C), as documented in the "Ordering Information" table on page 2 of FN8179 Rev.2.00.

How many wiper positions does the X9315WSIZT1 provide, and what is the resolution?

The X9315WSIZT1 provides 32 discrete wiper tap positions across a 31-element resistor array, yielding 31 equal steps between RH and RL terminals. Resolution is defined as RTOTAL/31 ≈ 322 Ω per step for the 10 kΩ variant. Absolute linearity error is ±1 MI (minimum increment), and relative linearity is ±0.2 MI-values measured and specified in the "Potentiometer Characteristics" table on page 6 of FN8179 Rev.2.00.

Can the X9315WSIZT1 be used as a two-terminal variable resistor?

Yes, the X9315WSIZT1 can operate as a two-terminal variable resistor by connecting either RH/VH or RL/VL to RW/VW and using the remaining terminal plus RW/VW as the adjustable element. This configuration is explicitly supported in the "Applications Information" section (page 11) and illustrated in "Basic Circuits" (page 12) of FN8179 Rev.2.00, enabling current-source tuning and bias adjustment without floating terminals.