Renesas X9315WSIZ-2.7T1

Overview

X9315WSIZ-2.7T1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 wiper tap points, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates from 2.7V to 5.5V, offers 10kΩ end-to-end resistance, ±20% tolerance, and −40°C to +85°C industrial temperature range. It serves as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits.

For engineers reviewing the X9315WSIZ-2.7T1 datasheet, X9315WSIZ-2.7T1 pinout, X9315WSIZ-2.7T1 application, or X9315WSIZ-2.7T1 equivalent, this device delivers deterministic wiper positioning, power-up recall of last stored setting, low 5µA standby current, temperature-compensated resistance, and RoHS-compliant 8-lead SOIC (Pb-free) packaging - critical for embedded analog calibration and long-life industrial systems.

Technical Context

The X9315WSIZ-2.7T1 integrates a 5-bit up/down counter, nonvolatile memory for wiper position retention, and a 31-resistor ladder with make-before-break wiper switching. Its control logic responds to CS-select, U/D direction, and negative-edge-triggered INC signals to increment or decrement wiper position.

Wiper movement is constrained to 0–31 positions without wraparound; stored values persist for 100 years with 100,000 write cycles. The device supports ratiometric operation with terminal voltages from VSS to VCC, and exhibits ±300 ppm/°C total resistance temperature coefficient and −120 dBV noise at 1 kHz.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (Pb-free), JEDEC MS-012-AA compliant, M8.15 footprint (4.80 mm × 3.80 mm × 1.27 mm height).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-10 and MCP41010-I/P, the X9315WSIZ-2.7T1 uniquely balances low-pin-count 3-wire control, guaranteed power-up recall, industrial temperature rating, and proven long-term reliability - making it optimal for cost-sensitive, maintenance-free analog trimming where deterministic startup behavior is mandatory.

Availability

X9315WSIZ-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical instrument gain setting, programmable power supply feedback, and audio signal level control requiring stable component supply and long-term obsolescence management.

Supply support for X9315WSIZ-2.7T1 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 industrial, communications, and computing markets, emphasizing reliability, precision, and low-power operation.

The X9315WSIZ-2.7T1 belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) family, engineered specifically to replace electromechanical potentiometers in analog trimming applications demanding nonvolatile storage, wide temperature operation, and robust digital control.

FAQ

What is the supply voltage range for the X9315WSIZ-2.7T1?

The X9315WSIZ-2.7T1 operates from 2.7 V to 5.5 V, supporting both 3.3 V and 5 V systems without external regulators. This range is explicitly defined in the "Recommended Operating Conditions" section of the FN8179 datasheet and validated across the −40°C to +85°C temperature range. The "-2.7" suffix denotes this extended low-voltage capability, distinguishing it from the 5 V-only X9315 variants.

Does the X9315WSIZ-2.7T1 retain its wiper position after power cycling?

Yes, the X9315WSIZ-2.7T1 stores the wiper position in nonvolatile memory and automatically recalls it upon power-up. This behavior is guaranteed by design: the last valid wiper value written before power-down remains intact for up to 100 years and survives 100,000 store cycles. No host intervention is required - the X9315WSIZ-2.7T1 resumes operation at the previously stored tap position immediately after V_CC stabilizes.

What package type and lead count does the X9315WSIZ-2.7T1 use?

The X9315WSIZ-2.7T1 uses an 8-lead narrow-body SOIC package (JEDEC MS-012-AA), designated M8.15 in Intersil documentation. It is Pb-free and RoHS-compliant, with dimensions 4.80 mm × 3.80 mm × 1.27 mm and 1.27 mm lead pitch. This matches the package shown in the "Ordering Information" table for part numbers ending in "WSIZ" and "WSIZT1", confirming physical and thermal compatibility with standard SOIC-8 footprints.

How many wiper positions does the X9315WSIZ-2.7T1 support?

The X9315WSIZ-2.7T1 supports exactly 32 discrete wiper positions (0 through 31), corresponding to a 31-element resistor ladder. This is confirmed by the device's 5-bit counter architecture, block diagram, and "32 wiper tap points" feature listing in the datasheet. Each position represents one node between adjacent resistors or at either end of the array - enabling precise 3.125% incremental adjustment of resistance ratio.

Is the X9315WSIZ-2.7T1 compatible with 3.3 V microcontrollers?

Yes, the X9315WSIZ-2.7T1 is fully compatible with 3.3 V microcontrollers. Its logic inputs (CS, U/D, INC) accept VIH ≥ 0.7 × V_CC and VIL ≤ 0.1 × V_CC, meaning at V_CC = 3.3 V, VIH ≥ 2.31 V and VIL ≤ 0.33 V - well within standard 3.3 V CMOS output levels. Input leakage current is ±10 µA, and input capacitance is 10 pF, ensuring minimal loading on GPIO pins driving the X9315WSIZ-2.7T1 interface.