Renesas X9315WMZT1

Overview

X9315WMZT1 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 at 5V ±10%, delivers 10kΩ end-to-end resistance, and functions as a three-terminal voltage divider or two-terminal variable resistor in analog signal conditioning circuits.

For engineers reviewing the X9315WMZT1 datasheet, X9315WMZT1 pinout, X9315WMZT1 application, or X9315WMZT1 equivalent, key selection criteria include its 5V-only supply compatibility, MSOP-8 Pb-free RoHS-compliant package, 0°C to +70°C commercial temperature range, and guaranteed 100-year data retention in nonvolatile memory.

Technical Context

The X9315WMZT1 uses a 5-bit up/down counter driving a decoder to select one of 32 wiper positions across a segmented resistor ladder. Wiper movement is controlled via edge-triggered INC input with direction set by U/D logic level, and CS enables both operation and nonvolatile store on rising edge with INC high.

Its solid-state architecture provides temperature-compensated resistance (±300 ppm/°C), low noise (–120 dBV @ 1 kHz), and make-before-break switching during wiper transitions. The device enters standby mode (<5 µA) when deselected and recalls last stored position on power-up without external initialization.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free), JEDEC MO-187AA compliant, dimensions 3.0 mm × 3.0 mm × 0.85 mm (M8.118 drawing).

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 X9315WMZT1 offers guaranteed power-on wiper recall without firmware overhead, simpler 3-wire GPIO control, and tighter resistance tolerance-making it optimal for cost-sensitive, single-pot, calibration-critical applications where I²C/SPI resources are constrained.

Availability

X9315WMZT1 is available at Aetrix Electronics and suitable for audio volume control, power supply feedback trim, and sensor signal conditioning requiring stable component supply and long-term calibration integrity.

Supply support for X9315WMZT1 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 X9315 product line delivers solid-state digitally controlled potentiometers optimized for analog trimming tasks where mechanical reliability, nonvolatile setting retention, and low-noise performance are essential in commercial-grade systems.

FAQ

What is the supply voltage requirement for the X9315WMZT1?

The X9315WMZT1 requires a 5 V ±10% supply (4.5 V to 5.5 V). It is not compatible with the 2.7–5.5 V variants such as X9315WMZ-2.7T1. Operation outside this range may cause functional failure or reduced reliability. The datasheet specifies no operation below 4.5 V, and VCC must always be ≥ VH, VL, and VW.

Does the X9315WMZT1 retain its wiper position after power loss?

Yes, the X9315WMZT1 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This occurs without host intervention and is guaranteed for 100 years. The store operation is triggered by a rising edge on CS while INC is held HIGH, and the recalled value sets the initial wiper position at every power cycle.

What package type and footprint does the X9315WMZT1 use?

The X9315WMZT1 uses an 8-lead MSOP (Mini Small Outline Plastic) package, Pb-free and RoHS-compliant, per JEDEC MO-187AA (drawing M8.118). Its dimensions are 3.0 mm × 3.0 mm × 0.85 mm, with 0.65 mm lead pitch. It is not pin-compatible with SOIC-8 or PDIP-8 variants of the X9315 family.

Can the X9315WMZT1 be used as a two-terminal variable resistor?

Yes, the X9315WMZT1 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 variable element. This configuration is explicitly supported in the datasheet and commonly used in voltage regulator feedback networks and current-limiting applications.

What is the maximum wiper current rating for the X9315WMZT1?

The X9315WMZT1 has a maximum wiper current rating of ±3.75 mA under recommended operating conditions. Exceeding this limit risks irreversible damage to the internal switching elements. The wiper resistance is 200 Ω typical at 5 V, so voltage drop across RW/VW must remain within safe bounds to avoid exceeding current or power (10 mW max) limits.