Renesas X9015UM8IZT1

Overview

X9015UM8IZT1 from Intersil is a volatile, low-noise, digitally controlled potentiometer with 32-tap resolution, 10kΩ end-to-end resistance, and MSOP-8 package. It implements a 3-wire up/down serial interface (CS, INC, U/D), operates from 2.7V to 5.5V, draws ≤50µA active current, and powers up at Tap #15 - used for precision analog trimming in sensor signal conditioning circuits.

For engineers reviewing the X9015UM8IZT1 datasheet, X9015UM8IZT1 pinout, X9015UM8IZT1 application, or X9015UM8IZT1 equivalent, key selection criteria include its industrial temperature range (–40°C to +85°C), wiper resistance (≤400Ω at 2.7V), absolute linearity (±1 MI), ratiometric tempco (±20 ppm/°C), and compatibility with mechanical potentiometer replacement in voltage divider and variable resistor configurations.

Technical Context

The X9015UM8IZT1 uses a 5-bit up/down counter driving a 31-resistor string array with make-before-break electronic switches. Wiper position is updated on falling edges of the INC input, direction controlled by the U/D logic level, and device activation gated by CS.

It features volatile memory (no EEPROM), so tap position resets to Tap #15 at power-up. The wiper terminal (RW/VW) exhibits ≤400Ω series resistance at 2.7V supply and supports ±3.75mA max wiper current, with noise performance of –120 dBV referenced to 1 kHz.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, 3.0mm × 3.0mm body, 0.65mm pitch, exposed pad optional.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP4017T-103E/MS, the X9015UM8IZT1 offers deterministic power-up behavior (Tap #15), tighter ratiometric tempco (±20 vs. ±50 ppm/°C), and integrated CS-driven standby - making it optimal for safety-critical or thermally demanding analog trimming where reset-on-power is desired.

Availability

X9015UM8IZT1 is available at Aetrix Electronics and suitable for sensor calibration, audio gain control, voltage reference tuning, and power supply feedback applications requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for X9015UM8IZT1 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 is a precision analog and power management semiconductor provider, now part of Renesas Electronics, with expertise in high-reliability industrial and infrastructure solutions.

The X9015UM8IZT1 belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in analog signal-path trimming applications where digital control, small footprint, and thermal stability are essential.

FAQ

What is the default wiper position of the X9015UM8IZT1 at power-up?

The X9015UM8IZT1 powers up with the wiper at Tap #15 - the midpoint of its 32-tap resistor string. This behavior is guaranteed across all units and temperature conditions, providing a known, repeatable starting point for analog circuit initialization. Because the device is volatile, this reset occurs on every power cycle, ensuring no residual setting from prior operation affects system startup.

Does the X9015UM8IZT1 retain its wiper position after power loss?

No, the X9015UM8IZT1 does not retain wiper position after power loss. It is a volatile digital potentiometer with no nonvolatile memory. Upon power restoration, the wiper always returns to Tap #15 regardless of its previous state. This characteristic is intentional and makes the X9015UM8IZT1 suitable for applications requiring guaranteed reset behavior, such as safety-critical bias networks or systems where unintended retained settings could cause malfunction.

What is the maximum wiper current rating for the X9015UM8IZT1?

The X9015UM8IZT1 supports a maximum wiper current of ±3.75mA under steady-state conditions. Exceeding this limit risks irreversible damage to the internal transfer gates. This rating applies across the full operating temperature range and supply voltage (2.7V–5.5V). For reliable operation, design wiper loads to stay within this bound - for example, ensure minimum load resistance is ≥1.33kΩ when using 5V full-scale swing.

Can the X9015UM8IZT1 be used in a two-terminal variable resistor configuration?

Yes, the X9015UM8IZT1 can be configured as a two-terminal variable resistor by connecting either RH/VH or RL/VL to the wiper RW/VW and using the remaining fixed terminal plus RW/VW as the two endpoints. In this mode, resistance varies from near-zero (at Tap #0 or #31) to RTOTAL (10kΩ). Ensure wiper current remains within ±3.75mA and observe voltage constraints: |VH – VL| ≤ 5V and VCC ≥ all terminal voltages.

How does the X9015UM8IZT1 handle rapid successive INC pulses?

The X9015UM8IZT1 requires a minimum INC cycle time (tCYC) of 4 µs between valid falling edges. Pulses faster than this may be missed or cause metastability in the internal 5-bit counter. Additionally, during multi-tap movement, the device uses make-before-break switching - temporarily shorting adjacent taps - which can reduce effective RTOTAL. For stable analog output, allow ≥5 µs settling (tIW) after each INC edge before sampling VW.