Renesas X9015UM8ZT1

Overview

X9015UM8ZT1 from Intersil is a volatile, digitally controlled potentiometer with 32-tap resolution, 10kΩ end-to-end resistance, and 3-wire up/down serial interface. It operates from 2.7V to 5V, draws ≤50µA active current, and powers up at Tap #15-used for precision analog trimming in voltage dividers, gain control, and offset adjustment circuits.

For engineers reviewing the X9015UM8ZT1 datasheet, X9015UM8ZT1 pinout, X9015UM8ZT1 application, or X9015UM8ZT1 equivalent, key selection criteria include wiper resistance (200–400Ω at 5V), absolute linearity (±1 MI), standby current (≤1µA), MSOP-8 package compatibility, and volatile tap retention behavior.

Technical Context

The X9015UM8ZT1 implements a 5-bit up/down counter driving a 31-resistor string via make-before-break electronic switches. Wiper position is updated on falling edges of the INC input, with direction controlled by the U/D logic level while CS is low.

It features volatile memory-no EEPROM storage-so tap position resets to #15 at power-up. The device supports ratiometric operation with ±20 ppm/°C ratiometric temperature coefficient and maintains stable performance across 0°C to +70°C commercial temperature range in its MSOP-8 package.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Mo-187-AA compliant), 3.0mm × 4.9mm body, 0.65mm pitch, RoHS-compliant matte tin termination.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP41010-I/P, the X9015UM8ZT1 delivers lowest standby current (1µA), simplest 3-wire control, and smallest MSOP-8 footprint-making it optimal for space-constrained, battery-sensitive trimming where volatile operation is acceptable.

Availability

X9015UM8ZT1 is available at Aetrix Electronics and suitable for audio signal conditioning, sensor offset calibration, transimpedance gain control, and reference voltage scaling requiring stable component supply and RoHS-compliant packaging.

Supply support for X9015UM8ZT1 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 X9015UM8ZT1 belongs to Intersil's XDCP™ (Xicor Digitally Controlled Potentiometer) family-designed specifically for replacing mechanical pots in analog signal path trimming where low noise, predictable linearity, and minimal GPIO overhead are critical.

FAQ

What is the default wiper position of the X9015UM8ZT1 at power-up?

The X9015UM8ZT1 powers up with the wiper at Tap #15-its mid-scale position-ensuring repeatable, known initial resistance division. This behavior is hardwired and occurs regardless of prior state, since the device uses volatile memory with no nonvolatile storage. The X9015UM8ZT1 does not retain tap position across power cycles, making initialization predictable but requiring host firmware to reprogram if a specific start point is needed.

Does the X9015UM8ZT1 support I²C or SPI communication protocols?

No, the X9015UM8ZT1 uses a dedicated 3-wire up/down serial interface (CS, INC, U/D) and does not support I²C, SPI, or any standardized bus protocol. Communication is asynchronous and edge-triggered: wiper movement occurs on falling edges of INC, with direction determined by the U/D pin state. This eliminates protocol overhead and timing constraints associated with clocked buses, simplifying integration in resource-limited microcontrollers. The X9015UM8ZT1 requires only three GPIO pins and no address decoding or data framing.

What is the maximum wiper current rating for the X9015UM8ZT1?

The X9015UM8ZT1 specifies a maximum wiper current (IW) of ±3.75mA under all operating conditions. Exceeding this limit risks irreversible damage to the internal transfer gates and resistor string. This rating applies across the full 2.7V–5.5V supply range and 0°C to +70°C temperature range. When using the X9015UM8ZT1 in current-sensing or two-terminal variable resistor configurations, ensure load impedance keeps wiper current within this bound-e.g., ≥1.33kΩ for 5V full-scale swing. Derating is recommended for continuous operation near limits.

How does the "make-before-break" switching affect circuit behavior during tap changes?

The X9015UM8ZT1 employs make-before-break switching so that adjacent taps are briefly shorted during wiper transitions-preventing open-circuit glitches that could destabilize op-amp feedback loops or cause transient voltage spikes. This behavior ensures monotonic resistance change and avoids momentary disconnection in critical bias paths. However, moving multiple taps rapidly can temporarily reduce effective RTOTAL due to parallel conduction paths, which may impact precision in high-accuracy divider applications. For best results with the X9015UM8ZT1, allow ≥5µs between INC edges when stepping more than one tap.

Is the X9015UM8ZT1 pin-compatible with other members of the X9015 family?

Yes, the X9015UM8ZT1 shares identical pinout and electrical interface with all X9015 variants in MSOP-8 (e.g., X9015UM8IZ-2.7) and SOIC-8 packages (e.g., X9015US8ZT1), including RH/VH, RL/VL, RW/VW, VCC, VSS, CS, INC, and U/D assignments. Differences lie solely in total resistance value (10kΩ vs. 50kΩ), supply voltage range (5V vs. 2.7–5.5V), and temperature grade (0°C–70°C vs. –40°C–85°C). Thus, the X9015UM8ZT1 can be substituted within the same package footprint when those parametric requirements align-no PCB redesign is needed.