Renesas X9015UM8IZ-2.7T1

Overview

X9015UM8IZ-2.7T1 from Intersil is a volatile, digitally controlled potentiometer with 32-tap resolution, 10kΩ end-to-end resistance, and operation from 2.7V to 5.5V supply. It implements a 3-wire up/down serial interface (CS, INC, U/D), features wiper resistance of 400–1000Ω at 2.7V, and powers up to Tap #15. It serves as a solid-state replacement for mechanical trimmers in analog voltage divider and current-setting circuits.

For engineers reviewing the X9015UM8IZ-2.7T1 datasheet, X9015UM8IZ-2.7T1 pinout, X9015UM8IZ-2.7T1 application, or X9015UM8IZ-2.7T1 equivalent, key selection criteria include its industrial temperature range (–40°C to +85°C), MSOP-8 package, low standby current (1µA max), ±1 MI absolute linearity, and compatibility with 2.7V logic systems requiring non-volatile initialization behavior.

Technical Context

The X9015UM8IZ-2.7T1 integrates a 5-bit up/down counter, decoder, and 31-resistor array to position the wiper terminal (RW/VW) across discrete taps. Its control logic responds to negative-edge-triggered INC pulses while direction is latched via U/D state during CS activation.

It operates in make-before-break switching mode during tap transitions, enabling glitch-free analog output updates. Wiper position is volatile-lost on power-down-and resets to Tap #15 at power-up; no EEPROM or non-volatile storage is present.

Key Specifications

Pinout & Package

Package: 8-pin MSOP (M8.118), 3.0mm × 3.0mm 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 X9015UM8IZ-2.7T1, AD5170BRMZ-10 offers higher resolution and non-volatility at the cost of added protocol complexity, while MCP4017T-103E/MS matches the interface simplicity but adds EEPROM retention-making it suitable for recalibration-sensitive applications where startup repeatability is secondary to setting persistence.

Availability

X9015UM8IZ-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, portable audio biasing, and programmable power supply feedback requiring stable component supply across extended temperature ranges and low-voltage operation.

Supply support for X9015UM8IZ-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 is a precision analog and power management semiconductor provider, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.

The X9015 product line was designed specifically for replacing mechanical potentiometers in analog trimming applications where digital control, long-term stability, and compact packaging are essential-targeting industrial controls, test instrumentation, and embedded system calibration.

FAQ

What is the power-up behavior of the X9015UM8IZ-2.7T1?

The X9015UM8IZ-2.7T1 powers up with the wiper positioned at Tap #15, regardless of its prior state. This deterministic reset ensures repeatable analog output at system startup and eliminates dependency on previous settings. Because the device is volatile, no EEPROM or non-volatile memory is involved-the reset is hardwired into the internal logic and occurs every time VCC crosses the functional threshold. This behavior is confirmed in the FN8157 datasheet Section "Principles Of Operation" and applies identically to X9015UM8IZ-2.7T1.

Does the X9015UM8IZ-2.7T1 support true 2.7V operation across all specifications?

Yes, the X9015UM8IZ-2.7T1 is fully specified for 2.7V to 5.5V operation, including active current (50µA max), standby current (1µA max), wiper resistance (400–1000Ω), and timing parameters (tCYC ≥ 4µs). The "-2.7" suffix explicitly denotes qualification down to 2.7V, validated across the full industrial temperature range (–40°C to +85°C). Unlike standard X9015 variants rated only for 5V ±10%, this version maintains all electrical performance at the lower rail-critical for direct integration into 2.7V systems without voltage translation.

Can the X9015UM8IZ-2.7T1 be used in a two-terminal variable resistor configuration?

Yes, the X9015UM8IZ-2.7T1 supports two-terminal operation by connecting either RH/VH or RL/VL to the wiper RW/VW, effectively creating a variable resistor between the remaining fixed terminal and the shorted pair. In this mode, total resistance varies from near-zero (at Tap #0 or #31) to RTOTAL (10kΩ). Designers must account for wiper resistance (400–1000Ω at 2.7V) in low-value applications, and ensure current stays within ±3.75mA limits. This configuration is documented in the "Basic Configurations" section of the FN8157 datasheet and is electrically valid for X9015UM8IZ-2.7T1.

What is the significance of "make-before-break" switching in the X9015UM8IZ-2.7T1?

"Make-before-break" means that during a tap transition, the new wiper connection is established before the old one is disconnected-preventing momentary open-circuit conditions. For the X9015UM8IZ-2.7T1, this avoids voltage glitches in op-amp feedback loops or unstable bias points in amplifier stages. While multiple taps may be briefly shorted (reducing effective RTOTAL transiently), the behavior ensures monotonic output movement and eliminates audible pops in audio paths or control jumps in sensor interfaces. This feature is inherent to the internal transfer gate architecture and applies to all X9015UM8IZ-2.7T1 tap changes.

Is the X9015UM8IZ-2.7T1 RoHS compliant and lead-free?

Yes, the X9015UM8IZ-2.7T1 is RoHS compliant and manufactured with Pb-free plus anneal process: 100% matte tin plate termination, Pb-free molding compound and die attach materials. This construction meets IPC/JEDEC J-STD-020 reflow requirements for both SnPb and Pb-free soldering processes. The "Z" in the part number explicitly denotes RoHS compliance per Intersil's ordering nomenclature, and the M8.118 package drawing confirms Pb-free finish. Full compliance documentation is available in Intersil's quality certifications portal.