Renesas X9015US8IZ-2.7

Overview

X9015US8IZ-2.7 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 three-wire up/down serial interface (CS, INC, U/D), features 50µA max active current and 1µA max standby current, and is used for precision analog trimming in industrial-grade instrumentation requiring -40°C to +85°C operation.

For engineers reviewing the X9015US8IZ-2.7 datasheet, X9015US8IZ-2.7 pinout, X9015US8IZ-2.7 application, or X9015US8IZ-2.7 equivalent, key selection criteria include its volatile wiper position (power-up defaults to Tap #15), make-before-break switching behavior, ±1 MI absolute linearity, 200–1000Ω wiper resistance depending on VCC, and SOIC-8 package compatibility with industrial temperature range.

Technical Context

The X9015US8IZ-2.7 integrates a 5-bit up/down counter, decoder, and 31-resistor string array to position the RW/VW wiper terminal across discrete taps. Its control logic responds to negative-edge-triggered INC pulses while U/D determines direction, and CS enables selection and low-power standby mode.

Operation is strictly volatile: no nonvolatile storage is present, and wiper state resets to Tap #15 at power-up. The device exhibits make-before-break switching during tap transitions, causing temporary reduction in effective RTOTAL when moving multiple positions - a critical timing consideration for precision voltage divider applications.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (JEDEC MS-012-AA, POD M8.15), RoHS-compliant, matte tin termination, 1.27mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9015US8IZ-2.7, AD5170BRMZ-10 provides nonvolatile memory but adds I²C complexity and different pinout, while MCP41HV51-103 supports higher voltage operation and SPI control but lacks the ultra-low 1µA standby current and deterministic power-up behavior of the X9015US8IZ-2.7.

Availability

X9015US8IZ-2.7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, programmable power supply feedback, and instrumentation calibration requiring stable component supply across extended temperature ranges.

Supply support for X9015US8IZ-2.7 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, delivering high-reliability solutions for industrial, infrastructure, and computing markets.

The X9015 product line was designed specifically for low-power, volatile digital trimming in space-constrained industrial systems where EEPROM endurance, write time, or interface complexity are unacceptable trade-offs.

FAQ

What is the default wiper position of the X9015US8IZ-2.7 at power-up?

The X9015US8IZ-2.7 initializes its wiper to Tap #15 (midpoint) each time VCC is applied. This behavior is inherent to its volatile architecture and occurs regardless of prior state. No external initialization sequence is required, making the X9015US8IZ-2.7 predictable for systems needing known startup conditions - a key advantage over nonvolatile DCPs that may retain arbitrary last-position states.

Does the X9015US8IZ-2.7 support nonvolatile wiper storage?

No, the X9015US8IZ-2.7 does not include EEPROM or flash memory. Its wiper position is volatile and lost upon power removal. The device relies solely on external control to re-establish the desired tap after each power cycle. This design eliminates write-cycle limitations and latency associated with nonvolatile storage, making the X9015US8IZ-2.7 ideal for applications requiring frequent, rapid adjustments without endurance concerns.

How does the make-before-break switching behavior affect circuit performance in the X9015US8IZ-2.7?

The X9015US8IZ-2.7 uses make-before-break switching during tap transitions, meaning multiple resistor nodes connect briefly to RW/VW. This can temporarily reduce effective RTOTAL by up to ~30% during multi-step moves, potentially causing transient loading errors in high-impedance circuits. Designers must account for this in timing-critical feedback paths - for example, by allowing tIW (1–5µs) settling time before sampling VW or avoiding rapid successive INC pulses in precision references.

What is the maximum wiper current rating for the X9015US8IZ-2.7 at 2.7V supply?

The X9015US8IZ-2.7 specifies a maximum wiper current (IW) of ±3.75mA across its full operating range, including at 2.7V. This limit applies regardless of VCC level and is defined by internal switch robustness. Exceeding ±3.75mA risks irreversible damage to the wiper transistor structure. For 10kΩ RTOTAL, this corresponds to a maximum allowable voltage differential of ~37.5V across RH/VH and RL/VL - though absolute ratings restrict ΔV to 5V, enforcing safe operation within linear region.

Can the X9015US8IZ-2.7 be used with a 3.3V microcontroller GPIO interface?

Yes, the X9015US8IZ-2.7 is fully compatible with 3.3V GPIOs. Its VIH threshold is VCC × 0.7 (min 1.89V at 2.7V VCC), and VIL is VCC × 0.1 (max 0.27V). A 3.3V MCU's HIGH output (~3.3V) exceeds VIH, and its LOW output (~0V) satisfies VIL across the full 2.7–5.5V VCC range. Input leakage remains ±10µA, posing negligible load - confirming direct interfacing without level-shifting for CS, INC, and U/D signals in the X9015US8IZ-2.7.