Renesas X9015UM8IZ-2.7

Overview

X9015UM8IZ-2.7 from Intersil is a volatile, low-noise, digitally controlled potentiometer with 32 taps, 10kΩ end-to-end resistance, ±1 MI absolute linearity, and operation from 2.7V to 5.5V supply. It uses a 3-wire up/down serial interface (CS, INC, U/D), features 1µA standby current, and is housed in an 8-lead MSOP package rated for –40°C to +85°C industrial temperature range. It serves as a solid-state replacement for mechanical trimmers in precision analog voltage division.

For engineers reviewing the X9015UM8IZ-2.7 datasheet, X9015UM8IZ-2.7 pinout, X9015UM8IZ-2.7 application, or X9015UM8IZ-2.7 equivalent, key selection criteria include its volatile wiper position (power-up defaults to Tap #15), make-before-break switching behavior, 5 µs wiper settling time, and compatibility with low-power microcontroller GPIO control without external level-shifting.

Technical Context

The X9015UM8IZ-2.7 implements a 5-bit up/down counter driving a 31-resistor ladder array, where tap selection is determined solely by edge-triggered INC input and static U/D direction control. Its wiper terminal (RW/VW) exhibits 400–1000 Ω resistance at 2.7V, and transitions occur with tIW = 1–5 µs propagation delay from INC edge to VW change.

No internal nonvolatile storage exists - all wiper state is lost on power removal. The device enters standby mode when CS returns high while INC is high, reducing ICC to ≤1 µA. Operation requires VCC ≥ VH, VL, VW, with no power sequencing constraints beyond this voltage hierarchy.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), 3.0 mm × 3.0 mm body, 0.65 mm pitch, RoHS-compliant matte tin terminations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9015UM8IZ-2.7, AD5170BRMZ-10 adds nonvolatility and I²C simplicity but increases BOM count with pull-ups, while MCP41010-I/P offers more taps and same supply range but introduces greater wiper resistance uncertainty and slower response - both require PCB layout changes due to different packages and pinouts.

Availability

X9015UM8IZ-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, portable medical device trimming, and automotive-adjacent test equipment requiring stable component supply across extended temperature ranges.

Supply support for X9015UM8IZ-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, with legacy expertise in high-reliability industrial and infrastructure solutions.

The X9015 product line was designed specifically for replacing mechanical potentiometers in analog signal conditioning circuits where digital control, long-term stability, and vibration immunity are essential - not for general-purpose digital logic or power switching.

FAQ

What is the default wiper position of the X9015UM8IZ-2.7 at power-up?

The X9015UM8IZ-2.7 initializes its wiper to Tap #15 (midpoint) on every power-up cycle. This behavior is hardwired and cannot be altered via configuration. Since the device is volatile, no prior wiper state is retained after VCC removal, making Tap #15 the guaranteed starting point for all subsequent digital adjustments using the U/D and INC pins.

Does the X9015UM8IZ-2.7 support I²C or SPI communication protocols?

No, the X9015UM8IZ-2.7 does not support I²C or SPI. It uses a dedicated 3-wire up/down serial interface consisting of Chip Select (CS), Increment (INC), and Up/Down (U/D) signals. Communication is asynchronous and edge-triggered: each falling edge on INC advances the wiper one tap in the direction set by the static U/D logic level. No clock line, address byte, or data framing is involved.

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

Yes, the X9015UM8IZ-2.7 can be configured as a two-terminal variable resistor by connecting either RH/VH or RL/VL to the desired fixed potential and using RW/VW as the adjustable terminal, leaving the unused fixed terminal unconnected or tied to the same potential. This configuration maintains the full 32-tap resolution and linearity specs, though wiper resistance (400–1000 Ω at 2.7V) becomes part of the effective series resistance.

What is the maximum allowable voltage difference between RH/VH and RL/VL terminals for the X9015UM8IZ-2.7?

The maximum allowable voltage difference (ΔV = |VH – VL|) across RH/VH and RL/VL terminals is 5V, as specified in the Absolute Maximum Ratings table. Exceeding this differential risks permanent damage regardless of individual terminal voltages relative to VSS, provided VCC remains ≥ VH and VL. This limit applies independently of VCC value and is enforced by internal junction breakdown thresholds.

How does the "make-before-break" switching behavior affect circuit design when using the X9015UM8IZ-2.7?

The "make-before-break" switching ensures that multiple adjacent taps connect briefly to RW/VW during wiper movement, temporarily lowering effective resistance between RH/VH and RL/VL. This prevents open-circuit conditions but may cause momentary current surges in low-impedance loads. Designers must verify that transient RTOTAL reduction does not exceed safe power dissipation limits - especially critical in high-precision voltage references or current-sensing paths where even µs-scale shorts could disrupt regulation.