Renesas X9015UM8

Overview

X9015UM8 from Intersil is a volatile, digitally controlled potentiometer (XDCP™) with 32-tap resolution, 50 kΩ end-to-end resistance, and 3-wire up/down serial interface. It operates from 2.7V to 5.5V, draws ≤50 µA active current, and powers up at Tap #15 - used for precision analog trimming in low-power sensor signal conditioning circuits.

For engineers reviewing the X9015UM8 datasheet, X9015UM8 pinout, X9015UM8 application, or X9015UM8 equivalent, key selection criteria include its MSOP-8 package, wiper resistance (400–1000 Ω at 2.7V), ±1 MI absolute linearity, ratiometric temperature coefficient (±20 ppm/°C), and standby current of ≤1 µA.

Technical Context

The X9015UM8 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 asserted low.

Its volatile architecture means tap position is lost at power-down and resets to Tap #15 on power-up; no EEPROM or nonvolatile storage is present. The device supports two-terminal variable resistor and three-terminal voltage divider configurations, with RH/VH and RL/VL terminals fixed and RW/VW serving as the programmable wiper output.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), 3.0 mm × 3.0 mm footprint, 0.65 mm 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 X9015UM8, AD5175BRMZ-50 adds nonvolatility and I²C addressability at the cost of update latency and complexity, while MCP4018T-E/OT offers lower voltage operation and smaller footprint but sacrifices bidirectional terminal labeling and MSOP thermal performance.

Availability

X9015UM8 is available at Aetrix Electronics and suitable for precision analog trimming, sensor calibration, and programmable gain control requiring stable component supply across industrial temperature ranges (0°C to +70°C).

Supply support for X9015UM8 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 company, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.

The X9015 product line delivers volatile digital potentiometers optimized for low-noise, low-power analog trimming in sensor interfaces, instrumentation, and portable electronics - emphasizing simplicity, stability, and ease of MCU integration.

FAQ

What is the power-up wiper position for the X9015UM8?

The X9015UM8 powers up with the wiper at Tap #15, regardless of the last programmed position before power-down. This deterministic reset behavior is inherent to its volatile architecture and ensures repeatable startup conditions in systems like sensor calibration modules where known initial state is critical for self-test routines. The X9015UM8 does not retain wiper position across power cycles.

Does the X9015UM8 support both two-terminal and three-terminal configurations?

Yes, the X9015UM8 supports both configurations: as a three-terminal potentiometer (RH/VH–RW/VW–RL/VL) for voltage division, and as a two-terminal variable resistor (e.g., RH/VH–RW/VW or RW/VW–RL/VL) for current-setting or gain control. Its RH/VH and RL/VL terminals are functionally symmetric and directionally labeled based on U/D state - a design feature confirmed in the FN8157 datasheet Pin Descriptions section. This flexibility is fully supported in the X9015UM8.

What is the maximum allowable voltage difference between VH and VL terminals on the X9015UM8?

The maximum allowable voltage difference (ΔV = |VH – VL|) across the X9015UM8's fixed terminals is 5V, as specified in the Absolute Maximum Ratings table of the FN8157 datasheet. Exceeding this limit risks permanent damage. This constraint applies independently of VCC level and must be observed even when the device is unpowered. The X9015UM8's safe operating range is defined strictly by this 5V differential limit, not by VCC rail voltage alone.

How does the X9015UM8 handle rapid successive INC pulses?

The X9015UM8 processes each falling edge on the INC pin as a discrete wiper step, with minimum cycle time tCYC = 4 µs. During rapid stepping, its make-before-break switch architecture temporarily connects multiple taps to RW/VW for tIW (1–5 µs), causing momentary reduction in effective RTOTAL. This behavior is documented in the Principles of Operation section and is intrinsic to the X9015UM8's analog switch design - users must account for transient resistance deviations in time-critical signal paths.

Is the X9015UM8 RoHS compliant and lead-free?

Yes, the X9015UM8 is RoHS compliant and features Pb-free plus anneal construction, including 100% matte tin plate termination finish and RoHS-compliant molding compounds and die attach materials. This is explicitly stated in the Ordering Information table footnote and Package Outline Drawing notes of the FN8157 datasheet. The X9015UM8 meets IPC/JEDEC J-STD-020 reflow requirements for lead-free assembly and is compatible with both SnPb and Pb-free soldering processes.