Renesas X9015US8-2.7

Overview

X9015US8-2.7 from Intersil is a volatile, digitally controlled potentiometer with 32-tap resolution, 10kΩ end-to-end resistance, and 2.7V–5.5V supply operation. It implements a three-wire up/down serial interface (CS/INC/U/D), delivers ≤50µA active current, and powers up to Tap #15 - used for precision analog trimming in voltage reference and op-amp gain-setting circuits.

For engineers reviewing the X9015US8-2.7 datasheet, X9015US8-2.7 pinout, X9015US8-2.7 application, or X9015US8-2.7 equivalent, key selection criteria include wiper resistance (≤400Ω at 2.7V), absolute linearity (±1 MI), standby current (≤1µA), and SOIC-8 package compatibility with industrial temperature range (0°C to +70°C).

Technical Context

The X9015US8-2.7 integrates a 5-bit up/down counter, decoder, and 31-resistor string array to position the RW/VW wiper across discrete taps. Its "make-before-break" switching ensures continuity during tap transitions, while wiper movement is edge-triggered on INC and direction-controlled by U/D logic level.

Operation requires CS low to enable control; returning CS high while INC is high places the device in standby mode. Power-up resets wiper to Tap #15, and no nonvolatile storage is present - all settings are lost on power cycle.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (JEDEC MS-012-AA, POD M8.15), RoHS-compliant, 1.27mm pitch, body size 4.9mm × 3.9mm × 1.75mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9015US8-2.7, AD5170BRMZ-10 adds nonvolatility and I²C but removes make-before-break assurance, while MCP41010-I/P offers 257-tap resolution at 20× higher active current and looser linearity - making X9015US8-2.7 optimal for low-power, glitch-free analog trimming where volatility is acceptable.

Availability

X9015US8-2.7 is available at Aetrix Electronics and suitable for voltage reference trimming, op-amp gain configuration, audio level control, and DC-DC feedback adjustment requiring stable component supply across industrial temperature range (0°C to +70°C).

Supply support for X9015US8-2.7 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 focus on high-reliability industrial and infrastructure solutions.

The X9015 product line delivers volatile digital potentiometers optimized for low-noise, low-power analog trimming in space-constrained systems where EEPROM wear-out or SPI/I²C overhead is undesirable.

FAQ

What is the power-up wiper position for the X9015US8-2.7?

The X9015US8-2.7 powers up with its wiper at Tap #15 - the midpoint of its 32-tap resistor string. This deterministic reset behavior ensures predictable initial analog output without requiring host initialization. Since the device is volatile, this position is restored on every power cycle regardless of prior state. The X9015US8-2.7 does not retain wiper position after power loss.

Does the X9015US8-2.7 support true 3.3V operation?

Yes, the X9015US8-2.7 fully supports 3.3V operation: its specified VCC range is 2.7V–5.5V, and all electrical parameters - including 50µA max ICC, 1µA max standby current, and 400Ω max wiper resistance - are guaranteed across this range. Input thresholds (VIH = 0.7×VCC, VIL = 0.1×VCC) ensure reliable GPIO-level compatibility with standard 3.3V microcontrollers without external level shifters.

How does the "make-before-break" feature benefit circuits using the X9015US8-2.7?

The "make-before-break" switching in the X9015US8-2.7 ensures that the wiper connects to the next tap before disconnecting from the current one, preventing momentary open-circuit conditions. This eliminates output glitches in sensitive analog paths - such as op-amp feedback networks or voltage reference dividers - where interruption could cause latch-up, overshoot, or control loop instability. The X9015US8-2.7 guarantees this behavior across all tap transitions.

Can the X9015US8-2.7 be used as a two-terminal variable resistor?

Yes, the X9015US8-2.7 can be configured as a two-terminal variable resistor by connecting either RH/VH or RL/VL to VW/RW and leaving the other fixed terminal unused or grounded. In this mode, resistance between the joined terminals varies from near-zero (Tap #0 or #31) to RTOTAL (10kΩ). Designers must observe wiper current limits (±3.75mA) and derate power accordingly - the X9015US8-2.7 supports 10mW total dissipation for RTOTAL ≤1kΩ, but 10kΩ operation requires lower voltage/current.

What is the absolute linearity specification for the X9015US8-2.7 and how is it defined?

The X9015US8-2.7 specifies absolute linearity as ±1 MI (Minimum Increment), where MI = RTOTAL/31 ≈ 322.6Ω for a 10kΩ device. This means the actual wiper voltage at any tap deviates from the ideal linear value by no more than ±1 MI - translating to ±3.2% of full-scale output voltage. This parameter is measured at TA = +25°C and is critical for applications like precision reference trimming where end-point accuracy directly impacts system gain or offset error. The X9015US8-2.7 achieves this via laser-trimmed resistor matching in its monolithic array.