Renesas X9015US8-2.7T1

Overview

X9015US8-2.7T1 from Intersil is a volatile, digitally controlled potentiometer (XDCP™) with 32-tap resolution, 10kΩ end-to-end resistance, and 2.7V–5.5V supply operation. It functions as a solid-state variable resistor in analog trimming circuits, featuring three-wire up/down serial interface, 50µA max active current, and wiper position reset to Tap #15 at power-up.

For engineers reviewing the X9015US8-2.7T1 datasheet, X9015US8-2.7T1 pinout, X9015US8-2.7T1 application, or X9015US8-2.7T1 equivalent, key selection criteria include its volatile memory architecture, low-power standby mode (1µA), make-before-break wiper switching, ±1 MI absolute linearity, and SOIC-8 package compatibility with industrial temperature range (0°C to +70°C).

Technical Context

The X9015US8-2.7T1 implements a 5-bit up/down counter driving a 31-resistor ladder array, with tap selection determined by CS, U/D, and edge-triggered INC inputs. Its wiper terminal (RW/VW) connects to one of 32 nodes via electronic transfer gates operating in make-before-break mode.

Operation requires VCC ≥ VH, VL, VW; no power sequencing constraints apply. The device lacks nonvolatile storage-wiper position resets to Tap #15 on each power cycle-and supports only volatile digital control without EEPROM or I²C interface.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (JEDEC MS-012-AA compliant), RoHS-compliant matte tin finish, M8.15 outline drawing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP41010-I/P, the X9015US8-2.7T1 offers lowest active and standby current, simplest GPIO-based control, and deterministic power-up behavior (Tap #15), making it optimal for cost-sensitive, low-power, and mechanically-replacement applications where nonvolatility is unnecessary.

Availability

X9015US8-2.7T1 is available at Aetrix Electronics and suitable for audio volume control, laser diode bias adjustment, power supply feedback divider, sensor signal conditioning, and analog calibration circuits requiring stable component supply and RoHS-compliant packaging.

Supply support for X9015US8-2.7T1 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 company, now part of Renesas Electronics, with expertise in high-reliability industrial and infrastructure solutions.

The X9015 product line delivers volatile digital potentiometers optimized for analog trimming in space-constrained, low-power systems where simplicity, repeatability, and mechanical replacement are primary design goals.

FAQ

What is the power-up wiper position for the X9015US8-2.7T1?

The X9015US8-2.7T1 initializes its wiper to Tap #15 (midpoint) on every power-up cycle. This behavior is inherent to its volatile architecture-no stored value persists across power cycles. The wiper remains at Tap #15 until actively moved via the INC and U/D pins. This deterministic reset simplifies system initialization and ensures repeatable startup conditions in applications like power supply calibration or sensor offset trimming where known default states are required.

Does the X9015US8-2.7T1 support nonvolatile memory or retain wiper position after power loss?

No, the X9015US8-2.7T1 does not include nonvolatile memory and cannot retain wiper position after power loss. It is explicitly designed as a volatile digital potentiometer. Upon power-down, all wiper state is lost, and the device resets to Tap #15 at the next power-up. This distinguishes it from alternatives like the AD5170BRMZ-10, which uses EEPROM to store the last position. The X9015US8-2.7T1's volatility reduces cost, complexity, and write-cycle limitations, making it ideal for applications where firmware manages position or deterministic reset is advantageous.

What is the maximum allowable voltage difference between VH and VL terminals on the X9015US8-2.7T1?

The maximum allowable voltage difference (ΔV = |VH – VL|) across the RH/VH and RL/VL terminals of the X9015US8-2.7T1 is 5V. This limit applies regardless of VCC level and is independent of the supply voltage range (2.7V–5.5V). Exceeding this differential risks damage to the internal resistor string or transfer gates. Designers must ensure that the applied voltage across the potentiometer terminals stays within this 5V ceiling, especially in high-gain amplifier feedback or precision reference circuits where unexpected transients could violate this specification.

How does the make-before-break wiper switching affect circuit performance in the X9015US8-2.7T1?

The make-before-break switching in the X9015US8-2.7T1 ensures that the wiper connects to the new tap before disconnecting from the previous one, preventing momentary open-circuit conditions during tap transitions. This eliminates voltage glitches and current interruptions in sensitive analog paths-such as op-amp feedback loops or sensor bias networks-where even nanosecond discontinuities could cause instability or transient errors. The effect is observable as a temporary reduction in effective RTOTAL during multi-tap moves (tIW ≤ 5µs), but guarantees uninterrupted signal flow critical for reliable operation in real-time analog control systems.

Can the X9015US8-2.7T1 operate reliably at 2.7V supply while maintaining full 32-tap functionality?

Yes, the X9015US8-2.7T1 is fully specified and guaranteed to operate across its entire 32-tap range at VCC = 2.7V. The "-2.7" suffix denotes qualification down to 2.7V, and datasheet parameters-including active current (50µA max), wiper resistance (400–1000Ω), and timing (tCYC = 4µs min)-are validated at this minimum supply. No functional degradation or reduced resolution occurs at 2.7V; all electrical characteristics remain within published limits, enabling robust use in 3.3V and battery-powered systems where brown-out conditions may occur.