Renesas X9511WST2

Overview

X9511WST2 from Intersil is a push-button controlled digital potentiometer (XDCP™) with 32 linear tap positions, 10kΩ end-to-end resistance, ±5V terminal voltage range, and nonvolatile wiper position storage. It functions as an electronically adjustable resistor for analog signal conditioning in embedded control systems requiring manual calibration without microcontroller intervention.

For engineers reviewing the X9511WST2 datasheet, X9511WST2 pinout, X9511WST2 application, or X9511WST2 equivalent, this device supports manual resistance trimming via two debounced push-button inputs (PU/PD), offers slow/fast scan modes, AUTOSTORE® and manual store options, and retains wiper position for 100 years in EEPROM - critical for power-cycle-critical industrial and automotive subsystems.

Technical Context

The X9511WST2 integrates a 5-bit up/down counter, 31-element temperature-compensated resistor array, and 5-bit EEPROM memory. Wiper position is decoded from the counter output to select one of 32 tap points, with internal debounce circuitry ensuring stable transitions (>40ms minimum button hold).

It operates in two store modes: AUTOSTORE enabled when ASE is held low (automatic save on VCC drop below 4V), or manual store via ASE pulse (LOW-to-HIGH transition). The device supports ±1mA wiper current, 323Ω per tap resolution (for 10kΩ version), and maintains ratiometric temperature coefficient of ±20 ppm over -40°C to +85°C.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (MDP0027), RoHS-compliant, Pb-free plus anneal finish, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP4017T-103I/OT, the X9511WST2 uniquely delivers push-button autonomy, ±5V bipolar operation, and guaranteed 100-year EEPROM retention - making it the only option for maintenance-free, human-accessible analog trimming in harsh or remote environments.

Availability

X9511WST2 is available at Aetrix Electronics and suitable for industrial power supply calibration, medical front-end biasing, audio equipment trimming, and sensor offset adjustment requiring stable component supply and long-term calibration integrity.

Supply support for X9511WST2 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 (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for industrial, computing, and communications markets, with ISO 9001-certified manufacturing.

The X9511WST2 belongs to Intersil's XDCP™ (eXternally Controlled Digital Potentiometer) family, engineered specifically for push-button-based analog trimming in systems lacking microcontrollers or requiring fail-safe, nonvolatile calibration.

FAQ

What is the function of the ASE pin on the X9511WST2?

The ASE (AUTOSTORE Enable) pin on the X9511WST2 configures how wiper position data is saved to nonvolatile memory. When held low, it enables AUTOSTORE® mode - automatically storing the current wiper position during VCC power-down. When held high, it enables manual store mode: pulling ASE low-to-high triggers a single EEPROM write. This dual-mode flexibility allows the X9511WST2 to support both hands-off power-cycle persistence and user-initiated calibration lock-in without firmware dependency.

Does the X9511WST2 require an external microcontroller to operate?

No, the X9511WST2 operates autonomously without any microcontroller. Its PU and PD pins accept direct push-button connections (active-low, internally pulled up), and its ASE pin selects between automatic or manual EEPROM store - all logic and timing handled on-chip. The X9511WST2 is designed specifically for standalone analog trimming applications where MCU resources are unavailable, constrained, or undesirable for safety or simplicity reasons.

What is the maximum allowable voltage across VH and VL terminals of the X9511WST2?

The X9511WST2 specifies a maximum differential voltage ΔV = |VH − VL| of 10V for the X9511W variant. This aligns with its ±5V terminal voltage rating relative to VSS. Exceeding 10V risks exceeding absolute maximum ratings and may damage the internal resistor array or transfer gates. The device is not rated for higher-voltage applications such as motor control or AC line sensing - it is strictly intended for low-voltage analog signal conditioning within its specified ±5V window.

How does the X9511WST2 handle wiper movement during continuous button press?

The X9511WST2 implements adaptive scan timing: initial button press enters slow scan mode (100–375ms per tap), then after 1 second of continuous press, it switches to fast scan mode (25–90ms per tap). This behavior is implemented entirely in hardware with no external timing components. The X9511WST2 also prevents wraparound - wiper stops at tap 0 or tap 31 and does not cycle - ensuring predictable, bounded adjustment range during both single and sustained actuation.

Is the X9511WST2 RoHS compliant and what packaging does it use?

Yes, the X9511WST2 is RoHS compliant and uses an 8-lead SOIC package (MDP0027) with Pb-free plus anneal construction - featuring 100% matte tin plating and molding compounds qualified for both SnPb and lead-free reflow processes. The "T2" suffix in X9511WST2 explicitly denotes tape-and-reel packaging for automated SMT assembly, and the device meets IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for standard reflow profiles.