Renesas ISL95311WIU10Z-TK

Overview

ISL95311WIU10Z-TK from Intersil is a digitally controlled potentiometer (XDCP™) with I²C interface, 128-tap resolution, 10kΩ total resistance, 0V to +13.2V terminal voltage range, and nonvolatile wiper position storage. It functions as a three-terminal potentiometer or two-terminal variable resistor in precision analog adjustment circuits.

For engineers reviewing the ISL95311WIU10Z-TK datasheet, ISL95311WIU10Z-TK pinout, ISL95311WIU10Z-TK application, or ISL95311WIU10Z-TK equivalent, key selection considerations include I²C address configurability (A0/A1), V+ bias voltage requirement (8.0–13.2V), wiper response time (1µs), nonvolatile recall behavior, and MSOP-10 package compatibility with space-constrained PCB layouts.

Technical Context

The ISL95311WIU10Z-TK implements a 127-element resistor array with CMOS "make-before-break" wiper switching, controlled by a 7-bit volatile Wiper Register (WR) and backed by a nonvolatile Initial Value Register (IVR). Its I²C interface supports standard-mode (400kHz) operation with slave address set via A0/A1 pins, enabling up to four devices on one bus.

Power sequencing is critical: VCC must be applied before or simultaneously with V+, and V+ should turn off before or with VCC to prevent undefined wiper states. The device recalls IVR contents to WR at power-up after VCC exceeds 1.5V, with internal recall completed within 3ms.

Key Specifications

Pinout & Package

ISL95311WIU10Z-TK is housed in a Pb-free, RoHS-compliant 10-lead MSOP package (M10.118 footprint), optimized for compact industrial and automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP45HV51-103E/MS, the ISL95311WIU10Z-TK uniquely supports dual-rail operation (separate V+ up to 13.2V and VCC 2.7–5.5V), enabling high-voltage analog signal conditioning without level-shifting, while maintaining low 70Ω wiper resistance and guaranteed make-before-break switching.

Availability

ISL95311WIU10Z-TK is available at Aetrix Electronics and suitable for LCD contrast control, industrial sensor bias adjustment, automotive cabin controller tuning, and medical device parameter trimming requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ISL95311WIU10Z-TK 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 expertise in high-reliability industrial and automotive solutions.

The ISL95311WIU10Z-TK belongs to Intersil's XDCP™ (eXternally Digital Controlled Potentiometer) product line, designed specifically for replacing mechanical potentiometers in harsh-environment analog trimming applications where programmability, nonvolatility, and high-voltage operation are essential.

FAQ

What is the maximum terminal voltage supported by the ISL95311WIU10Z-TK?

The ISL95311WIU10Z-TK supports a terminal voltage range of 0V to +13.2V on RH, RL, and RW pins relative to GND. This allows direct use in high-side biasing applications up to 13.2V without external level-shifting circuitry. Exceeding +13.2V violates absolute maximum ratings and may cause permanent damage to the ISL95311WIU10Z-TK.

How does the ISL95311WIU10Z-TK handle power-up wiper positioning?

At power-up, the ISL95311WIU10Z-TK recalls the value stored in its nonvolatile Initial Value Register (IVR) and loads it into the volatile Wiper Register (WR), setting the wiper position within 3ms after VCC exceeds 1.5V. The device ships pre-programmed with 40h (64 decimal) in the IVR, centering the wiper by default unless reprogrammed.

Can the ISL95311WIU10Z-TK operate with only VCC applied, without V+?

No. The ISL95311WIU10Z-TK requires both VCC (2.7–5.5V) and V+ (8.0–13.2V) to function correctly. V+ powers the resistor array and wiper switches; applying only VCC leaves the DCP section unpowered and nonfunctional. VCC must be applied before or simultaneously with V+ to ensure reliable wiper recall and avoid undefined states in the ISL95311WIU10Z-TK.

What is the purpose of the A0 and A1 pins on the ISL95311WIU10Z-TK?

The A0 and A1 pins configure the two least-significant bits of the ISL95311WIU10Z-TK's 7-bit I²C slave address, enabling up to four devices on the same I²C bus. They are static hardware address inputs - not programmable registers - and must be hardwired to GND or VCC during PCB layout to assign unique addresses. No external pull-ups or pull-downs beyond those required for logic levels are needed.

Does the ISL95311WIU10Z-TK support write-protection for its nonvolatile memory?

The ISL95311WIU10Z-TK does not include hardware write-protection bits or lock registers. Nonvolatile writes occur automatically when writing to address 00h with the Access Control Register (ACR) set to 00h (default), followed by a STOP condition. Protection relies on software-level control: avoid issuing STOP after volatile-only writes, and restrict access to ACR and IVR writes in firmware to authorized calibration routines only.