Renesas ISL95810UIU8

Overview

ISL95810UIU8 from Intersil is a single-channel, digitally controlled potentiometer (XDCP™) with I²C interface, 256-tap resolution (0.4%), 50 kΩ end-to-end resistance, and non-volatile wiper position storage. It operates from 2.7V to 5.5V, draws ≤5 µA standby current, and functions as a precision voltage divider or rheostat in analog signal conditioning circuits.

For engineers reviewing the ISL95810UIU8 datasheet, ISL95810UIU8 pinout, ISL95810UIU8 application, or ISL95810UIU8 equivalent, this page delivers verified electrical specs, package mapping, I²C timing compliance, wiper register behavior, and real-world use context for embedded calibration and trimming tasks.

Technical Context

The ISL95810UIU8 implements a monolithic CMOS resistor ladder with CMOS switch matrix, controlled via standard-mode (400 kHz) I²C interface. Its volatile Wiper Register (WR) and non-volatile Initial Value Register (IVR) enable power-up recall of user-defined tap positions.

It supports two operating modes: voltage divider (RH–RW–RL) and rheostat (RW–RL or RW–RH), with monotonic DNL ≤ ±0.5 LSB (U version) and ratiometric temperature coefficient of ±4 ppm/°C - critical for stable gain/offset adjustment across industrial temperature range (−40°C to +85°C).

Key Specifications

Pinout & Package

ISL95810UIU8 is housed in an 8-lead MSOP (Mini Small Outline Plastic) package, 3.0 mm × 3.0 mm footprint, 0.65 mm pitch, with exposed thermal pad not connected internally. Pin 1 marked by index area; lead finish is Pb-free plus anneal (RoHS compliant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-50 and MCP45HV51-503, the ISL95810UIU8 delivers superior wiper resistance (70 Ω), higher EEPROM endurance (200k cycles), and integrated hardware write protection - making it optimal for industrial trimming where precision, longevity, and robustness are prioritized over voltage headroom or multi-protocol support.

Availability

ISL95810UIU8 is available at Aetrix Electronics and suitable for LED driver calibration, audio gain control, power supply trimming, and sensor signal conditioning requiring stable component supply across long-lifecycle industrial programs.

Supply support for ISL95810UIU8 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) is a U.S.-based analog and mixed-signal semiconductor company focused on power management, precision analog, and interface solutions.

The ISL95810UIU8 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical pots in automated calibration, factory trimming, and dynamic analog adjustment applications.

FAQ

What is the default wiper position after power-up for the ISL95810UIU8?

At power-up, the ISL95810UIU8 loads the value stored in its non-volatile Initial Value Register (IVR) into the volatile Wiper Register (WR). The device ships pre-programmed with 0x80 (128 decimal) in the IVR, placing the wiper at mid-scale - approximately 25 kΩ from RL and RH terminals - unless previously reprogrammed by the user.

Does the ISL95810UIU8 support both voltage divider and rheostat configurations?

Yes, the ISL95810UIU8 supports both configurations. In voltage divider mode, RH and RL are connected to fixed reference voltages (e.g., VCC and GND), while RW provides the adjustable tap. In rheostat mode, either RH or RL is left unconnected, and RW–RL (or RW–RH) forms a two-terminal variable resistor - confirmed in the datasheet's "Principles of Operation" and Analog Specifications sections.

What is the maximum I²C clock frequency supported by the ISL95810UIU8?

The ISL95810UIU8 supports standard-mode I²C operation up to 400 kHz, as specified in its Serial Interface Specifications table. This includes guaranteed timing margins for tLOW (1300 ns), tHIGH (600 ns), and tSU:STA (600 ns), ensuring reliable communication with common microcontrollers and I²C masters without custom timing adjustments.

How does the WP (Write Protect) pin function on the ISL95810UIU8?

The WP pin on the ISL95810UIU8 is an active-low hardware lock: when pulled LOW, it disables all I²C write operations (volatile and non-volatile), causing the device to ignore incoming data bytes and respond with no ACK. When held HIGH, normal I²C write functionality is enabled - providing deterministic, firmware-independent protection against unintended register changes.

What is the wiper resistance specification for the ISL95810UIU8 and why does it matter?

The ISL95810UIU8 has a typical wiper resistance of 70 Ω at 3.3V, with a maximum of 200 Ω. This low value minimizes insertion error when used in high-impedance feedback paths (e.g., op-amp gain stages), preserving signal integrity and reducing gain deviation - especially critical in precision sensor interfaces and audio circuits where loading effects directly impact performance.