Renesas ISL95310UIU10Z

Overview

ISL95310UIU10Z from Renesas (formerly Intersil) is a digitally controlled potentiometer (XDCP™) with 50kΩ total resistance, 128-tap resolution, Up/Down serial interface, nonvolatile wiper position storage, and 0V to +13.2V terminal voltage capability. It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming applications such as LCD contrast control and bias adjustment circuits.

For engineers reviewing the ISL95310UIU10Z datasheet, ISL95310UIU10Z pinout, ISL95310UIU10Z application, or ISL95310UIU10Z equivalent, key selection criteria include its 50kΩ RTOTAL, ±3.0mA wiper current rating, 70Ω typical wiper resistance at 3.3V, -40°C to +85°C industrial temperature range, and 10-lead MSOP package compatibility with Pb-free reflow profiles.

Technical Context

The ISL95310UIU10Z implements a 127-element resistor array with a digitally controlled wiper driven by a 7-bit up/down counter and decoded via transfer gates. Its operation relies on three dedicated digital inputs-CS (chip select), U/D (direction), and INC (negative-edge-triggered increment)-to control wiper movement and initiate nonvolatile store operations.

Wiper position is retained in nonvolatile memory with 50-year data retention at ≤75°C and 200,000 write cycles per bit. The device supports both voltage divider mode (0V at RL, V+ at RH) and variable resistor mode (RW–RL or RW–RH), with ratiometric temperature coefficient of ±4 ppm/°C and resistance TC of ±45 ppm/°C.

Key Specifications

Pinout & Package

ISL95310UIU10Z is housed in a 10-lead MSOP (Mini Small Outline Plastic) package, RoHS-compliant with matte tin termination, MSL3 rated, and compatible with standard SnPb and Pb-free reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ50 and MCP41050-I/P, the ISL95310UIU10Z uniquely supports 13.2V analog operation with dedicated V+, offers superior ±4 ppm/°C ratiometric TC, and guarantees deterministic power-up behavior via nonvolatile recall-critical for unattended industrial equipment.

Availability

ISL95310UIU10Z is available at Aetrix Electronics and suitable for LCD contrast control, power supply bias adjustment, sensor offset compensation, and audio tone control applications requiring stable component supply across extended product lifecycles.

Supply support for ISL95310UIU10Z 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

Renesas Electronics Corporation (acquired Intersil in 2017) is a global semiconductor leader delivering high-performance analog, power management, and embedded processing solutions for industrial, automotive, and infrastructure markets.

The ISL95310UIU10Z belongs to Intersil's XDCP™ family of nonvolatile digital potentiometers, engineered specifically for robust analog trimming in harsh environments where mechanical potentiometers suffer from wear, contamination, or vibration-induced drift.

FAQ

What is the maximum allowable voltage on the RH, RL, and RW terminals of the ISL95310UIU10Z?

The ISL95310UIU10Z supports a terminal voltage range of 0V to +13.2V on RH, RL, and RW pins relative to GND. This rating applies when V+ is set between 8.0V and 13.2V and permits direct connection to high-voltage analog rails without external attenuation or level-shifting circuitry. Exceeding +13.2V violates absolute maximum ratings and risks permanent damage.

Does the ISL95310UIU10Z retain its wiper position after power cycling?

Yes, the ISL95310UIU10Z automatically recalls its last stored wiper position from nonvolatile memory upon power-up, provided VCC rises monotonically and reaches ≥2.6V within 7.5ms. The device stores wiper data when CS transitions HIGH while INC is HIGH, and retains it for 50 years at ≤75°C-enabling fully autonomous, repeatable startup behavior without MCU intervention.

What is the wiper resistance specification for the ISL95310UIU10Z and how does it affect circuit performance?

The ISL95310UIU10Z has a typical wiper resistance of 70Ω at 3.3V, with a maximum of 200Ω. This on-resistance introduces gain error in op-amp feedback networks and voltage division ratio error proportional to RTOTAL. For example, in a 50kΩ divider, 70Ω adds ~0.14% error-critical in precision biasing but negligible in coarse adjustments like LCD contrast.

Can the ISL95310UIU10Z operate with different supply voltages for logic and analog sections?

Yes, the ISL95310UIU10Z uses two independent supplies: VCC (2.7V–5.5V) for digital logic and V+ (8.0V–13.2V) for the resistor array. This separation allows interfacing with 3.3V or 5V microcontrollers while driving analog circuits up to 13.2V. Proper sequencing-VCC applied before or simultaneously with V+-is mandatory to prevent undefined wiper states.

How many wiper adjustment cycles can the ISL95310UIU10Z endure before wear-out?

The ISL95310UIU10Z guarantees 200,000 nonvolatile store cycles per bit and 50-year data retention at ≤75°C. Each wiper movement (via INC/U/D) is a volatile operation with unlimited endurance; only explicit CS↑+INC↑ store commands consume the 200k-cycle EEPROM budget. Field deployments in industrial controls routinely exceed 10 years without reaching this limit.