Renesas ISL95310WIU10Z

Overview

ISL95310WIU10Z from Intersil is a digitally controlled potentiometer (XDCP™) with 10kΩ total resistance, 128-tap up/down interface, 0–13.2V terminal voltage range, ±4 ppm/°C ratiometric temperature coefficient, and nonvolatile wiper position storage. It replaces mechanical potentiometers in precision analog trimming applications such as LCD contrast control and bias adjustment.

For engineers reviewing the ISL95310WIU10Z datasheet, ISL95310WIU10Z pinout, ISL95310WIU10Z application, or ISL95310WIU10Z equivalent, key selection criteria include its 10-lead MSOP package, 70Ω typical wiper resistance at 3.3V, 2µA standby current at 3.6V, -40°C to +85°C industrial temperature range, and compatibility with 2.7–5.5V VCC and 8–13.2V V+ bias rails.

Technical Context

The ISL95310WIU10Z 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 nonvolatile Initial Value Register (IVR) recalls stored wiper position on power-up, while volatile Wiper Counter Register (WR) enables real-time adjustment without memory write latency.

Operation requires strict sequencing: VCC must be applied before or simultaneously with V+, and CS must be high before VCC ramp exceeds 1V to prevent inadvertent store. The "make-before-break" wiper switching ensures continuity during tap transitions, and the device supports both three-terminal potentiometer and two-terminal variable resistor configurations.

Key Specifications

Pinout & Package

ISL95310WIU10Z is housed in a 10-lead MSOP (Mini Small Outline Plastic) package, RoHS-compliant with Pb-free plus anneal finish, footprint per JEDEC MO-187-BA, dimensions 3.0mm × 3.0mm × 1.1mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL95310WIU10Z, ISL95310UIU10Z offers higher resistance for low-current biasing but identical interface and reliability, while AD5170BRMZ-10 trades superior tempco and simpler control for I²C flexibility and finer resolution-making each optimal for distinct system architecture constraints.

Availability

ISL95310WIU10Z is available at Aetrix Electronics and suitable for LCD contrast control, power supply bias adjustment, sensor signal conditioning, and industrial DAC offset compensation requiring stable component supply and long-term calibration retention.

Supply support for ISL95310WIU10Z 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 leading provider of precision analog and power management solutions, now part of Renesas Electronics, with deep expertise in high-reliability industrial and automotive signal conditioning ICs.

The ISL95310WIU10Z belongs to Intersil's XDCP™ family of nonvolatile digital potentiometers, designed specifically for replacing mechanical trimmers in harsh-environment applications where long-term stability, temperature resilience, and field programmability are critical.

FAQ

What is the maximum allowable voltage on the RH, RW, and RL terminals of the ISL95310WIU10Z?

The ISL95310WIU10Z supports a terminal voltage range of 0V to +13.2V on RH, RW, and RL pins relative to GND. This rating is absolute and independent of VCC; exceeding +13.2V risks permanent damage. The device is rated for ΔV = |V(RH) − V(RL)| ≤ V+, so proper biasing of V+ is required to maintain safe operation across the full resistor array.

Does the ISL95310WIU10Z require external pull-up resistors on its U/D, INC, or CS pins?

No, the ISL95310WIU10Z does not require external pull-up resistors on U/D, INC, or CS. Its digital inputs feature CMOS-compatible thresholds (VIL = 0.3×VCC, VIH = 0.7×VCC) and internal hysteresis (0.05×VCC), allowing direct connection to microcontroller GPIOs. Input leakage remains within ±10 µA, making externally biased interfaces unnecessary for standard logic-level drive.

How is nonvolatile wiper position stored and recalled in the ISL95310WIU10Z?

The ISL95310WIU10Z stores wiper position in a nonvolatile Initial Value Register (IVR) using EEPROM technology. A store is triggered by raising CS from LOW to HIGH while INC is held HIGH. On power-up, when VCC crosses the 1.8–2.6V recall threshold, the IVR contents load into the volatile Wiper Counter Register (WR), positioning the wiper automatically-no host initialization code is needed for default operation of ISL95310WIU10Z.

Can the ISL95310WIU10Z operate with VCC = 3.3V and V+ = 12V simultaneously?

Yes, the ISL95310WIU10Z is fully specified to operate with VCC = 3.3V (within 2.7–5.5V range) and V+ = 12V (within 8–13.2V range) simultaneously. This dual-rail capability allows digital logic to run from a low-noise 3.3V supply while the analog resistor array interfaces directly with higher-voltage signal chains-enabling clean separation of digital and analog domains in ISL95310WIU10Z designs.

What is the wiper resistance specification for the ISL95310WIU10Z, and how does it affect circuit performance?

The ISL95310WIU10Z has a typical wiper resistance of 70Ω at 3.3V, with a maximum of 200Ω. This low on-resistance minimizes insertion error in voltage divider configurations-especially critical in high-gain or high-impedance feedback paths. For example, in a 10kΩ divider with 1V across RH–RL, 70Ω adds only ~0.7% error, preserving accuracy without requiring external buffer amplifiers in most ISL95310WIU10Z applications.