Renesas X93156WM8IZ-2.7

Overview

X93156WM8IZ-2.7 from Intersil is a single digitally controlled potentiometer (XDCP™) with 32 wiper tap points, nonvolatile wiper position storage, and 12.5kΩ end-to-end resistance. It operates from 2.7V to 5.5V, draws only 200µA active current and 2µA standby current, and uses a 3-wire Up/Down interface for bias voltage trimming in LCD contrast control circuits.

For engineers reviewing the X93156WM8IZ-2.7 datasheet, X93156WM8IZ-2.7 pinout, X93156WM8IZ-2.7 application, or X93156WM8IZ-2.7 equivalent, this device serves as a solid-state replacement for mechanical potentiometers where power-up repeatability, low noise (–120 dBV), and temperature-stable linearity (±1% absolute) are required in space-constrained industrial designs.

Technical Context

The X93156WM8IZ-2.7 implements a 31-element resistor array with CMOS-controlled transfer gates and a 5-bit up/down counter driving wiper selection logic. Its nonvolatile memory stores wiper position using EEPROM technology, enabling automatic recall at power-up without external configuration.

Control is fully asynchronous via three digital inputs: CS (chip select), U/D (direction), and INC (negative-edge-triggered increment). The device enters low-power standby when CS is deasserted, and supports store operations only when CS transitions high while INC is high - preventing accidental writes during power sequencing.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS-compliant), dimensions per JEDEC MO-187AA (M8.118).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP4017T-103I/OT, the X93156WM8IZ-2.7 uniquely balances simple 3-wire control, guaranteed power-on repeatability, and industrial-grade temperature stability - making it optimal for cost-sensitive, self-contained analog trim functions without MCU firmware overhead.

Availability

X93156WM8IZ-2.7 is available at Aetrix Electronics and suitable for LCD contrast control, LED brightness adjustment, bias voltage programming, and analog signal conditioning requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for X93156WM8IZ-2.7 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 semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, computing, and communications systems.

The X93156WM8IZ-2.7 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically to replace mechanical trimmers in applications demanding reliability, programmability, and power-up repeatability without external memory or complex protocols.

FAQ

What is the supply voltage range supported by the X93156WM8IZ-2.7?

The X93156WM8IZ-2.7 operates from 2.7 V to 5.5 V, as specified in the "Recommended Operating Conditions" section of the FN8182 datasheet. This range allows direct integration into both 3.3 V and 5 V systems without level-shifting circuitry. Operation outside this range may cause undefined behavior or damage, and the device is not rated for 1.8 V or sub-2.7 V use.

Does the X93156WM8IZ-2.7 retain its wiper position after power cycling?

Yes, the X93156WM8IZ-2.7 stores the wiper position in nonvolatile EEPROM memory. Upon power-up, the stored value is automatically recalled and applied to the resistor array. This behavior requires the CS pin to be held high during initial power application - a design feature confirmed in the "Principles of Operation" and "Power-Up and Down Requirements" sections of the datasheet.

How many wiper positions does the X93156WM8IZ-2.7 provide?

The X93156WM8IZ-2.7 provides exactly 32 discrete wiper tap points, corresponding to a 5-bit counter and 31 resistive elements. This yields 3.125% step resolution across the full resistance range. The datasheet explicitly states "32 wiper tap points" in the Features section and confirms the 31-element array architecture on page 2.

What is the maximum current rating for the wiper terminal (Rw) of the X93156WM8IZ-2.7?

The wiper terminal (Rw) of the X93156WM8IZ-2.7 is rated for ±0.6 mA, as specified under "Potentiometer Specifications" in the "IW Wiper Current" row of the datasheet. Exceeding this current may cause excessive heating, resistance drift, or long-term reliability degradation. The device is not intended for high-current rheostat applications.

Is the X93156WM8IZ-2.7 RoHS compliant and Pb-free?

Yes, the X93156WM8IZ-2.7 is RoHS compliant and Pb-free, as indicated by the "Z" suffix in the part number and confirmed in the Ordering Information table (page 2) and "Package" feature bullet (page 1) of the FN8182 datasheet. It uses 100% matte tin plating (e3 finish) and meets IPC/JEDEC J-STD-020 reflow requirements for lead-free assembly.