Renesas X93156WM8I

Overview

X93156WM8I from Intersil is a single digitally controlled potentiometer (XDCP™) with Up/Down interface, 32-tap resolution, nonvolatile wiper position storage, and 12.5kΩ end-to-end resistance. It operates from 2.7V to 5.5V, draws 200µA typical active current, and is housed in an 8-lead MSOP package. It serves as a programmable voltage divider in LCD contrast control, bias trimming, and analog signal conditioning circuits.

For engineers reviewing the X93156WM8I datasheet, X93156WM8I pinout, X93156WM8I application, or X93156WM8I equivalent, this page delivers verified specifications, terminal roles, real-world use cases, and validated alternative options for precision analog adjustment in industrial and embedded systems.

Technical Context

The X93156WM8I implements a 31-element resistor array with CMOS-controlled electronic switches and a 5-bit up/down counter driving wiper selection. Its nonvolatile memory stores wiper position on CS↑ with INC↑, enabling power-up recall without external configuration.

It uses a three-wire Up/Down interface (CS, U/D, INC) with negative-edge-triggered INC and level-sensitive U/D direction control. Terminal voltages are limited to 0–VCC, and wiper resistance is specified at 1100Ω with ±1% absolute linearity over temperature.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), Pb-free, RoHS-compliant, thermal resistance θJA = 190°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X93156WM8I, AD5171BRMZ-10 offers superior temperature stability and resolution but requires I²C infrastructure, while MCP4017T-103I/P matches the Up/Down interface yet omits nonvolatile storage-making X93156WM8I optimal for self-contained, low-overhead analog trimming where power-cycle persistence is mandatory.

Availability

X93156WM8I is available at Aetrix Electronics and suitable for LCD contrast control, bias voltage trimming, and analog signal gain adjustment requiring stable component supply, long-term calibration retention, and industrial temperature operation.

Supply support for X93156WM8I 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, designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X93156WM8I belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered for replacing mechanical trimmers in industrial, medical, and test equipment where reliability, nonvolatility, and low power are critical.

FAQ

What is the supply voltage range for the X93156WM8I?

The X93156WM8I operates from 2.7V to 5.5V, supporting both 3.3V and 5V system rails. This range is explicitly defined in the ordering information for the "-2.7" suffix variant, and the device tolerates VCC ramp rates from 0.2 to 50 V/ms without malfunction. The X93156WM8I must not be operated outside this window to ensure proper EEPROM store functionality and wiper switch reliability.

Does the X93156WM8I retain its wiper setting after power loss?

Yes, the X93156WM8I stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This occurs only if the CS pin is held HIGH during initial power application. The stored value persists for 100 years and withstands 200,000 write cycles-making the X93156WM8I suitable for calibration-critical applications where manual reset is impractical.

How many wiper positions does the X93156WM8I support?

The X93156WM8I provides 32 discrete wiper tap points (0 through 31), corresponding to a 5-bit counter. Each step represents approximately 3.125% of full-scale resistance, and absolute linearity is guaranteed within ±1% across all positions. This resolution is confirmed in the block diagram, pin descriptions, and potentiometer specifications tables of the FN8182 datasheet for the X93156WM8I.

What package type is used for the X93156WM8I?

The X93156WM8I is packaged in an 8-lead MSOP (Mini Small Outline Plastic) with JEDEC MO-187AA compliance, marked as M8.118 in the datasheet. It features Pb-free terminations (RoHS-compliant), 0.65mm lead pitch, and thermal resistance θJA = 190°C/W. This compact 3mm × 3mm footprint is identical across all X93156 variants including the X93156WM8I.

Can the X93156WM8I be used as a two-terminal variable resistor?

Yes, the X93156WM8I supports both three-terminal potentiometer (RH–Rw–RL) and two-terminal variable resistor configurations (e.g., Rw–RH or Rw–RL). The datasheet explicitly states this dual-mode capability and confirms terminal voltage limits of 0 to VCC for RH and RL. In two-terminal mode, the unused terminal is left unconnected, and the X93156WM8I maintains its 12.5kΩ RTOTAL and 1100Ω wiper resistance specs.