Renesas X93156WM8I-2.7

Overview

X93156WM8I-2.7 from Intersil is a single digitally controlled potentiometer (XDCP™) with 32-tap resolution, 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 X93156WM8I-2.7 datasheet, X93156WM8I-2.7 pinout, X93156WM8I-2.7 application, or X93156WM8I-2.7 equivalent, key selection criteria include its MSOP-8 package, ±25% RTOTAL tolerance, -40°C to +85°C industrial temperature range, and compatibility with low-power analog trim applications requiring power-up recall of last wiper setting.

Technical Context

The X93156WM8I-2.7 implements a 31-element resistor array with electronically switched wiper positions controlled by a 5-bit up/down counter. Wiper position is stored in nonvolatile EEPROM upon CS↑ while INC = HIGH, enabling automatic restoration at next power-up.

It supports true three-terminal potentiometer or two-terminal variable resistor configurations, with RH/RL terminals rated for 0–VCC voltage range and Rw wiper capable of ±0.6mA current. Temperature coefficient is ±35ppm/°C, and absolute linearity error is ±1 MI (minimum increment).

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP4017T-103E/MS, the X93156WM8I-2.7 uniquely combines 3-wire simplicity, guaranteed power-up recall, and industrial temperature rating - making it optimal for unattended embedded trim where EEPROM autonomy and minimal GPIO count are critical.

Availability

X93156WM8I-2.7 is available at Aetrix Electronics and suitable for LCD contrast control, bias voltage programming, LED brightness trim, and analog ladder network applications requiring stable component supply and long-term calibration integrity.

Supply support for X93156WM8I-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 U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X93156 series belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) product line, designed specifically for replacing mechanical potentiometers in industrial, automotive, and consumer electronics where reliability, programmability, and nonvolatile calibration are required.

FAQ

What is the supply voltage range for the X93156WM8I-2.7?

The X93156WM8I-2.7 operates from 2.7V to 5.5V, as specified in the "Recommended Operating Conditions" section of the FN8182 datasheet. This range supports direct connection to both 3.3V and 5V logic systems without external regulation, and the device maintains full functionality-including wiper movement, storage, and recall-across the entire span. The X93156WM8I-2.7 is explicitly rated for this extended range, distinguishing it from the standard X93156WM8I variant limited to 5V ±10%.

Does the X93156WM8I-2.7 retain its wiper position after power cycling?

Yes, the X93156WM8I-2.7 stores the wiper position in nonvolatile EEPROM memory. When CS transitions HIGH while INC is HIGH, the current counter value is written to memory. Upon subsequent power-up, the stored value is automatically recalled and applied to the wiper, ensuring consistent analog settings without host MCU initialization. This behavior is confirmed in the "Principles of Operation" and "Power-Up and Down Requirements" sections of the FN8182 datasheet.

How many wiper tap points does the X93156WM8I-2.7 provide?

The X93156WM8I-2.7 provides 32 discrete wiper tap points, implemented via a resistor array of 31 identical elements and a 5-bit up/down counter with decoded switch matrix. Each tap corresponds to one of 32 possible wiper positions (0 through 31), delivering a nominal step resolution of RTOTAL/31 ≈ 403Ω per step for the 12.5kΩ version. This is explicitly stated in the "Features" and "Potentiometer Specifications" tables of the FN8182 datasheet.

What package type is used for the X93156WM8I-2.7?

The X93156WM8I-2.7 uses an 8-lead Mini Small Outline Plastic (MSOP) package, designated M8.118 per JEDEC MO-187AA. Its dimensions are 3.0mm × 4.9mm × 1.1mm (D × E × A), with 0.65mm lead pitch. The package is RoHS-compliant and Pb-free, as noted in the "Ordering Information" table and "Package" feature bullet of the FN8182 datasheet.

Can the X93156WM8I-2.7 be used as a two-terminal variable resistor?

Yes, the X93156WM8I-2.7 can be configured as a two-terminal variable resistor by connecting either RH or RL to Rw and using the remaining fixed terminal with the wiper. The datasheet explicitly states this capability in the first paragraph of the "Features" section and confirms terminal voltage ratings of 0 to VCC for both RH and RL. This configuration is commonly used for current limiting, gain setting, and offset adjustment where only one adjustable node is required.