Renesas X93155UM8IZ

Overview

X93155UM8IZ from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 32-tap, 50kΩ end-to-end resistor array with nonvolatile wiper position storage. It functions as a two-terminal variable resistor controlled via 3-wire up/down interface (CS, U/D, INC), operates at 5V ±10%, and retains settings for 100 years. It is used in LCD contrast adjustment and analog gain/bias trimming circuits where mechanical potentiometer replacement and power-cycle persistence are required.

For engineers reviewing the X93155UM8IZ datasheet, X93155UM8IZ pinout, X93155UM8IZ application, or X93155UM8IZ equivalent, key selection criteria include its 50kΩ RTOTAL tolerance (±25%), 200µA active current, 2.0µA standby current, -40°C to +85°C industrial temperature range, and MSOP-8 package compatibility with Pb-free reflow profiles.

Technical Context

The X93155UM8IZ integrates a 5-bit up/down counter, 5-bit nonvolatile memory, and a 31-element resistor ladder with electronic wiper switching. Wiper movement is edge-triggered on INC with direction controlled by U/D, and CS enables selection and initiates nonvolatile store when transitioned high while INC is high.

It implements solid-state resistance variation without moving parts, supports terminal voltages from VSS to VCC, and features temperature-compensated linearity (±1 MI absolute, ±0.5 MI relative). The device enters low-power standby after store completion and recalls last stored wiper position on power-up when CS is held high.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), Pb-free, RoHS-compliant, 3.0mm × 3.0mm body, 0.65mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ10 and MCP41010-I/P, the X93155UM8IZ uniquely combines up/down simplicity, 50kΩ RTOTAL, nonvolatile retention, and MSOP-8 footprint-making it optimal for industrial analog trimming where minimal GPIO count and power-cycle reliability are mandatory.

Availability

X93155UM8IZ is available at Aetrix Electronics and suitable for LCD contrast adjustment, analog gain trimming, and bias voltage control requiring stable component supply across industrial temperature ranges and long-term calibration integrity.

Supply support for X93155UM8IZ 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 industrial, communications, and computing applications, emphasizing precision, reliability, and low-power operation.

The X93155UM8IZ belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered specifically for replacing mechanical trimmers in analog signal-path calibration where nonvolatile setting retention and solid-state reliability are essential.

FAQ

What is the maximum allowable voltage across RH and RL terminals of the X93155UM8IZ?

The X93155UM8IZ permits terminal voltages from VSS to VCC only. With VCC = 5V ±10%, the absolute maximum RH–RL voltage is 5.5V. Exceeding this violates absolute maximum ratings and risks permanent damage. The device does not support bipolar or floating-voltage operation beyond the supply rails.

Does the X93155UM8IZ require an external microcontroller to retain wiper position after power loss?

No. The X93155UM8IZ stores wiper position in on-chip nonvolatile memory. Once stored via CS HIGH + INC HIGH sequence, the value persists for 100 years without external power or controller. On subsequent power-up, the wiper automatically returns to that stored position if CS is held high during initialization.

Can the X93155UM8IZ operate from a 3.3V supply?

No. The X93155UM8IZ is specified only for VCC = 5V ±10% (4.5V to 5.5V). Its logic thresholds (VIH = 0.7×VCC, VIL = 0.1×VCC), active current, and resistor array design are optimized for 5V operation. Using 3.3V will result in unreliable U/D/INC recognition and failure to store or recall wiper positions.

What is the purpose of the NC pin (Pin 5) on the X93155UM8IZ?

Pin 5 is designated NC (No Connection) and has no internal connection. It may be left unconnected or tied to any voltage between VSS and VCC without affecting operation. It is not a ground or supply pin, nor does it serve as a thermal pad or reference node-its sole function is mechanical package symmetry.

How many write cycles can the nonvolatile memory of the X93155UM8IZ endure?

The X93155UM8IZ guarantees 200,000 data changes per bit in its nonvolatile memory. This endurance rating applies to individual wiper position stores-not cumulative toggles-and is validated per JEDEC standards. Each store operation writes the full 5-bit wiper value; partial updates are not supported.