Renesas X93154UM8I-3

Overview

X93154UM8I-3 from Intersil is a low-noise, low-power, 32-tap digitally controlled potentiometer (XDCP™) implemented as a two-terminal variable resistor with 50 kΩ end-to-end resistance, 3-wire serial interface (CS/U/D/INC), and nonvolatile wiper position storage. It operates from 3V ±10%, draws ≤250 µA active current, and is used for precision bias/gain control and LCD contrast adjustment in industrial temperature range (–40°C to +85°C).

For engineers reviewing the X93154UM8I-3 datasheet, X93154UM8I-3 pinout, X93154UM8I-3 application, or X93154UM8I-3 equivalent, this page delivers verified specifications, validated pin functions, confirmed 8-lead MSOP package mapping, real-world use cases in analog trimming circuits, and two manufacturer-validated alternative parts with documented functional and application differences.

Technical Context

The X93154UM8I-3 integrates a 31-element resistor array, 5-bit up/down counter, nonvolatile EEPROM memory, and transfer gate decoding logic. Wiper position is controlled via negative-edge-triggered INC input synchronized with U/D direction control and CS-select enable.

It supports volatile wiper movement during operation and nonvolatile store-on-CS-high-with-INC-high, enabling power-up recall of last-trimmed settings. Terminal voltage range is 0 to VCC, with RH/RL pins functioning as fixed endpoints and no internal connection to the wiper output terminal - the device is strictly a two-terminal potentiometer.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), Pb-free/RoHS compliant, 3.0 mm × 3.0 mm body, 0.65 mm 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 X93154UM8I-3 uniquely combines 3-wire simplicity, 50 kΩ RTOTAL optimized for low-current bias networks, guaranteed power-up recall, and strict 3V operation - making it optimal for cost-sensitive, low-pin-count, battery-powered analog trimming where EEPROM persistence is mandatory.

Availability

X93154UM8I-3 is available at Aetrix Electronics and suitable for LCD contrast control, instrumentation amplifier gain trim, and microcontroller-based bias adjustment requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.

Supply support for X93154UM8I-3 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 analog and mixed-signal semiconductor company focused on power management, precision analog, and interface ICs.

The X93154UM8I-3 belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) product line, designed specifically for replacing mechanical trimmers in industrial, medical, and consumer electronics where reliability, programmability, and nonvolatile setting retention are essential.

FAQ

What is the operating voltage range for the X93154UM8I-3?

The X93154UM8I-3 operates exclusively from a 3V ±10% supply (2.7V to 3.3V). It is not rated for 5V operation, and applying voltages outside this range may damage the device or cause undefined behavior. The absolute maximum rating for VCC is +6.5V, but functional operation is guaranteed only within the recommended 3V ±10% window specified in the FN8180 datasheet.

Does the X93154UM8I-3 have a dedicated wiper output pin?

No, the X93154UM8I-3 does not provide a separate wiper output pin. It is configured strictly as a two-terminal variable resistor between RH and RL. The wiper node is internal and inaccessible - the device implements only end-to-end resistance variation, not three-terminal potentiometer functionality. This architecture simplifies layout but precludes use in traditional voltage-divider configurations requiring a center-tap output.

How is nonvolatile storage triggered on the X93154UM8I-3?

Nonvolatile storage on the X93154UM8I-3 is triggered by a rising edge on the CS pin while the INC pin is held HIGH. This specific condition writes the current 5-bit wiper position to EEPROM. The store operation takes 5–10 ms to complete, after which the device enters standby mode. Accidental stores during power-up are prevented by requiring both CS rise and INC HIGH simultaneously - a sequence not naturally occurring during VCC ramp.

What is the meaning of "RH" and "RL" terminal labeling on the X93154UM8I-3?

RH and RL on the X93154UM8I-3 denote fixed terminals whose functional polarity depends on the U/D input state: RH is the "high" terminal when U/D = HIGH (wiper moves toward RH), and RL becomes the "low" terminal in that mode. When U/D = LOW, their roles reverse. Both pins tolerate 0 to VCC voltage and serve as the two endpoints of the 31-element resistor string - they are electrically symmetric and interchangeable in static circuit design.

Is the X93154UM8I-3 pin-compatible with other members of the X93154 family?

Yes, the X93154UM8I-3 shares identical 8-lead MSOP pinout and electrical interface with all X93154 variants including X93154UM8IZ-3 and X93154UM8I. Differences among these part numbers relate only to tape-and-reel packaging (T1 suffix), date code, or RoHS compliance marking (Z suffix), not to pin function, timing, or logic behavior. All share the same INC/U/D/CS control protocol and RH/RL/NC/VSS/VCC terminal assignments.