Renesas X9241AUSIT1

Overview

X9241AUSIT1 from Intersil is a quad digital controlled potentiometer (XDCP™) IC with nonvolatile storage, 2-wire I²C interface, 64-tap resolution per channel, 5V ±10% supply, and 2kΩ/10kΩ/50kΩ resistor array options. It functions as four independent digitally adjustable resistors in one monolithic CMOS device, used for precision gain/offset trimming, sensor calibration, and programmable biasing in industrial control systems.

For engineers reviewing the X9241AUSIT1 datasheet, X9241AUSIT1 pinout, X9241AUSIT1 application, or X9241AUSIT1 equivalent, this page delivers verified specifications, validated pin roles, confirmed cascade operation capability, real-world use cases, and two technically documented alternative parts - all extracted from Intersil FN8164 Rev 7.00.

Technical Context

The X9241AUSIT1 implements four independent 63-element resistor arrays with FET-switched wiper terminals, each controlled by a volatile 6-bit Wiper Counter Register (WCR) and backed by four nonvolatile Data Registers (DR0–DR3). Power-up automatically loads DR0 into the WCR for each potentiometer.

It uses a standard 2-wire I²C-compatible interface with slave address formed by fixed 0101b prefix plus user-configurable A0–A3 pins. All register reads/writes and wiper transfers (including global operations across all four pots) are supported via defined 2- or 3-byte instruction sequences, with ACK polling enabled during nonvolatile writes.

Key Specifications

Pinout & Package

20-lead SOIC package (RoHS-compliant, Pb-free matte tin finish); dimensions per MDP0044 specification: 6.50mm × 6.40mm × 1.20mm height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRZ-10 and MCP41010-I/P, the X9241AUSIT1 uniquely combines I²C interface, quad integration, cascading capability, and automatic DR0 recall - making it optimal for space-constrained industrial systems requiring robust, field-programmable analog tuning.

Availability

X9241AUSIT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplification, and power supply trim applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for X9241AUSIT1 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 is a leading provider of precision analog and power management solutions, serving industrial, infrastructure, and high-end consumer markets.

The X9241A product line delivers digitally programmable analog tuning for embedded systems requiring nonvolatile configuration, I²C control, and multi-channel resistor adjustment - targeting calibration, trimming, and signal conditioning applications.

FAQ

What is the resistor value configuration for X9241AUSIT1?

The X9241AUSIT1 is configured with 2kΩ, 10kΩ, and 50kΩ resistor arrays per potentiometer - specifically Pot 0 = 2kΩ, Pot 1 = 10kΩ, Pot 2 = 10kΩ, Pot 3 = 50kΩ - as defined in the ordering information table of FN8164 Rev 7.00. This configuration is fixed for the X9241AUSIT1 variant and cannot be altered post-manufacture. Cascading allows combinations up to 200kΩ.

Does X9241AUSIT1 support I²C standard-mode timing?

Yes, X9241AUSIT1 supports standard-mode I²C operation with maximum SCL clock frequency of 100 kHz, tLOW ≥ 4700 ns, tHIGH ≥ 4000 ns, and rise/fall times compliant with I²C specifications. Its AC electrical specs (FN8164 p.12) confirm full compatibility with standard-mode masters, including proper START/STOP timing and ACK response behavior.

How does power-up initialization work in X9241AUSIT1?

On power-up, X9241AUSIT1 automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR), establishing the initial wiper position. This occurs after VCC reaches 90% of final value and potentiometer pins are powered - per recommended sequencing in FN8164 p.11. The X9241AUSIT1 retains DR0 values nonvolatily for 100 years.

Can X9241AUSIT1 operate with negative terminal voltages?

Yes, X9241AUSIT1 supports terminal voltages from –3.0V to +5.0V relative to VSS, enabling bipolar operation in AC-coupled or dual-supply signal paths. However, the supply voltage VCC must remain at +5V ±10%, and the absolute voltage difference |VH – VL| must not exceed 10V - as specified in Absolute Maximum Ratings (FN8164 p.10).

What is the purpose of the Cascade Mode (CM) bit in X9241AUSIT1?

The Cascade Mode (CM) bit - bit 7 of the Wiper Counter Register - enables inter-potentiometer resistor array linking. When set to '1', the VL/RL of a higher-order pot (e.g., Pot 2) connects to VH/RH of the next lower-order pot (e.g., Pot 1), forming a continuous resistive chain. Only one wiper remains active; others must be disabled via DW bits to prevent conflict - allowing extended resistance ranges up to 200kΩ.