Renesas X9241AYS

Overview

X9241AYS from Intersil is a quad digital controlled potentiometer (XDCP™) IC with nonvolatile storage, 2-wire I²C-compatible interface, 64-tap resolution per channel, and 2kΩ end-to-end resistance per potentiometer. It operates from 5V ±10%, supports -40°C to +85°C industrial temperature range, and is packaged in 20-lead SOIC. It serves as a precision programmable resistor for analog signal conditioning in embedded control systems.

For engineers reviewing the X9241AYS datasheet, X9241AYS pinout, X9241AYS application, or X9241AYS equivalent, key selection considerations include its quad-channel 2kΩ configuration, nonvolatile wiper position recall from DR0 on power-up, cascading capability across arrays, 100-year data retention, and compatibility with standard I²C timing at ≤100kHz.

Technical Context

The X9241AYS implements four independent 63-segment resistor arrays, each controlled by a volatile 6-bit Wiper Counter Register (WCR) and backed by four nonvolatile Data Registers (DR0–DR3). Each potentiometer supports three-terminal potentiometer or two-terminal variable resistor operation with terminal voltage limits of +5V and -3.0V.

It uses a register-oriented 2-wire interface with slave address formed by fixed device type identifier "0101" plus user-configurable A0–A3 pins. Cascade mode is enabled via bit 7 of the WCR, allowing up to four arrays to be linked for extended resistance values (e.g., 4kΩ to 200kΩ), while bit 6 disables the wiper output for isolation.

Key Specifications

Pinout & Package

20-lead SOIC package (RoHS-compliant, Pb-free matte tin termination), dimensions per MDP0044 spec: D = 6.50 mm, E = 6.40 mm, body height A2 = 0.90 mm, lead pitch e = 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42050-I/P, the X9241AYS delivers true quad-channel integration with cascading, factory-programmed 2kΩ arrays, and guaranteed 100-year nonvolatile retention - making it optimal for space-constrained industrial calibration where long-term setting stability is critical.

Availability

X9241AYS is available at Aetrix Electronics and suitable for industrial PLC analog I/O trimming, programmable sensor calibration, laser diode bias adjustment, and audio signal level control requiring stable component supply across extended product lifecycles.

Supply support for X9241AYS 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 leader in precision analog and power management ICs, now part of Renesas Electronics, delivering high-reliability solutions for industrial, infrastructure, and communications markets.

The X9241A family was designed specifically for embedded analog trimming and calibration tasks requiring nonvolatile, multi-channel, and cascade-capable digital potentiometers in industrial temperature environments.

FAQ

What is the exact end-to-end resistance value of each potentiometer in the X9241AYS?

The X9241AYS is configured with 2kΩ end-to-end resistance per potentiometer (Pot 0 through Pot 3), as specified in the Ordering Information table for the "AYS" suffix. This value is fixed at manufacture and not user-selectable. The 2kΩ rating determines maximum wiper current (±4mA) and sets the impedance scale for analog signal conditioning circuits using the X9241AYS.

Does the X9241AYS support I²C standard-mode timing?

Yes, the X9241AYS supports standard-mode I²C with fSCL up to 100kHz, tLOW ≥ 4700 ns, and tHIGH ≥ 4000 ns. Its SDA pin is open-drain and requires an external pull-up resistor; ACK polling is supported for nonvolatile write completion detection. The X9241AYS does not support fast-mode (400kHz) or high-speed mode.

How does power-up wiper initialization work on the X9241AYS?

On power-up, the X9241AYS automatically loads the contents of Data Register 0 (DR0) into the volatile Wiper Counter Register (WCR) for each potentiometer. This ensures repeatable startup behavior without host intervention. To preserve a specific wiper position across power cycles, the host must first write that value to DR0 using the Write Data Register command before power-down.

Can the four potentiometers in the X9241AYS be cascaded together?

Yes, the X9241AYS supports cascading of all four resistor arrays using the Cascade Mode (CM) bit in the WCR. When CM = 1 for a given pot, it links to the next higher-order pot (e.g., Pot 2 → Pot 3). External wiring must connect VL/RL of the higher pot to VH/RH of the lower pot, and only one wiper remains enabled. Cascading extends total resistance from 2kΩ to 200kΩ depending on configuration.

What is the temperature range qualification for the X9241AYS?

The X9241AYS is qualified for industrial operation from -40°C to +85°C, as indicated by the "I" suffix in its ordering code (X9241AYSIZ is the replacement, but X9241AYS itself carries the same industrial temp grade). All electrical specifications - including wiper resistance, linearity, and I²C timing - are guaranteed across this full range without derating.