Renesas X9241AWSIT2

Overview

X9241AWSIT2 from Intersil is a quad digital controlled potentiometer (XDCP™) with nonvolatile storage, 2-wire I²C interface, 64-tap resolution per channel, 10kΩ end-to-end resistance per pot, and operation over -40°C to +85°C. It functions as four independent digitally adjustable resistors in a single SOIC-20 package, used for precision gain/offset trimming in analog front-ends and programmable biasing in sensor signal chains.

For engineers reviewing the X9241AWSIT2 datasheet, X9241AWSIT2 pinout, X9241AWSIT2 application, or X9241AWSIT2 equivalent, key selection criteria include its 10kΩ per-pot resistance value, industrial temperature range, nonvolatile register retention (100 years), 2-wire serial control compatibility, and cascading capability across all four arrays.

Technical Context

The X9241AWSIT2 implements four independent 63-segment resistor arrays, each controlled by a 6-bit volatile Wiper Counter Register (WCR) and backed by four 8-bit nonvolatile Data Registers (DR0–DR3). Wiper position is set via direct write, register transfer, or increment/decrement commands over I²C.

It supports cascade mode via CM bit control, enabling combined resistance values up to 200kΩ; wiper disable (DW bit) allows terminal isolation. All nonvolatile writes complete in ≤10ms with 100,000-cycle endurance per register bit.

Key Specifications

Pinout & Package

Package: 20-lead SOIC (Small Outline Integrated Circuit), RoHS-compliant, surface-mount, body width 7.5mm, pitch 1.27mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9241AWSIT2, AD5204BRZ10 offers higher resolution but lacks nonvolatile wiper recall and cascade capability, while MCP42010-I/P omits nonvolatile memory entirely-making X9241AWSIT2 uniquely suited for self-contained, recalibratable analog tuning in industrial systems.

Availability

X9241AWSIT2 is available at Aetrix Electronics and suitable for industrial sensor conditioning, programmable power supply trimming, and audio level control requiring stable component supply and long-term calibration integrity.

Supply support for X9241AWSIT2 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 ICs, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.

The X9241A family was designed specifically for digitally reconfigurable analog signal paths in space-constrained, calibration-critical applications-emphasizing nonvolatile retention, low power, and robust serial control.

FAQ

What is the resistance tolerance and temperature coefficient of the X9241AWSIT2?

The X9241AWSIT2 has an end-to-end resistance tolerance of ±20% and a temperature coefficient of ±300 ppm/°C for RTOTAL. These values are specified across the full -40°C to +85°C operating range and apply to each of the four 10kΩ potentiometer arrays. The ratiometric temperature coefficient is tighter at ±20 ppm/°C, supporting stable voltage-divider performance under thermal variation. These parameters are measured and characterized per the FN8164 Rev 7.00 datasheet.

Does the X9241AWSIT2 support true I²C bus addressing with multiple devices?

Yes, the X9241AWSIT2 supports multi-drop I²C operation using its A0–A3 address pins to configure the 4 LSBs of the 7-bit slave address (fixed prefix 0101). This allows up to 16 X9241AWSIT2 devices on a single I²C bus. Each device responds only when its unique address matches the transmitted address byte, enabling coordinated control of multiple quad-pot units in complex analog systems without bus contention.

How does the cascade mode work on the X9241AWSIT2, and what is its practical resistance range?

Cascade mode on the X9241AWSIT2 is enabled by setting the CM bit (bit 7) in a WCR, linking two adjacent potentiometer arrays (e.g., POT2 to POT3). When cascaded, their 10kΩ arrays combine into a single 20kΩ path. All four pots can be linked to achieve 40kΩ, and combinations with different base values (e.g., 2kΩ + 10kΩ) yield 4kΩ–200kΩ total. External wiring of VH/VL terminals is required, and only one wiper remains active-controlled via the master pot's WCR.

What happens to the wiper position of the X9241AWSIT2 after power cycling?

On power-up, the X9241AWSIT2 automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR), restoring the last stored wiper position. This nonvolatile recall occurs without MCU intervention and is guaranteed for 100 years. To preserve a modified wiper position, a global or individual XFR WCR to Data Register command must be issued before power-down-otherwise, DR0 contents remain unchanged and the prior setting is restored.

Can the X9241AWSIT2 be used as a two-terminal variable resistor, and what are the limitations?

Yes, the X9241AWSIT2 can operate as a two-terminal variable resistor by connecting either VH or VL to the wiper (VW) and using the remaining terminal as the adjustable node. In this configuration, maximum wiper current is ±3mA for 10kΩ pots, and power dissipation per pot must stay below 50mW. The wiper resistance is 40–130Ω (typical), and absolute linearity error is ±1 MI (where MI = RTOTAL/63), making it suitable for moderate-precision current-source or gain-control applications-but not ultra-high-linearity references.