Renesas X9241AMVI

Overview

X9241AMVI from Intersil is a quad digital controlled potentiometer (XDCP™) IC with nonvolatile storage, 2-wire I²C interface, 64-tap resolution per channel, ±3.0V to +5V terminal voltage range, and -40°C to +85°C industrial temperature rating. It functions as four independent digitally adjustable resistors for precision analog control in embedded sensor conditioning and programmable gain stages.

For engineers reviewing the X9241AMVI datasheet, X9241AMVI pinout, X9241AMVI application, or X9241AMVI equivalent, this device supports register-oriented wiper control, cascaded resistor arrays up to 200kΩ, and power-up recall from DR0-critical for calibration retention and reconfigurable analog front-ends.

Technical Context

The X9241AMVI implements four monolithic CMOS resistor arrays, each with 63 segments and a 6-bit wiper counter register (WCR) decoded to select one of 64 tap points. Each array has four nonvolatile data registers (DR0–DR3) enabling storage of multiple wiper positions per potentiometer.

It operates as a slave on a 2-wire I²C bus with fixed 0101xxxx slave address prefix, supports ACK polling during nonvolatile writes (tWR = 10 ms), and allows real-time wiper adjustment via increment/decrement commands synchronized to SCL edges-enabling fine-grained analog tuning without host CPU intervention.

Key Specifications

Pinout & Package

20-lead Thin Shrink Small Outline Package (TSSOP), RoHS-compliant, 6.5 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height. Pin 1 marked by beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRZ-10 and MCP42050-I/P, the X9241AMVI uniquely combines I²C simplicity, industrial temperature range, cascading architecture, and true bipolar analog operation-making it optimal for reconfigurable analog signal chains requiring long-term calibration integrity.

Availability

X9241AMVI is available at Aetrix Electronics and suitable for programmable gain amplifiers, sensor calibration networks, audio balance controls, and isolated power supply feedback circuits requiring stable component supply and guaranteed long-term availability.

Supply support for X9241AMVI 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, delivering high-reliability solutions for industrial, infrastructure, and high-end consumer markets.

The X9241A family was designed for embedded analog reconfiguration tasks-specifically targeting calibration, trimming, and gain control in systems where nonvolatile settings, multi-channel integration, and I²C simplicity are essential.

FAQ

What is the terminal voltage range supported by the X9241AMVI?

The X9241AMVI supports VH/RH, VW/RW, and VL/RL pins from -3.0V to +5V relative to VSS. This bipolar capability enables use in AC-coupled signal paths and dual-supply analog circuits. Exceeding these limits risks latch-up or permanent damage. The absolute maximum ΔV between VH and VL is 10V, and the X9241AMVI must never be operated outside its specified -40°C to +85°C industrial temperature range.

How does the X9241AMVI handle power-up wiper initialization?

On power-up, the X9241AMVI automatically loads the contents of Data Register 0 (DR0) into the Wiper Counter Register (WCR) for each potentiometer. This ensures repeatable startup behavior without host intervention. To guarantee correct recall, VCC must ramp at ≥0.2 V/ms and reach 90% of final value before potentiometer pins are energized. Glitches on VCC exceeding 100 mV may disrupt DR0 loading in the X9241AMVI.

Can the four potentiometers in the X9241AMVI be cascaded, and how is it implemented?

Yes-the X9241AMVI supports hardware cascading of resistor arrays via its CM (Cascade Mode) bit in the WCR. Setting CM = 1 in WCR2 cascades Pot 2 with Pot 3; setting CM = 1 in WCR0 cascades Pot 0 with Pot 1. External connections require VLx/RLx of one pot tied to VH(y)/RHy of the next. Only one wiper remains enabled (DW = 0); others are disabled (DW = 1) to prevent shorts. Cascading extends total resistance from 2kΩ to 200kΩ in the X9241AMVI.

What is the endurance and data retention specification for the X9241AMVI's nonvolatile memory?

The X9241AMVI guarantees 100,000 data changes per bit per register and 100 years of data retention at +85°C. These specifications apply to all four Data Registers (DR0–DR3) per potentiometer. Nonvolatile writes (e.g., Write Data Register, XFR WCR to DR) take up to 10 ms (tWR), during which the device does not respond to I²C commands until ACK polling confirms completion. This endurance and retention make the X9241AMVI suitable for lifetime calibration storage in industrial equipment.

Does the X9241AMVI support simultaneous wiper updates across all four channels?

Yes-the X9241AMVI supports global wiper transfer instructions. The "Global XFR Data Register to WCR" command simultaneously loads DR0–DR3 values from all four pots into their respective WCRs. Similarly, "Global XFR WCR to Data Register" stores all current wiper positions to nonvolatile memory in one atomic operation. These global commands ensure synchronized analog state changes critical for multi-channel gain matching and phase-coherent trimming in the X9241AMVI.