Renesas X9241AMVIT1

Overview

X9241AMVIT1 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 20-lead TSSOP package rated for -40°C to +85°C operation. It functions as four independent digitally adjustable resistors in systems requiring precision analog trimming, gain/offset calibration, or programmable biasing.

For engineers reviewing the X9241AMVIT1 datasheet, X9241AMVIT1 pinout, X9241AMVIT1 application, or X9241AMVIT1 equivalent, this device supports register-oriented wiper control, cascaded resistor array configuration up to 200kΩ, nonvolatile data retention for 100 years, and EEPROM endurance of 100,000 write cycles - critical for embedded calibration, factory-set parameter storage, and field-updatable analog front-ends.

Technical Context

The X9241AMVIT1 integrates four monolithic CMOS resistor arrays (63 segments each), each with a volatile 6-bit Wiper Counter Register (WCR) and four nonvolatile Data Registers (DR0–DR3). Wiper position is selected via decoded WCR output driving FET switches across the array, enabling precise 1.6% resolution voltage division.

It implements a slave-only 2-wire I²C interface with fixed 0101xxxx binary address prefix, supports global and per-pot register transfers, and features cascade mode (CM bit) and wiper disable (DW bit) for extended resistance range and isolation. Power-up automatically loads DR0 into each WCR.

Key Specifications

Pinout & Package

Package: 20-lead Thin Shrink Small Outline Package (TSSOP), RoHS-compliant, Pb-free matte tin termination, 6.5mm × 4.4mm body, 0.65mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42010-I/P, the X9241AMVIT1 uniquely delivers four independent nonvolatile pots with configurable resistance values and hardware-supported cascading - making it optimal for compact, self-calibrating analog subsystems requiring long-term parameter retention without external memory.

Availability

X9241AMVIT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and embedded audio level control requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for X9241AMVIT1 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 specifically for embedded analog trimming and calibration tasks requiring nonvolatile storage, multi-channel integration, and robust industrial temperature operation - targeting applications where mechanical potentiometers fail due to wear or environmental stress.

FAQ

What is the operating voltage range for the potentiometer terminals on the X9241AMVIT1?

The X9241AMVIT1 supports terminal voltages from –3.0V to +5V referenced to VSS. This bipolar range enables use in AC-coupled circuits, dual-supply op-amp configurations, and rail-to-rail signal conditioning paths. Exceeding these limits risks damage to internal FET switches and resistor arrays. The absolute maximum rating for ΔV (VH–VL) is 10V.

How does the X9241AMVIT1 handle power-up initialization?

On power-up, the X9241AMVIT1 automatically loads the contents of Data Register 0 (DR0) into each potentiometer's volatile Wiper Counter Register (WCR), restoring the last stored wiper position. This recall occurs after VCC reaches 90% of its final value and requires proper power sequencing: VCC must ramp first, followed by application of signals to VH/VL/VW pins. Glitches on VCC >100mV may disrupt initialization.

Can the four potentiometers in the X9241AMVIT1 be configured with different resistance values?

Yes - the X9241AMVIT1 is factory-configured with distinct resistance values per channel: Pot 0 = 2kΩ, Pot 1 = 10kΩ, Pot 2 = 10kΩ, and Pot 3 = 50kΩ. These values are fixed per device variant and cannot be altered in-circuit. Cascading (via CM bit) allows synthesis of extended values (e.g., 4kΩ–200kΩ), but individual pot values remain unchanged.

What is the purpose of the Cascade Mode (CM) and Disable Wiper (DW) bits in the WCR?

The CM bit (bit 7 of WCR) enables cascading of adjacent resistor arrays - e.g., setting CM=1 in Pot2 links it to Pot3 to form a single 126-segment array. The DW bit (bit 6) disables the wiper output, electrically isolating VW/RW. In cascade mode, only one wiper remains enabled; others must be disabled to prevent loading or shorting the combined array.

Does the X9241AMVIT1 support I²C repeated start conditions?

Yes - the X9241AMVIT1 fully supports I²C repeated start conditions, with specified setup time (tSU:STA ≥4000ns) and hold time (tHD:STA ≥4000ns). This enables efficient multi-byte transactions (e.g., writing to multiple registers) without releasing the bus, reducing protocol overhead and improving system responsiveness during calibration sequences.