Renesas X9241AMVIZT1

Overview

X9241AMVIZT1 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 RoHS-compliant packaging. It functions as four independent digitally adjustable resistors for precision analog signal conditioning in embedded control systems.

For engineers reviewing the X9241AMVIZT1 datasheet, X9241AMVIZT1 pinout, X9241AMVIZT1 application, or X9241AMVIZT1 equivalent, key selection criteria include its quad-channel nonvolatile wiper positioning, cascading resistor array capability, industrial temperature range (–40°C to +85°C), 100-year data retention, and compatibility with standard I²C bus timing at ≤100 kHz.

Technical Context

The X9241AMVIZT1 integrates four monolithic CMOS resistor arrays-each with 63 discrete segments and 64 tap points-controlled by individual volatile Wiper Counter Registers (WCR) and four nonvolatile Data Registers (DR0–DR3) per channel. Its 2-wire serial interface implements full I²C slave protocol compliance including start/stop detection, acknowledge handshake, and address matching via A0–A3 pins.

Each potentiometer supports normal operation and cascade mode (enabled via bit 7 of WCR), allowing series connection of adjacent arrays to achieve end-to-end resistance values from 4 kΩ to 200 kΩ. Wiper isolation (via DW bit) and increment/decrement command enable fine-grained real-time adjustment without host CPU intervention.

Key Specifications

Pinout & Package

20-lead thin shrink small outline package (TSSOP), RoHS-compliant, 0.65 mm lead pitch, body dimensions 6.5 mm × 4.4 mm × 1.2 mm (D × E × A). Designed for surface-mount reflow assembly.

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 X9241AMVIZT1 uniquely delivers four independently configurable nonvolatile pots with hardware-enabled cascading-enabling compact, self-initializing analog trimming in space-constrained industrial systems without firmware dependency.

Availability

X9241AMVIZT1 is available at Aetrix Electronics and suitable for LED driver calibration, audio mixer gain control, DC-DC feedback trimming, and sensor signal conditioning requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for X9241AMVIZT1 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 embedded analog trimming applications requiring nonvolatile configuration storage, multi-channel integration, and robust I²C interoperability in harsh operating environments.

FAQ

What is the default power-up behavior of the X9241AMVIZT1?

On power-up, the X9241AMVIZT1 automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR), establishing a known, nonvolatile starting position without host intervention. This behavior is guaranteed across the full –40°C to +85°C operating range and requires no external initialization sequence. The X9241AMVIZT1 thus ensures deterministic analog output at system boot.

Can the X9241AMVIZT1 be used with a 3.3 V I²C bus?

Yes, the X9241AMVIZT1 supports standard-mode I²C signaling with VIL = 0.8 V and VIH = 2.0 V, making it fully compatible with 3.3 V microcontrollers. Its SDA pin is open-drain and requires an external pull-up resistor (typically 2.2–4.7 kΩ to 3.3 V), while SCL operates correctly with 3.3 V logic levels. The device's core logic and resistor arrays remain powered from its dedicated 5 V ±10% VCC supply.

How does cascade mode work on the X9241AMVIZT1?

Cascade mode in the X9241AMVIZT1 is enabled by setting bit 7 (CM) of a potentiometer's WCR to '1', linking its VL/RL terminal to the VH/RH terminal of the next higher-order pot (e.g., Pot2→Pot3). Only one wiper remains active (others disabled via DW bit), and wiper movement spans both arrays seamlessly. External wiring must connect VH/RH, VL/RL, and wipers per Figure 9 in the datasheet; the X9241AMVIZT1 handles inter-array stepping transparently during increment/decrement commands.

What is the maximum wiper current rating for each pot in the X9241AMVIZT1?

The X9241AMVIZT1 specifies maximum wiper current as ±4 mA for the 2 kΩ pot (Pot0) and ±3 mA for the 10 kΩ and 50 kΩ pots (Pots1–3), measured under continuous DC conditions. These limits apply per channel and are derated linearly above +70°C per the DCP Wiper Current De-rating Curve. Exceeding these currents risks accelerated wear or parametric shift due to localized heating in the resistor array.

Does the X9241AMVIZT1 support simultaneous update of all four potentiometers?

Yes, the X9241AMVIZT1 supports global transfer instructions: "Global XFR Data Register to WCR" and "Global XFR WCR to Data Register". These commands synchronize wiper positions or nonvolatile storage across all four potentiometers in a single I²C transaction, eliminating timing skew between channels-a critical capability for matched gain/offset adjustments in multi-channel instrumentation systems using the X9241AMVIZT1.