Renesas X9241AYVZT1

Overview

X9241AYVZT1 from Intersil is a quad digital controlled potentiometer (XDCP™) IC with nonvolatile storage, 2-wire I²C interface, 64-tap resolution per channel, 2kΩ end-to-end resistance per pot, and -40°C to +85°C industrial temperature range. It functions as four independent digitally adjustable resistors in a single 20-lead TSSOP package, used for precision biasing, gain control, and offset trimming in analog front-ends.

For engineers reviewing the X9241AYVZT1 datasheet, X9241AYVZT1 pinout, X9241AYVZT1 application, or X9241AYVZT1 equivalent, key selection criteria include its 2kΩ ×4 resistor array configuration, EEPROM-backed wiper position retention, cascading capability across channels, and compatibility with standard I²C bus timing at ≤100kHz.

Technical Context

The X9241AYVZT1 implements four independent 63-segment resistor arrays, each controlled by a 6-bit volatile Wiper Counter Register (WCR) and backed by four nonvolatile Data Registers (DR0–DR3). Each pot supports direct WCR write, register-to-WCR transfer, global register updates, and real-time increment/decrement via I²C clock pulses.

It operates in normal mode or cascade mode (enabled via CM bit in WCR), where adjacent arrays are electrically linked to synthesize 4kΩ–200kΩ values. The device uses open-drain SDA with external pull-up, accepts VTERM from –3.0V to +5V, and features 100-year data retention and 100,000-cycle endurance per register bit.

Key Specifications

Pinout & Package

20-lead Thin Shrink Small Outline Package (TSSOP), RoHS-compliant, body dimensions 6.5mm × 4.4mm × 1.2mm (D × E × A), lead pitch 0.65mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP45HV51-103E/ST, the X9241AYVZT1 uniquely delivers four tightly matched 2kΩ pots with integrated nonvolatile memory and cascade support - critical for space-constrained, self-calibrating industrial signal chains requiring deterministic startup behavior.

Availability

X9241AYVZT1 is available at Aetrix Electronics and suitable for industrial sensor conditioning, laser diode biasing, programmable power supplies, and audio level control requiring stable component supply and long-term lifecycle continuity.

Supply support for X9241AYVZT1 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 solutions, now part of Renesas Electronics, with deep expertise in configurable mixed-signal ICs for industrial and infrastructure markets.

The X9241A family was designed specifically for replacing mechanical potentiometers in digitally calibrated analog systems - emphasizing nonvolatile storage, I²C simplicity, and multi-channel integration for embedded control and instrumentation.

FAQ

What is the terminal voltage rating for X9241AYVZT1?

The X9241AYVZT1 supports terminal voltages from –3.0V to +5V referenced to VSS. This ±3V/5V range applies to all VH/RH, VL/RL, and VW/RW pins. Exceeding these limits risks latch-up or permanent damage. The device is not rated for bipolar operation beyond this envelope, and absolute maximum ratings specify |VH – VL| ≤ 10V.

Does X9241AYVZT1 support cascading between its four potentiometers?

Yes, X9241AYVZT1 supports cascading via the Cascade Mode (CM) bit in the Wiper Counter Register. When CM = 1 for POTn, it links electrically to POTn+1 (with POT3 wrapping to POT0). External connections require VH/RH of the lower-order pot tied to VL/RL of the higher-order one, and only one wiper remains enabled. Cascading extends effective resistance range from 2kΩ to 200kΩ.

How does X9241AYVZT1 handle power-up wiper initialization?

X9241AYVZT1 automatically loads the contents of Data Register 0 (DR0) into the corresponding Wiper Counter Register (WCR) on power-up. This ensures repeatable startup behavior. To preserve runtime-adjusted positions, users must issue a Global XFR WCR to Data Register command before power-down. The recommended VCC ramp rate is 0.2–50 V/ms, with VCC reaching 90% before applying signals to pot pins.

What is the I²C clock frequency limit for X9241AYVZT1?

X9241AYVZT1 supports I²C clock frequencies up to 100kHz, compliant with standard-mode I²C specifications. AC timing parameters specify tLOW ≥ 4700ns and tHIGH ≥ 4000ns. The device includes internal noise filtering (Ti = 20ns) to reject glitches on SCL/SDA. For reliable ACK polling during nonvolatile writes, the master must wait up to 10ms before issuing subsequent commands.

Can X9241AYVZT1 be used as a two-terminal variable resistor?

Yes, X9241AYVZT1 can operate as a two-terminal variable resistor by connecting either VH/RH or VL/RL to the wiper VW/RW, leaving the unused terminal open or grounded depending on topology. In this mode, resistance varies from near-zero (WCR = 0x00 or 0x3F) to full 2kΩ. Wiper resistance is specified at 40–130Ω, and max wiper current is ±4mA for 2kΩ arrays.