Renesas X9241AYSI

Overview

X9241AYSI from Intersil is a quad digital controlled potentiometer (XDCP™) IC with nonvolatile storage, 2-wire I²C-compatible interface, 64-tap resolution per channel, and -40°C to +85°C industrial temperature range. It integrates four independent 2kΩ resistor arrays in a single SOIC-20 package and supports cascade configuration for extended resistance values up to 200kΩ. Used in precision analog trimming, sensor calibration, and programmable gain control circuits.

For engineers reviewing the X9241AYSI datasheet, X9241AYSI pinout, X9241AYSI application, or X9241AYSI equivalent, key selection considerations include its 2kΩ per-pot end-to-end resistance, 100-year nonvolatile data retention, 100,000-cycle register endurance, wiper current rating of ±4mA, and support for global register transfers across all four channels.

Technical Context

The X9241AYSI implements four independent 63-segment resistor arrays with decoded 6-bit Wiper Counter Registers (WCR), each backed by four nonvolatile Data Registers (DR0–DR3). Each array operates as a three-terminal potentiometer or two-terminal variable resistor, with terminal voltage limits of -3.0V to +5V and absolute linearity error of ±1 MI.

It uses a standard 2-wire serial interface with slave address format 0101[A3:A0], supports ACK polling during nonvolatile writes (tWR = 10ms), and enables fine-grained wiper adjustment via increment/decrement command with SCL-synchronized step control. Cascade mode is controlled by bit 7 (CM) of the WCR, requiring external inter-array connections between VL/RL and VH/RH terminals.

Key Specifications

Pinout & Package

Package: 20-lead SOIC (RoHS-compliant, Pb-free matte tin finish), body dimensions 7.5mm × 12.8mm × 2.3mm (JEDEC MS-013).

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9241AYSI, AD5242BRUZ10 offers finer resolution but requires duplication for quad-channel coverage and lacks cascade flexibility, while MCP42010-I/P trades nonvolatility and I²C compatibility for SPI simplicity and lower unit cost-neither matches the integrated 2kΩ quad architecture with 100-year data retention.

Availability

X9241AYSI is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifiers, and laser diode bias control requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9241AYSI 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 conditioning in space-constrained, long-lifecycle industrial systems-emphasizing nonvolatile storage, cascade scalability, and robust I²C interoperability.

FAQ

What is the exact resistance value and tolerance of each potentiometer in the X9241AYSI?

The X9241AYSI contains four identical 2kΩ potentiometers, each with a tolerance of ±20% across the full operating temperature range (-40°C to +85°C). This value is fixed per ordering option and confirmed in the Ordering Information table on page 2 of FN8164 Rev 7.00. The 2kΩ value applies to all four channels (Pot 0–Pot 3) and enables matched performance in multi-channel trimming applications. No user configuration alters this nominal resistance.

Does the X9241AYSI support true I²C communication, and what are its timing limits?

Yes, the X9241AYSI supports standard I²C protocol with 7-bit slave address (0101xxxx) and full START/STOP/ACK handshake compliance. Its AC specifications define maximum SCL frequency as 100kHz, minimum tLOW = 4700ns, minimum tHIGH = 4000ns, and noise suppression time Ti = 20ns. These values are validated per Figure 10 and Table on page 12 of FN8164 Rev 7.00 and ensure interoperability with standard I²C masters.

How does nonvolatile storage work in the X9241AYSI, and which registers retain data?

The X9241AYSI stores wiper positions in four nonvolatile Data Registers (DR0–DR3) per potentiometer, totaling 16 bytes of EEPROM. Only DR0 is automatically loaded into the volatile Wiper Counter Register (WCR) on power-up. Writes to DR0–DR3 require explicit "Write Data Register" or "XFR WCR to Data Register" commands and incur a 10ms tWR delay. Data retention is guaranteed for 100 years per specification on page 11 of FN8164 Rev 7.00.

Can the X9241AYSI be used in cascade mode, and how is it configured?

Yes, the X9241AYSI supports cascading any two adjacent potentiometers (e.g., Pot 2 → Pot 3) by setting bit 7 (CM) of the higher-order WCR to "1". External wiring must connect VL/RL of the higher pot to VH/RH of the lower pot, and only one wiper may remain enabled (DW = 0). Cascaded arrays behave as a single extended resistor string; wiper movement crosses boundaries automatically during increment/decrement operations. Configuration details are in Section "Cascade Mode" on page 9 of FN8164 Rev 7.00.

What is the maximum allowable wiper current for the X9241AYSI, and under what conditions?

The X9241AYSI supports a maximum wiper current of ±4mA when used with 2kΩ resistor arrays, as specified in the Absolute Maximum Ratings table on page 10 of FN8164 Rev 7.00. This limit applies across the full -40°C to +85°C temperature range and assumes proper voltage compliance: VH/RH, VW/RW, and VL/RL must remain within -3.0V to +5V relative to VSS, and ΔV = |VH – VL| ≤ 10V. Exceeding ±4mA risks irreversible damage to internal FET switches.