Renesas X9400YS24I-2.7

Overview

X9400YS24I-2.7 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 64-tap resolution per channel, SPI serial interface, 10 kΩ end-to-end resistance, ±20% tolerance, and 2.7V to 5.5V system supply operation. It integrates four independent resistor arrays for precision analog trimming in audio gain control, sensor calibration, and programmable power supply feedback loops.

For engineers reviewing the X9400YS24I-2.7 datasheet, X9400YS24I-2.7 pinout, X9400YS24I-2.7 application, or X9400YS24I-2.7 equivalent, key selection criteria include wiper resistance (40 Ω typ. at 5 V), nonvolatile data register endurance (100,000 cycles), power-on recall behavior, and dual-supply analog range (±5.5 V).

Technical Context

The X9400YS24I-2.7 implements four independent 63-segment resistor arrays with CMOS switch-controlled wipers, each driven by a volatile 6-bit Wiper Counter Register (WCR) and backed by four 6-bit nonvolatile Data Registers (DR0–DR3). Its SPI interface supports read/write/transfer operations with device addressing via A0/A1 pins and hardware write protection via WP.

It operates with analog supplies V+ and V− ranging from –5.5 V to +5.5 V while maintaining digital logic compatibility across 2.7 V to 5.5 V VCC, enabling use in bipolar signal conditioning circuits without level-shifting. Power-up automatically loads DR0 into each WCR, ensuring deterministic startup wiper positions.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300 mil), RoHS-compliant Pb-free plus anneal finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/SL, the X9400YS24I-2.7 uniquely supports true bipolar analog operation (±5.5 V) with isolated V+/V− supplies, making it the only option among the three for precision instrumentation, audio, and industrial signal conditioning requiring split-rail compatibility.

Availability

X9400YS24I-2.7 is available at Aetrix Electronics and suitable for audio signal conditioning, sensor calibration, programmable power supply feedback, and comparator hysteresis tuning requiring stable component supply across industrial temperature ranges.

Supply support for X9400YS24I-2.7 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 precision analog and power management semiconductor provider, now part of Renesas Electronics, with expertise in high-reliability industrial and infrastructure solutions.

The X9400 family was designed for digitally programmable analog trimming in systems requiring nonvolatile calibration storage, low-noise performance, and robust SPI-controlled adjustment-targeting test equipment, medical devices, and industrial control.

FAQ

What is the absolute maximum analog voltage range supported by the X9400YS24I-2.7?

The X9400YS24I-2.7 supports V+ up to +5.5 V and V− down to –5.5 V relative to VSS, enabling a total analog swing of 11 V across the resistor arrays. This allows direct use in bipolar op-amp circuits, such as active filters and instrumentation amplifiers, without external level-shifting components. Exceeding these limits risks permanent damage per Absolute Maximum Ratings.

Does the X9400YS24I-2.7 retain wiper settings after power cycling?

Yes-the X9400YS24I-2.7 automatically loads the contents of Data Register 0 (DR0) into each Wiper Counter Register (WCR) on power-up, ensuring repeatable startup positions. DR0 is nonvolatile and retains data for 100 years. To update the power-on default, write the desired value to DR0 and confirm completion via the Write-In-Process (WIP) bit before power-down.

Can the X9400YS24I-2.7 be used as a two-terminal variable resistor?

Yes-the X9400YS24I-2.7 supports both three-terminal potentiometer (VH–VW–VL) and two-terminal variable resistor (VH–VW or VW–VL) configurations. In two-terminal mode, it functions as a digitally adjustable resistance element, ideal for gain-setting in transimpedance amplifiers or current-limiting in LED drivers. Wiper resistance (40 Ω typ.) must be included in total resistance calculations.

How does hardware write protection (WP pin) affect nonvolatile operations on the X9400YS24I-2.7?

When the WP pin is held LOW, the X9400YS24I-2.7 blocks all nonvolatile writes to its Data Registers (DR0–DR3), including XFR and Write Data Register instructions. Volatile operations-such as writing to Wiper Counter Registers or reading registers-remain fully functional. This prevents accidental overwrites of factory-calibrated settings during field updates or debug sessions.

What SPI clock frequency is supported by the X9400YS24I-2.7?

The X9400YS24I-2.7 supports SPI clock frequencies up to 2.0 MHz, with minimum high/low times of 200 ns each. At this rate, instruction execution (e.g., Read WCR) completes in under 10 µs, and nonvolatile writes take 5–10 ms. For reliable operation, ensure setup/hold times (50 ns) and noise suppression (20 ns TI) are met, especially in electrically noisy industrial environments.