Renesas X9400YP24

Overview

X9400YP24 from Intersil is a quad digitally controlled potentiometer (XDCP™) integrating four 64-tap resistor arrays with SPI interface, nonvolatile data registers, and power-on wiper recall. It operates from 2.7V to 5.5V VCC, supports ±5V analog rails, delivers 40Ω typical wiper resistance at 5V, and provides 10kΩ or 2.5kΩ end-to-end resistance options for precision analog control in embedded signal conditioning circuits.

For engineers reviewing the X9400YP24 datasheet, X9400YP24 pinout, X9400YP24 application, or X9400YP24 equivalent, this device serves as a drop-in replacement for mechanical potentiometers in voltage divider, gain-setting, offset adjustment, and programmable filter designs requiring stable digital calibration and long-term setting retention without external EEPROM.

Technical Context

The X9400YP24 implements four independent 63-segment resistor arrays with CMOS switch-controlled wipers, each managed by a volatile 6-bit Wiper Counter Register (WCR) and four nonvolatile 6-bit Data Registers (DR0–DR3). Wiper position is updated via SPI write, transfer, or real-time increment/decrement commands with ≤10μs response time after instruction completion.

Its SPI interface complies with standard mode-0 timing (CPOL=0, CPHA=0), supports up to 2MHz clock frequency, includes hardware write protection (WP), dual device addressing (A0/A1), and HOLD pin for serial bus pause/resume-enabling robust multi-device daisy-chaining in space-constrained industrial control systems.

Key Specifications

Pinout & Package

24-pin SOIC package (300 mil body, M24.3 drawing), 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 AD5204BRZ10 and MCP42050-I/P, the X9400YP24 uniquely supports true bipolar analog operation (±5.5V rails), integrates hardware write protection and HOLD functionality for robust industrial SPI communication, and offers dual resistance options (10kΩ/2.5kΩ) for optimized noise and power trade-offs in precision analog stages.

Availability

X9400YP24 is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical instrumentation front-ends, and programmable test equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for X9400YP24 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 company, now part of Renesas Electronics, with expertise in high-reliability mixed-signal ICs for industrial and infrastructure markets.

The X9400 family was designed specifically for replacing mechanical potentiometers in digitally calibrated analog signal chains-emphasizing nonvolatile setting retention, low wiper resistance, and robust SPI control under extended temperature and voltage stress conditions.

FAQ

What is the maximum SPI clock frequency supported by the X9400YP24?

The X9400YP24 supports SPI clock frequencies up to 2.0 MHz under standard operating conditions. This timing aligns with common microcontroller SPI peripherals and ensures reliable communication while maintaining 50 ns minimum setup and hold times for SI, SCK, CS, and HOLD inputs. The device uses mode-0 (CPOL=0, CPHA=0) SPI framing, and all timing parameters are specified with 10 ns input rise/fall times and 10 pF load capacitance.

Does the X9400YP24 support bipolar analog signal operation?

Yes, the X9400YP24 supports true bipolar analog operation via dedicated V+ and V− pins rated from −5.5V to +5.5V. This allows the four integrated potentiometers to function across full ±5V signal ranges-unlike single-supply digital pots-making it suitable for AC-coupled audio, sensor signal conditioning, and industrial process control where negative reference voltages are required. The VH/VL/VW pins operate within this extended analog domain independently of the 2.7V–5.5V digital VCC supply.

How does power-on wiper recall work in the X9400YP24?

On power-up, the X9400YP24 automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR), restoring the last-saved wiper position. This recall occurs only after VCC, V+, and V− all reach stable final values-requiring proper power sequencing (VCC first, then analog rails) and a clean VCC ramp rate (0.2–50 V/msec). Glitches or insufficient VCC hold-down (<0.1V for >1 second) before restart will prevent correct DR0 restoration.

Can the X9400YP24 be used as a two-terminal variable resistor?

Yes, the X9400YP24 can be configured as a two-terminal variable resistor by connecting either VH or VL to the desired reference (e.g., ground or supply) and using VW as the adjustable terminal-effectively creating a digitally tunable current-limiting or bias-setting element. Each potentiometer's 63-resistor array and low 40Ω typical wiper resistance at 5V minimize series impedance error, supporting accurate current control in LED drivers, sensor excitation, and programmable load applications.

What is the endurance rating for nonvolatile writes to the X9400YP24 data registers?

The X9400YP24 guarantees 100,000 data changes per bit per register for its four nonvolatile Data Registers (DR0–DR3). Each write to a DR initiates an internal high-voltage programming cycle requiring up to 10 ms to complete, during which the Write-In-Process (WIP) bit remains asserted. This endurance rating ensures reliable field recalibration over the full product lifecycle-even in applications requiring periodic firmware-based calibration updates-without degradation of stored wiper positions or system parameters.