Renesas X9400YV24I-2.7

Overview

X9400YV24I-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, and operation from 2.7 V to 5.5 V. It integrates four independent resistor arrays with nonvolatile data registers (DR0–DR3), wiper counter registers (WCR), and hardware write protection (WP), enabling precise analog voltage/current control in programmable gain stages and sensor calibration circuits.

For engineers reviewing the X9400YV24I-2.7 datasheet, X9400YV24I-2.7 pinout, X9400YV24I-2.7 application, or X9400YV24I-2.7 equivalent, key selection criteria include its 2.7–5.5 V VCC range, ±5 V analog rail support (V+/V−), 1 µA standby current, 100-year data retention, and TSSOP-24 package compatibility with industrial temperature operation (−40°C to +85°C).

Technical Context

The X9400YV24I-2.7 implements four independent 63-segment resistor arrays, each controlled by a 6-bit volatile Wiper Counter Register decoded to select one of 64 tap points. Each array supports three-terminal potentiometer or two-terminal variable resistor configurations with VH/RH, VL/RL, and VW/RW terminals.

Its SPI interface operates at up to 2 MHz with CS, SCK, SI, and SO signals, plus HOLD for serial pause and A0/A1 for slave addressing (up to 4 devices on bus). Nonvolatile writes to DR0–DR3 require WP = HIGH and complete within 10 ms, while power-on recall loads DR0 into the corresponding WCR.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), RoHS-compliant, Pb-free plus anneal finish. Pin pitch: 0.65 mm. Moisture Sensitivity Level (MSL): meets Pb-free reflow requirements per IPC/JEDEC J-STD-020.

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 X9400YV24I-2.7 uniquely combines bipolar analog rail support (±5 V), hardware write protection, and four nonvolatile data registers per channel-making it the only option among the three that ensures robust, self-contained, field-updatable analog calibration in industrial environments.

Availability

X9400YV24I-2.7 is available at Aetrix Electronics and suitable for industrial process control, sensor calibration, programmable power supplies, and audio signal processing requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9400YV24I-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 company, now part of Renesas Electronics, with expertise in high-reliability industrial and infrastructure solutions.

The X9400 family was designed specifically for applications demanding nonvolatile, software-configurable analog resistance with industrial-grade reliability, low power, and robust SPI control-targeting programmable instrumentation, automated test equipment, and factory automation systems.

FAQ

What is the operating voltage range for the analog section of the X9400YV24I-2.7?

The X9400YV24I-2.7 supports analog supplies V+ from −2.7 V to +5.5 V and V− from −5.5 V to −2.7 V, enabling true bipolar operation across ±5 V rails. This allows use in AC-coupled audio, sensor front-ends with negative offsets, and industrial signal conditioning where dual-rail analog integrity is essential. The X9400YV24I-2.7 maintains specified performance across this full range when VCC is powered within its 2.7–5.5 V window.

How does the power-on wiper recall function work in the X9400YV24I-2.7?

On power-up, the X9400YV24I-2.7 automatically loads the contents of Data Register 0 (DR0) for each of the four potentiometers into their respective volatile Wiper Counter Registers (WCR). This ensures repeatable analog behavior without host intervention. The X9400YV24I-2.7 requires proper power sequencing-VCC first, then V+ and V−-and VCC must drop below 0.1 V for >1 second before restart to guarantee reliable DR0 recall.

Can the X9400YV24I-2.7 be used as a two-terminal variable resistor?

Yes, the X9400YV24I-2.7 supports two-terminal variable resistor operation by connecting either VH or VL to the wiper (VW) and using the remaining terminal as the adjustable node. Each of the four channels functions independently in this mode. The X9400YV24I-2.7's 40 Ω typical wiper resistance at 5 V and 63-segment architecture ensure low parasitic effects and predictable current handling up to ±6 mA per wiper.

What is the maximum SPI clock frequency supported by the X9400YV24I-2.7?

The X9400YV24I-2.7 supports SPI clock frequencies up to 2.0 MHz, with minimum high/low times of 200 ns each. Its timing parameters-including 50 ns setup/hold for SI/SCK, 100 ns SO valid time, and 500 ns clock cycle-are fully characterized across the industrial temperature range (−40°C to +85°C). This enables reliable communication with modern microcontrollers and FPGAs without additional timing margin constraints.

Does the X9400YV24I-2.7 require external components for basic operation?

No, the X9400YV24I-2.7 operates stand-alone with only decoupling capacitors recommended: 0.1 µF ceramic between VCC and VSS, and separate 0.1 µF caps between V+ and V−. No pull-up resistors, level shifters, or external memory are needed-the X9400YV24I-2.7 integrates all control logic, nonvolatile storage, and resistor arrays on-die. Hardware write protection (WP) and device addressing (A0/A1) are implemented with simple logic-level connections.