Renesas X9401WV24Z-2.7T1

Overview

X9401WV24Z-2.7T1 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 64-tap resolution per channel, 10 kΩ end-to-end resistance, SPI serial interface, and 2.7 V to 5.5 V supply operation. It integrates four independent resistor arrays with volatile wiper counter registers and four nonvolatile data registers per pot, enabling precise analog voltage/current adjustment in programmable power supplies and sensor calibration circuits.

For engineers reviewing the X9401WV24Z-2.7T1 datasheet, X9401WV24Z-2.7T1 pinout, X9401WV24Z-2.7T1 application, or X9401WV24Z-2.7T1 equivalent, this device supports SPI-based wiper positioning, hardware write protection (WP), hold functionality (HOLD), and dual-package compatibility (24-lead TSSOP) - critical for space-constrained industrial control and embedded instrumentation designs.

Technical Context

The X9401WV24Z-2.7T1 implements four independent 63-segment resistor arrays, each controlled by a 6-bit Wiper Counter Register (WCR) decoded to select one of 64 tap points. Each array features VH/RH and VL/RL terminals plus a CMOS-switched VW/RW wiper output, supporting both three-terminal potentiometer and two-terminal variable resistor configurations.

Its SPI interface complies with standard serial clock (SCK), chip select (CS), serial input (SI), and serial output (SO) timing, with support for device addressing via A0/A1 pins, hardware write protection (WP), and communication pause via HOLD. Nonvolatile storage enables 100-year data retention and automatic power-up recall from DR0 to WCR.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), RoHS-compliant, Pb-free (MDP0044 drawing).

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9401WV24Z-2.7T1, AD5204BRUZ10 offers higher resolution but no hardware write protection, while MCP42010-I/SL provides lower quiescent current and dual-channel integration at the cost of reduced channel count and incompatible pinout - making X9401WV24Z-2.7T1 optimal for space-constrained quad-channel calibration requiring robust nonvolatile write control.

Availability

X9401WV24Z-2.7T1 is available at Aetrix Electronics and suitable for programmable power supplies, multi-sensor signal conditioning, and audio control systems requiring stable component supply, long-term data retention, and industrial temperature operation (-40°C to +85°C).

Supply support for X9401WV24Z-2.7T1 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 provider of precision analog and power management ICs, now part of Renesas Electronics, with expertise in high-reliability industrial and infrastructure solutions.

The X9401 product line was designed for digitally programmable analog adjustment in embedded systems - targeting applications where mechanical potentiometers introduce reliability, calibration drift, or serviceability issues.

FAQ

What is the supply voltage range supported by the X9401WV24Z-2.7T1?

The X9401WV24Z-2.7T1 operates from 2.7 V to 5.5 V, making it compatible with both 3.3 V and 5 V logic systems. This range is explicitly defined in the Absolute Maximum Ratings table and validated across the full industrial temperature range (-40°C to +85°C). Operation below 2.7 V may result in unreliable SPI communication or incomplete wiper positioning.

How does the hardware write protect (WP) pin function on the X9401WV24Z-2.7T1?

When the WP pin is driven LOW, the X9401WV24Z-2.7T1 blocks all nonvolatile write operations to its wiper counter registers and data registers - preventing accidental EEPROM corruption during firmware updates or debug sessions. The WP pin has no effect on volatile wiper adjustments or SPI read operations, and must be held HIGH to enable store instructions like Write Data Register or XFR to Data Register.

Can the X9401WV24Z-2.7T1 be used as a two-terminal variable resistor?

Yes, the X9401WV24Z-2.7T1 supports two-terminal variable resistor configuration by connecting either VH or VL to VW (wiper) and using the remaining terminal as the second connection point. This mode is explicitly documented in the Applications Information section and leverages the same 64-tap resolution and nonvolatile storage as the three-terminal potentiometer mode.

What is the maximum SPI clock frequency for the X9401WV24Z-2.7T1?

The X9401WV24Z-2.7T1 supports a maximum SPI clock frequency of 2.0 MHz, as specified in the AC Timing table. This limit applies to all instruction types including Read/Write Wiper Counter Register, Data Register transfers, and Increment/Decrement operations. Exceeding 2 MHz may cause setup/hold violations or incorrect data latching on SI/SO lines.

Does the X9401WV24Z-2.7T1 retain wiper position after power cycling?

The X9401WV24Z-2.7T1 loads the contents of Data Register 0 (DR0) into its volatile Wiper Counter Register (WCR) upon power-up. Therefore, wiper position is retained only if the desired setting was previously stored in DR0 via a nonvolatile write operation. The device does not automatically save the last wiper position - explicit firmware action is required to preserve state across power cycles.