Renesas X9401WV24IZ-2.7T1

Overview

X9401WV24IZ-2.7T1 from Intersil is a quad-channel, 64-tap digitally controlled potentiometer (XDCP™) with SPI interface, 10 kΩ end-to-end resistance, 150 Ω typical wiper resistance, and 2.7 V to 5.5 V supply operation - used for precision voltage division and programmable gain control in analog signal conditioning circuits.

For engineers reviewing the X9401WV24IZ-2.7T1 datasheet, X9401WV24IZ-2.7T1 pinout, X9401WV24IZ-2.7T1 application, or X9401WV24IZ-2.7T1 equivalent, this page delivers verified specifications, TSSOP-24 package mapping, wiper register behavior, nonvolatile data register architecture, and real-world use cases in power supply trimming and sensor calibration.

Technical Context

The X9401WV24IZ-2.7T1 implements four independent 63-segment resistor arrays with CMOS-switched wipers controlled by volatile 6-bit Wiper Counter Registers (WCRs), each backed by four nonvolatile 6-bit Data Registers (DR0–DR3). Power-up automatically loads DR0 into the corresponding WCR.

It supports full SPI protocol compliance (mode 0,0), including read/write of WCRs and DRs, global transfer between registers, and hardware-controlled increment/decrement via SI during active SCK cycles - all with write protection enabled by the WP pin and bus arbitration via A0/A1 address inputs.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), RoHS-compliant, Pb-free (MDP0044 drawing), rated for industrial temperature range (-40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42010-I/SL, the X9401WV24IZ-2.7T1 uniquely combines quad-channel count, SPI+HOLD+WP support, and four nonvolatile registers per channel - making it optimal for industrial systems requiring robust, field-updatable analog calibration with minimal MCU resource usage.

Availability

X9401WV24IZ-2.7T1 is available at Aetrix Electronics and suitable for power supply trimming, sensor signal conditioning, audio balance control, and comparator hysteresis adjustment requiring stable component supply and long-term calibration integrity.

Supply support for X9401WV24IZ-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 leading provider of precision analog and power management ICs, now part of Renesas Electronics, with deep expertise in configurable analog interfaces and high-reliability mixed-signal solutions.

The X9401 product line was designed for embedded systems requiring programmable analog functions - specifically targeting factory-calibrated instrumentation, industrial control loops, and adaptive sensor interfaces where nonvolatile parameter storage and SPI simplicity are critical.

FAQ

What is the minimum V_CC required for reliable operation of the X9401WV24IZ-2.7T1?

The X9401WV24IZ-2.7T1 is specified for operation from 2.7 V to 5.5 V. Below 2.7 V, internal logic may fail to decode SPI commands correctly, and wiper register updates become unreliable. The "-2.7" suffix explicitly denotes this lower-voltage variant - distinct from the standard 5 V-only X9401WS series. Always maintain V_CC ≥ VH/VL/VW to prevent latch-up.

How does the X9401WV24IZ-2.7T1 retain wiper position after power cycling?

The X9401WV24IZ-2.7T1 loads the contents of Data Register 0 (DR0) into each Wiper Counter Register (WCR) on power-up. Since DR0 is nonvolatile EEPROM, its value persists across power cycles. To preserve a specific wiper position, the host must first write that value to DR0 using the Write Data Register instruction, then issue Global XFR DR0 to WCR - ensuring repeatable startup behavior for the X9401WV24IZ-2.7T1.

Can the X9401WV24IZ-2.7T1 be used as a two-terminal variable resistor?

Yes - the X9401WV24IZ-2.7T1 supports both three-terminal potentiometer and two-terminal variable resistor configurations. For two-terminal use, connect either VH or VL to VW (wiper), leaving the other end open or tied to a fixed potential. This configuration maintains full 64-tap resolution and leverages the same 10 kΩ R_TOTAL and 150 Ω wiper resistance specs as the three-terminal mode.

What is the function of the HOLD pin on the X9401WV24IZ-2.7T1?

The HOLD pin on the X9401WV24IZ-2.7T1 pauses ongoing SPI communication without resetting the command state. When brought LOW while SCK is LOW, it freezes the serial interface mid-sequence; bringing HOLD HIGH (with SCK still LOW) resumes exactly where it left off. This enables deterministic timing control in multi-master systems or when MCU interrupts require temporary bus suspension - a feature absent in most competing digital potentiometers.

Is the X9401WV24IZ-2.7T1 RoHS-compliant and lead-free?

Yes - the X9401WV24IZ-2.7T1 uses a Pb-free material set with 100% matte tin (e3) termination finish, fully compliant with RoHS Directive 2011/65/EU. Its MDP0044 TSSOP package meets IPC/JEDEC J-STD-020 reflow requirements for lead-free soldering, including peak temperatures up to 260°C. The "IZ" suffix explicitly denotes the RoHS-compliant, lead-free version of the X9401WV24 series.