Renesas X9401WV24Z-2.7

Overview

X9401WV24Z-2.7 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 analog trimming in programmable gain amplifiers, voltage regulator feedback networks, and sensor calibration circuits.

For engineers reviewing the X9401WV24Z-2.7 datasheet, X9401WV24Z-2.7 pinout, X9401WV24Z-2.7 application, or X9401WV24Z-2.7 equivalent, this page delivers verified electrical specs, TSSOP-24 package mapping, nonvolatile register behavior, wiper response timing (≤10 µs), and real-world configuration examples - all confirmed against FN8190 Rev 5.00.

Technical Context

The X9401WV24Z-2.7 implements four independent resistor arrays (63 segments each), each controlled by a volatile 6-bit Wiper Counter Register (WCR) and backed by four 6-bit nonvolatile Data Registers (DR0–DR3). Its SPI interface supports full-duplex communication at up to 2 MHz with CS/SCK/SI/SO/HOLD/ WP pins and dual address inputs (A0/A1) enabling up to four devices on one bus.

Each potentiometer operates as either a three-terminal voltage divider or two-terminal variable resistor. Power-up loads DR0 into the WCR, while hardware write protection (WP pin) blocks nonvolatile writes. Wiper position updates occur in ≤10 µs for load instructions and ≤450 ns for increment/decrement commands.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42010-I/P, the X9401WV24Z-2.7 uniquely combines quad-channel SPI control, automatic DR0-to-WCR power-up recall, hardware write protection, and hold capability - making it optimal for robust, self-contained analog trimming in industrial and automotive systems where reliability and deterministic startup behavior are critical.

Availability

X9401WV24Z-2.7 is available at Aetrix Electronics and suitable for programmable gain amplifiers, voltage regulator feedback networks, sensor signal conditioning, comparator hysteresis tuning, and analog calibration circuits requiring stable component supply and long-term parameter retention.

Supply support for X9401WV24Z-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 leader in precision analog and power management ICs, delivering high-reliability solutions for industrial, infrastructure, and high-end consumer markets.

The X9401 series was designed specifically for replacing mechanical potentiometers in digitally reconfigurable analog signal paths - emphasizing nonvolatile storage, low power, and robust SPI interoperability in harsh environments.

FAQ

What is the minimum operating voltage for the X9401WV24Z-2.7?

The X9401WV24Z-2.7 operates down to 2.7 V, as specified in the Absolute Maximum Ratings table of FN8190 Rev 5.00. This allows direct integration with 3.3 V systems without level-shifting circuitry. Operation below 2.7 V may result in undefined behavior or failure to execute SPI commands reliably. The device maintains full functionality-including wiper positioning, register reads/writes, and nonvolatile storage-across the entire 2.7 V to 5.5 V range.

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

Yes - the X9401WV24Z-2.7 automatically loads the contents of Data Register 0 (DR0) into the Wiper Counter Register (WCR) on power-up, ensuring the last-saved wiper position is restored. This behavior is guaranteed by design and documented in the "Power-up" section of FN8190 Rev 5.00. To preserve a specific setting across power cycles, users must explicitly write that value to DR0 before shutdown, as the volatile WCR itself does not retain state.

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

Yes - the X9401WV24Z-2.7 supports both three-terminal potentiometer and two-terminal variable resistor configurations. In two-terminal mode, one end terminal (e.g., VLx) is tied to the wiper (VWx), leaving VHx and VWx as the effective variable resistance terminals. This is explicitly stated in the "Description" section of FN8190 Rev 5.00 and validated in Application Circuit diagrams on pages 16–17. The 10 kΩ RTOTAL and 150 Ω wiper resistance apply directly to this configuration.

What is the maximum SPI clock frequency supported by the X9401WV24Z-2.7?

The X9401WV24Z-2.7 supports SPI clock frequencies up to 2.0 MHz, as specified in the AC Timing table (page 13) of FN8190 Rev 5.00. This limit applies across the full operating temperature range (–40°C to +85°C) and supply range (2.7 V to 5.5 V). Exceeding 2 MHz may cause setup/hold violations or incomplete instruction decoding, leading to corrupted register writes or unpredictable wiper movement.

How does the HOLD pin function during an SPI transaction with the X9401WV24Z-2.7?

The HOLD pin pauses an ongoing SPI transaction without resetting the command sequence: it must be driven LOW while SCK is LOW to suspend communication, and returned HIGH (also while SCK is LOW) to resume. This feature is detailed in the "HOLD (HOLD)" section (page 3) of FN8190 Rev 5.00. It enables host processors to service higher-priority interrupts mid-transaction and guarantees bit-level continuity - unlike CS deassertion, which aborts the operation.