Renesas X9409WV24IZ-2.7

Overview

X9409WV24IZ-2.7 from Intersil is a quad digitally controlled potentiometer (XDCP) IC implementing four independent 64-tap resistor arrays with volatile wiper counter registers and four nonvolatile data registers per channel. It operates from 2.7V to 5.5V, features 10kΩ end-to-end resistance, 50Ω typical wiper resistance at 5V, and supports 2-wire serial interface for wiper position control and nonvolatile storage-used in precision analog trimming, programmable gain control, and offset adjustment circuits.

For engineers reviewing the X9409WV24IZ-2.7 datasheet, X9409WV24IZ-2.7 pinout, X9409WV24IZ-2.7 application, or X9409WV24IZ-2.7 equivalent, this device delivers deterministic wiper positioning, power-on recall from DR0, hardware write protection via WP pin, and industrial temperature range support (–40°C to +85°C) in a RoHS-compliant 24-lead TSSOP package.

Technical Context

The X9409WV24IZ-2.7 integrates four monolithic CMOS resistor arrays, each composed of 63 discrete segments forming 64 tap points, with CMOS switches selecting wiper position under control of a 6-bit Wiper Counter Register (WCR). Each array has dedicated VH/RH, VL/RL, and VW/RW terminals, enabling three-terminal potentiometer or two-terminal variable resistor configurations.

Communication occurs over a bidirectional 2-wire bus (SCL/SDA) compliant with standard I²C timing (f_SCL ≤ 400 kHz), supporting read/write of WCR and DRs, global or per-pot transfers, and real-time increment/decrement operations. Hardware write protection (WP pin) disables nonvolatile writes, and device addressing uses A0–A3 inputs to support up to 16 devices on one bus.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm body width), RoHS-compliant, moisture sensitivity level (MSL) per Intersil TB363.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9409WV24IZ-2.7, AD5204BRUZ10 offers identical channel count and resistance but trades I²C simplicity for SPI flexibility and omits hardware write protection, while MCP42050-I/SL provides finer resolution in a smaller dual-channel format but lacks the nonvolatile recall and quad-channel density required for multi-parameter analog tuning.

Availability

X9409WV24IZ-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and audio equipment manufacturing requiring stable component supply and long-term obsolescence mitigation.

Supply support for X9409WV24IZ-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 (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for industrial, communications, and computing markets.

The X9409 product line was designed for high-reliability analog parameter adjustment in embedded systems-replacing mechanical potentiometers with nonvolatile, software-configurable resistance networks.

FAQ

What is the function of the WP pin on the X9409WV24IZ-2.7?

The WP (Write Protect) pin on the X9409WV24IZ-2.7 disables nonvolatile writes to the Data Registers when held low. This prevents accidental overwriting of calibrated wiper positions stored in DR0–DR3. When WP is high, nonvolatile store operations (e.g., transferring WCR to DR) are enabled. The pin does not affect volatile wiper updates via I²C commands.

Does the X9409WV24IZ-2.7 support true I²C communication?

Yes, the X9409WV24IZ-2.7 implements a standard 2-wire interface compatible with I²C protocol specifications: it responds to 7-bit slave addresses (0101xxxB), supports START/STOP conditions, ACK/NACK handshaking, and operates at up to 400 kHz clock frequency. Its SDA pin is open-drain and requires an external pull-up resistor, matching I²C electrical requirements.

How does power-on wiper recall work in the X9409WV24IZ-2.7?

On power-up, the X9409WV24IZ-2.7 automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR). This ensures the wiper assumes a known, factory- or field-programmed position immediately after VCC stabilizes-no host intervention is needed to restore operational settings.

Can the X9409WV24IZ-2.7 be used as a two-terminal variable resistor?

Yes, the X9409WV24IZ-2.7 supports two-terminal operation by connecting either VH/RH or VL/RL to circuit ground or common potential and using VW/RW as the adjustable terminal. In this mode, it functions as a digitally controlled rheostat with 10kΩ total resistance and 64-step resolution, suitable for current-limiting or bias-setting applications.

What is the maximum wiper current rating for the X9409WV24IZ-2.7?

The X9409WV24IZ-2.7 specifies a maximum wiper current (I_W) of ±3 mA per channel. Exceeding this limit risks localized heating, resistance drift, or long-term degradation of the CMOS switch network. For applications involving higher currents, external buffering (e.g., op-amp follower) is recommended to isolate the X9409WV24IZ-2.7 wiper node.