Renesas X9408WV24I

Overview

X9408WV24I from Intersil is a quad digitally controlled potentiometer (XDCP™) IC with 2-wire I²C-compatible interface, 10kΩ end-to-end resistance per channel, -40°C to +85°C industrial temperature range, and TSSOP-24 package. It implements four independent 64-tap resistor arrays for precision analog control in signal conditioning, bias adjustment, and gain calibration circuits.

For engineers reviewing the X9408WV24I datasheet, X9408WV24I pinout, X9408WV24I application, or X9408WV24I equivalent, this device supports nonvolatile wiper position storage, hardware write protection (WP), dual ±2.7V to ±5.5V analog supplies (V+/V−), and volatile Wiper Counter Register (WCR) loading from DR0 at power-up - critical for repeatable analog initialization in embedded systems.

Technical Context

The X9408WV24I integrates four monolithic CMOS resistor arrays, each with 63 discrete segments and 64 tap points controlled by a 6-bit Wiper Counter Register (WCR). Each array features dedicated VH/RH, VL/RL, and VW/RW terminals, enabling three-terminal potentiometer or two-terminal variable resistor configurations.

It uses a 2-wire serial interface with slave address format 0101[A3:A0], supports ACK polling during nonvolatile writes (tWR = 5–10 ms), and provides four nonvolatile 6-bit Data Registers per potentiometer for storing wiper positions or system parameters - with 100,000 endurance cycles and 100-year data retention.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm width), RoHS-compliant, Pb-free matte tin finish (e3 termination).

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 X9408WV24I uniquely delivers 64-tap resolution with true ±5.5V analog operation and hardware write protection - making it the only option among the three for robust, field-calibratable bipolar analog control in industrial and medical systems.

Availability

X9408WV24I is available at Aetrix Electronics and suitable for audio signal conditioning, sensor bias calibration, programmable power supply feedback, and medical instrument gain scaling requiring stable component supply and long-term obsolescence management.

Supply support for X9408WV24I 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 manufacturer specializing in precision analog, power management, and interface ICs for industrial, aerospace, and medical applications.

The X9408 product line delivers digitally controlled potentiometers optimized for high-reliability analog trimming in harsh environments - emphasizing nonvolatile storage, bipolar operation, and I²C compatibility for embedded system integration.

FAQ

What is the operating temperature range for X9408WV24I?

The X9408WV24I is rated for industrial operation from −40°C to +85°C. This range is confirmed in the Ordering Information table of FN8191 Rev.4.00, where "X9408WV24I*" explicitly lists "−40 to +85" under TEMP RANGE. The device maintains specified performance including wiper resistance, linearity, and nonvolatile write timing across this full range.

Does X9408WV24I support true bipolar analog operation?

Yes, X9408WV24I supports true bipolar analog operation via dedicated V+ and V− pins, rated from −5.5V to −2.7V and +2.7V to +5.5V respectively. This allows the resistor arrays to handle signals spanning ±5.5V without clipping - a capability verified in the Absolute Maximum Ratings and Analog Specifications sections of the datasheet, distinguishing it from unipolar DCPs.

How does the hardware write protect (WP) pin function on X9408WV24I?

The WP pin on X9408WV24I is a low-active input that disables all nonvolatile writes to the Data Registers when pulled low. When WP = low, commands like Write Data Register or XFR WCR to DR are ignored - preventing accidental overwrites during system operation. This behavior is documented in the Pin Descriptions section and confirmed in Figure 1's functional block diagram.

What is the wiper resistance specification for X9408WV24I at ±5V analog supplies?

X9408WV24I specifies a typical wiper resistance of 40Ω at ±5V analog supplies (V+ = +5V, V− = −5V), with a maximum of 100Ω. This value is measured under the condition "IW = (VH − VL)/RTOTAL" and appears in the Analog Specifications table on page 11 of FN8191 Rev.4.00 - directly impacting insertion loss in precision voltage divider applications.

Can X9408WV24I be used as a two-terminal variable resistor?

Yes, X9408WV24I can be configured as a two-terminal variable resistor by connecting either VH/RH or VL/RL to VW/RW and using the remaining terminal with the wiper. The datasheet explicitly states this capability in the Description section: "The XDCP can be used as a three-terminal potentiometer or as a two terminal variable resistor in a wide variety of applications."