Renesas X9455WV24-2.7

Overview

X9455WV24-2.7 from Intersil is a dual two-wiper digitally controlled potentiometer (XDCP™) with 256-tap resolution per wiper, 10 kΩ end-to-end resistance, and 2.7 V to 5.5 V supply operation. It integrates two independent resistor arrays-each with two volatile wiper counter registers and four non-volatile data registers-and supports both 2-wire serial and Up/Down interface control for precision analog trimming in bias networks and programmable gain stages.

For engineers reviewing the X9455WV24-2.7 datasheet, X9455WV24-2.7 pinout, X9455WV24-2.7 application, or X9455WV24-2.7 equivalent, this device delivers deterministic wiper positioning, power-up recall of stored settings, hardware write protection, and dual-wiper flexibility for four-terminal potentiometer configurations in industrial sensor conditioning and programmable reference circuits.

Technical Context

The X9455WV24-2.7 implements two monolithic CMOS resistor arrays, each with 255 discrete segments and dual independently addressable wipers (RW0A/RW0B and RW1A/RW1B). Each wiper position is controlled by an 8-bit volatile Wiper Counter Register (WCR), with four associated non-volatile Data Registers (DR0A0–DR1B3) enabling persistent storage and flexible register-level updates.

It supports concurrent interface modes: 2-wire (SCL/SDA, up to 400 kHz) with slave address A2–A0 configuration and Up/Down mode (CS/U/D/DS0/DS1) for direct incremental control. Power-on loads DR0A0/DR0B0/DR1A0/DR1B0 into respective WCRs, and WP pin enables hardware lockout of non-volatile writes.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm width), RoHS-compliant Pb-free plus anneal option available.

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 X9455WV24-2.7 uniquely combines dual two-wiper architecture, hardware write protection, and dual-interface support in a single 24-lead TSSOP-enabling self-contained, field-reconfigurable analog trimming without additional glue logic or firmware overhead.

Availability

X9455WV24-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable reference generation, precision instrumentation trimming, and automotive power monitoring requiring stable component supply and long-term parametric consistency.

Supply support for X9455WV24-2.7 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, aerospace, and communications markets.

The X9455 family was designed for high-reliability analog trimming in harsh environments-emphasizing non-volatile configurability, dual-channel independence, and robust interface options for embedded calibration systems.

FAQ

What is the total end-to-end resistance of the X9455WV24-2.7?

The X9455WV24-2.7 has a nominal end-to-end resistance (RTOTAL) of 10 kΩ, as specified in the Ordering Information table on page 2 of the FN8202 datasheet. This value is fixed for the 'W' version and applies to both DCP0 and DCP1 arrays. Tolerance is ±20%, and resistance matching between the two DCPs is 0.75% to 2.0%.

Does the X9455WV24-2.7 support power-up recall of wiper positions?

Yes, the X9455WV24-2.7 automatically loads the contents of DR0A0, DR0B0, DR1A0, and DR1B0 into their corresponding Wiper Counter Registers (WCR0A, WCR0B, WCR1A, WCR1B) at power-up. This occurs within 2 ms after VCC exceeds 2.7 V, ensuring repeatable startup behavior without host MCU intervention.

Can the X9455WV24-2.7 be used as a four-terminal potentiometer?

Yes, the X9455WV24-2.7 supports true four-terminal potentiometer operation per channel: RH0/RL0/RW0A/RW0B form one four-terminal network, and RH1/RL1/RW1A/RW1B form the second. This configuration eliminates wiper resistance error in precision biasing and Kelvin-sense applications.

What interfaces does the X9455WV24-2.7 support?

The X9455WV24-2.7 supports two independent digital interfaces: a 2-wire (I²C-compatible) interface using SCL/SDA/A0–A2/CS, and an Up/Down interface using CS/U/D/DS0/DS1. Both can be used concurrently-2-wire for configuration and Up/Down for real-time adjustment-but CS must be high for 2-wire operation.

Is hardware write protection available on the X9455WV24-2.7?

Yes, the WP (Write Protect) pin on the X9455WV24-2.7 provides hardware-level disable of all non-volatile write operations. When WP is driven low, both 2-wire non-volatile writes and Up/Down "Store" commands are blocked-even if CS and SCL are active-ensuring immunity to spurious writes during power transitions or firmware faults.