Renesas X9455YV24-2.7

Overview

X9455YV24-2.7 from Intersil is a dual two-wiper digitally controlled potentiometer (XDCP™) with 256-tap resolution, 2.8 kΩ end-to-end resistance, and 2-wire/Up-Down interface support. It operates from 2.7 V to 5.5 V, features non-volatile wiper position storage, and delivers ±0.4% resolution for precision biasing in analog signal conditioning circuits.

For engineers reviewing the X9455YV24-2.7 datasheet, X9455YV24-2.7 pinout, X9455YV24-2.7 application, or X9455YV24-2.7 equivalent, key selection criteria include its dual DCP architecture with independent dual-wiper control per channel, 24-pin TSSOP package, 100-year data retention, and hardware write-protect (WP) functionality for robust field calibration.

Technical Context

The X9455YV24-2.7 integrates two monolithic CMOS resistor arrays-each with 255 segments and two independently addressable wipers-enabling four-terminal programmable networks. Each wiper is controlled by an 8-bit volatile Wiper Counter Register (WCR), backed by four non-volatile Data Registers (DR0A0–DR1B3) for persistent configuration.

It supports dual interface modes: a 2-wire (I²C-compatible) bus with slave address A0–A2 pins and ACK polling, and an Up/Down interface using CS, U/D, SCL, DS0/DS1 for direct wiper stepping. Power-up automatically loads DR0A0/DR0B0/DR1A0/DR1B0 into respective WCRs, ensuring deterministic startup behavior.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), 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/P, the X9455YV24-2.7 uniquely combines dual two-wiper topology, 2.8 kΩ low-resistance value for higher current drive, and automatic power-up recall-making it optimal for self-contained analog trimming where minimal MCU intervention is required.

Availability

X9455YV24-2.7 is available at Aetrix Electronics and suitable for programmable bias networks, window comparator thresholds, and three-resistor programmable networks requiring stable component supply and long-term calibration integrity.

Supply support for X9455YV24-2.7 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 X9455YV24-2.7 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in automated calibration, sensor signal conditioning, and adaptive analog circuitry.

FAQ

What is the total end-to-end resistance of the X9455YV24-2.7?

The X9455YV24-2.7 has a nominal end-to-end resistance of 2.8 kΩ, as specified in the ordering information table and confirmed in the Analog Specifications section (RTOTAL = 2.8 kΩ for Y version). This value is tightly controlled with ±20% tolerance and matches across both DCP channels within 0.75–2.0%, enabling accurate ratiometric applications.

Does the X9455YV24-2.7 support automatic wiper position recall after power-up?

Yes, the X9455YV24-2.7 automatically loads the contents of non-volatile Data Registers DR0A0, DR0B0, DR1A0, and DR1B0 into their corresponding volatile Wiper Counter Registers (WCR0A, WCR0B, WCR1A, WCR1B) upon power-up. This occurs within 2 ms after VCC exceeds 2.7 V, ensuring deterministic startup behavior without host intervention.

Can the X9455YV24-2.7 be used with both I²C and discrete GPIO interfaces?

Yes, the X9455YV24-2.7 supports two independent control interfaces: a standard 2-wire (I²C-compatible) interface using SCL/SDA/A0–A2/CS, and an Up/Down interface using CS/U/D/SCL/DS0/DS1. The interfaces are mutually exclusive-CS low enables Up/Down mode and disables 2-wire communication, and vice versa.

What is the maximum wiper current rating for the X9455YV24-2.7?

The X9455YV24-2.7 specifies a maximum wiper current of ±3 mA per wiper terminal (IW = ±3 mA), as stated in the Analog Specifications table. Exceeding this limit may cause irreversible resistance drift or wiper contact degradation, especially under continuous DC load conditions.

How does the hardware write-protect (WP) pin function on the X9455YV24-2.7?

When the WP pin is driven LOW, the X9455YV24-2.7 disables all non-volatile write operations-including 2-wire "Write to DR" commands and Up/Down "Store" actions-while allowing volatile WCR updates and reads. This prevents unintended calibration changes during normal system operation or field maintenance.