Renesas X9455YV24I-2.7

Overview

X9455YV24I-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 24-pin TSSOP package. It integrates two independent resistor arrays, each with two volatile wiper counter registers and four non-volatile data registers, supporting both 2-wire serial and Up/Down interfaces for precision analog trimming in bias networks and programmable gain stages.

For engineers reviewing the X9455YV24I-2.7 datasheet, X9455YV24I-2.7 pinout, X9455YV24I-2.7 application, or X9455YV24I-2.7 equivalent, this device delivers deterministic wiper positioning, power-on recall of stored settings, hardware write protection, and sub-1% absolute linearity - critical for stable calibration in industrial sensor front-ends and programmable reference circuits.

Technical Context

The X9455YV24I-2.7 implements two independent 255-segment CMOS resistor arrays, each with dual wipers (RW0A/RW0B and RW1A/RW1B) controlled by dedicated 8-bit volatile Wiper Counter Registers (WCRs). Each WCR maps to four non-volatile Data Registers (DR0A0–DR1B3), enabling persistent storage and selective recall of wiper positions at power-up.

It supports dual interface modes: a 2-wire (I²C-compatible) bus with slave address A0–A2 configuration and ACK polling for nonvolatile writes, and an asynchronous Up/Down interface using CS, U/D, SCL, DS0, and DS1 for direct wiper stepping - with hardware write protection via the active-low WP pin.

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/SL, the X9455YV24I-2.7 uniquely delivers two independent DCPs each with two wipers, dual-interface flexibility (2-wire + Up/Down), and guaranteed power-on recall from nonvolatile memory - making it the only option for applications requiring concurrent, persistent, and hardware-protected analog trimming of multiple nodes.

Availability

X9455YV24I-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply monitoring, and embedded system reference voltage tuning requiring stable component supply across extended temperature ranges (-40°C to +85°C).

Supply support for X9455YV24I-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 (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for industrial, communications, and computing markets, with emphasis on precision, reliability, and low-power operation.

The X9455 product line targets programmable analog signal conditioning - specifically replacing mechanical potentiometers in calibration-critical systems where repeatability, temperature stability, and nonvolatile configuration retention are mandatory.

FAQ

What is the total end-to-end resistance of the X9455YV24I-2.7?

The X9455YV24I-2.7 has a nominal end-to-end resistance of 2.8 kΩ, as specified in the Analog Specifications table on page 4 of the FN8202 datasheet. This value applies to both integrated DCPs (DCP0 and DCP1) and is measured across RH–RL terminals. Tolerance is ±20%, and DCP-to-DCP matching is within 0.75–2.0% - critical for balanced dual-channel applications.

Does the X9455YV24I-2.7 support automatic recall of wiper positions after power-up?

Yes, the X9455YV24I-2.7 automatically loads the contents of DR0A0, DR0B0, DR1A0, and DR1B0 into their respective Wiper Counter Registers (WCR0A, WCR0B, WCR1A, WCR1B) upon power-up, completing within 2 ms. This behavior is guaranteed by design and requires no host intervention - a key differentiator for fail-safe analog calibration in unattended systems.

Can the X9455YV24I-2.7 be used with both I²C and discrete Up/Down control simultaneously?

No - the X9455YV24I-2.7 operates in mutually exclusive interface modes. When CS is LOW, the Up/Down interface is active and the 2-wire interface is disabled; when CS is HIGH, the 2-wire interface is enabled and Up/Down signals are ignored. This hardware-enforced separation prevents bus contention and simplifies system-level arbitration.

What is the maximum wiper current rating for the X9455YV24I-2.7?

The X9455YV24I-2.7 supports a maximum wiper current of ±3 mA per wiper terminal (RW0A, RW0B, RW1A, RW1B), as stated in the Analog Specifications table. Exceeding this limit risks degradation of wiper resistance or long-term endurance. For higher-current applications, external buffering or current-limiting resistors must be added.

How does hardware write protection work on the X9455YV24I-2.7?

The WP pin on the X9455YV24I-2.7 is an active-low hardware write protect. When WP is driven LOW, all nonvolatile write operations - including 2-wire "Write to DR" commands and Up/Down "Store" actions - are blocked. Volatile writes to WCRs remain functional, allowing runtime adjustment without risking stored calibration data.