Renesas X9455TV24-2.7

Overview

X9455TV24-2.7 from Intersil (now Renesas) is a dual two-wiper digitally controlled potentiometer (XDCP™) with 256-tap resolution per wiper, 100 kΩ end-to-end resistance, and operation from 2.7 V to 5.5 V. 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 programmable bias networks.

For engineers reviewing the X9455TV24-2.7 datasheet, X9455TV24-2.7 pinout, X9455TV24-2.7 application, or X9455TV24-2.7 equivalent, key selection considerations include its dual-DCP architecture with dual wipers per channel, non-volatile wiper position storage, 24-pin TSSOP package, 0.4% resolution, and support for both volatile adjustment and persistent recall at power-up.

Technical Context

The X9455TV24-2.7 implements two independent digitally controlled potentiometers (DCP0 and DCP1), each with two wiper terminals (A/B) and 255 resistive elements in series, enabling four-terminal potentiometer configurations. Each wiper position is controlled by an 8-bit volatile Wiper Counter Register (WCR), with four associated non-volatile Data Registers (DR0A0–DR1B3) for persistent storage.

It supports two concurrent communication modes: a 2-wire (I²C-compatible) interface with slave address A2–A0 configuration and hardware write protection (WP), plus an asynchronous Up/Down interface using CS, U/D, SCL, DS0, and DS1 for direct wiper stepping. Power-on recall loads DR0A0/DR0B0/DR1A0/DR1B0 into respective WCRs within 2 ms.

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 AD5242BRUZ100 and MCP42100-E/SL, the X9455TV24-2.7 uniquely delivers dual two-wiper functionality with non-volatile storage and dual-interface support-enabling self-contained, field-reconfigurable analog networks without host intervention after power-up.

Availability

X9455TV24-2.7 is available at Aetrix Electronics and suitable for programmable bias networks, window comparator calibration, three-resistor programmable networks, and audio channel gain control requiring stable component supply and long-term calibration retention.

Supply support for X9455TV24-2.7 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 (acquired by Renesas Electronics in 2017) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X9455TV24-2.7 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in systems requiring programmable, repeatable, and non-volatile analog tuning.

FAQ

What is the total end-to-end resistance of the X9455TV24-2.7?

The X9455TV24-2.7 has a nominal end-to-end resistance of 100 kΩ, as indicated by the "T" suffix in the part number per the Ordering Information table. This value is specified with ±20% tolerance and applies to both DCP0 and DCP1 arrays. The resistance remains stable across temperature with a ratiometric temperature coefficient of ±20 ppm/°C.

Does the X9455TV24-2.7 support non-volatile storage of wiper positions?

Yes, the X9455TV24-2.7 supports non-volatile storage via four Data Registers (DR) per wiper-DR0A0–DR0B3 and DR1A0–DR1B3. On power-up, the default Level 0 registers (DR0A0, DR0B0, DR1A0, DR1B0) are automatically loaded into their corresponding Wiper Counter Registers (WCRs), ensuring repeatable startup behavior without host initialization.

Can the X9455TV24-2.7 be used with both I²C and discrete Up/Down control simultaneously?

No-simultaneous use is not permitted. When the Chip Select (CS) pin is low, the 2-wire interface is disabled and only the Up/Down interface is active. When CS is high, the Up/Down interface is disabled and only the 2-wire interface responds. This hardware interlock prevents bus contention and ensures deterministic control mode selection.

What is the maximum wiper current rating for the X9455TV24-2.7?

The X9455TV24-2.7 specifies a maximum wiper current of ±3 mA per wiper terminal (RW0A, RW0B, RW1A, RW1B). Exceeding this limit may cause irreversible resistance drift or wiper contact degradation. The 40 Ω typical wiper resistance contributes to voltage drop under load but remains within specification up to the 3 mA limit.

Is the X9455TV24-2.7 pin-compatible with other members of the X9455 family?

Yes-the X9455TV24-2.7 shares the identical 24-lead TSSOP footprint and pinout with all X9455 variants (e.g., X9455UV24I-2.7, X9455WV24I-2.7), differing only in total resistance value (100 kΩ vs. 50 kΩ vs. 10 kΩ) and marking. This allows drop-in substitution in layouts designed for the X9455 family, provided the resistance value meets circuit requirements.