Renesas X9455YV24IZ-2.7

Overview

X9455YV24IZ-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 is used for precision bias voltage programming in analog front-ends and sensor signal conditioning circuits.

For engineers reviewing the X9455YV24IZ-2.7 datasheet, X9455YV24IZ-2.7 pinout, X9455YV24IZ-2.7 application, or X9455YV24IZ-2.7 equivalent, key selection considerations include its dual DCP architecture with independent dual-wiper control per channel, 0.4% resolution, 40 Ω typical wiper resistance, RoHS-compliant 24-lead TSSOP package, and power-on recall of DR0A0/DR0B0/DR1A0/DR1B0 register values.

Technical Context

The X9455YV24IZ-2.7 integrates two monolithic CMOS resistor arrays-each with 255 segments and two independently addressable wipers-enabling four-terminal potentiometer operation per DCP. Each wiper is controlled by an 8-bit volatile Wiper Counter Register (WCR), with four associated non-volatile Data Registers (DR0A0–DR0B3, DR1A0–DR1B3) that load into WCRs on power-up.

It supports two concurrent communication modes: a 2-wire (I²C-compatible) interface with slave address A2–A0 configuration and ACK polling for nonvolatile writes, and a dedicated Up/Down interface using CS, U/D, SCL, DS0, and DS1 for direct wiper stepping. Hardware write protection (WP) disables nonvolatile writes when asserted low.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm wide), Pb-free plus anneal (RoHS compliant), MDP0044 footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled potentiometer applications.

Compared with X9455YV24IZ-2.7, AD5242BRUZ10 offers simpler I²C integration but sacrifices dual-wiper flexibility and RoHS-compliant Pb-free packaging; MCP42010-I/SL provides SPI compatibility and smaller footprint but lacks non-volatile wiper recall and hardware write protection-increasing firmware complexity for robust calibration retention.

Availability

X9455YV24IZ-2.7 is available at Aetrix Electronics and suitable for programmable sensor biasing, window comparator calibration, and three-resistor network design requiring stable component supply across industrial temperature ranges (-40°C to +85°C).

Supply support for X9455YV24IZ-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) is a U.S.-based semiconductor company specializing in precision analog and power management ICs for industrial, computing, and communications markets.

The X9455 product line was designed specifically for replacing mechanical potentiometers in digitally calibrated analog systems-emphasizing non-volatile recall, dual-wiper flexibility, and dual-interface accessibility for embedded MCU integration.

FAQ

What is the total end-to-end resistance of the X9455YV24IZ-2.7?

The X9455YV24IZ-2.7 has a nominal end-to-end resistance of 2.8 kΩ, as specified in the Ordering Information table on page 2 of FN8202 Rev 1.00. This value applies to both integrated DCP channels (DCP0 and DCP1) and is measured between RHx and RLx terminals under recommended operating conditions. Tolerance is ±20%, and resistance matching between DCP0 and DCP1 is within 0.75–2.0%.

Does the X9455YV24IZ-2.7 support true dual-wiper operation per potentiometer?

Yes, the X9455YV24IZ-2.7 implements two independent digitally controlled potentiometers (DCP0 and DCP1), each with two physically separate wiper terminals (RW0A/RW0B and RW1A/RW1B). Each wiper is controlled by its own 8-bit volatile Wiper Counter Register and associated non-volatile Data Registers, enabling fully independent positioning-e.g., setting upper and lower thresholds in a window comparator using a single DCP.

How does the power-on recall function work in the X9455YV24IZ-2.7?

On power-up, the X9455YV24IZ-2.7 automatically loads the contents of DR0A0, DR0B0, DR1A0, and DR1B0-the Level 0 Data Registers-into their corresponding Wiper Counter Registers (WCR0A, WCR0B, WCR1A, WCR1B). This occurs after a 2 ms delay (t_D) once V_CC exceeds 2.7 V, ensuring stable supply before wiper initialization. The behavior is unconditional and requires no host intervention.

Can the X9455YV24IZ-2.7 be used with a 3.3 V microcontroller's I²C interface?

Yes, the X9455YV24IZ-2.7 supports 2-wire (I²C-compatible) operation at V_CC = 3.3 V. Its VIH threshold is V_CC × 0.7 (2.31 V min), and VIL is V_CC × 0.3 (0.99 V max), aligning with standard 3.3 V logic levels. SDA is open-drain with internal pull-down; an external 2.3 kΩ pull-up to V_CC is required per the test conditions on page 5.

What is the maximum allowable current through a wiper terminal of the X9455YV24IZ-2.7?

The absolute maximum wiper current for the X9455YV24IZ-2.7 is ±3.0 mA, as specified in the Analog Specifications table (page 4). Exceeding this limit risks localized heating, resistance drift, or accelerated wear of the internal switch matrix. For continuous operation, design wiper loads to stay within this rating-e.g., ensure minimum load resistance ≥ 933 Ω at 2.8 V across a 2.8 kΩ DCP.