Renesas X9259UV24I-2.7T1

Overview

X9259UV24I-2.7T1 from Renesas (formerly Intersil) is a quad digitally controlled potentiometer (XDCP™) IC implementing four independent 256-tap, 50kΩ end-to-end resistive networks with volatile wiper counter registers and nonvolatile data registers. It operates from 2.7V to 5.5V, features 2-wire serial interface, <5µA standby current, and 0.4% resolution-used for precision gain control, DC bias trimming, and programmable reference generation in analog signal chains.

For engineers reviewing the X9259UV24I-2.7T1 datasheet, X9259UV24I-2.7T1 pinout, X9259UV24I-2.7T1 application, or X9259UV24I-2.7T1 equivalent, this page delivers verified functional identity, validated 24-pin TSSOP package mapping, confirmed 2-wire bus timing and register architecture, real-world circuit-level use cases, and two technically documented alternative parts with explicit differences in voltage range and temperature grade.

Technical Context

The X9259UV24I-2.7T1 integrates four independent DCP cores, each with RH/RL/RW terminals, an 8-bit volatile Wiper Counter Register (WCR), and four 8-bit nonvolatile Data Registers (DR00–DR33). Wiper position is set via serial write, transfer from DR, or increment/decrement command-enabling both coarse and fine adjustment.

Its 2-wire interface supports START/STOP, ACK/NACK, and multi-byte instructions including Read/Write WCR, Read/Write DR, DR↔WCR transfer (per-pot or global), and hardware write-protect via active-low WP pin. All nonvolatile writes require high-voltage cycle timing (5–10ms) and are inhibited when WP = HIGH.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (RoHS-compliant, M24.173 drawing), -40°C to +85°C industrial temperature grade, tape-and-reel (T1 suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9259UV24I-2.7T1, the SOIC variant offers identical electrical specs but larger packaging, while the MCP42050 requires SPI infrastructure and lacks hardware write protection-making X9259UV24I-2.7T1 preferable for 2-wire bus consolidation and robust field calibration security.

Availability

X9259UV24I-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical instrument trimming, and telecom front-end biasing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9259UV24I-2.7T1 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

Renesas Electronics Corporation acquired Intersil in 2017 and continues development of its precision analog portfolio, including digitally controlled potentiometers and sensor interface ICs.

The X9259 product line was designed for high-accuracy, nonvolatile analog trimming in industrial, medical, and communications equipment where mechanical potentiometer replacement and long-term calibration stability are critical.

FAQ

What is the operating voltage range for the X9259UV24I-2.7T1?

The X9259UV24I-2.7T1 operates from 2.7V to 5.5V, as specified in the "X9259-2.7" variant designation and confirmed in the Absolute Maximum Ratings table. This range supports direct integration with both 3.3V and 5V systems without level-shifting circuitry, and the device maintains full 256-tap resolution and timing compliance across the entire span.

How many independent potentiometers does the X9259UV24I-2.7T1 contain?

The X9259UV24I-2.7T1 contains four fully independent digitally controlled potentiometers (DCPs), each with dedicated RH, RL, and RW pins, plus associated volatile Wiper Counter Registers and four nonvolatile Data Registers. This quad architecture enables simultaneous trimming of multiple analog paths-such as dual-channel audio gain and dual-sensor offset correction-in a single 24-pin package.

Does the X9259UV24I-2.7T1 support I²C-compatible communication?

Yes, the X9259UV24I-2.7T1 implements a standard 2-wire serial interface compatible with I²C protocol timing and signaling conventions-including START/STOP conditions, ACK/NACK responses, and 7-bit addressing with 4-bit hardware-configurable LSBs (A3–A0). It operates up to 400kHz and requires only SDA, SCL, and pull-up resistors-no special master firmware is needed beyond standard I²C drivers.

What is the purpose of the WP pin on the X9259UV24I-2.7T1?

The WP (Write Protect) pin on the X9259UV24I-2.7T1 is an active-low hardware control that disables all nonvolatile writes to the Data Registers when asserted (pulled LOW). This prevents accidental overwriting of factory-calibrated or user-saved trim values during system boot, firmware updates, or transient noise events-enhancing reliability in mission-critical analog calibration applications.

Can the X9259UV24I-2.7T1 retain wiper settings after power loss?

The X9259UV24I-2.7T1 does not retain wiper positions directly after power loss because the Wiper Counter Register (WCR) is volatile. However, on power-up, it automatically loads the contents of Data Register zero (DR#0) for each DCP into its corresponding WCR. Since DR#0 is nonvolatile and retains data for 100 years, calibrated wiper positions are restored at startup-provided DR#0 was previously written with the desired value.