Renesas X9259TV24I

Overview

X9259TV24I from Intersil (now Renesas) is a quad digitally controlled potentiometer (XDCP™) IC implementing four independent 256-tap, 50kΩ end-to-end resistance potentiometers with volatile wiper counter registers and nonvolatile data registers, controlled via 2-wire (I²C-compatible) interface, used for precision gain/voltage trimming in analog signal chains.

For engineers reviewing the X9259TV24I datasheet, X9259TV24I pinout, X9259TV24I application, or X9259TV24I equivalent, this page delivers verified electrical specs, validated pin functions, confirmed industrial temperature operation (–40°C to +85°C), and real-world circuit-level use cases - all extracted from FN8169 Rev 6.00.

Technical Context

The X9259TV24I integrates four monolithic CMOS DCPs, each with resistor ladder + CMOS switch array, 8-bit volatile WCR (0–255), and four 8-bit nonvolatile DRs (DR#0–DR#3). Wiper position is set by WCR value and recalled from DR#0 at power-up.

It uses a standard 2-wire bus with SDA/SCL, device address pins A0–A3 (4-bit slave address), hardware write-protect (WP), and supports three-byte instructions (e.g., Read/Write WCR, Read/Write DR) plus two-byte transfers and increment/decrement mode for fine tuning.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (RoHS-compliant, M24.173 drawing), surface-mount, 0.65 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42050-I/P, the X9259TV24I uniquely delivers quad-channel integration, hardware write protection, four nonvolatile registers per channel, and global/incremental control - making it the only choice for compact, self-contained, field-calibratable analog tuning in industrial systems.

Availability

X9259TV24I is available at Aetrix Electronics and suitable for industrial sensor conditioning, programmable power supplies, and audio signal processing requiring stable component supply, long-term calibration retention, and RoHS-compliant packaging.

Supply support for X9259TV24I 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 power management ICs for industrial, communications, and computing markets.

The X9259TV24I belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in precision analog calibration, trimming, and programmable gain applications where reliability, nonvolatility, and multi-channel integration are critical.

FAQ

What is the operating temperature range for the X9259TV24I?

The X9259TV24I is rated for industrial operation from –40°C to +85°C, as confirmed in the Ordering Information table (FN8169 Rev 6.00, Page 2) under "TEMP RANGE" for part numbers ending in 'I'. This qualifies it for deployment in harsh environments such as factory automation controllers and outdoor telecom equipment where ambient thermal stress is present. The X9259TV24I maintains specified wiper resistance, linearity, and nonvolatile write timing across this full range.

Does the X9259TV24I support true I²C communication?

Yes, the X9259TV24I implements a fully compatible 2-wire interface meeting I²C protocol conventions: START/STOP conditions, 7-bit slave addressing (with 4-bit hardware address A0–A3), ACK/NACK handshaking, and open-drain SDA with external pull-up. It operates at up to 400 kHz clock rate and responds to standard I²C read/write sequences - confirmed in Sections 6–7 of FN8169 Rev 6.00. The X9259TV24I does not require special master firmware and interoperates with standard I²C controllers.

How many nonvolatile registers does the X9259TV24I have per potentiometer?

The X9259TV24I has four 8-bit nonvolatile Data Registers (DR#0 through DR#3) for each of its four DCPs, totaling 16 nonvolatile registers. As documented on Page 5, these store wiper positions or system parameters and retain data for 100 years. DR#0 is automatically loaded into the corresponding volatile Wiper Counter Register (WCR) at power-up - a key behavior distinguishing the X9259TV24I from simpler digital pots lacking default recall capability.

Can the X9259TV24I be used as a two-terminal variable resistor?

Yes, the X9259TV24I supports both three-terminal potentiometer and two-terminal variable resistor configurations. Per Page 1, "The XDCP can be used as a three-terminal potentiometer or as a two-terminal variable resistor." Each DCP provides RH, RL, and RW pins; connecting RH to V_CC (or signal source) and leaving RL floating (or tying to ground depending on topology) configures it as a rheostat. The 50kΩ R_TOTAL and 220Ω typical wiper resistance make it suitable for current-limiting or gain-setting roles in op-amp feedback networks.

What is the maximum clock frequency supported by the X9259TV24I's 2-wire interface?

The X9259TV24I supports a maximum 2-wire clock frequency of 400 kHz, as specified in the AC Timing table (Page 14, f_SCL = 400 kHz). This matches standard Fast-mode I²C and allows reliable communication with most microcontrollers without timing margin concerns. The device also defines strict min/max values for t_HIGH, t_LOW, t_SU:DAT, and other timing parameters - all verified in production testing and applicable to the X9259TV24I variant.