Renesas X9259US24Z

Overview

X9259US24Z from Renesas (formerly Intersil) is a quad digitally controlled potentiometer (XDCP™) IC implementing four independent 256-tap, 50kΩ end-to-end resistive elements 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 is used for precision gain control, DC bias trimming, and programmable reference generation in analog signal chains.

For engineers reviewing the X9259US24Z datasheet, X9259US24Z pinout, X9259US24Z application, or X9259US24Z equivalent, this page delivers verified electrical specs, validated SOIC-24 pin mapping, confirmed 2-wire bus timing constraints, and real-world use cases in audio, sensor conditioning, and power regulation - all traceable to FN8169 Rev 6.00.

Technical Context

The X9259US24Z 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 real-time increment/decrement using SCL/SDA handshaking.

It implements a resistor-ladder + CMOS-switch architecture with ratiometric temperature coefficient of ±20 ppm/°C and absolute linearity error of ±1 LSB. The 2-wire interface supports up to 16 devices on one bus via A3–A0 address pins, and hardware write protection (WP) disables nonvolatile writes when asserted low.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (RoHS-compliant, M24.3 drawing), body width 7.5 mm, standard JEDEC MS-013 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/P, the X9259US24Z uniquely combines quad 50 kΩ channels, true 2-wire compatibility, hardware write protection, and four nonvolatile data registers per channel - enabling robust, self-initializing analog configuration without host firmware intervention at startup.

Availability

X9259US24Z is available at Aetrix Electronics and suitable for audio amplifiers, sensor signal conditioners, programmable power supplies, and RF bias networks requiring stable component supply across commercial temperature range (0°C to +70°C).

Supply support for X9259US24Z 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 acquired Intersil in 2017 and maintains full technical and manufacturing continuity for the XDCP™ family. Renesas is a global semiconductor leader focused on embedded processing, analog, and power solutions.

The X9259 belongs to Renesas' XDCP™ (Digitally Controlled Potentiometer) product line, designed specifically for replacing mechanical trimmers in precision analog systems requiring programmable resistance, nonvolatile configuration storage, and low-power serial control.

FAQ

What is the operating voltage range for the X9259US24Z?

The X9259US24Z operates from 2.7 V to 5.5 V, as specified in the "X9259-2.7" variant designation in the Ordering Information table of FN8169 Rev 6.00. This extended low-voltage capability enables compatibility with modern 3.3 V and mixed-voltage systems, unlike the standard 5 V ±10% version.

Does the X9259US24Z retain wiper settings after power cycling?

Yes - the X9259US24Z automatically loads the contents of default Data Registers (DR00, DR10, DR20, DR30) into their corresponding volatile Wiper Counter Registers (WCR0–WCR3) at power-up. These DR values are nonvolatile and retain settings for 100 years, ensuring repeatable startup behavior without host initialization.

How many devices can share the same 2-wire bus with the X9259US24Z?

Up to 16 X9259US24Z devices can coexist on a single 2-wire bus. This is enabled by the four device address pins (A3–A0), which configure the four least-significant bits of the 8-bit slave address (with fixed MSBs 0101), yielding 2⁴ = 16 unique addresses.

What is the maximum clock frequency supported by the X9259US24Z 2-wire interface?

The X9259US24Z supports a maximum SCL clock frequency of 400 kHz, as documented in the AC Timing table (Page 14, FN8169 Rev 6.00). This aligns with standard fast-mode I²C timing and ensures reliable communication with common microcontroller peripherals.

Can the X9259US24Z be used as a two-terminal variable resistor?

Yes - each of the four DCPs in the X9259US24Z can operate as either a three-terminal potentiometer (using RH, RL, and RW) or a two-terminal variable resistor (e.g., connecting RH to signal and RW to output, leaving RL open or grounded). This flexibility is explicitly stated in the datasheet's first paragraph and Functional Diagram.