Renesas X9259UV24IZT1

Overview

X9259UV24IZT1 from Intersil (now Renesas) 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/voltage trimming in analog signal chains.

For engineers reviewing the X9259UV24IZT1 datasheet, X9259UV24IZT1 pinout, X9259UV24IZT1 application, or X9259UV24IZT1 equivalent, this page delivers verified electrical specs, TSSOP-24 package mapping, real-world circuit roles (e.g., DC bias setting in RF amplifiers), and confirmed alternative parts with documented functional differences.

Technical Context

The X9259UV24IZT1 integrates four monolithic CMOS DCPs, each with RH/RL/RW terminals and an 8-bit volatile Wiper Counter Register (WCR) controlling wiper position across 256 taps. Wiper position resolution is 0.4%, and wiper resistance is 220Ω typical at VCC = 5V.

It uses a 2-wire bus (SDA/SCL) with device address pins A0–A3 enabling up to 16 devices on one bus. Nonvolatile storage includes four 8-bit Data Registers per DCP, supporting 100,000 write cycles and 100-year data retention. Hardware write protection is provided via active-low WP pin.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (RoHS compliant, M24.173 drawing), -40°C to +85°C industrial temperature range.

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/SL, the X9259UV24IZT1 uniquely combines quad-channel integration, hardware write protection, 100-year nonvolatile retention, and 2-wire simplicity-making it optimal for industrial sensor nodes and RF subsystems requiring autonomous, drift-free analog tuning.

Availability

X9259UV24IZT1 is available at Aetrix Electronics and suitable for industrial sensor conditioning, RF power amplifier biasing, and programmable voltage regulator feedback applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9259UV24IZT1 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 (formerly Intersil) is a global semiconductor leader specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The X9259 product line was designed specifically for high-reliability analog trimming in systems requiring persistent calibration, such as test equipment, medical sensors, and telecom infrastructure-emphasizing nonvolatile accuracy and single-supply operation.

FAQ

What is the operating temperature range for the X9259UV24IZT1?

The X9259UV24IZT1 is rated for industrial operation from –40°C to +85°C. This range is validated across all electrical specifications including end-to-end resistance tolerance, wiper resistance, and nonvolatile write timing. The "U" suffix in the part number explicitly denotes the industrial temperature grade, distinguishing it from commercial-grade variants like X9259UV24Z.

Does the X9259UV24IZT1 require external pull-up resistors on its 2-wire interface?

Yes, the X9259UV24IZT1 requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a CMOS input. Typical values are 2.2kΩ to 4.7kΩ to VCC. Pull-ups ensure valid logic levels during bus idle states and meet rise time requirements (tR ≤ 300ns) specified in the AC timing table.

How does the hardware write protect (WP) pin function on the X9259UV24IZT1?

The WP pin on the X9259UV24IZT1 is an active-low input that disables all nonvolatile writes to Data Registers when pulled LOW. Volatile operations-including WCR writes and reads-remain fully functional. This allows safe runtime adjustment while preventing accidental corruption of factory-calibrated or field-trimmed settings stored in nonvolatile memory.

Can the X9259UV24IZT1 be used as a two-terminal variable resistor?

Yes, the X9259UV24IZT1 can operate as a two-terminal variable resistor by connecting either RHx or RLx to RWx externally, leaving the unused terminal open or tied to a fixed potential. This configuration is explicitly supported in the datasheet and maintains full 256-step resolution and nonvolatile storage capability for the selected DCP channel.

What is the maximum clock frequency supported by the 2-wire interface of the X9259UV24IZT1?

The X9259UV24IZT1 supports a maximum 2-wire clock frequency of 400kHz, as specified in the AC Electrical Characteristics table. This allows efficient register access and wiper updates within tight MCU timing budgets. All timing parameters-including tSU:DAT (100ns setup) and tHD:DAT (30ns hold)-are guaranteed at this rate under recommended operating conditions.