Renesas X9259TS24IZ

Overview

X9259TS24IZ from Intersil (now Renesas) is a quad digitally controlled potentiometer (XDCP™) IC implementing four independent 256-tap, 50kΩ end-to-end resistance DCPs 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 rated for -40°C to +85°C industrial temperature range. It serves as programmable gain/offset trim element in analog signal conditioning circuits.

For engineers reviewing the X9259TS24IZ datasheet, X9259TS24IZ pinout, X9259TS24IZ application, or X9259TS24IZ equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in sensor calibration and voltage regulation, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The X9259TS24IZ integrates four monolithic CMOS digitally controlled potentiometers, each with 256 resistor taps and a dedicated 8-bit volatile Wiper Counter Register (WCR). Wiper position is set via 2-wire bus commands including direct write, register transfer, and increment/decrement modes.

Each DCP includes four nonvolatile 8-bit Data Registers (DR00–DR03 per channel) supporting 100,000 write cycles and 100-year data retention. Hardware write protection (WP pin) disables nonvolatile writes when asserted low, and device address pins A0–A3 support up to 16 devices on one bus.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (RoHS-compliant, M24.3 drawing), surface-mount, 0.300" wide body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9259TS24IZ, AD5242BRUZ10 offers higher channel density per mm² but lacks nonvolatile storage and quad integration, while MCP42010-I/P provides identical resolution but demands PCB real estate and firmware overhead to replicate four independent channels.

Availability

X9259TS24IZ is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply design, and audio system tuning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9259TS24IZ 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 precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.

The X9259 product line was designed to replace electromechanical potentiometers in automated calibration, closed-loop control, and reconfigurable analog signal paths - emphasizing nonvolatile setting retention, low power, and industrial temperature reliability.

FAQ

What is the function of the WP pin on the X9259TS24IZ?

The WP (Write Protect) pin on the X9259TS24IZ is an active-low hardware control that disables all nonvolatile writes to the Data Registers when pulled to logic LOW. This prevents accidental overwriting of calibrated settings during normal operation or firmware updates. When WP is HIGH or left floating (with internal pull-up inactive), nonvolatile writes via the 2-wire interface are enabled. The X9259TS24IZ retains its last valid DR contents even if WP is toggled mid-operation.

Can the X9259TS24IZ operate from a 3.3V supply?

Yes, the X9259TS24IZ fully supports 3.3V operation as part of its specified 2.7V to 5.5V V_CC range. At 3.3V, wiper resistance is typically 300Ω, and logic thresholds (VIH/VIL) scale proportionally (VIH ≥ 2.31V, VIL ≤ 0.99V). All 2-wire timing parameters, including f_SCL up to 400kHz and t_WR ≤10ms for nonvolatile writes, remain valid. No level-shifting is required when interfacing with 3.3V microcontrollers.

How does the X9259TS24IZ handle power-up initialization?

On power-up, the X9259TS24IZ automatically loads the contents of DR00, DR10, DR20, and DR30 into WCR0–WCR3 respectively - restoring the default wiper positions without host intervention. This behavior is guaranteed only if V_CC ramp rate meets t_rV_CC ≥ 0.2V/ms and V_CC stabilizes before issuing commands. The t_PUR (1ms) and t_PUW (50ms) delays define minimum wait times before read and write operations can be safely initiated after V_CC stabilization.

What is the maximum current the wiper terminal can sink or source in the X9259TS24IZ?

The X9259TS24IZ wiper terminals (RW0–RW3) are rated for ±3mA continuous current per channel, as specified under "Wiper current" in Absolute Maximum Ratings. Exceeding this limit risks irreversible degradation of the CMOS switch elements. For applications requiring higher current - such as driving LED bias or op-amp inputs with low impedance - external buffer amplifiers must be used. The 220Ω typical wiper resistance at 5V further constrains usable voltage swing under load.

Does the X9259TS24IZ support I²C standard-mode or fast-mode timing?

The X9259TS24IZ supports standard-mode I²C timing with a maximum clock frequency of 400kHz, matching Fast-mode specifications. Its AC timing parameters - including t_CYC (2500ns), t_HIGH (600ns), t_SU:STA (600ns), and t_AA (0.9µs) - comply fully with NXP I²C-bus specification Rev. 6. For reliable operation, SDA and SCL rise/fall times must stay within 300ns, and bus capacitance must remain ≤400pF. No special protocol extensions or clock stretching beyond standard I²C slave behavior are required.