Renesas X9259TS24

Overview

X9259TS24 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, controlled via 2-wire serial interface, used for precision gain, bias, and offset adjustment in analog signal chains.

For engineers reviewing the X9259TS24 datasheet, X9259TS24 pinout, X9259TS24 application, or X9259TS24 equivalent, this page delivers verified electrical specs, validated SOIC-24 pin mapping, confirmed 2-wire bus timing compliance, and real-world use cases in voltage regulation, sensor conditioning, and audio control circuits.

Technical Context

The X9259TS24 integrates four monolithic CMOS DCPs, each with RH/RL/RW terminals, 8-bit volatile WCRs, and four 8-bit nonvolatile DRs (DR#0–DR#3). Wiper position is set by WCR value (0x00–0xFF), with power-up default loading DR#0 into corresponding WCR.

It supports 2-wire interface with device address pins A0–A3 (4-bit slave address), hardware write-protect (WP), and open-drain SDA/SCL compliant with I²C timing (fSCL ≤ 400 kHz). Nonvolatile writes require high-voltage cycle (tWR = 5–10 ms) and are inhibited when WP = HIGH.

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 MCP41HV51-503, the X9259TS24 uniquely combines quad 50kΩ channels, true 2-wire/I²C compatibility, hardware write-protect, and four nonvolatile registers per channel - making it optimal for compact, self-calibrating, low-voltage embedded analog systems.

Availability

X9259TS24 is available at Aetrix Electronics and suitable for voltage regulation, sensor signal conditioning, audio control, and precision offset trimming requiring stable component supply and long-term calibration integrity.

Supply support for X9259TS24 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 delivers digitally programmable analog front-end components optimized for precision calibration, sensor interfacing, and adaptive biasing in resource-constrained embedded systems.

FAQ

What is the operating voltage range for the X9259TS24?

The X9259TS24 operates from 2.7 V to 5.5 V on a single supply. This range accommodates both 3.3 V and 5 V system rails without level-shifting. The device specifies VCC ≥ VH, VL, and VW during operation, and power-up ramp rate must be ≥0.2 V/ms to ensure reliable initialization. Operation outside this range may cause undefined behavior or damage.

How many wiper positions does the X9259TS24 support per potentiometer?

The X9259TS24 supports 256 discrete wiper positions per potentiometer, implemented via an 8-bit volatile Wiper Counter Register (WCR). Each position corresponds to a 0.4% step of total end-to-end resistance (50 kΩ), enabling precise digital control of analog voltage division or resistance. Wiper movement is monotonic and repeatable across temperature.

Does the X9259TS24 retain its settings after power cycling?

Yes - the X9259TS24 retains wiper settings across power cycles using nonvolatile Data Registers (DR#0–DR#3). At power-up, each DCP loads DR#0 into its associated WCR. DR contents survive >100 years and withstand >100,000 write cycles. Volatile WCR values are lost on power-down but restored from DR#0 automatically.

Can the X9259TS24 be used as a two-terminal variable resistor?

Yes - the X9259TS24 supports both three-terminal potentiometer and two-terminal variable resistor configurations. For two-terminal use, connect either RH or RL to the wiper (RW), leaving the unused terminal open or grounded depending on topology. Wiper resistance (220 Ω typ. at 5 V) and 50 kΩ end-to-end resistance define usable range and insertion loss.

What is the function of the WP pin on the X9259TS24?

The WP (Write Protect) pin on the X9259TS24 is an active-low hardware lock that disables all nonvolatile writes to Data Registers when pulled LOW. While WP = LOW, instructions like Write Data Register or XFR to DR are ignored - preventing accidental overwrites of calibrated values. WP has no effect on volatile WCR writes or reads.