Renesas X9258TS24T1

Overview

X9258TS24T1 from Intersil is a quad digital potentiometer IC implementing four independent 256-tap resistor arrays with volatile wiper counters and four non-volatile data registers per channel, supporting 2-wire (I²C-compatible) interface, ±5V dual analog supplies (V+/V−), and 100kΩ end-to-end resistance - used for precision gain/offset trimming in analog signal chains and programmable filter tuning.

For engineers reviewing the X9258TS24T1 datasheet, X9258TS24T1 pinout, X9258TS24T1 application, or X9258TS24T1 equivalent, this page delivers verified electrical specs, SOIC-24 package mapping, I²C register-level control behavior, wiper response timing (≤10µs), and real-world replacement guidance against functionally aligned digital potentiometers.

Technical Context

The X9258TS24T1 integrates four monolithic CMOS resistor arrays (255 segments each), each controlled by an 8-bit volatile Wiper Counter Register (WCR) decoded to select one of 256 tap points. Each array supports three-terminal potentiometer or two-terminal rheostat configuration with VH/RH, VL/RL, and VW/RW terminals.

It uses a 2-wire serial interface compliant with I²C timing (fSCL ≤ 400kHz), with slave address formed by fixed 0101b type identifier plus user-configurable A0–A3 pins. Nonvolatile writes to Data Registers (DR0–DR3) require V+ ≥ 4.5V and take 5–10ms, while wiper position recall at power-up loads DR0 into the WCR.

Key Specifications

Pinout & Package

24-lead SOIC (300 mil, Pb-free, RoHS-compliant) with standard pin pitch and thermal resistance θJA = 46°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9258TS24T1, AD5204BRUZ100 trades I²C simplicity for unipolar-only operation and missing WP protection, while MCP42050-I/P sacrifices nonvolatile storage for lower unit cost and SPI-native integration - both require PCB layout changes due to different pinouts and supply schemes.

Availability

X9258TS24T1 is available at Aetrix Electronics and suitable for audio equipment manufacturing, industrial sensor signal conditioning, DC-DC converter calibration, and medical instrument production requiring stable component supply and long-term lifecycle support.

Supply support for X9258TS24T1 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 (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for precision signal conditioning, power management, and interface applications.

The X9258 product line delivers digitally programmable resistive elements for replacing mechanical potentiometers in environments demanding repeatability, reliability, and nonvolatile configuration storage - especially where bipolar analog operation is required.

FAQ

What is the power-up behavior of the X9258TS24T1?

At power-up, the X9258TS24T1 automatically loads the contents of Data Register 0 (DR0) for each channel into its respective volatile Wiper Counter Register (WCR), establishing a known wiper position without host intervention. All three supplies (VCC, V+, V−) must stabilize within 1ms of each other for reliable recall; tPUR is 1ms minimum delay before read operations may begin.

Does the X9258TS24T1 support true bipolar analog operation?

Yes, the X9258TS24T1 supports true bipolar analog operation via dedicated V+ and V− supply pins rated at +4.5V to +5.5V and −5.5V to −4.5V respectively. This enables the resistor arrays to handle signals swinging above and below ground - critical for AC-coupled instrumentation and op-amp configurations requiring symmetric rail-to-rail wiper voltage range.

How does the hardware write protect (WP) pin function on the X9258TS24T1?

The WP pin on the X9258TS24T1 disables nonvolatile writes to all Data Registers when held low. When WP is high, the device permits Write Data Register and XFR WCR→DR instructions. This provides board-level control over configuration persistence - for example, grounding WP during normal operation prevents accidental overwrites of factory-calibrated DR0 values.

What is the maximum clock frequency supported by the X9258TS24T1's 2-wire interface?

The X9258TS24T1 supports a maximum I²C-compatible clock frequency of 400kHz, with guaranteed timing parameters including tHIGH ≥ 600ns, tLOW ≥ 1300ns, and tCYC ≥ 2500ns. It operates as a slave device only; the master must generate all clocks and manage arbitration. Pull-up resistors must be selected per bus capacitance to meet rise time (tR ≤ 300ns) requirements.

Can the X9258TS24T1 be used in rheostat (two-terminal) mode?

Yes, the X9258TS24T1 can be configured as a two-terminal variable resistor by connecting either VH or VL to the desired fixed potential and using VW as the adjustable terminal - for example, tying VH to V+ and VL to signal ground creates a grounded-rheostat topology. The 100kΩ end-to-end resistance and 40Ω typical wiper resistance (at ±5V) define usable current limits and insertion loss.