Renesas X9250TS24ZT1

Overview

X9250TS24ZT1 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution per channel, SPI serial interface, nonvolatile wiper position storage, and dual ±2.7V to ±5.5V analog supplies - used for precision gain/offset trimming in instrumentation amplifiers and programmable voltage regulators.

For engineers reviewing the X9250TS24ZT1 datasheet, X9250TS24ZT1 pinout, X9250TS24ZT1 application, or X9250TS24ZT1 equivalent, key selection criteria include its 100kΩ end-to-end resistance, 40Ω typical wiper resistance at 5V, <5µA standby current, 24-pin SOIC package, and support for four independent nonvolatile data registers per potentiometer.

Technical Context

The X9250TS24ZT1 integrates four independent 255-segment resistor arrays with CMOS switch-controlled wipers, each driven by an 8-bit volatile Wiper Counter Register (WCR) and backed by four 8-bit nonvolatile Data Registers (DR0–DR3). Power-up loads DR0 into the WCR for deterministic initialization.

It implements full SPI-protocol compatibility with CS, SCK, SI, and SO signals, supports hardware write protection via WP pin, device addressing via A0/A1, and pause/resume functionality via HOLD - all operating across VCC = 2.7V–5.5V and analog supplies V+ = +2.7V–+5.5V / V− = −2.7V–−5.5V.

Key Specifications

Pinout & Package

24-pin SOIC (300 mil), RoHS-compliant Pb-free plus anneal finish, M24.3 package drawing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ100 and MCP42010-I/P, the X9250TS24ZT1 uniquely delivers quad-channel operation with bipolar analog supply capability, hardware write protection, and four nonvolatile registers per pot - making it suitable for high-reliability industrial calibration and programmable power management where configuration integrity and analog flexibility are essential.

Availability

X9250TS24ZT1 is available at Aetrix Electronics and suitable for instrumentation calibration, programmable power supplies, and sensor signal conditioning requiring stable component supply and long-term lifecycle assurance.

Supply support for X9250TS24ZT1 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) is a semiconductor manufacturer specializing in high-performance analog and mixed-signal ICs for industrial, communications, and computing markets.

The X9250TS24ZT1 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical potentiometers in precision analog circuits requiring programmability, nonvolatility, and multi-channel integration.

FAQ

What is the maximum SPI clock frequency supported by the X9250TS24ZT1?

The X9250TS24ZT1 supports a maximum SPI clock frequency of 2.0 MHz, as specified in the AC timing section of the FN8165 datasheet. This allows fast configuration updates while maintaining reliable communication with standard microcontrollers. The X9250TS24ZT1 uses standard SPI mode 0 (CPOL = 0, CPHA = 0) with data latched on the rising edge of SCK and output on the falling edge.

Does the X9250TS24ZT1 retain wiper position after power cycling?

Yes, the X9250TS24ZT1 automatically loads the contents of Data Register 0 (DR0) into the Wiper Counter Register (WCR) at power-up, ensuring the last stored wiper position is restored. This nonvolatile recall occurs only after all supplies (VCC, V+, V−) reach stable values, and is guaranteed for 100 years with 100,000 write cycles per register - a core feature of the X9250TS24ZT1 design.

Can the X9250TS24ZT1 operate with bipolar analog supplies while using a unipolar digital supply?

Yes, the X9250TS24ZT1 supports independent supply domains: VCC (2.7V–5.5V) powers the digital SPI interface, while V+ (+2.7V–+5.5V) and V− (−2.7V–−5.5V) power the analog resistor arrays. This allows the X9250TS24ZT1 to condition bipolar signals (e.g., ±10V inputs) while interfacing with a 3.3V or 5V microcontroller - a key capability not found in most digital potentiometers.

How many unique device addresses can be configured on a shared SPI bus with the X9250TS24ZT1?

The X9250TS24ZT1 supports up to four unique device addresses via the A0 and A1 pins, which configure the two least-significant bits of the 8-bit slave address. With A0/A1 tied to VSS, VCC, or driven actively, combinations 00, 01, 10, and 11 allow four X9250TS24ZT1 devices to share one SPI bus without address conflict - enabling compact multi-channel analog control systems.

What is the purpose of the HOLD pin on the X9250TS24ZT1?

The HOLD pin on the X9250TS24ZT1 pauses ongoing SPI transactions without resetting the command sequence - allowing the host controller to temporarily suspend communication (e.g., during interrupt service) and resume from the exact same point. To use HOLD, it must be asserted LOW while SCK is LOW; resuming requires bringing HOLD HIGH while SCK remains LOW. This ensures glitch-free reconfiguration in real-time systems using the X9250TS24ZT1.