Renesas X9250US24ZT1

Overview

X9250US24ZT1 from Intersil is a quad digitally controlled potentiometer (XDCP™) with SPI interface, 256-tap resolution per channel, 50kΩ end-to-end resistance, and nonvolatile wiper position storage. It operates from 2.7V to 5.5V VCC and ±2.7V to ±5.5V analog supplies, delivering low-noise, low-power performance in precision analog trimming applications such as programmable gain amplifiers and voltage regulator feedback networks.

For engineers reviewing the X9250US24ZT1 datasheet, X9250US24ZT1 pinout, X9250US24ZT1 application, or X9250US24ZT1 equivalent, key selection considerations include its quad-channel architecture, dual-supply analog section (V+/V−), hardware write-protect (WP) pin, HOLD functionality for SPI pause/resume, and compatibility with industrial temperature range (−40°C to +85°C) when ordered as X9250US24IZ variants.

Technical Context

The X9250US24ZT1 implements four independent 255-segment resistor arrays, each controlled by an 8-bit volatile Wiper Counter Register (WCR) and backed by four 8-bit nonvolatile Data Registers (DR0–DR3). Wiper position is updated via SPI commands including direct WCR load, DR-to-WCR transfer, global transfers, and real-time increment/decrement using SI state during SCK edges.

Its analog section accepts split supplies (V+ and V−) enabling true bipolar operation, while digital logic runs on VCC/VSS. The device supports up to four devices on one SPI bus via A0/A1 address pins, features <5µA standby current, and guarantees 100,000 data changes per bit with 100-year data retention - critical for unattended or field-deployed systems requiring persistent calibration settings.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300 mil), RoHS-compliant Pb-free plus anneal finish (M24.3 footprint).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/P, the X9250US24ZT1 uniquely supports split analog supplies (V+/V−), hardware write protection, and SPI HOLD - making it the only option among the three qualified for robust, field-deployed instrumentation requiring persistent calibration and noise-immune analog signal conditioning.

Availability

X9250US24ZT1 is available at Aetrix Electronics and suitable for programmable gain amplifiers, voltage regulator feedback networks, comparator hysteresis control, and audio channel balancing requiring stable component supply and long-term calibration integrity.

Supply support for X9250US24ZT1 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 industrial, communications, and computing markets, emphasizing reliability and precision.

The X9250US24ZT1 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered specifically for replacing mechanical pots in systems demanding nonvolatile setting retention, low noise, and robust SPI-controlled analog adjustment.

FAQ

What is the operating temperature range for the X9250US24ZT1?

The X9250US24ZT1 is rated for commercial temperature range (0°C to +70°C) per its ordering suffix "US". For extended operation from −40°C to +85°C, the X9250US24IZ or X9250US24I variants are specified. The "Z" in X9250US24ZT1 denotes Pb-free packaging, not temperature grade.

Does the X9250US24ZT1 support true bipolar analog operation?

Yes, the X9250US24ZT1 supports true bipolar analog operation via dedicated V+ and V− supply pins, allowing the resistor arrays to operate across ±2.7V to ±5.5V. This enables use in op-amp circuits requiring symmetric headroom, unlike single-supply digital pots such as the MCP42050.

How does nonvolatile storage work in the X9250US24ZT1?

The X9250US24ZT1 stores wiper positions in four 8-bit nonvolatile Data Registers (DR0–DR3) per channel. Writing to these registers triggers an internal 5–10ms high-voltage write cycle. Upon power-up, DR0 automatically loads into the volatile Wiper Counter Register (WCR), restoring the last-saved setting without MCU intervention.

Can multiple X9250US24ZT1 devices share the same SPI bus?

Yes, up to four X9250US24ZT1 devices can share one SPI bus using the A0 and A1 address pins to configure unique 2-bit slave addresses (00–11). Each device responds only when its address matches the ID byte sent by the host, enabling compact multi-pot systems without additional GPIOs.

What is the purpose of the HOLD pin on the X9250US24ZT1?

The HOLD pin on the X9250US24ZT1 allows the host controller to pause an ongoing SPI transaction without resetting the internal state. When asserted LOW (with SCK LOW), it freezes clock and data flow; bringing HOLD HIGH resumes communication from the exact point of interruption - vital for deterministic real-time systems.