Renesas X9250UV24IZ-2.7T2

Overview

X9250UV24IZ-2.7T2 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution per channel, SPI serial interface, dual ±2.7V to ±5.5V analog supplies (V+/V−), and 2.7V–5.5V system supply (VCC). It integrates four independent 100kΩ resistor arrays for precision voltage divider or variable resistor use in programmable gain control, offset trimming, and sensor calibration circuits.

For engineers reviewing the X9250UV24IZ-2.7T2 datasheet, X9250UV24IZ-2.7T2 pinout, X9250UV24IZ-2.7T2 application, or X9250UV24IZ-2.7T2 equivalent, key selection criteria include its 24-pin TSSOP package, nonvolatile wiper position storage across four data registers per pot, <5µA standby current, and hardware write-protect (WP) functionality for robust configuration retention.

Technical Context

The X9250UV24IZ-2.7T2 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 write, DR-to-WCR transfer, or real-time increment/decrement.

It supports full SPI mode (CPOL=0, CPHA=0), uses A0/A1 for slave addressing (up to 4 devices on bus), and features HOLD for serial communication pause. Analog section operates from V+ and V− rails independent of VCC, enabling true bipolar operation with VH/RH and VL/RL referenced to V+ and V− respectively.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm body width, MDP0044 footprint), RoHS-compliant Pb-free plus anneal finish.

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 X9250UV24IZ-2.7T2 uniquely delivers quad-channel 100kΩ pots with bipolar analog supply support, nonvolatile wiper storage, and hardware write protection-making it optimal for multi-parameter calibration in industrial sensor modules and programmable power supplies.

Availability

X9250UV24IZ-2.7T2 is available at Aetrix Electronics and suitable for programmable gain amplifiers, offset calibration circuits, voltage regulator feedback networks, and comparator hysteresis control requiring stable component supply and long-term configuration retention.

Supply support for X9250UV24IZ-2.7T2 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 company specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.

The X9250UV24IZ-2.7T2 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in automated test equipment, medical instrumentation, and programmable power systems.

FAQ

What is the absolute maximum voltage rating for V+ and V− pins on the X9250UV24IZ-2.7T2?

The X9250UV24IZ-2.7T2 specifies absolute maximum ratings of +10V on V+ and −10V on V−, with a maximum differential (V+) − (V−) of 12V. Operation beyond these limits risks permanent damage. The recommended operating range remains ±2.7V to ±5.5V per the -2.7 suffix designation, and the X9250UV24IZ-2.7T2 must never be subjected to voltages exceeding ±10V on either rail regardless of duration.

Does the X9250UV24IZ-2.7T2 support true bipolar operation, and how is it implemented?

Yes, the X9250UV24IZ-2.7T2 supports true bipolar operation via independent V+ and V− analog supply pins. Each potentiometer's VH/RH and VL/RL terminals reference these rails directly, allowing resistor arrays to span from −5.5V to +5.5V. This architecture enables symmetrical signal conditioning in audio preamps and sensor interfaces where input signals cross ground, and the X9250UV24IZ-2.7T2 maintains full 256-tap resolution across the entire bipolar range.

How does the hardware write protect (WP) pin function on the X9250UV24IZ-2.7T2?

When the WP pin is driven LOW, the X9250UV24IZ-2.7T2 blocks all nonvolatile write operations to its four Data Registers (DR0–DR3), preventing accidental overwrites of calibrated settings during firmware execution or debug sessions. Volatile WCR updates remain enabled. The X9250UV24IZ-2.7T2 resumes full nonvolatile write capability only when WP returns HIGH, providing a simple, latch-free method to safeguard configuration integrity.

Can the X9250UV24IZ-2.7T2 be used in a 3-wire SPI configuration, and what design considerations apply?

Yes, the X9250UV24IZ-2.7T2 supports 3-wire SPI by connecting SI and SO to the same microcontroller pin, leveraging their three-state outputs. During transmission, SI drives the line while SO is high-impedance; during reception, SO drives while SI is high-impedance. The X9250UV24IZ-2.7T2 requires careful timing control to avoid bus contention, and pull-up/pull-down resistors may be needed to ensure defined states during transitions. This reduces pin count but adds software overhead for direction management.

What is the power-up behavior of the X9250UV24IZ-2.7T2 wiper positions, and how is it controlled?

On power-up, the X9250UV24IZ-2.7T2 automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR), establishing the initial wiper position. This recall occurs only after all three supplies (VCC, V+, V−) stabilize within 1ms of each other. The X9250UV24IZ-2.7T2 thus ensures repeatable startup states without host intervention, and DR0 values can be pre-programmed during manufacturing or field calibration.