Renesas X9250UV24IZ

Overview

X9250UV24IZ from Intersil is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution per channel, SPI serial interface, and dual analog supply capability (V+ = +2.7V to +5.5V, V− = −2.7V to −5.5V). It integrates four independent 100kΩ resistor arrays in a single 24-lead TSSOP package, supporting three-terminal potentiometer or two-terminal variable resistor configurations in precision analog signal conditioning circuits.

For engineers reviewing the X9250UV24IZ datasheet, X9250UV24IZ pinout, X9250UV24IZ application, or X9250UV24IZ equivalent, this device delivers nonvolatile wiper position storage, <5µA standby current, 0.4% resolution, and hardware write protection - critical for recalibration-critical industrial control, programmable gain amplifiers, and embedded sensor calibration systems requiring long-term setting retention without external EEPROM.

Technical Context

The X9250UV24IZ implements 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 automatically loads DR0 into the WCR, enabling deterministic startup behavior without host initialization.

Its SPI interface supports full-duplex communication at up to 2MHz, with dedicated HOLD and WP pins for bus arbitration and write protection. The device operates across −40°C to +85°C with separate analog supplies (V+/V−) decoupled from digital VCC, enabling true bipolar operation and minimizing ground loop interference in mixed-signal applications.

Key Specifications

Pinout & Package

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

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/SL, the X9250UV24IZ uniquely combines 100kΩ resistance, dual V+/V− analog supplies, and 100-year nonvolatile storage - making it the only option for recalibration-critical bipolar signal chains requiring zero-maintenance field longevity.

Availability

X9250UV24IZ is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifiers, and motor drive current limit tuning requiring stable component supply and long-term parameter retention.

Supply support for X9250UV24IZ 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 X9250UV24IZ belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in recalibration-critical analog systems requiring nonvolatile setting retention and true bipolar operation.

FAQ

What is the operating voltage range for analog supplies on the X9250UV24IZ?

The X9250UV24IZ supports dual analog supplies: V+ ranges from +2.7V to +5.5V and V− ranges from −2.7V to −5.5V. This enables true bipolar operation for analog signal conditioning in ±3.3V or ±5V systems. The digital VCC supply operates independently from 2.7V to 5.5V, allowing flexible power domain partitioning. All analog pin voltages must remain within V− and V+ at all times.

How does nonvolatile storage work in the X9250UV24IZ?

The X9250UV24IZ contains four 8-bit nonvolatile Data Registers (DR0–DR3) per potentiometer. Writing to these registers initiates an internal 5–10ms high-voltage write cycle, triggered by CS going HIGH after the write sequence. Upon power-up, DR0 automatically loads into the volatile Wiper Counter Register (WCR), restoring the last saved wiper position without MCU intervention. Data retention is guaranteed for 100 years.

Can the X9250UV24IZ be used as a two-terminal variable resistor?

Yes, the X9250UV24IZ can operate as a two-terminal variable resistor by connecting either VH/RH or VL/RL to the wiper VW/RW, leaving the other terminal open or grounded. This configuration is commonly used in programmable current sources, LED brightness control, and RC timing networks. Wiper resistance is 40Ω typical at 5V, minimizing impact on low-impedance paths.

What is the maximum SPI clock frequency supported by the X9250UV24IZ?

The X9250UV24IZ supports SPI clock frequencies up to 2.0MHz, with minimum cycle time of 500ns, high-time of 200ns, and low-time of 200ns. Setup and hold times for SI, SCK, CS, and HOLD are 50ns and 75ns respectively. These timing parameters ensure reliable communication with standard microcontrollers including ARM Cortex-M and PIC families without requiring special clock dividers or wait states.

How many devices can share the same SPI bus with the X9250UV24IZ?

Up to four X9250UV24IZ devices can share a single SPI bus using the A0 and A1 address pins to configure unique 2-bit slave addresses. Each device compares incoming address bits against its physical A0/A1 state; only the matching device responds to commands. This eliminates the need for individual chip-select lines and simplifies routing in multi-channel calibration systems.