Renesas X9251UV24Z-2.7

Overview

X9251UV24Z-2.7 from Renesas Electronics is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution, SPI interface, 50kΩ end-to-end resistance, 2.7V–5.5V single-supply operation, and nonvolatile data register storage. It functions as four independent programmable resistors or voltage dividers in analog signal conditioning, gain/offset trimming, and DC bias control circuits.

For engineers reviewing the X9251UV24Z-2.7 datasheet, X9251UV24Z-2.7 pinout, X9251UV24Z-2.7 application, or X9251UV24Z-2.7 equivalent, this device supports precise digital calibration of amplifier gain, sensor reference voltages, regulator output, and RF bias points - with verified 0.4% resolution, <5µA standby current, and 100-year data retention.

Technical Context

The X9251UV24Z-2.7 integrates four independent DCP cores on a monolithic CMOS IC, each comprising 256 resistor elements and CMOS switches controlled by an 8-bit volatile Wiper Counter Register (WCR). Each DCP has four nonvolatile 8-bit Data Registers (DR00–DR03 per channel) for persistent wiper position storage.

It implements a full SPI-3-wire interface (CS, SCK, SI/SO) with device addressing via A0/A1 pins, hardware write protection (WP), and HOLD for serial bus pause. Power-up loads DR#0 values into corresponding WCRs, enabling deterministic startup behavior without host initialization.

Key Specifications

Pinout & Package

24-lead TSSOP (4.4mm body width, Pb-free, RoHS-compliant) with exposed pad not electrically connected. Pin 1 marked by dot; pin numbering follows standard top-view counterclockwise convention.

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 X9251UV24Z-2.7 uniquely combines 50kΩ resistance, 100k-cycle endurance, 100-year data retention, and HOLD functionality - making it optimal for field-deployed equipment requiring unattended recalibration and long-term parameter persistence.

Availability

X9251UV24Z-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical instrument trimming, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9251UV24Z-2.7 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

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, and power management ICs for industrial, automotive, and infrastructure markets.

The X9251UV24Z-2.7 belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in precision analog systems where programmability, reliability, and long-term calibration stability are essential.

FAQ

What is the operating voltage range of the X9251UV24Z-2.7?

The X9251UV24Z-2.7 operates from 2.7V to 5.5V, supporting direct connection to 3.3V and 5V logic systems without level translation. This range is explicitly defined in the ordering information table and confirmed in the Recommended Operating Conditions section of the datasheet (FN8166 Rev 7.00, Page 12).

How many independent potentiometers does the X9251UV24Z-2.7 contain?

The X9251UV24Z-2.7 integrates four completely independent digitally controlled potentiometers (DCPs) on a single die, each with dedicated RH, RL, and RW pins, plus associated Wiper Counter and Data Registers - as confirmed in the Functional Diagram (Figure 1), Pin Descriptions, and Features list of the datasheet.

Does the X9251UV24Z-2.7 retain wiper settings after power loss?

Yes - the X9251UV24Z-2.7 retains wiper positions in nonvolatile Data Registers (DR#0–DR#3) with 100-year data retention. At power-up, the device automatically loads DR#0 values into the volatile Wiper Counter Registers (WCRs), ensuring repeatable startup behavior without host intervention.

Can multiple X9251UV24Z-2.7 devices share the same SPI bus?

Yes - the X9251UV24Z-2.7 uses A0 and A1 pins to configure its 2-bit slave address, allowing up to four devices on a single SPI bus. The Identification Byte format (Table 3) and Instruction Byte description (Table 4) confirm address decoding based on these pins, with no address collision risk when pins are uniquely set.

What is the maximum SPI clock frequency supported by the X9251UV24Z-2.7?

The X9251UV24Z-2.7 supports a maximum SPI clock frequency of 2 MHz, as specified in the AC Timing table (Page 14, fSCK MIN/MAX). This is validated across all instruction types including Read/Write WCR and DR operations, and aligns with standard MCU SPI peripheral capabilities.