Renesas X9258UV24-2.7

Overview

X9258UV24-2.7 from Intersil (now Renesas) is a quad digital potentiometer IC with 256-tap resolution per channel, dual ±2.7V to ±5.5V analog supplies, 2-wire I²C-compatible interface, and nonvolatile wiper position storage in four data registers per pot. It operates as a precision 3-terminal potentiometer or 2-terminal variable resistor in analog signal conditioning circuits requiring low-noise, low-power, and stable resistance trimming.

For engineers reviewing the X9258UV24-2.7 datasheet, X9258UV24-2.7 pinout, X9258UV24-2.7 application, or X9258UV24-2.7 equivalent, key selection criteria include its 50kΩ end-to-end resistance, -40°C to +85°C industrial temperature range, TSSOP-24 package, 2.7V–5.5V VCC compatibility, and hardware write-protect (WP) functionality for register integrity.

Technical Context

The X9258UV24-2.7 implements four independent 255-element resistor arrays with CMOS switch-controlled wipers, each driven by an 8-bit volatile Wiper Counter Register (WCR). Wiper position is set via direct write, register transfer (DR→WCR), or real-time increment/decrement using SCL clock edges while holding SDA high/low.

It supports full 2-wire bus protocol compliance including start/stop conditions, acknowledge polling during nonvolatile writes (tWR = 5–10 ms), and slave addressing with A0–A3 pins enabling up to 16 devices on one bus. Power-up automatically loads DR0 into each WCR, ensuring repeatable startup behavior without host intervention.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm body width, MDP0044 drawing), RoHS-compliant, moisture sensitivity level (MSL) per device information page.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/SL, the X9258UV24-2.7 uniquely supports independent V+/V− analog rails for bipolar signal conditioning, includes hardware write protection, and offers guaranteed 100-year data retention-making it optimal for industrial and medical applications demanding long-term calibration integrity.

Availability

X9258UV24-2.7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, medical instrument calibration, and telecom laser biasing requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9258UV24-2.7 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 (formerly Intersil) is a global semiconductor leader specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The X9258UV24-2.7 belongs to the XDCP™ (eXternally Controlled Digital Potentiometer) family, designed specifically for high-reliability analog trimming in systems requiring nonvolatile storage, bipolar operation, and robust I²C-based configuration.

FAQ

What is the operating temperature range for the X9258UV24-2.7?

The X9258UV24-2.7 is rated for operation from -40°C to +85°C, making it suitable for industrial environments and embedded systems exposed to wide ambient temperature swings. This rating applies across its full specified supply ranges (VCC = 2.7V–5.5V, V+ = +2.7V–+5.5V, V− = −2.7V–−5.5V) and is validated per the FN8168 Rev 6.00 datasheet. The X9258UV24-2.7 maintains specified linearity, wiper resistance, and nonvolatile write performance throughout this range.

Does the X9258UV24-2.7 support true bipolar analog operation?

Yes, the X9258UV24-2.7 supports true bipolar analog operation via dedicated V+ and V− supply pins, each independently configurable from ±2.7V to ±5.5V. This allows the resistor arrays to handle AC signals centered at ground or DC signals spanning negative to positive voltages - unlike single-supply digital pots. The X9258UV24-2.7's VH/VL terminals must remain within these rail limits, and wiper voltage (VW) follows linear interpolation between them.

How does the hardware write-protect (WP) pin function on the X9258UV24-2.7?

The WP pin on the X9258UV24-2.7 is an active-low input that disables all nonvolatile writes to the four Data Registers (DR0–DR3) when pulled low. While WP is asserted, commands like Write Data Register or XFR WCR→DR are ignored - preserving factory or field-calibrated values. The X9258UV24-2.7 continues to support volatile operations (e.g., Write WCR, Increment/Decrement) regardless of WP state. This provides tamper-resistant calibration without firmware dependencies.

What is the resolution and linearity performance of the X9258UV24-2.7?

The X9258UV24-2.7 provides 256-tap resolution (0.4% step size) per 50kΩ potentiometer, with ±1 MI absolute linearity error and ±0.6 MI relative linearity error (MI = RTOTAL/255). These specifications are guaranteed over the full -40°C to +85°C range and ensure predictable voltage division in precision analog circuits. The X9258UV24-2.7 achieves this via laser-trimmed resistor arrays and low-drift CMOS switches, not interpolation or digital averaging.

Can the X9258UV24-2.7 be used with a 3.3V-only system?

Yes, the X9258UV24-2.7 supports VCC = 2.7V–5.5V, so it operates fully with a 3.3V digital supply. However, its analog section requires separate V+ and V− supplies - which may also be set to +3.3V and -3.3V respectively for bipolar operation, or +3.3V and 0V for unipolar use. In the latter case, VL pins connect to ground and VH pins to +3.3V; the X9258UV24-2.7 remains functional but loses true bipolar capability.