Renesas X9258UV24IZ-2.7

Overview

X9258UV24IZ-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, and 2-wire I²C-compatible interface. It integrates four independent 50kΩ resistor arrays, each with volatile wiper counter registers and four nonvolatile data registers, enabling precise programmable gain/offset control in mixed-signal front-ends.

For engineers reviewing the X9258UV24IZ-2.7 datasheet, X9258UV24IZ-2.7 pinout, X9258UV24IZ-2.7 application, or X9258UV24IZ-2.7 equivalent, this device supports low-noise analog trimming in battery-powered instrumentation, multi-channel sensor signal conditioning, and digitally reconfigurable filter tuning where supply headroom is constrained to 2.7V minimum.

Technical Context

The X9258UV24IZ-2.7 implements four independent 255-segment resistor ladders with CMOS switch-based wiper selection controlled by an 8-bit Wiper Counter Register (WCR). Each channel supports direct WCR write, register-to-WCR transfer, and real-time increment/decrement via SCL edge-triggered commands.

Its 2-wire interface operates at up to 400kHz with ACK polling for nonvolatile writes, while hardware write protection (WP pin) disables DR programming. Power-up automatically loads DR0 into each WCR, and standby current remains below 5µA total across all four channels.

Key Specifications

Pinout & Package

24-lead TSSOP (4.4mm body width, MDP0044 package drawing), RoHS-compliant, moisture sensitivity level (MSL) 3 per JEDEC J-STD-020.

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 X9258UV24IZ-2.7 uniquely supports true bipolar analog signal conditioning via independent V+/V− rails and delivers lower wiper resistance for precision feedback applications - critical where op-amp stability or THD performance is constrained.

Availability

X9258UV24IZ-2.7 is available at Aetrix Electronics and suitable for instrumentation calibration, sensor biasing, active filter tuning, and battery-powered audio systems requiring stable component supply with guaranteed long-term availability.

Supply support for X9258UV24IZ-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 X9258 product line delivers digitally programmable precision analog functions - specifically quad digital potentiometers with nonvolatile storage and dual-supply operation - targeting high-reliability signal conditioning in resource-constrained embedded systems.

FAQ

What is the absolute maximum voltage rating for the V+ and V− pins of the X9258UV24IZ-2.7?

The X9258UV24IZ-2.7 specifies absolute maximum ratings of +10V on V+ and −10V on V−, with a maximum differential voltage (V+ − V−) of 12V. Operation beyond these limits risks permanent damage. The recommended operating range remains ±2.7V to ±5.5V per the datasheet, and the X9258UV24IZ-2.7 must never be subjected to voltages exceeding the absolute maximums even momentarily during power sequencing.

Does the X9258UV24IZ-2.7 support true I²C compliance, including clock stretching and arbitration?

The X9258UV24IZ-2.7 implements a 2-wire serial interface compatible with I²C protocol timing (400kHz max, proper START/STOP/ACK sequences), but it does not support clock stretching or multi-master arbitration. It operates strictly as a slave device with fixed slave address format (0101xxxx). The X9258UV24IZ-2.7 relies on ACK polling for nonvolatile write completion rather than clock stretching, and requires a single master on the bus.

How does the WP (Write Protect) pin function on the X9258UV24IZ-2.7, and what happens when it is asserted?

On the X9258UV24IZ-2.7, the WP pin is active-low: when pulled to VSS (GND), it disables all nonvolatile writes to the four Data Registers (DR0–DR3) per channel. Volatile operations - including Wiper Counter Register (WCR) writes and increment/decrement commands - remain fully functional. The X9258UV24IZ-2.7 continues normal analog operation; only persistent storage of new wiper positions is blocked until WP is deasserted (high or floating).

Can the X9258UV24IZ-2.7 be used with only a single positive supply, such as +5V on V+, and ground on V−?

No - the X9258UV24IZ-2.7 requires both V+ and V− to be biased within their specified ranges (±2.7V to ±5.5V) for correct analog section operation. Connecting V− to ground violates the absolute minimum rating of −2.7V and will prevent proper wiper switching across the resistor array. The X9258UV24IZ-2.7 is designed exclusively for true dual-supply analog signal paths; unipolar use requires external level-shifting circuitry.

What is the wiper response time for the X9258UV24IZ-2.7 after issuing a Write Wiper Counter Register command?

After issuing a Write Wiper Counter Register command to the X9258UV24IZ-2.7, the wiper settles to its new position within 10µs (tWRL), as specified in the DCP Timing table. This delay reflects internal decoding and switch activation latency and is independent of supply voltage or temperature within the operating range. The X9258UV24IZ-2.7 guarantees this response time applies to all four channels simultaneously.