Renesas X9258US24IZ-2.7T2

Overview

X9258US24IZ-2.7T2 from Renesas (formerly Intersil) is a quad digital potentiometer IC integrating four 256-tap resistor arrays with volatile wiper counters and nonvolatile data registers, operating from dual analog supplies (±2.7V to ±5.5V) and digital supply (2.7V–5.5V), used for precision gain/offset trimming in mixed-signal instrumentation and programmable biasing in industrial sensor interfaces.

For engineers reviewing the X9258US24IZ-2.7T2 datasheet, X9258US24IZ-2.7T2 pinout, X9258US24IZ-2.7T2 application, or X9258US24IZ-2.7T2 equivalent, key selection criteria include 2-wire interface compatibility, ±2.7V to ±5.5V analog rail support, 50kΩ end-to-end resistance, 0.4% resolution, and hardware write-protect (WP) functionality for register integrity in field-deployed systems.

Technical Context

The X9258US24IZ-2.7T2 implements four independent 255-segment resistor arrays with CMOS switch-based wiper control, each driven by an 8-bit volatile Wiper Counter Register (WCR) and backed by four 8-bit nonvolatile Data Registers (DR0–DR3). Power-up loads DR0 into each WCR, enabling deterministic startup behavior without host initialization.

Its 2-wire (I²C-compatible) interface supports slave addressing via A0–A3 pins (up to 16 devices on bus), with instruction set including direct WCR read/write, DR↔WCR transfers, global register operations, and real-time increment/decrement mode synchronized to SCL edges - all while maintaining <5µA standby current and supporting 400kHz clock frequency.

Key Specifications

Pinout & Package

24-lead SOIC (300 mil) package with exposed pad not present; RoHS-compliant matte tin finish; MSL Level 3 per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/P, the X9258US24IZ-2.7T2 uniquely supports true bipolar analog operation with independent V+/V− rails, hardware write protection, and 2-wire interface - making it the only option for robust, isolated, mixed-signal trimming in industrial and medical systems.

Availability

X9258US24IZ-2.7T2 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical instrumentation offset control, and programmable power supply trim requiring stable component supply with guaranteed long-term availability.

Supply support for X9258US24IZ-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

Renesas Electronics Corporation (formerly Intersil) is a global semiconductor leader specializing in microcontrollers, analog power, and mixed-signal solutions for industrial, automotive, and communications markets.

The X9258 product line delivers digitally programmable analog functions with nonvolatile memory and robust interface protocols - designed specifically for precision calibration, sensor conditioning, and adaptive biasing in harsh-environment electronics.

FAQ

What is the absolute maximum voltage rating for the V+ and V− pins of the X9258US24IZ-2.7T2?

The X9258US24IZ-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 to the internal resistor arrays and analog switches. The recommended operating range remains ±2.7V to ±5.5V per the -2.7 suffix designation.

Does the X9258US24IZ-2.7T2 support true I²C protocol compliance, including clock stretching and multi-master arbitration?

The X9258US24IZ-2.7T2 implements a 2-wire serial interface compatible with I²C electrical signaling (open-drain SDA/SCL, ACK/NACK), but does not support clock stretching or multi-master arbitration. It operates strictly as a slave device with fixed 8-bit address format (0101xxxx), requiring master-controlled timing and exclusive bus access.

How does the hardware write-protect (WP) pin function on the X9258US24IZ-2.7T2, and what happens when it is asserted during power-up?

When WP is held LOW, the X9258US24IZ-2.7T2 disables all nonvolatile writes to its Data Registers (DR0–DR3), though volatile WCR updates remain functional. During power-up, WP state is sampled after supplies stabilize; if WP is LOW at that moment, DR writes remain blocked until WP is deasserted - preserving factory calibration even during brown-out recovery.

Can the X9258US24IZ-2.7T2 be used with only a single positive supply (e.g., VCC = 3.3V, V+ = 3.3V, V− = 0V) instead of dual rails?

Yes - the X9258US24IZ-2.7T2 supports unipolar operation: V+ may be tied to VCC (e.g., 3.3V) and V− to VSS (0V), enabling use as a standard 0–3.3V digital potentiometer. In this configuration, VH pins operate at V+, VL pins at V−, and wiper voltage ranges linearly between them - retaining full 256-step resolution and nonvolatile storage.

What is the wiper response time for the X9258US24IZ-2.7T2 after issuing a Write Wiper Counter Register command?

After issuing a Write Wiper Counter Register command, the X9258US24IZ-2.7T2 completes wiper repositioning within 10µs (tWRL), as specified in the DCP Timing table. This delay reflects internal decoding and switch settling - independent of supply voltage or temperature across the −40°C to +85°C operating range.