Renesas X95840UV20IZ-2.7T1

Overview

X95840UV20IZ-2.7T1 from Intersil is a quad digital controlled potentiometer (XDCP™) IC with 50kΩ total resistance per channel, 256-tap I²C interface, non-volatile initial value registers, and 20-lead TSSOP packaging. It operates from 2.7V to 5.5V, delivers <5µA standby current, and serves as precision programmable resistors in analog signal conditioning circuits for industrial sensor interfaces and audio level control.

For engineers reviewing the X95840UV20IZ-2.7T1 datasheet, X95840UV20IZ-2.7T1 pinout, X95840UV20IZ-2.7T1 application, or X95840UV20IZ-2.7T1 equivalent, key selection criteria include I²C address configurability (A0–A2), hardware write protection (WP), wiper resistance (70Ω typ), and guaranteed monotonicity in both voltage divider and rheostat modes across –40°C to +85°C.

Technical Context

The X95840UV20IZ-2.7T1 integrates four independent digitally controlled potentiometers on a monolithic CMOS die, each with volatile Wiper Registers (WR) and non-volatile Initial Value Registers (IVR). Its I²C slave interface supports up to eight devices per bus via A0–A2 address pins and includes hardware write protection via active-low WP.

Each DCP implements resistor ladders with CMOS switches; wiper position is set by an 8-bit WR (0x00–0xFF), enabling 0.4% resolution. At power-up, IVR contents load into WRs, and the device defaults to mid-scale (0x80) until recalled - ensuring repeatable startup behavior without host intervention.

Key Specifications

Pinout & Package

Package: 20-lead TSSOP (Thin Shrink Small Outline Package), RoHS-compliant Pb-free plus anneal finish, 6.5mm × 4.4mm body, 0.65mm pitch.

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 X95840UV20IZ-2.7T1 offers native I²C support with configurable addressing, integrated hardware write protection, and guaranteed monotonicity - reducing firmware complexity and improving robustness in multi-device analog control systems.

Availability

X95840UV20IZ-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, audio signal level control, programmable power supply trim, and medical instrument gain setting requiring stable component supply and long-term lifecycle continuity.

Supply support for X95840UV20IZ-2.7T1 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 Corporation (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X95840 product line delivers digitally programmable analog components targeting systems needing field-calibratable, non-volatile, and I²C-configurable resistance networks - especially in industrial, medical, and test equipment where repeatability and reliability are critical.

FAQ

What is the total resistance and resolution of the X95840UV20IZ-2.7T1?

The X95840UV20IZ-2.7T1 features four independent 50kΩ digital potentiometers, each with 256 linearly spaced taps (8-bit resolution), delivering 0.4% step resolution. This allows precise analog tuning in voltage divider or rheostat configurations without external scaling components. The resistance tolerance is ±20%, and ratiometric temperature coefficient is ±4 ppm/°C - ensuring stable division ratios across temperature.

Does the X95840UV20IZ-2.7T1 retain wiper settings after power cycling?

Yes, the X95840UV20IZ-2.7T1 retains wiper startup values using non-volatile Initial Value Registers (IVRs). At power-up, the device automatically loads the stored IVR values into the volatile Wiper Registers (WRs), ensuring repeatable behavior without host intervention. Each IVR supports 150,000 write cycles and 50-year data retention at ≤75°C - meeting long-life industrial deployment requirements.

How does the WP pin function on the X95840UV20IZ-2.7T1?

The WP (Write Protect) pin on the X95840UV20IZ-2.7T1 is an active-low hardware lock that disables all I²C write operations when pulled LOW. When WP is HIGH, normal read/write access to volatile and non-volatile registers is enabled. This feature prevents accidental register corruption during firmware updates, ESD events, or brown-out conditions - enhancing system reliability in mission-critical analog control paths.

Can multiple X95840UV20IZ-2.7T1 devices share the same I²C bus?

Yes, up to eight X95840UV20IZ-2.7T1 devices can operate on a single I²C bus using the A0, A1, and A2 address pins to configure unique 7-bit slave addresses (0x50–0x57). Each device responds only to its assigned address, enabling coordinated control of 32 independent DCP channels from one microcontroller - ideal for multi-channel instrumentation or modular analog signal processing systems.

What is the maximum wiper current rating for the X95840UV20IZ-2.7T1?

The X95840UV20IZ-2.7T1 specifies a maximum wiper current of ±3.0mA per DCP channel under recommended operating conditions. Exceeding this limit risks thermal overstress or long-term reliability degradation. For rheostat-mode use, ensure the applied voltage across RW–RL or RW–RH does not exceed 5mW power dissipation per DCP - corresponding to ≤22.4V across 50kΩ at full scale.