Renesas X95820WV14I-2.7T1

Overview

X95820WV14I-2.7T1 from Intersil is a dual digital controlled potentiometer (XDCP™) IC implementing two independent 256-tap, 10kΩ CMOS resistor networks with I²C interface, wiper registers, and non-volatile initial value storage-used for precision voltage divider or rheostat functions in analog signal conditioning, sensor calibration, and programmable gain control circuits.

For engineers reviewing the X95820WV14I-2.7T1 datasheet, X95820WV14I-2.7T1 pinout, X95820WV14I-2.7T1 application, or X95820WV14I-2.7T1 equivalent, key selection criteria include its 10kΩ end-to-end resistance, ±0.5 LSB DNL in voltage divider mode, 70Ω typical wiper resistance at 3.3V, 2.7–5.5V supply range, and 14-lead TSSOP package with hardware write protection (WP) and three address pins enabling up to eight devices on one I²C bus.

Technical Context

The X95820WV14I-2.7T1 integrates two monolithic DCPs sharing a single I²C slave interface, each with an 8-bit volatile Wiper Register (WR) and a non-volatile Initial Value Register (IVR). At power-up, both WRs are loaded from their respective IVRs, defaulting to 0x80 (mid-scale), and the device enters standby with <5µA ICC.

Its I²C protocol supports standard-mode (400kHz) operation with address pins A0–A2, hardware write protection via active-low WP, and memory-mapped access to WR/IVR and general-purpose registers. The DCPs operate in either three-terminal voltage divider or two-terminal variable resistor mode, with monotonic wiper movement and ratiometric temperature coefficient of ±4 ppm/°C.

Key Specifications

Pinout & Package

Package: 14-lead Thin Shrink Small Outline Plastic (TSSOP), RoHS-compliant, Pb-free plus anneal finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP45HV51-103E/ST, the X95820WV14I-2.7T1 uniquely delivers dual-channel I²C control with hardware write protection and non-volatile startup values in the same 14-lead footprint-reducing firmware complexity and improving system robustness in calibration-critical applications.

Availability

X95820WV14I-2.7T1 is available at Aetrix Electronics and suitable for audio signal conditioning, sensor calibration, programmable gain amplification, and power supply trimming requiring stable component supply and long-term traceability.

Supply support for X95820WV14I-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) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial, communications, and computing markets.

The X95820WV14I-2.7T1 belongs to Intersil's XDCP™ family of digital potentiometers, designed specifically for replacing mechanical pots in high-reliability, programmable analog signal-path applications where non-volatility, low noise, and I²C simplicity are essential.

FAQ

What is the default wiper position of the X95820WV14I-2.7T1 at power-up?

At power-up, the X95820WV14I-2.7T1 loads the contents of its non-volatile Initial Value Registers (IVRs) into the volatile Wiper Registers (WRs), defaulting both DCPs to 0x80 (128 decimal), placing the wipers at mid-scale between RH and RL. This behavior is guaranteed across the full -40°C to +85°C industrial temperature range and occurs within 3ms after VCC exceeds 1.8V.

Does the X95820WV14I-2.7T1 support true 10kΩ end-to-end resistance across temperature?

Yes, the X95820WV14I-2.7T1 specifies ±20% resistance tolerance at 25°C and exhibits a resistance temperature coefficient (TCR) of ±45 ppm/°C in rheostat mode. Measured end-to-end resistance change remains within ±1.5% over -40°C to +85°C at 5.5V, confirming stable 10kΩ operation in real-world thermal environments.

Can the X95820WV14I-2.7T1 be used in a 2-wire rheostat configuration?

Yes, the X95820WV14I-2.7T1 supports two-terminal rheostat operation: connect RH to the signal source and RW to the load (leaving RL open), or RL to ground and RW to the load (leaving RH open). Each DCP delivers monotonic resistance from ~70Ω (wiper at extreme) to 10kΩ (wiper at opposite end), with ≤0.5 LSB DNL ensuring predictable step response.

How does hardware write protection (WP pin) affect I²C communication on the X95820WV14I-2.7T1?

When the WP pin is pulled LOW, the X95820WV14I-2.7T1 ignores all incoming I²C write commands-including volatile and non-volatile register writes-and responds with no ACK. Read operations remain fully functional. This provides fail-safe register locking independent of firmware state, critical for protecting calibrated settings in deployed systems.

What is the maximum capacitive load the X95820WV14I-2.7T1 I²C bus can drive?

The X95820WV14I-2.7T1 supports total SDA/SCL bus capacitance up to 400pF, with rise/fall times specified at ≤250ns. For 400pF loading, external pull-up resistors should be 2–2.5kΩ; for 40pF, 15–20kΩ is recommended. Exceeding 400pF may violate tR/tF timing and cause communication failures at 400kHz.