Renesas X95820UV14I-2.7T1

Overview

X95820UV14I-2.7T1 from Intersil is a dual digital controlled potentiometer (XDCP™) IC implementing two independent 256-tap, 50kΩ CMOS resistor networks with I²C interface, wiper registers, and non-volatile initial value storage-used for precision analog voltage division and rheostat control in programmable gain amplifiers, sensor calibration, and DC bias adjustment circuits.

For engineers reviewing the X95820UV14I-2.7T1 datasheet, X95820UV14I-2.7T1 pinout, X95820UV14I-2.7T1 application, or X95820UV14I-2.7T1 equivalent, key selection criteria include I²C address configurability (A0–A2), 2.7V–5.5V supply range, 70Ω typical wiper resistance at 3.3V, ±0.5 LSB differential nonlinearity in voltage divider mode, and industrial temperature operation (−40°C to +85°C).

Technical Context

The X95820UV14I-2.7T1 integrates two monolithic DCPs sharing a single I²C slave interface with hardware write protection (WP), three address pins (A0–A2), and separate RH/RL/RW terminals per channel. Each DCP uses resistor ladder + CMOS switch architecture controlled by an 8-bit volatile Wiper Register (WR) and backed by a non-volatile Initial Value Register (IVR) that loads on power-up.

It operates in two primary modes: voltage divider (RH→VCC, RL→GND, RW→output) and rheostat (RW–RL or RW–RH). Wiper position updates occur within 1 µs of SCL falling edge, and non-volatile writes require 12–20 ms with automatic recall at VCC ≥ 1.8 V. Standby current is <5 µA at 5.5 V.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (Thin Shrink Small Outline Plastic), RoHS-compliant, Pb-free plus anneal finish, body dimensions 4.95 mm × 6.25 mm × 1.05 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP45HV51-503E/ST, the X95820UV14I-2.7T1 uniquely delivers dual-channel I²C control with hardware write protection and guaranteed power-on default values-reducing firmware overhead and improving system robustness in industrial calibration and programmable analog interfaces.

Availability

X95820UV14I-2.7T1 is available at Aetrix Electronics and suitable for programmable gain amplifiers, sensor calibration modules, DC bias adjustment circuits, and audio volume control systems requiring stable component supply and long-term parametric consistency.

Supply support for X95820UV14I-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 precision power management, interface, and signal conditioning applications.

The X95820 series was developed specifically for digitally reconfigurable analog signal paths in industrial, test & measurement, and medical instrumentation-emphasizing non-volatile configuration retention, low wiper resistance, and I²C simplicity.

FAQ

What is the power-on behavior of the X95820UV14I-2.7T1?

At power-up, the X95820UV14I-2.7T1 recalls the contents of its two non-volatile Initial Value Registers (IVRs) into the corresponding volatile Wiper Registers (WRs), placing both wipers at their stored positions. This occurs after VCC exceeds 1.8 V and completes within 3 ms. The default IVR value is 0x80 (mid-scale), so wipers start centered unless previously programmed.

Does the X95820UV14I-2.7T1 support true dual-channel synchronization?

Yes-the X95820UV14I-2.7T1 allows simultaneous write to both DCPs' Wiper Registers using a single I²C transaction targeting addresses 0 and 1. While wiper movement isn't atomic across channels, the 1 µs wiper response time and shared clock domain ensure tightly coupled adjustment for matched gain or offset control.

Can the X95820UV14I-2.7T1 be used in rheostat mode with only two terminals?

Yes-each DCP in the X95820UV14I-2.7T1 supports rheostat configuration: connect RW and RL (or RW and RH) as the two terminals, leaving the third terminal open. Total resistance remains 50 kΩ; wiper resistance is 70 Ω typical, and monotonicity is maintained per datasheet specs (RDNL ≤ ±0.5 MI).

What is the maximum capacitive load the X95820UV14I-2.7T1 I²C bus can drive?

The X95820UV14I-2.7T1 specifies SDA/SCL pin capacitance as 10 pF and supports total bus capacitance up to 400 pF. For 400 pF loads, external pull-up resistors should be ~2–2.5 kΩ; for 40 pF, 15–20 kΩ is recommended to meet rise/fall time specs (tR/tF ≤ 250 ns).

How does hardware write protection (WP pin) interact with I²C commands on the X95820UV14I-2.7T1?

When WP is low, the X95820UV14I-2.7T1 ignores all I²C write operations-including volatile and non-volatile writes-and responds with no ACK. It remains responsive to reads and retains current wiper positions. This provides fail-safe protection against spurious writes during power sequencing or EMI events.