Renesas X95820UV14IZ-2.7

Overview

X95820UV14IZ-2.7 from Intersil is a dual digital controlled potentiometer (XDCP™) with 50kΩ total resistance per channel, 256-tap I²C interface, non-volatile initial value registers, and 14-lead TSSOP package. It operates from 2.7V to 5.5V, delivers <5µA standby current, and supports industrial temperature range (–40°C to +85°C). Used for precision analog trimming in sensor calibration, power supply feedback, and audio level control.

For engineers reviewing the X95820UV14IZ-2.7 datasheet, X95820UV14IZ-2.7 pinout, X95820UV14IZ-2.7 application, or X95820UV14IZ-2.7 equivalent, key selection criteria include dual-channel wiper register independence, I²C address configurability via A0–A2 pins, hardware write protection (WP), and guaranteed 50-year non-volatile data retention at ≤75°C.

Technical Context

The X95820UV14IZ-2.7 integrates two independent digitally controlled potentiometers on a single CMOS die, each with volatile Wiper Registers (WR) and non-volatile Initial Value Registers (IVR). Wiper position is set via I²C commands using an 8-bit address space (0–255), enabling 0.4% resolution per tap. At power-up, IVR contents are automatically loaded into corresponding WRs.

I²C communication uses a 7-bit slave address formed by A2/A1/A0 pins, supporting up to eight devices on one bus. The WP pin provides hardware-level write protection: low state disables all I²C write operations. Each DCP functions as either a three-terminal potentiometer (RH–RW–RL) or two-terminal rheostat (RW–RL or RW–RH).

Key Specifications

Pinout & Package

Package: 14-lead Thin Shrink Small Outline Plastic (TSSOP), RoHS-compliant Pb-free plus anneal finish, JEDEC MO-153-AC compliant.

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 X95820UV14IZ-2.7 uniquely combines dual 50kΩ channels, hardware write protection, and non-volatile power-up recall in an I²C-compatible 14-TSSOP package - reducing BOM count and eliminating post-boot configuration overhead.

Availability

X95820UV14IZ-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, and medical instrument gain adjustment requiring stable component supply and long-term obsolescence mitigation.

Supply support for X95820UV14IZ-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

Intersil Corporation (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for industrial, computing, and communications markets, with ISO 9001-certified manufacturing.

The X95820 family targets precision analog trimming applications where mechanical potentiometers fail due to wear, vibration, or environmental stress - delivering programmable, repeatable, and maintenance-free resistance control.

FAQ

What is the default wiper position of X95820UV14IZ-2.7 at power-up?

At power-up, the X95820UV14IZ-2.7 loads the contents of its non-volatile Initial Value Registers (IVRs) into the volatile Wiper Registers (WRs). Factory-default IVR values are 0x80 (128 decimal), placing both wipers at mid-scale - approximately 25kΩ from RH and RL terminals for the 50kΩ DCPs. This behavior occurs after VCC exceeds Vpor (1.8V min) and completes within 3ms.

Does X95820UV14IZ-2.7 support true dual-channel independent operation?

Yes, X95820UV14IZ-2.7 provides fully independent control of two 50kΩ DCPs. Each has dedicated RH, RL, and RW pins, separate volatile Wiper Registers (WR0/WR1), and individual non-volatile Initial Value Registers (IVR0/IVR1). Writes to one channel do not affect the other, and DCP-to-DCP matching is specified at ±2 LSB for voltage divider mode - confirming functional isolation.

Can X95820UV14IZ-2.7 be used in rheostat (two-terminal) mode?

Yes, X95820UV14IZ-2.7 supports rheostat configuration: connect RH to open or fixed potential, and use RW–RL as a variable resistor. Specified parameters include RINL ≤ ±1 MI, RDNL ≤ ±0.5 MI, and TCR ±45 ppm/°C - all verified in resistor mode. Total power dissipation per DCP is limited to 5mW, and wiper current must stay within ±3.0mA.

How does the WP pin function on X95820UV14IZ-2.7?

The WP pin on X95820UV14IZ-2.7 is an active-low hardware write protection input. When pulled low, it disables all I²C write operations - including volatile register updates and non-volatile IVR programming - regardless of command validity or address match. The device responds with no ACK and enters standby mode. Pulling WP high restores full I²C write capability.

What is the maximum I²C clock frequency supported by X95820UV14IZ-2.7?

X95820UV14IZ-2.7 supports standard-mode I²C up to 400kHz, as confirmed by tLOW ≥1300ns, tHIGH ≥600ns, and fSCL = 400kHz in the Operating Specifications table. It does not support fast-mode plus (1MHz) or high-speed mode. External pull-up resistors must be selected based on bus capacitance (Cb ≤ 400pF) to meet rise/fall time requirements (tR/tF ≤ 250ns).