Renesas X95840WV20IZ-2.7T1

Overview

X95840WV20IZ-2.7T1 from Intersil is a quad digital controlled potentiometer (XDCP™) IC implementing four independent 256-tap, 10kΩ resistor networks with I²C interface, wiper register volatility, non-volatile initial value storage, and 70Ω typical wiper resistance at 3.3V - used for precision analog trimming in sensor signal conditioning circuits.

For engineers reviewing the X95840WV20IZ-2.7T1 datasheet, X95840WV20IZ-2.7T1 pinout, X95840WV20IZ-2.7T1 application, or X95840WV20IZ-2.7T1 equivalent, key selection factors include its 20-lead TSSOP package, I²C addressability via A0–A2 pins, hardware write protection (WP), and guaranteed 2.7V to 5.5V operation with <5µA standby current.

Technical Context

The X95840WV20IZ-2.7T1 integrates four monolithic CMOS DCPs sharing a single I²C slave interface, each with independent volatile Wiper Registers (WR) and non-volatile Initial Value Registers (IVR). Power-up behavior loads IVR contents into corresponding WRs, defaulting to 0x80 (mid-scale) if unprogrammed.

It implements resistor ladder + CMOS switch architecture with three-terminal potentiometer or two-terminal rheostat configurations. Wiper position is controlled by 8-bit WR values (0x00–0xFF), delivering 0.4% resolution and monotonicity across all taps, with ratiometric temperature coefficient of ±4 ppm/°C in voltage divider mode.

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 lead 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 X95840WV20IZ-2.7T1 uniquely delivers quad 10kΩ channels, I²C compatibility, sub-70Ω wiper resistance, and guaranteed non-volatile power-on recall - making it optimal for compact, self-initializing analog calibration systems.

Availability

X95840WV20IZ-2.7T1 is available at Aetrix Electronics and suitable for temperature sensor calibration, programmable gain amplifiers, audio volume control, and power supply trim requiring stable component supply across industrial and embedded production cycles.

Supply support for X95840WV20IZ-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 designer specializing in precision analog, power management, and interface ICs with ISO9001-certified manufacturing.

The X95840 series was developed to replace mechanical potentiometers in automated calibration systems, targeting industrial sensing, test equipment, and programmable analog front-ends where reliability, repeatability, and digital configurability are essential.

FAQ

What is the function of the WP pin on the X95840WV20IZ-2.7T1?

The WP (Write Protect) pin on the X95840WV20IZ-2.7T1 is an active-low hardware lock that disables all I²C write operations-including volatile and non-volatile register updates-when pulled LOW. When WP is HIGH, writes proceed normally. This prevents accidental corruption of calibration settings during system operation or firmware updates, and is especially critical for preserving non-volatile IVR values in deployed equipment.

Does the X95840WV20IZ-2.7T1 retain wiper settings after power cycling?

Yes, the X95840WV20IZ-2.7T1 retains wiper settings after power cycling via its non-volatile Initial Value Registers (IVRs). At power-up, the device automatically loads the stored IVR values into the volatile Wiper Registers (WRs), restoring the last-saved position for each of the four DCPs. The IVRs are rated for 50 years of data retention at ≤75°C and withstand 150,000 write cycles - ensuring long-term calibration stability without host intervention.

Can the X95840WV20IZ-2.7T1 operate from a 2.7V supply?

Yes, the X95840WV20IZ-2.7T1 is fully specified for operation from 2.7V to 5.5V. Its "-2.7" suffix explicitly denotes 2.7V minimum supply rating. At 2.7V, it maintains 400kHz I²C compliance, <5µA standby current, 70Ω typical wiper resistance, and monotonic 256-tap performance - enabling direct use in low-voltage battery-powered systems such as portable sensors and IoT edge nodes without level-shifting circuitry.

How many I²C addresses can be assigned to the X95840WV20IZ-2.7T1?

The X95840WV20IZ-2.7T1 supports eight unique I²C slave addresses using the A0, A1, and A2 pins. These three address bits combine with the fixed 1010 prefix to form a 7-bit address (bits 7–1), allowing up to eight X95840WV20IZ-2.7T1 devices on a single I²C bus. Each device responds only to its configured address, enabling scalable multi-channel calibration architectures without address conflict.

What is the maximum wiper current rating for the X95840WV20IZ-2.7T1?

The X95840WV20IZ-2.7T1 has a maximum wiper current rating of ±3.0mA per DCP, as specified in the Absolute Maximum Ratings table. Exceeding this limit risks irreversible damage to the internal CMOS switches. For safe operation in rheostat mode, ensure the voltage across RW–RL or RW–RH does not exceed 30mV (at 10kΩ) or the current remains within ±3.0mA - verified by calculating I = V/R based on applied terminal voltages.