Renesas ISL22349UFV14Z

Overview

ISL22349UFV14Z from Renesas (formerly Intersil) is a quad digitally controlled potentiometer (XDCP™) with I²C interface, 128-tap resolution, non-volatile initial value registers, and 50 kΩ end-to-end resistance. It operates from 2.7V to 5.5V and supports automotive-grade temperature range (–40°C to +125°C), enabling precise analog voltage division in sensor calibration and power supply trimming circuits.

For engineers reviewing the ISL22349UFV14Z datasheet, ISL22349UFV14Z pinout, ISL22349UFV14Z application, or ISL22349UFV14Z equivalent, this page delivers verified specifications, validated pin functions, real-world use cases, and confirmed alternative parts for embedded analog control design.

Technical Context

The ISL22349UFV14Z integrates four independent DCPs on a single monolithic CMOS die, each with volatile Wiper Registers (WR) and non-volatile Initial Value Registers (IVR). Wiper position is set via I²C commands using address pins A0–A2, supporting up to eight devices per bus.

Each DCP implements resistor arrays with CMOS switches operating in "make-before-break" mode; wiper resistance is 70 Ω typical at 3.3 V, and shutdown mode reduces current to ≤6.5 µA while retaining register access over I²C.

Key Specifications

Pinout & Package

ISL22349UFV14Z uses a 14-lead Pb-free TSSOP (M14.173) package with 0.65 mm pitch, 4.95–5.05 mm body width, and 6.25–6.50 mm body length. Thermal resistance θ_JA = 100°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL22349UFV14Z, ISL22346WFV14Z offers lower resistance for current-sensitive applications, while MCP45HV51-502E/ST adds high-voltage wiper tolerance at the cost of I²C compatibility and automatic power-on recall.

Availability

ISL22349UFV14Z is available at Aetrix Electronics and suitable for motor control feedback calibration, programmable power supply trim, sensor signal conditioning, and audio channel balance control requiring stable component supply across automotive and industrial production lifecycles.

Supply support for ISL22349UFV14Z 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

Renesas Electronics Corporation acquired Intersil in 2017 and continues to manufacture, test, and support its precision analog portfolio under ISO9001 quality systems.

The ISL22349UFV14Z belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in automotive, industrial, and communications systems requiring non-volatile, software-configurable analog adjustment.

FAQ

What is the resistance tolerance and temperature coefficient of the ISL22349UFV14Z?

The ISL22349UFV14Z has an end-to-end resistance tolerance of ±20% and a temperature coefficient of ±80 ppm/°C over –40°C to +125°C. These values apply specifically to the 50 kΩ version (U option) and are measured in voltage divider mode with the DCP register set to 40h. The ratiometric temperature coefficient (TCV) is ±4 ppm/°C, ensuring stable divider ratio across temperature.

Does the ISL22349UFV14Z retain wiper settings after power loss?

Yes - the ISL22349UFV14Z stores initial wiper positions in non-volatile Initial Value Registers (IVRs). At power-up, the device automatically recalls these values into the volatile Wiper Registers (WRs), restoring the last programmed positions without host intervention. This behavior is guaranteed across the full –40°C to +125°C operating range.

Can the ISL22349UFV14Z operate with a 3.3 V supply and still meet all specifications?

Yes - the ISL22349UFV14Z is fully specified from 2.7 V to 5.5 V. At 3.3 V, it delivers 70 Ω typical wiper resistance, 400 kHz I²C operation, ≤6.5 µA shutdown current, and full 128-tap functionality. All analog specs including INL (±1 LSB), DNL (±0.5 LSB), and ZS/FS error remain valid per datasheet Table "Analog Specifications".

How does the SHDN pin interact with the ACR register's SHDN bit?

The SHDN pin and SHDN bit in the Access Control Register (ACR) are logically ANDed. Shutdown activates when either the pin is pulled low OR the ACR[6] bit is cleared to 0. In shutdown mode, all DCPs go to open-circuit state and wipers are shorted to GND, but the I²C interface remains active and all registers remain readable/writable.

What is the maximum number of ISL22349UFV14Z devices supported on a single I²C bus?

Up to eight ISL22349UFV14Z devices can share one I²C bus using the A0, A1, and A2 address pins. Each combination of logic levels on these pins sets the three LSBs of the 7-bit slave address (1010xxxR/W), allowing unique addressing without external multiplexing or bus arbitration overhead.