Renesas ISL22323TFV14Z-TK

Overview

ISL22323TFV14Z-TK from Renesas (formerly Intersil) is a dual digitally controlled potentiometer (XDCP) with 256-tap resolution, I²C interface, and non-volatile wiper position storage. It features dual supply operation (VCC = 2.25–5.5V, V− = −2.25 to −5.5V), 100kΩ total resistance per DCP, and operates across −40°C to +125°C for industrial signal conditioning and bias adjustment.

For engineers reviewing the ISL22323TFV14Z-TK datasheet, ISL22323TFV14Z-TK pinout, ISL22323TFV14Z-TK application, or ISL22323TFV14Z-TK equivalent, this page delivers verified specifications, TSSOP-14 package details, dual-rail analog control capability, EEPROM endurance (1M cycles), and real-world use cases in programmable gain stages and bipolar offset trimming.

Technical Context

The ISL22323TFV14Z-TK integrates two independent 8-bit digitally controlled potentiometers on a single monolithic CMOS die, each with volatile Wiper Registers (WR0/WR1) and non-volatile Initial Value Registers (IVR0/IVR1). Wiper positions are updated via I²C commands with make-before-break switching, and power-up recalls IVR contents into WR registers.

It supports dual-supply operation enabling true bipolar voltage range across DCP terminals (V− to VCC), and includes 13 general-purpose non-volatile registers for lookup tables or configuration storage. The I²C interface complies with standard-mode timing (400kHz max), uses three address pins (A0–A2) for up to eight devices per bus, and features open-drain SDA/SCL with internal logic-level thresholds.

Key Specifications

Pinout & Package

ISL22323TFV14Z-TK is housed in a 14-lead TSSOP (RoHS-compliant, JEDEC MO-153, package drawing M14.173) with exposed thermal pad internally connected to V−.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ100 and MCP4651T-104E/ST, the ISL22323TFV14Z-TK uniquely supports dual-supply operation (V− to VCC), enabling true bipolar analog control essential for precision instrumentation and motor drive bias networks - a capability absent in both alternatives.

Availability

ISL22323TFV14Z-TK is available at Aetrix Electronics and suitable for industrial motor control, automotive cabin electronics, and precision test equipment requiring stable component supply, long-term calibration retention, and extended temperature operation.

Supply support for ISL22323TFV14Z-TK 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 acquired Intersil in 2017 and maintains its high-performance analog portfolio, emphasizing precision, reliability, and industrial-grade qualification.

The ISL22323TFV14Z-TK belongs to Renesas' XDCP (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical trimmers in harsh-environment systems requiring programmable analog tuning with non-volatile memory and wide temperature support.

FAQ

What is the function of the V− pin on the ISL22323TFV14Z-TK?

The V− pin is a dedicated negative supply rail that enables true bipolar operation of both DCPs. When V− is biased below GND (e.g., −5V), the RH/RL/RW terminals can swing across the full range from V− to VCC - allowing the ISL22323TFV14Z-TK to serve as a programmable bipolar attenuator or offset injector without external level-shifting circuitry.

Does the ISL22323TFV14Z-TK retain wiper settings after power loss?

Yes. The ISL22323TFV14Z-TK stores wiper positions in non-volatile Initial Value Registers (IVR0/IVR1). At power-up, these values are automatically loaded into volatile Wiper Registers (WR0/WR1), restoring the last-saved tap positions. This behavior is guaranteed across 50 years of data retention at ≤+55°C and 1 million write cycles.

Can the ISL22323TFV14Z-TK operate with only a single positive supply?

No. The ISL22323TFV14Z-TK requires both VCC and V− supplies to function. Its architecture relies on dual-rail operation for proper CMOS switch biasing and resistor array integrity. Operating with V− unconnected or tied to GND violates Absolute Maximum Ratings and may cause latch-up or parametric failure.

How many devices can share the same I²C bus with the ISL22323TFV14Z-TK?

Up to eight ISL22323TFV14Z-TK devices can coexist on one I²C bus. This is enabled by three hardware address pins (A0, A1, A2), each configurable as logic high or low to generate unique 3-bit address suffixes within the base 7-bit slave address (1010xxxR/W). No software address assignment is required.

What is the maximum allowable capacitive load on the SDA and SCL lines for reliable I²C communication with the ISL22323TFV14Z-TK?

The ISL22323TFV14Z-TK specifies a maximum bus capacitance (Cb) of 400pF for SDA and SCL. With 400pF loading, pull-up resistors should be ≤2.5kΩ to meet rise/fall time requirements (tR/tF ≤ 250ns). For lower capacitance (e.g., 40pF), pull-ups up to 20kΩ are acceptable - ensuring compatibility with long traces or multi-drop configurations.