Renesas ISL22424WFV14Z-TK

Overview

ISL22424WFV14Z-TK from Renesas Electronics (formerly Intersil) is a dual digitally controlled potentiometer (XDCP™) with 256-tap resolution, SPI interface, non-volatile wiper position storage, and dual-supply operation (VCC = 2.25–5.5 V, V− = −2.25 to −5.5 V). It integrates two independent 10 kΩ DCPs in a 14-lead TSSOP package and supports voltage divider or rheostat configurations for precision analog trimming in harsh environments.

For engineers reviewing the ISL22424WFV14Z-TK datasheet, ISL22424WFV14Z-TK pinout, ISL22424WFV14Z-TK application, or ISL22424WFV14Z-TK equivalent, key selection criteria include bipolar supply capability, ±85 ppm/°C end-to-end tempco (W option), 70 Ω typical wiper resistance, shutdown mode (<4 µA), and extended industrial temperature range (−40°C to +125°C).

Technical Context

The ISL22424WFV14Z-TK implements two independent resistor arrays using CMOS-switched ladder networks, each with an 8-bit volatile Wiper Register (WRi) and non-volatile Initial Value Register (IVRi). Wiper positioning follows "make-before-break" switching to prevent open-circuit transients during tap changes.

Its SPI interface operates in Mode 0 (CPOL = 0, CPHA = 0), supporting daisy-chain configuration and read/write access to WRi, IVRi, and 13 general-purpose non-volatile registers. Power-on recall loads IVRi contents into WRi within 5 ms after VCC exceeds 1.9 V.

Key Specifications

Pinout & Package

ISL22424WFV14Z-TK is housed in a 14-lead TSSOP package (M14.173), with exposed pad not present. Pin functions are validated per FN6425 Rev 1.00 datasheet, Page 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42010-I/P, the ISL22424WFV14Z-TK uniquely delivers dual-channel trimming, true bipolar supply support, and guaranteed power-on wiper recall-making it the only option for self-contained, high-reliability analog calibration in extended temperature industrial systems.

Availability

ISL22424WFV14Z-TK is available at Aetrix Electronics and suitable for instrumentation calibration, programmable gain amplifiers, bipolar signal conditioning, embedded sensor interfaces, and industrial process control requiring stable component supply across extended temperature ranges.

Supply support for ISL22424WFV14Z-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 full technical and manufacturing continuity for the ISL22424 family. Renesas is a global semiconductor leader focused on microcontrollers, analog, and power solutions.

The ISL22424 product line was designed for high-precision, maintenance-free analog trimming in mission-critical industrial and automotive systems where non-volatile configuration, temperature resilience, and dual-channel integration are mandatory.

FAQ

What is the maximum SPI clock frequency supported by the ISL22424WFV14Z-TK?

The ISL22424WFV14Z-TK supports SPI clock frequencies up to 5 MHz, as specified in the Serial Interface Specifications section of the FN6425 datasheet. This allows for sub-100 µs wiper updates, enabling real-time calibration in closed-loop control systems. The device operates in SPI Mode 0 (CPOL = 0, CPHA = 0), with setup/hold times validated down to 50 ns.

Does the ISL22424WFV14Z-TK retain its wiper position after power cycling?

Yes, the ISL22424WFV14Z-TK retains its wiper position after power cycling via its non-volatile Initial Value Registers (IVR0 and IVR1). At power-up, once VCC exceeds 1.9 V, the device automatically recalls the stored IVR values into the volatile Wiper Registers (WR0 and WR1) within 5 ms. This eliminates the need for MCU initialization code or external memory.

Can the ISL22424WFV14Z-TK operate with a single 3.3 V supply?

No - the ISL22424WFV14Z-TK requires dual supplies: VCC (2.25–5.5 V) and V− (−2.25 to −5.5 V). It cannot operate on a single 3.3 V rail. However, V− may be grounded (0 V) only if the application does not require negative terminal voltage swing; doing so forfeits bipolar functionality and violates absolute maximum ratings if any DCP pin is driven below GND.

How many general-purpose non-volatile registers does the ISL22424WFV14Z-TK include?

The ISL22424WFV14Z-TK includes 13 general-purpose non-volatile registers (addresses 0x02–0x0E), each 8 bits wide. These can store calibration coefficients, device-specific identifiers, or lookup table entries. They are accessible via the same SPI interface used for wiper control and retain data for 50 years at ≤+55°C, matching the endurance specification of 1,000,000 write cycles per bit.

What is the wiper resistance specification for the ISL22424WFV14Z-TK?

The ISL22424WFV14Z-TK has a typical wiper resistance of 70 Ω at 1 mA, with a maximum of 250 Ω. This low on-resistance minimizes insertion error in precision voltage divider configurations and ensures predictable loading effects in feedback networks - critical for maintaining gain accuracy in op-amp circuits.