Renesas ISL22316UFU10Z-TK

Overview

ISL22316UFU10Z-TK from Renesas (formerly Intersil) is a single-channel digitally controlled potentiometer (XDCP™) with I²C interface, 128-tap resolution, non-volatile wiper position storage, 50kΩ end-to-end resistance, and operation from 2.7V to 5.5V supply. It functions as a programmable voltage divider or rheostat in precision analog trimming circuits for sensor calibration and power supply feedback loops.

For engineers reviewing the ISL22316UFU10Z-TK datasheet, ISL22316UFU10Z-TK pinout, ISL22316UFU10Z-TK application, or ISL22316UFU10Z-TK equivalent, key selection criteria include I²C address configurability (A0/A1), shutdown current ≤5µA at +85°C, wiper resistance of 70Ω typical at 3.3V, ±80ppm/°C end-to-end tempco (U option), and MSOP-10 package compatibility with industrial temperature range (-40°C to +125°C).

Technical Context

The ISL22316UFU10Z-TK implements a monolithic CMOS resistor ladder with CMOS switch matrix controlled by a 7-bit volatile Wiper Register (WR) and backed by an 8-bit non-volatile Initial Value Register (IVR). Power-up recalls IVR contents into WR, ensuring repeatable startup position without host intervention.

I²C communication uses open-drain SDA/SCL with two address pins (A0, A1) enabling up to four devices per bus. Shutdown mode-activated via SHDN pin or ACR register bit-disconnects RH, shorts RW to RL, and reduces supply current to ≤5µA while preserving register accessibility.

Key Specifications

Pinout & Package

ISL22316UFU10Z-TK is housed in a Pb-free 10-lead MSOP package (M10.118), 3.0mm × 3.0mm footprint, 0.5mm pitch, with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-50-R7 and MCP45HV51-503E/MS, the ISL22316UFU10Z-TK uniquely combines I²C address flexibility (A0/A1), hardware shutdown, and guaranteed power-up wiper recall-making it optimal for space-constrained industrial controllers where deterministic startup behavior and bus scalability are essential.

Availability

ISL22316UFU10Z-TK is available at Aetrix Electronics and suitable for power supply trimming, sensor calibration, laser bias control, and audio level adjustment requiring stable component supply across extended temperature ranges.

Supply support for ISL22316UFU10Z-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 Corporation is a global semiconductor leader delivering trusted embedded design innovation through high-performance analog, power management, and microcontroller solutions.

The ISL22316 series was designed specifically for precision analog reconfiguration in harsh-environment industrial and automotive systems, emphasizing non-volatility, wide temperature operation, and robust I²C interoperability.

FAQ

What is the default wiper position after power-up for the ISL22316UFU10Z-TK?

Upon power-up, the ISL22316UFU10Z-TK first resets the Wiper Register (WR) to 40h (64 decimal), placing the wiper near mid-scale. Then, within 3ms, it loads the stored value from the non-volatile Initial Value Register (IVR) into WR-so the final position reflects the last saved setting unless IVR was never written. This behavior is guaranteed across the full -40°C to +125°C range.

Does the ISL22316UFU10Z-TK support true hardware shutdown independent of I²C commands?

Yes. The ISL22316UFU10Z-TK features a dedicated active-low SHDN pin that forces RH into open-circuit and shorts RW to RL regardless of I²C state or ACR register settings. This hardware shutdown draws ≤5µA at +85°C and preserves full register access-allowing configuration updates even while the DCP is disabled.

Can multiple ISL22316UFU10Z-TK devices share the same I²C bus without address conflict?

Yes. The ISL22316UFU10Z-TK uses pins A0 and A1 to configure the two LSBs of its 7-bit I²C slave address, supporting up to four unique addresses (0x50–0x53) on a single bus. Each device must have distinct A0/A1 logic levels; floating address pins are not permitted and will cause communication failure.

What is the maximum allowable voltage across the RH–RL terminals of the ISL22316UFU10Z-TK?

The absolute maximum voltage between any DCP pin (RH, RL, RW) and GND is VCC. Since VCC is rated from 2.7V to 5.5V, the maximum safe RH–RL differential is 5.5V. Exceeding this-even briefly-may damage the internal CMOS switches. For higher-voltage applications, external level-shifting or series resistors are required.

How does the ISL22316UFU10Z-TK ensure monotonicity during wiper transitions?

The ISL22316UFU10Z-TK uses "make-before-break" switching architecture: the next switch closes before the previous one opens. This prevents momentary open-circuits and guarantees monotonic resistance change-verified by DNL ≤±0.5 LSB across all 128 taps in both voltage divider and rheostat modes, critical for stability in closed-loop systems.