Renesas ISL90462UIH627Z-TK

Overview

ISL90462UIH627Z-TK from Intersil is a volatile digitally controlled potentiometer (XDCP™) configured as a 50kΩ variable resistor with 32-tap resolution, 2-pin Up/Down interface, and ±35ppm/°C tempco, used for precision bias and gain adjustment in sensor signal conditioning circuits.

For engineers reviewing the ISL90462UIH627Z-TK datasheet, ISL90462UIH627Z-TK pinout, ISL90462UIH627Z-TK application, or ISL90462UIH627Z-TK equivalent, key selection criteria include wiper current rating (±0.6mA), active supply current (25µA max), volatile memory behavior, SOT-23-6 package compatibility, and RH/RW terminal voltage range (0 to VDD).

Technical Context

The ISL90462UIH627Z-TK implements a 31-element resistor array with electronic wiper switching controlled by CS and U/D inputs; wiper position is stored in volatile memory only upon CS high transition, and no nonvolatile storage is present.

It operates as a 2-terminal variable resistor or 3-terminal voltage divider depending on external connections: RH connects to reference voltage, GND serves as low terminal, and RW delivers the adjustable output, with all terminals rated for 2.7V–5.5V operation.

Key Specifications

Pinout & Package

ISL90462UIH627Z-TK is housed in a Pb-free 6-lead SOT-23 package (JEDEC MO-178AB, pkg drawing P6.064), with 1.60mm × 2.80mm footprint, 0.95mm height, and 0.65mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL90462UIH627Z-TK, AD5170BRJZ-50-R7 adds nonvolatility at the cost of interface complexity, while MCP4017T-503E/OT offers higher resolution but sacrifices settling speed-both retain SOT-23-6 compatibility and 50kΩ RTOTAL for direct layout reuse.

Availability

ISL90462UIH627Z-TK is available at Aetrix Electronics and suitable for LCD contrast control, laser diode biasing, and pressure sensor offset trim requiring stable component supply and industrial temperature support.

Supply support for ISL90462UIH627Z-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

Intersil Corporation is a precision analog and power management semiconductor company, now part of Renesas Electronics, delivering high-reliability solutions for industrial, automotive, and infrastructure markets.

The ISL90462 product line delivers volatile digital potentiometers optimized for low-power, high-tempco-stability bias and gain trimming in sensor interfaces and optical subsystems.

FAQ

What is the default wiper position of the ISL90462UIH627Z-TK after power-up?

The ISL90462UIH627Z-TK initializes its wiper to tap 16 (mid-scale) on power-up due to its volatile memory architecture. This behavior is guaranteed across all operating conditions and requires no external reset sequence. The device does not retain prior wiper position after VDD removal, so host firmware must reprogram the desired setting during system initialization. ISL90462UIH627Z-TK's mid-scale default provides a safe starting point for bias-sensitive circuits before calibration.

Does the ISL90462UIH627Z-TK support bidirectional current flow through the wiper terminal (RW)?

Yes, the ISL90462UIH627Z-TK supports bidirectional current flow through the RW terminal, with a maximum rating of ±0.6mA per the datasheet. This allows use in both sourcing and sinking configurations-for example, driving an op-amp inverting input or sinking current from a photodiode amplifier. Exceeding ±0.6mA may cause wiper contact degradation or voltage error due to IR drop across internal switches. ISL90462UIH627Z-TK's symmetric current rating ensures consistent performance regardless of signal polarity.

Can the ISL90462UIH627Z-TK be used as a 3-terminal voltage divider?

Yes, the ISL90462UIH627Z-TK can operate as a 3-terminal voltage divider by connecting VDD to RH, GND to GND, and using RW as the adjustable output node. In this configuration, the output voltage ranges from 0V to VDD in 32 discrete steps. The RH and RW terminals must remain within 0V to VDD, and no external voltage may be applied beyond those rails. ISL90462UIH627Z-TK's design explicitly supports this mode, as confirmed by the block diagram and pin descriptions in FN8230 Rev 4.00.

What is the maximum toggle rate supported by the Up/Down interface of the ISL90462UIH627Z-TK?

The ISL90462UIH627Z-TK supports an Up/Down toggle rate up to 1MHz, as specified in the Timing Specifications table on page 4 of FN8230 Rev 4.00. This allows full-scale wiper movement (31 steps) in ≤31µs. To maintain timing integrity, tCU (U/D to CS setup) must be ≥25ns and tIL/tIH (U/D low/high period) ≥300ns. ISL90462UIH627Z-TK's 1MHz capability enables real-time calibration loops in closed-loop sensor systems without microcontroller intervention.

Is the ISL90462UIH627Z-TK RoHS compliant and compatible with lead-free reflow profiles?

Yes, the ISL90462UIH627Z-TK is RoHS compliant and qualified for Pb-free reflow processing, as stated in the "Pb-Free Plus Anneal Available" feature and Note on page 1 of FN8230 Rev 4.00. It uses 100% matte tin plate termination finish and meets or exceeds IPC/JEDEC J-STD-020 requirements for peak reflow temperatures. The device is MSL Level 1 and supports standard lead-free solder profiles up to 260°C. ISL90462UIH627Z-TK's packaging documentation confirms full compatibility with SnAgCu assembly processes.