Renesas ISL90462TIE627-TK

Overview

ISL90462TIE627-TK from Intersil is a volatile digitally controlled potentiometer (XDCP™) configured as a 100kΩ end-to-end variable resistor with 32 discrete wiper tap points, 2-pin UP/DN interface, and operation from 2.7V to 5.5V supply. It serves as a solid-state replacement for mechanical potentiometers in precision bias and gain adjustment circuits, such as laser diode driver biasing and sensor transducer calibration.

For engineers reviewing the ISL90462TIE627-TK datasheet, ISL90462TIE627-TK pinout, ISL90462TIE627-TK application, or ISL90462TIE627-TK equivalent, key selection criteria include its SC-70-6 package, ±35ppm/°C tempco, 25µA max active current, volatile memory architecture, and compatibility with low-power industrial sensor interfaces requiring stable analog tuning without EEPROM overhead.

Technical Context

The ISL90462TIE627-TK implements a 31-element resistor array with electronic wiper switching controlled by CS and U/D inputs; wiper position is stored only in volatile memory and resets on power cycle. Its 2-pin serial interface eliminates clock/data lines, reducing PCB routing complexity versus I²C or SPI DCPs.

It operates exclusively 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 tap point. Wiper resistance is fixed at 600Ω, and settling time after tap change is 1µs.

Key Specifications

Pinout & Package

ISL90462TIE627-TK is housed in a 6-lead SC-70 package (JEDEC MO203AB, Intersil P6.049), measuring 2.15mm × 1.35mm × 0.95mm, with gull-wing leads and RoHS-compliant matte tin plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL90462TIE627-TK, AD5170BRJZ-100-R7 adds EEPROM retention but increases BOM cost and interface complexity, while MCP4017T-104E/OT matches SC-70-6 footprint and tap count but trades higher wiper resistance for wider supply range-making ISL90462TIE627-TK optimal for 2.7V–5.5V industrial bias tuning where minimal wiper resistance and proven tempco are critical.

Availability

ISL90462TIE627-TK is available at Aetrix Electronics and suitable for LCD contrast control, laser diode biasing, and pressure sensor calibration requiring stable component supply, consistent parametric performance, and long-term industrial temperature support.

Supply support for ISL90462TIE627-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, now part of Renesas Electronics, designs high-performance analog and mixed-signal ICs for power management, precision analog, and timing applications.

The ISL90462 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered specifically for replacing mechanical trimmers in industrial, automotive, and sensor signal-conditioning systems where reliability, small size, and low power are essential.

FAQ

What is the default wiper position of the ISL90462TIE627-TK at power-on?

The ISL90462TIE627-TK initializes its wiper to tap position 16 (mid-scale) upon power-up due to its volatile memory architecture. This deterministic reset behavior eliminates unpredictable startup states and simplifies system initialization routines. No external programming is needed to achieve center-tap operation, making ISL90462TIE627-TK ideal for applications requiring repeatable analog startup conditions.

Does the ISL90462TIE627-TK support 3-terminal voltage divider operation?

Yes, the ISL90462TIE627-TK supports 3-terminal operation: connect RH to a reference voltage, GND to ground, and use RW as the adjustable output node. The device's internal resistor array and wiper switching network allow it to function as a programmable voltage divider. This configuration is commonly used in sensor offset trimming and gain control circuits where ISL90462TIE627-TK delivers precise, digitally set ratios across its 32 taps.

What is the maximum allowable voltage on the RH, RW, and U/D pins relative to GND?

The absolute maximum voltage on RH, RW, and U/D pins is specified as -1V to +7V relative to GND. However, for reliable operation within recommended conditions, these pins must remain within the VDD–GND range (2.7V to 5.5V). Exceeding VDD on RH or RW may cause unintended current flow through internal switches, and violating the -1V lower limit risks latch-up. Always reference ISL90462TIE627-TK signals to its local GND plane.

Can the ISL90462TIE627-TK be used in automotive applications?

The ISL90462TIE627-TK is rated for -40°C to +85°C operation and meets industrial temperature requirements, but it is not AEC-Q200 qualified or specified for automotive under-hood use. While it has been deployed in automotive infotainment and cabin sensor modules, design-in for safety-critical or engine-compartment applications requires additional qualification testing. For automotive-grade alternatives, consult Renesas' AEC-Q200-certified DCP portfolio.

How does the ISL90462TIE627-TK handle wiper movement at extreme tap positions?

The ISL90462TIE627-TK implements hard stop logic: when the wiper reaches tap 0 (GND) or tap 31 (RH), further UP or DOWN commands have no effect-the counter does not wrap around. This mimics mechanical potentiometer end-stops and prevents erroneous output states. The wiper remains stable at boundary positions until directed inward, ensuring predictable behavior in closed-loop calibration algorithms using ISL90462TIE627-TK.