Renesas ISL90460TIE527-TK

Overview

ISL90460TIE527-TK from Intersil is a volatile 32-tap digitally controlled potentiometer (XDCP) configured as a rheostat with RH-to-GND variable resistance, 100kΩ end-to-end value, ±35ppm/°C tempco, and 2-pin UP/DN interface. It delivers precise bias and gain control in sensor signal conditioning circuits.

For engineers reviewing the ISL90460TIE527-TK datasheet, ISL90460TIE527-TK pinout, ISL90460TIE527-TK application, or ISL90460TIE527-TK equivalent, key selection criteria include wiper settling time (1µs), standby current (0.3µA), RH terminal voltage range (2.7V–5.5V), and SC-70 package compatibility with space-constrained analog tuning designs.

Technical Context

The ISL90460TIE527-TK implements a 31-element resistor array with electronic wiper switching controlled by CS and U/D inputs, enabling discrete 32-position adjustment without serial protocol overhead. Its volatile memory stores wiper position only while powered, requiring reinitialization at power-up.

Operation relies on edge-triggered up/down counting synchronized to CS assertion: U/D state at CS falling edge determines increment/decrement direction, and wiper movement halts at physical endpoints without wraparound. Settling time of 1µs ensures stable RH-to-GND resistance after multi-tap transitions.

Key Specifications

Pinout & Package

ISL90460TIE527-TK is housed in a 5-lead SC-70 package (P5.049), measuring 2.15mm × 1.35mm × 0.90mm, with gull-wing leads optimized for high-density PCB layouts and reflow-compatible RoHS-compliant matte tin terminations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL90460TIE527-TK, the ISL90460TIH527Z-TK offers identical functionality in a larger SOT-23 package for easier handling and thermal performance, while the ISL23511IRUZ-TK trades UP/DN simplicity for nonvolatile storage and SPI flexibility-neither is pin-compatible, and both require layout or firmware changes.

Availability

ISL90460TIE527-TK is available at Aetrix Electronics and suitable for LCD contrast control, laser diode biasing, pressure sensor offset trim, and chemical sensor gain calibration requiring stable component supply and long-term obsolescence management.

Supply support for ISL90460TIE527-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 provider, now part of Renesas Electronics, with expertise in high-reliability industrial and automotive signal conditioning solutions.

The ISL90460 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical pots in analog tuning, calibration, and biasing circuits where reliability, size, and low power are critical.

FAQ

What is the maximum wiper current rating for the ISL90460TIE527-TK?

The ISL90460TIE527-TK has a maximum wiper current (IW) rating of ±0.6mA, as specified in the potentiometer specifications table. Exceeding this limit risks degradation of the internal CMOS wiper switches. This rating applies under all operating conditions and must be respected when configuring the ISL90460TIE527-TK in rheostat mode with external voltage applied across RH and GND.

Does the ISL90460TIE527-TK retain its wiper position after power cycling?

No, the ISL90460TIE527-TK uses volatile memory only; wiper position resets to a default state (typically mid-scale or last-set value depending on power-down timing) upon power loss. The ISL90460TIE527-TK requires external initialization at startup, making it unsuitable for applications needing persistent settings without host MCU intervention.

Can the ISL90460TIE527-TK be used as a three-terminal potentiometer?

No-the ISL90460TIE527-TK is internally configured exclusively as a two-terminal rheostat (RH-to-GND). The RL terminal is permanently tied to GND per the block diagram and pin description; there is no accessible third terminal for traditional potentiometer connections. This fixed topology is inherent to the ISL90460TIE527-TK design.

What is the absolute maximum voltage allowed on the U/D and CS pins of the ISL90460TIE527-TK?

The absolute maximum voltage on U/D and CS pins relative to GND is -1V to +7V, as stated in the Absolute Maximum Ratings table. However, for reliable operation, these inputs must remain within VIL and VIH thresholds (0.3×VDD and 0.7×VDD respectively) to ensure proper logic recognition. Applying voltages beyond VDD+0.3V or below GND may damage the ISL90460TIE527-TK.

How does the ISL90460TIE527-TK handle rapid successive U/D toggles?

The ISL90460TIE527-TK supports up to 1MHz U/D toggle rate, with minimum pulse widths of 300ns for HIGH and LOW periods. Wiper position advances one tap per qualifying U/D rising edge while CS is LOW. If toggled faster than the internal logic can resolve, steps may be missed-designs must respect tCU (25ns setup) and tIC (25ns hold) timing to ensure deterministic behavior of the ISL90460TIE527-TK.