Renesas ISL90460UIH527Z-TK

Overview

ISL90460UIH527Z-TK from Intersil is a volatile, single-channel, 32-tap digitally controlled potentiometer (XDCP) configured as a rheostat with 50kΩ end-to-end resistance, ±35ppm/°C tempco, and 2-pin Up/Down interface. It operates from 2.7V to 5.5V, draws ≤25µA active current, and targets precision bias and gain control in analog signal paths.

For engineers reviewing the ISL90460UIH527Z-TK datasheet, ISL90460UIH527Z-TK pinout, ISL90460UIH527Z-TK application, or ISL90460UIH527Z-TK equivalent, key selection criteria include its SOT-23-5 package, wiper-to-ground rheostat topology, volatile memory behavior, 1µs output settling time, and compatibility with low-power industrial sensor conditioning circuits.

Technical Context

The ISL90460UIH527Z-TK implements a 31-element resistor array with electronically switched taps, where the wiper connects RH to one of 32 discrete points between RH and GND. Control logic responds to CS (chip select) and U/D (up/down) signals to increment or decrement a volatile counter that selects the tap point.

Its operation requires CS low to enable counting, followed by U/D toggling at ≤1MHz; on CS high, the wiper position latches and the device enters standby mode drawing only 0.3µA. The RH terminal serves as both wiper and high-side terminal, forming a two-terminal variable resistor referenced to GND.

Key Specifications

Pinout & Package

ISL90460UIH527Z-TK is housed in a 5-lead SOT-23 (JEDEC MO-178AA, pkg drawing P5.064), measuring 2.9mm × 1.6mm × 1.1mm, 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 ISL90460UIH527Z-TK, the TIH527Z-TK offers higher resistance for reduced current loading, while the ISL90461UIH527Z-TK adds nonvolatile storage-both maintain identical SOT-23-5 footprint and UP/DN control protocol but address distinct system-level requirements for initialization and persistence.

Availability

ISL90460UIH527Z-TK is available at Aetrix Electronics and suitable for LCD contrast control, laser diode biasing, and sensor transducer adjustment requiring stable component supply and guaranteed long-term sourcing.

Supply support for ISL90460UIH527Z-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 infrastructure solutions.

The ISL90460 product line delivers volatile digital potentiometers optimized for low-power, space-constrained analog trimming in sensor interfaces, optical modules, and human-machine interface subsystems.

FAQ

What is the resistance tolerance and temperature coefficient of the ISL90460UIH527Z-TK?

The ISL90460UIH527Z-TK has a nominal end-to-end resistance of 50kΩ with ±20% initial tolerance (derived from 40kΩ min / 60kΩ max in datasheet Table on p.3). Its typical temperature coefficient is ±35ppm/°C over -40°C to +85°C, ensuring stable resistance drift in industrial environments. This tempco value is measured and specified in the Potentiometer Specifications table under RTOTAL temperature coefficient.

Does the ISL90460UIH527Z-TK retain its wiper position after power cycling?

No, the ISL90460UIH527Z-TK uses volatile memory only. Upon power-up, the wiper defaults to mid-scale (tap 16) unless actively repositioned by the host controller via U/D and CS signals. This behavior is inherent to its architecture and explicitly stated in the datasheet's "Principles of Operation" section. For nonvolatile retention, consider the pin-compatible ISL90461UIH527Z-TK variant.

Can the ISL90460UIH527Z-TK be used as a three-terminal potentiometer (variable voltage divider)?

No-the ISL90460UIH527Z-TK is internally configured exclusively as a two-terminal rheostat. Its RH pin serves as both wiper and high-side terminal, while GND is the fixed low-side terminal; there is no separate RL or RW pin. The datasheet's "Pin Descriptions" and "Equivalent Circuit" confirm this topology. For three-terminal operation, a different XDCP family member or external wiring adaptation would be required.

What is the maximum toggle rate supported on the U/D pin of the ISL90460UIH527Z-TK?

The ISL90460UIH527Z-TK supports an Up/Down toggle rate of up to 1MHz, as specified in the Timing Specifications table (p.4). This allows rapid wiper stepping-e.g., full 32-tap traversal in ≤32µs-with guaranteed timing margins including tIL/tIH ≥300ns and fTOGGLE = 1MHz. Exceeding this rate may result in missed steps or metastability.

Is the ISL90460UIH527Z-TK RoHS compliant and lead-free?

Yes, the ISL90460UIH527Z-TK is RoHS compliant and features Pb-free plus anneal construction: 100% matte tin plate termination finish, RoHS-compliant molding compounds and die attach materials. This is confirmed in the "Ordering Information" and "Features" sections of the datasheet, and the package drawing P5.064 specifies Pb-free compliance per JEDEC standards.