Renesas ISL88002IH46Z-TK

Overview

ISL88002IH46Z-TK from Renesas Electronics is an ultra-low-power 3-lead voltage supervisor IC with open-drain active-low reset output, 4.62V fixed threshold, ±1.2% accuracy over -40°C to +85°C, and 160nA supply current - designed for brownout detection and power-on reset in battery-powered microcontroller systems.

For engineers reviewing the ISL88002IH46Z-TK datasheet, ISL88002IH46Z-TK pinout, ISL88002IH46Z-TK application, or ISL88002IH46Z-TK equivalent, key selection criteria include reset output type (open-drain), VDD trip point tolerance, minimum operating voltage (1V), POR timeout (190ms typ.), and compatibility with SOT-23 footprint constraints.

Technical Context

The ISL88002IH46Z-TK implements a precision bandgap-based voltage reference comparator with hysteresis to prevent noise-induced reset chatter. It asserts reset when VDD falls below 4.62V (±1.2%) and holds reset until VDD exceeds the threshold for ≥190ms after power-up or recovery.

Its open-drain RST output requires an external pull-up resistor (5kΩ–100kΩ) and remains low during reset assertion; it releases high-impedance when VDD is valid. The device operates down to VDD = 1V, enabling reliable reset generation even during deep brownout conditions.

Key Specifications

Pinout & Package

ISL88002IH46Z-TK is housed in a Pb-free 3-lead SOT-23 package (JEDEC TO-236, pkg drawing P3.064), with 1.30mm × 2.37mm body size and 0.95mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with MAX809SEUR+T and TPS3808G33DBVR, the ISL88002IH46Z-TK delivers superior battery efficiency (160nA vs >800nA), tighter threshold tolerance (±1.2% vs ±2.5%), and direct compatibility with existing 4.6V rail designs - making it optimal for long-life, noise-sensitive, and footprint-constrained applications.

Availability

ISL88002IH46Z-TK is available at Aetrix Electronics and suitable for microcontroller power monitoring, portable medical devices, industrial PLC modules, and smart sensor node designs requiring stable component supply and long-term lifecycle support.

Supply support for ISL88002IH46Z-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 is a global semiconductor leader delivering high-performance analog, mixed-signal, and embedded processing solutions for automotive, industrial, infrastructure, and IoT markets.

The ISL88002IH46Z-TK belongs to Renesas' ultra-low-power voltage supervisor family, engineered specifically for reliable power-on reset and brownout protection in battery-operated and space-constrained electronic systems.

FAQ

What is the reset output configuration of the ISL88002IH46Z-TK?

The ISL88002IH46Z-TK features an open-drain active-low reset output (RST pin). During reset assertion, the output sinks current to GND; otherwise, it presents high-impedance. An external pull-up resistor (5kΩ–100kΩ) is required to establish the logic-high state. This configuration enables wired-OR reset buses and voltage-level translation - a key differentiator from push-pull alternatives like the ISL88001 or ISL88003.

What is the exact voltage threshold and accuracy of the ISL88002IH46Z-TK?

The ISL88002IH46Z-TK has a nominal reset threshold of 4.62V with ±1.2% accuracy over the full -40°C to +85°C temperature range. At +25°C, the specified range is 4.570V to 4.681V. This tight tolerance ensures robust detection of 5V rail collapse while maintaining margin against ripple and noise - critical for reliable operation in industrial and portable applications where the ISL88002IH46Z-TK is deployed.

Does the ISL88002IH46Z-TK require external components to operate?

No, the ISL88002IH46Z-TK requires no external components for basic operation. Its internal bandgap reference, comparator, POR timer, and hysteresis circuitry are fully integrated. Only an external pull-up resistor on the RST pin is needed due to its open-drain architecture. This eliminates RC timing networks, external references, or additional decoupling beyond standard VDD bypassing - simplifying design and reducing bill-of-materials cost for the ISL88002IH46Z-TK.

What is the minimum supply voltage at which the ISL88002IH46Z-TK can assert a valid reset signal?

The ISL88002IH46Z-TK guarantees valid reset assertion down to VDD = 1V. This capability ensures deterministic brownout response even during deep discharge of lithium-based batteries or severe line sags where other supervisors cease functioning. The reset remains asserted until VDD rises above 4.62V and sustains that level for ≥190ms - a feature explicitly validated in the ISL88002IH46Z-TK datasheet and essential for fail-safe behavior in safety-critical systems.

Is the ISL88002IH46Z-TK pin-compatible with industry-standard voltage supervisors?

The ISL88002IH46Z-TK shares the same 3-lead SOT-23 footprint and pinout (GND-RST-VDD) as MAX803, MAX809, and MAX810, but differs in output type: those Maxim parts use push-pull outputs, whereas the ISL88002IH46Z-TK uses open-drain. Therefore, direct substitution requires verifying pull-up resistor presence and logic polarity compatibility. The ISL88002IH46Z-TK is not a drop-in replacement but offers superior accuracy (±1.2% vs ±2.5%) and ultra-low current (160nA vs ~1.2µA) - advantages that justify layout adjustment in new designs targeting the ISL88002IH46Z-TK.