Renesas ISL88002IH29Z-TK

Overview

ISL88002IH29Z-TK from Renesas Electronics is an ultra-low-power open-drain voltage supervisor IC with 2.92V fixed reset threshold, 160nA supply current, ±1.2% threshold accuracy, and 190ms power-on reset timeout - used to ensure reliable microprocessor startup and brownout protection in battery-powered systems.

For engineers reviewing the ISL88002IH29Z-TK datasheet, ISL88002IH29Z-TK pinout, ISL88002IH29Z-TK application, or ISL88002IH29Z-TK equivalent, key selection criteria include reset output type (open-drain), VDD monitoring range (1.8V–5.5V), minimum operating voltage (1V), hysteresis-enabled noise immunity, and SOT-23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The ISL88002IH29Z-TK implements a precision bandgap-based voltage reference comparator with factory-trimmed 2.92V trip point and 1% hysteresis to prevent false resets during supply transients. Its internal POR circuit asserts reset at VDD = 1V and holds it for ≥140ms after VDD exceeds threshold.

This device operates as a single-supply monitor with no external components required: VDD serves both as power input and monitored rail; RST is an active-low open-drain output requiring an external pull-up resistor (5kΩ–100kΩ); GND provides the reference ground. It is specified for -40°C to +85°C industrial temperature range.

Key Specifications

Pinout & Package

ISL88002IH29Z-TK is housed in a Pb-free 3-lead SOT-23 package (JEDEC TO-236, pkg drawing P3.064), measuring 2.92mm × 1.30mm × 1.00mm with 0.95mm lead pitch. The package is RoHS-compliant and rated MSL1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SUR+T and TPS3808G33DBVR, the ISL88002IH29Z-TK delivers 7× lower quiescent current and exact 2.92V threshold alignment for 3.0V nominal rails - making it optimal for energy-critical, space-constrained applications where open-drain flexibility and sub-1V reset validity are essential design requirements.

Availability

ISL88002IH29Z-TK is available at Aetrix Electronics and suitable for microprocessor power-up control, battery-powered sensor nodes, and industrial controller brownout protection requiring stable component supply across extended production lifecycles.

Supply support for ISL88002IH29Z-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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets with focus on reliability, low power, and system integration.

The ISL88002IH29Z-TK belongs to Renesas' ultra-low-power voltage supervisor family designed specifically for energy-sensitive applications such as portable medical devices, wireless sensors, and battery-backed controllers where precision threshold accuracy and nanoamp-level current consumption are critical.

FAQ

What is the reset output configuration of the ISL88002IH29Z-TK?

The ISL88002IH29Z-TK features an active-low open-drain RST output. This requires an external pull-up resistor (5kΩ–100kΩ) to a logic rail - enabling wired-OR reset bus architectures and flexible voltage-level interfacing. Unlike push-pull variants (e.g., ISL88001), the ISL88002IH29Z-TK cannot drive high actively; its RST pin pulls low during reset and floats otherwise.

Does the ISL88002IH29Z-TK require external components to operate?

No, the ISL88002IH29Z-TK operates with zero external components for basic supervision. Only an external pull-up resistor on the RST pin is needed due to its open-drain output configuration. No capacitors, resistors, or trimming networks are required for threshold setting, timing, or stability - simplifying layout and reducing BOM cost.

What is the minimum supply voltage at which the ISL88002IH29Z-TK remains functional?

The ISL88002IH29Z-TK asserts a valid reset signal down to VDD = 1V. Below this, the internal circuitry may not operate reliably. This 1V minimum enables robust brownout detection in deeply sagging supplies where many competing supervisors lose functionality - a key advantage in battery-depleted or high-impedance power scenarios.

How accurate is the 2.92V reset threshold of the ISL88002IH29Z-TK over temperature?

The ISL88002IH29Z-TK's 2.92V threshold maintains ±1.2% accuracy over the full -40°C to +85°C industrial temperature range. Figure 8 in the FN6174 datasheet shows variation of <±5mV across temperature, supported by a low 0.48mV/°C temperature coefficient - ensuring consistent performance without recalibration in thermally varying environments.

Is the ISL88002IH29Z-TK pin-compatible with other members of the ISL8800x family?

Yes, the ISL88002IH29Z-TK shares identical 3-pin SOT-23 pinout (GND-RST-VDD) with all ISL88001/002/003 variants in SOT-23 packaging, including ISL88001IH29Z-TK and ISL88003IH29Z-TK. However, output type differs: ISL88001 uses push-pull RST, ISL88002 uses open-drain RST, and ISL88003 uses push-pull active-high RST - requiring schematic review before substitution.