Renesas ISL88002IH22Z-TK

Overview

ISL88002IH22Z-TK from Renesas Electronics is an ultra-low-power, open-drain voltage supervisor IC designed for precise monitoring of 2.19V power rails in battery-powered and space-constrained systems. It delivers ±1.2% threshold accuracy, 160nA supply current at 1.8V, 190ms power-on reset timeout, and valid reset assertion down to VDD = 1V. It serves as a system-level power integrity guard in microcontroller-based portable instrumentation.

For engineers reviewing the ISL88002IH22Z-TK datasheet, ISL88002IH22Z-TK pinout, ISL88002IH22Z-TK application, or ISL88002IH22Z-TK equivalent, key selection criteria include its SOT-23-3 open-drain RST output, 2.19V fixed trip point, industrial temperature range (–40°C to +85°C), and compatibility with low-voltage logic interfaces requiring external pull-up.

Technical Context

The ISL88002IH22Z-TK implements a precision bandgap reference and comparator circuit to monitor VDD against a factory-trimmed 2.19V threshold with 1% hysteresis. Its internal POR circuit asserts reset at VDD ≥ 1V and holds RST low until VDD exceeds 2.19V for ≥190ms.

As an open-drain output device, it requires an external pull-up resistor (5kΩ–100kΩ) on the RST line to interface with CMOS inputs. It operates across 1.8V–2.75V supply range and maintains stable performance over –40°C to +85°C without external components.

Key Specifications

Pinout & Package

ISL88002IH22Z-TK is housed in a Pb-free 3-lead SOT-23 package (JEDEC TO-236), measuring 2.92mm × 1.30mm × 1.00mm, with gull-wing leads and matte tin (e3) termination.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SUR+T and TPS3808G12QDBVRQ1, the ISL88002IH22Z-TK offers the lowest quiescent current and smallest footprint for fixed 2.19V supervision, making it optimal for ultra-low-power portable designs where open-drain flexibility is advantageous.

Availability

ISL88002IH22Z-TK is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, handheld test meters, and low-power smart meters requiring stable component supply and long-term production continuity.

Supply support for ISL88002IH22Z-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 microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.

The ISL88002IH22Z-TK belongs to Renesas' Ultra Low Power Voltage Supervisor family, engineered specifically for battery-operated and space-constrained embedded systems needing precision, minimal current draw, and robust power sequencing.

FAQ

What is the exact reset threshold voltage of the ISL88002IH22Z-TK?

The ISL88002IH22Z-TK has a nominal reset threshold voltage of 2.19V, with guaranteed accuracy of ±1.2% over the full industrial temperature range (–40°C to +85°C). This value is factory-trimmed and specified in the Electrical Specifications table on page 8 of FN6174 Rev 3.00.

Does the ISL88002IH22Z-TK require an external pull-up resistor on the RST pin?

Yes, the ISL88002IH22Z-TK features an open-drain RST output and requires an external pull-up resistor between RST and VDD. The datasheet recommends values from 5kΩ to 100kΩ depending on rise time and bus loading requirements. This configuration enables wired-OR reset networks and voltage-level translation.

What is the minimum supply voltage at which the ISL88002IH22Z-TK can assert reset?

The ISL88002IH22Z-TK asserts reset when VDD rises to 1V - the POR activation point - and maintains valid reset signaling down to this level. This ensures early fault detection even during severe undervoltage conditions before the monitored system reaches operational voltage.

Is the ISL88002IH22Z-TK pin-compatible with other members of the ISL8800x family?

Yes, the ISL88002IH22Z-TK shares identical 3-lead SOT-23 pinout with all ISL88001/2/3 variants in the same package, including ISL88001IH22Z-TK (push-pull) and ISL88003IH22Z-TK (push-pull active-high). Only the RST output behavior differs; no PCB redesign is needed when swapping within the same package type.

What is the typical supply current consumption of the ISL88002IH22Z-TK at 1.8V?

The ISL88002IH22Z-TK draws 160nA typical supply current at VDD = 1.8V and TA = +25°C, as specified in the Electrical Specifications table under IDD. This ultra-low quiescent current enables multi-year operation on primary batteries in always-on monitoring applications.